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  Subjects -> GEOGRAPHY (Total: 493 journals)
Showing 1 - 200 of 277 Journals sorted alphabetically
40 [degrees] South     Full-text available via subscription   (Followers: 1)
AAG Review of Books     Hybrid Journal   (Followers: 2)
ACME : An International Journal for Critical Geographies     Open Access   (Followers: 3)
Acta Universitatis Lodziensis : Folia Geographica Socio-Oeconomica     Open Access   (Followers: 1)
Adam Academy : Journal of Social Sciences / Adam Akademi : Sosyal Bilimler Dergisi     Open Access   (Followers: 3)
Advances in Geosciences (ADGEO)     Open Access   (Followers: 20)
Advances in Statistical Climatology, Meteorology and Oceanography     Open Access   (Followers: 10)
Africa Spectrum     Open Access   (Followers: 18)
African Geographical Review     Hybrid Journal   (Followers: 2)
African Journal on Land Policy and Geospatial Sciences     Open Access   (Followers: 4)
Agronomía & Ambiente     Open Access   (Followers: 1)
AGU Advances     Open Access   (Followers: 16)
All Earth     Open Access   (Followers: 3)
American Journal of Geographic Information System     Open Access   (Followers: 14)
American Journal of Human Ecology     Open Access   (Followers: 12)
Amerika     Open Access   (Followers: 1)
Anales de Geografía de la Universidad Complutense     Open Access  
Annals of GIS     Open Access   (Followers: 31)
Annals of the American Association of Geographers     Hybrid Journal   (Followers: 48)
Antipode     Hybrid Journal   (Followers: 74)
Anuario     Open Access  
Applied Geography     Hybrid Journal   (Followers: 41)
Applied Geomatics     Hybrid Journal   (Followers: 4)
Ar@cne     Open Access  
Area Development and Policy     Hybrid Journal   (Followers: 2)
Asia Policy     Full-text available via subscription   (Followers: 6)
Asian Geographer     Hybrid Journal   (Followers: 5)
Asian Journal of Geographical Research     Open Access   (Followers: 2)
Atmospheric Measurement Techniques (AMT)     Open Access   (Followers: 20)
Atmospheric Measurement Techniques Discussions (AMTD)     Open Access   (Followers: 10)
Aurora Journal     Full-text available via subscription  
Australian Antarctic Magazine     Free   (Followers: 5)
Australian Geographer     Hybrid Journal   (Followers: 9)
Bandung : Journal of the Global South     Open Access   (Followers: 1)
Belgeo     Open Access   (Followers: 1)
Biblio3W : Revista Bibliográfica de Geografía y Ciencias Sociales     Open Access  
Biogeographia : The Journal of Integrative Biogeography     Open Access   (Followers: 2)
BioRisk     Open Access   (Followers: 2)
Boletim Goiano de Geografia     Open Access  
Boletín de Estudios Geográficos     Open Access  
Brill Research Perspectives in Map History     Full-text available via subscription   (Followers: 3)
Buildings & Landscapes: Journal of the Vernacular Architecture Forum     Full-text available via subscription   (Followers: 16)
Bulletin de la Société Géographique de Liège     Open Access  
Bulletin de l’association de géographes français     Open Access   (Followers: 1)
Bulletin of Geosciences     Open Access   (Followers: 11)
Bulletin of the Ecological Society of America     Open Access   (Followers: 5)
Bulletin of the Serbian Geographical Society     Open Access  
Caderno de Geografia     Open Access  
Cahiers Balkaniques     Open Access   (Followers: 2)
Cahiers Charlevoix : Études franco-ontariennes     Full-text available via subscription  
Cahiers franco-canadiens de l'Ouest     Full-text available via subscription   (Followers: 2)
California Italian Studies Journal     Full-text available via subscription   (Followers: 7)
Canadian Journal of Latin American and Caribbean Studies     Hybrid Journal   (Followers: 14)
Canadian Journal of Soil Science     Full-text available via subscription   (Followers: 12)
Cardinalis     Open Access  
Carnets de géographes     Open Access  
Cartographic Journal     Hybrid Journal   (Followers: 9)
Cartographic Perspectives     Open Access   (Followers: 2)
Cartographica : The International Journal for Geographic Information and Geovisualization     Full-text available via subscription   (Followers: 17)
Cartography and Geographic Information Science     Hybrid Journal   (Followers: 32)
Check List : The Journal of Biodiversity Data     Open Access   (Followers: 2)
China : An International Journal     Full-text available via subscription   (Followers: 22)
Climate and Development     Hybrid Journal   (Followers: 35)
Climate Change Economics     Hybrid Journal   (Followers: 52)
Comparative Cultural Studies : European and Latin American Perspectives     Open Access   (Followers: 9)
Computational Geosciences     Hybrid Journal   (Followers: 16)
Computational Urban Science     Open Access   (Followers: 2)
Confins     Open Access  
Creativity Studies     Open Access   (Followers: 6)
Critical Romani Studies     Open Access   (Followers: 1)
Cuadernos de Desarrollo Rural     Open Access  
Cuadernos de Geografía de la Universitat de València     Open Access  
Cuadernos de Investigación Geográfica / Geographical Research Letters     Open Access  
Cuadernos Inter.c.a.mbio sobre Centroamérica y el Caribe     Open Access   (Followers: 1)
Current Research in Geoscience     Open Access   (Followers: 6)
Dialogues in Human Geography     Hybrid Journal   (Followers: 23)
Didáctica Geográfica     Open Access  
DIE ERDE : Journal of the Geographical Society of Berlin     Open Access   (Followers: 1)
Documents d'Anàlisi Geogràfica     Open Access  
Earth System Governance     Open Access   (Followers: 4)
Earth Systems and Environment     Hybrid Journal   (Followers: 4)
East/West : Journal of Ukrainian Studies     Open Access  
Eastern European Countryside     Open Access   (Followers: 2)
Economic and Regional Studies / Studia Ekonomiczne i Regionalne     Open Access  
Economic Geography     Hybrid Journal   (Followers: 42)
Économie rurale     Open Access   (Followers: 3)
Ecosystems and People     Open Access   (Followers: 4)
Entorno Geográfico     Open Access   (Followers: 1)
Environmental and Sustainability Indicators     Open Access   (Followers: 7)
Environmental Science : Atmospheres     Open Access   (Followers: 3)
Environmental Science and Sustainable Development : International Journal Of Environmental Science & Sustainable Development     Open Access   (Followers: 14)
Ería : Revista Cuatrimestral de Geografía     Open Access  
Espacio y Desarrollo     Open Access  
Espaço & Economia : Revista Brasileira de Geografia Econômica     Open Access  
Espaço e Tempo Midiáticos     Open Access  
Estudios Socioterritoriales : Revista de Geografía     Open Access  
Ethnobiology Letters     Open Access  
Ethnoscientia : Brazilian Journal of Ethnobiology and Ethnoecology     Open Access  
Études internationales     Full-text available via subscription   (Followers: 1)
Études rurales     Open Access   (Followers: 2)
Études/Inuit/Studies     Full-text available via subscription  
European Bulletin of Himalayan Research     Open Access   (Followers: 9)
European Countryside     Open Access   (Followers: 1)
Evolutionary Human Sciences     Open Access   (Followers: 6)
Fennia : International Journal of Geography     Open Access   (Followers: 2)
Fire Ecology     Open Access   (Followers: 5)
Focus on Geography     Partially Free   (Followers: 5)
Forum Geografi     Open Access  
GEM - International Journal on Geomathematics     Hybrid Journal   (Followers: 1)
Genre & histoire     Open Access   (Followers: 4)
Geo : Geography and Environment     Open Access   (Followers: 10)
Geo-spatial Information Science     Open Access   (Followers: 8)
GeoArabia     Hybrid Journal  
Géocarrefour     Open Access   (Followers: 1)
Geochemistry, Geophysics, Geosystems     Full-text available via subscription   (Followers: 34)
Geochronometria     Open Access   (Followers: 1)
Geoderma Regional : The International Journal for Regional Soil Research     Full-text available via subscription   (Followers: 5)
Geoforum Perspektiv     Open Access   (Followers: 1)
Geografares     Open Access  
Geografisk Tidsskrift-Danish Journal of Geography     Hybrid Journal   (Followers: 3)
Geografiska Annaler, Series A : Physical Geography     Hybrid Journal   (Followers: 4)
Geographica Helvetica     Open Access   (Followers: 13)
Geographical Analysis     Hybrid Journal   (Followers: 11)
Geographical Education     Full-text available via subscription   (Followers: 2)
Geographical Journal of Nepal     Open Access  
Geographical Research     Hybrid Journal   (Followers: 12)
Geographical Review     Hybrid Journal   (Followers: 13)
Geographicalia     Open Access  
Géographie et cultures     Open Access   (Followers: 3)
Geography and Natural Resources     Hybrid Journal   (Followers: 10)
Geography and Sustainability     Open Access   (Followers: 5)
Geography Compass     Hybrid Journal   (Followers: 19)
GeoHumanities     Hybrid Journal   (Followers: 4)
GeoInformatica     Hybrid Journal   (Followers: 12)
Geoinformatics & Geostatistics     Hybrid Journal   (Followers: 10)
Geoinformatics FCE CTU     Open Access   (Followers: 5)
Geoingá : Revista do Programa de Pós-Graduação em Geografia     Open Access  
GeoJournal     Hybrid Journal   (Followers: 11)
GEOMATICA     Hybrid Journal   (Followers: 1)
Geomatics, Natural Hazards and Risk     Open Access   (Followers: 14)
GEOmedia     Open Access   (Followers: 1)
Geophysical Research Letters     Full-text available via subscription   (Followers: 236)
GeoScape     Open Access  
Geosciences Journal     Hybrid Journal   (Followers: 10)
Geosphere     Open Access   (Followers: 2)
Ghana Journal of Geography     Open Access   (Followers: 11)
Ghana Studies     Full-text available via subscription   (Followers: 15)
GIScience & Remote Sensing     Open Access   (Followers: 58)
Global Challenges     Open Access   (Followers: 2)
Global Sustainability     Open Access   (Followers: 5)
Globe, The     Full-text available via subscription   (Followers: 4)
GPS Solutions     Hybrid Journal   (Followers: 28)
Grafo Working Papers     Open Access  
HiN : Alexander von Humboldt im Netz. Internationale Zeitschrift für Humboldt-Studien     Open Access  
History of Geo- and Space Sciences     Open Access   (Followers: 2)
Huellas     Open Access  
Human Geography Journal     Open Access   (Followers: 4)
Hungarian Geographical Bulletin     Open Access  
IBEROAMERICANA. América Latina - España - Portugal     Open Access  
Imago Mundi: The International Journal for the History of Cartography     Hybrid Journal   (Followers: 21)
Indonesian Journal of Geography     Open Access   (Followers: 1)
Infrastructure Complexity     Open Access   (Followers: 5)
Interaction     Full-text available via subscription   (Followers: 3)
International Geology Review     Hybrid Journal   (Followers: 16)
International Indigenous Policy Journal     Open Access   (Followers: 15)
International Journal of Advanced Geosciences     Open Access   (Followers: 3)
International Journal of Applied Geospatial Research     Hybrid Journal   (Followers: 8)
International Journal of Bahamian Studies     Open Access   (Followers: 1)
International Journal of Cartography     Hybrid Journal   (Followers: 3)
International Journal of Disaster Risk Reduction     Hybrid Journal   (Followers: 21)
International Journal of Geographical Information Science     Hybrid Journal   (Followers: 56)
International Journal of Geoheritage and Parks     Open Access  
International Journal of Health Geographics     Open Access   (Followers: 8)
International Journal of Image and Data Fusion     Hybrid Journal   (Followers: 3)
International Journal of River Basin Management     Hybrid Journal   (Followers: 1)
InterSedes     Open Access   (Followers: 1)
Investigaciones Geográficas     Open Access  
Investigaciones Geográficas (Esp)     Open Access  
ISPRS International Journal of Geo-Information     Open Access   (Followers: 6)
Journal de la Société des Océanistes     Open Access   (Followers: 1)
Journal for the History of Environment and Society     Open Access   (Followers: 3)
Journal of Alpine Research : Revue de géographie alpine     Open Access  
Journal of Arid Land     Hybrid Journal  
Journal of Australian Studies     Hybrid Journal   (Followers: 5)
Journal of Borderlands Studies     Hybrid Journal   (Followers: 8)
Journal of Burma Studies     Full-text available via subscription   (Followers: 3)
Journal of Cape Verdean Studies     Open Access  
Journal of Cultural Geography     Hybrid Journal   (Followers: 19)
Journal of Developmental Entrepreneurship     Hybrid Journal   (Followers: 6)
Journal of Earthquake and Tsunami     Hybrid Journal   (Followers: 2)
Journal of Franco-Irish Studies     Open Access   (Followers: 1)
Journal of Geodesy and Geoinformation     Open Access   (Followers: 2)
Journal of Geographical Systems     Hybrid Journal   (Followers: 8)
Journal of Geography     Hybrid Journal   (Followers: 11)
Journal of Geography and Geology     Open Access   (Followers: 12)
Journal of Geography, Environment and Earth Science International     Open Access   (Followers: 1)
Journal of Geophysical Research : Atmospheres     Partially Free   (Followers: 191)
Journal of Geophysical Research : Biogeosciences     Full-text available via subscription   (Followers: 35)
Journal of Geophysical Research : Earth Surface     Partially Free   (Followers: 61)
Journal of Geophysical Research : Oceans     Partially Free   (Followers: 64)

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Geosphere
Journal Prestige (SJR): 1.752
Citation Impact (citeScore): 3
Number of Followers: 2  

  This is an Open Access Journal Open Access journal
ISSN (Print) 1553-040X - ISSN (Online) 1553-040X
Published by Geological Society of America Homepage  [4 journals]
  • Revised geologic map and structural interpretation of the Mineral King
           pendant, southern Sierra Nevada, California (USA): Evidence for
           kilometer-scale folding and structural imbrication of a Permian to
           mid-Cretaceous volcanosedimentary assemblage

    • Abstract: AbstractThe Mineral King pendant is an ~15-km-long, northwest-striking assemblage of Permian to mid-Cretaceous metavolcanic and metasedimentary rocks that form a steeply dipping wall-rock screen between large mid-Cretaceous plutons of the Sierra Nevada batholith (California, USA). Pendant rocks are generally well layered and characterized by northwest-striking, steeply dipping, layer-parallel cleavage and flattening foliation and steeply northwest-plunging stretching lineation. Northwest-elongate lithologic units with well-developed parallel layering and an absence of prominent faults or shear zones suggests a degree of stratigraphic continuity. However, U-Pb zircon dating of felsic metavolcanic and volcanosedimentary rocks across the pendant indicates a complex pattern of structurally interleaved units with ages ranging from 277 Ma to 101 Ma.We utilize a compilation of 39 existing and new U-Pb zircon ages and four reported fossil localities to construct a revised geologic map of the Mineral King pendant that emphasizes age relationships rather than lithologic or stratigraphic correlations as in previous studies. We find that apparently coherent lithologic units are lensoidal and discontinuous and are cryptically interleaved at meter to kilometer scales. Along-strike facies changes and depositional unconformities combine with kilometer-scale tight folding and structural imbrication to create a complex map pattern with numerous discordant units.Discrete faults or major shear zones are not readily apparent in the pendant, although such structures are necessary to produce the structural complications revealed by our new mapping and U-Pb dating. We interpret the Mineral King pendant to be structurally imbricated by a combination of kilometer-scale tight to isoclinal folding and cryptic faulting, accentuated by, and eventually obscured by, pervasive flattening and vertical stretching that preceded and accompanied emplacement of the bounding mid-Cretaceous plutons. Deformation in the Mineral King pendant represents a significant episode of pure-shear-dominated transpression between ca. 115 Ma and 98 Ma that adds to growing evidence for a major mid-Cretaceous transpressional orogenic event affecting the western U.S. Cordillera.
      PubDate: Wed, 10 Jul 2024 00:00:00 GMT
       
  • Continental-scale drainage reorganization during Mesoproterozoic
           orogenesis: Evidence from the Belt Basin of western North America

    • Abstract: AbstractThe Mesoproterozoic Belt Basin of the northwestern United States and southwestern Canada contains a 5–20-km-thick metasedimentary succession deposited during an important transition in the Precambrian development of North America. Key unresolved issues for the Belt Basin include the chronology of deposition, sources of siliciclastic sediment, and regional paleogeography during Laurentian orogenesis. To address these topics, we acquired detrital zircon U-Pb geochronologic data for eastern exposures of the Belt-Purcell Supergroup in the Lewis thrust salient along the USA-Canada border. To define an integrated chronostratigraphic and provenance framework for the Belt Basin, we calculated maximum depositional ages and qualitatively and quantitatively compared our geochronologic data set to a compilation of Laurentian igneous and metamorphic zircon U-Pb ages using multidimensional scaling and an inverse Monte Carlo model. The results suggest a stratigraphic age range of ca. 1495–1380 Ma, constituting a depositional duration of ~115 m.y. with an average sediment accumulation rate of ~40 m/m.y. for the studied locality (extrapolated to ~155 m/m.y. for the basin depocenter). Variations in sediment provenance are expressed by three distinct intervals within the Belt-Purcell Supergroup. The lower Belt Supergroup succession (Waterton to lower Helena Formations; ca. 1495–1440 Ma) is dominated by Paleoproterozoic and Archean grains derived from the northeastern Canadian Shield. The middle Belt Supergroup succession (upper Helena to Sheppard Formations; ca. 1440–1420 Ma) displays mixed early Mesoproterozoic, late Paleoproterozoic, and Archean zircon age groups. The upper Belt Supergroup succession (Gateway to Roosville Formations; ca. 1420–1380 Ma) contains almost entirely late Paleoproterozoic zircons sourced from the south (Yavapai-Mazatzal and Mojave crustal provinces). We interpret sediment provenance to reflect a continental-scale, fluvial drainage reorganization during middle Belt Supergroup deposition that can be linked to the recently recognized Picuris orogeny.
      PubDate: Wed, 10 Jul 2024 00:00:00 GMT
       
  • Joint flexural-density modeling of the Taltal, Copiapó, and Iquique
           hotspot ridges and the surrounding oceanic plate, offshore Chile

    • Abstract: AbstractBased on gravity and bathymetric data and using a novel two-dimensional joint flexural-density modeling approach, this work studies the physical properties of the oceanic Nazca plate around the Taltal, Copiapó, and Iquique hotspot ridges offshore northern Chile. The area is located westward of the Chilean Trench where the Taltal and Copiapó Ridges collide with the continental margin. The results show that the variability in density structure at different scales is a key factor in explaining the observed gravity signal, playing an important role in the lithospheric flexure and hence the elastic properties of the Nazca plate in this setting. The results can be interpreted as evidence of spatial and temporal heterogeneities in the plate-weakening process at the hotspots, magmatic underplating, and crustal and upper mantle fracturing and/or hydration. These processes might be relevant for the ascent of magma pathways of later (secondary) volcanism and influence the mechanical segmentation of the oceanic plate. The latter is critical in explaining the active seismogenic contact between the oceanic Nazca and overriding South America plates.
      PubDate: Wed, 03 Jul 2024 00:00:00 GMT
       
  • Maximum depositional ages and provenance analysis of the Precambrian
           Manyovu redbeds, Tanzania: Implications for Neoproterozoic tectonics

    • Abstract: AbstractThe Manyovu redbeds are an up to 600 m succession of fine-grained, siliciclastic strata in northwestern Tanzania and are part of the Neoproterozoic Bukoban Supergroup. Previous authors estimated the age of the Manyovu redbeds to be Neoproterozoic or older based on the K-Ar dates of underlying volcanic rocks (ca. 800 Ma). However, no other age constraints exist for these Neoproterozoic units. U-Pb detrital zircon results from six stratigraphic intervals of the Manyovu units, including both sandstone and siltstone samples, indicate maximum depositional ages as young as 614 ± 6 Ma, almost 200 m.y. younger than the underlying volcanics, with primary detrital contributions from Pan-African orogens, which indicates that these units are syn-tectonic accumulations associated with the assembly of Greater Gondwana/Pannotia. Detrital zircon spectra and modal compositions reveal that the sediment that formed these strata was sourced from a range of terranes, including continental blocks (i.e., Tanzania Craton), magmatic arcs (i.e., Mozambique Belt and Arabian-Nubian Shield), and recycled orogens (e.g., Ubendian-Usagaran belts). Together, these data indicate that the Manyovu redbeds accumulated following the Marinoan Snowball Earth event (ca. 635 Ma) and record the initiation of collision along the Mozambique Belt during Pan-African orogenesis and the formation of greater Gondwana.
      PubDate: Wed, 03 Jul 2024 00:00:00 GMT
       
  • Granitic mush compaction by impingement of a large felsic enclave:
           Evidence from the Aztec Wash pluton (Nevada, USA)

    • Abstract: AbstractCompaction and melt extraction are key processes in the generation of melt-dominated magma bodies. We analyze magmatic fabrics in the Aztec Wash pluton (15.7 Ma; Nevada, USA) to understand magma dynamics during emplacement of a large (2 m diameter) felsic enclave (LFE) in a silicic magma body. We hypothesize that the LFE moved through crystal-poor magma, settling into crystal-rich magma. We analyze four granite samples collected near the enclave: two 0.25 m below the enclave (E-5 and E-2); one 0.5 m below (E-6); and one 2.5 m to the side (E-3, far field). We use the scanning electron microscope (SEM) to gather data using backscattered electron (BSE) microscopy, energy dispersive spectroscopy (EDS), and electron backscatter diffraction (EBSD) imaging. BSE maps show large (up to 10 mm) euhedral alkali feldspar grains in E-5 and E-2, while E-6 and E-3 have large (up to 6 mm) alkali feldspar with distinct irregular and wavy rims. Dark BSE alkali feldspar rims correlate with Ba depletion in EDS maps. Broken feldspars in E-5 and E-2 have mismatched zones in BSE and orientation differences in EBSD. Grain orientation spread (GOS) maps show that alkali feldspar has the highest degree of intragrain deformation, followed by plagioclase, then quartz. Histograms of the angle between the vertical plane and the pole to the (010) plane demonstrate clustering in E-5, suggesting an enhanced fabric. Differences in rim texture suggest melt extraction beneath the enclave and melt retained in the far field. EBSD data reveal an enhanced foliation beneath the LFE. We conclude that mush under the LFE was deformed during emplacement of the LFE, expelling melt and reorienting grains.
      PubDate: Fri, 21 Jun 2024 00:00:00 GMT
       
  • Geological fingerprints of deep slow earthquakes: A review of field
           constraints and directions for future research

    • Abstract: AbstractSlow earthquakes, including low-frequency earthquakes, tremor, and geodetically detected slow-slip events, have been widely detected, most commonly at depths of 40–60 km in active subduction zones around the Pacific Ocean Basin. Rocks exhumed from these depths allow us to search for structures that may initiate slow earthquakes. The evidence for high pore-fluid pressures in subduction zones suggests that they may be associated with hydraulic fractures (e.g., veins) and with metamorphic reactions that release or consume water. Loss of continuity and resulting slip at rates exceeding 10−4 m s–1 are required to produce the quasi-seismic signature of low-frequency earthquakes, but the subseismic displacement rates require that the slip rate is slowed by a viscous process, such as low permeability, limiting the rate at which fluid can access a propagating fracture. Displacements during individual low-frequency earthquakes are unlikely to exceed 1 mm, but they need to be more than 0.1 mm and act over an area of ~105 m2 to produce a detectable effective seismic moment. This limits candidate structures to those that have lateral dimensions of ~300 m and move in increments of <1 mm. Possible candidates include arrays of sheeted shear veins showing crack-seal structures; dilational arcs in microfold hinges that form crenulation cleavages; brittle-ductile shear zones in which the viscous component of deformation can limit the displacement rate during slow-slip events; slip surfaces coated with materials, such as chlorite or serpentine, that exhibit a transition from velocity-weakening to velocity-strengthening behavior with increasing slip velocity; and block-in-matrix mélanges.
      PubDate: Tue, 28 May 2024 00:00:00 GMT
       
  • Multi-scale, open-system magmatic and sub-solidus processes contribute to
           the chemical and isotopic characteristics of the Jurassic Guadalupe
           Igneous Complex, Sierra Nevada, California, USA

    • Abstract: AbstractThe chemical and isotopic characteristics of a solidified pluton represent the integration of magmatic and sub-solidus processes operating across a range of spatial and temporal scales during pluton construction, crystallization, and cooling. Disentangling these processes and understanding where chemical and isotopic signatures were acquired requires the combination of multiple tools tracing processes at different time and length scales. We combine whole-rock oxygen and Sr-Nd isotopes, zircon oxygen isotopes and trace elements, and mineral compositions with published high-precision U-Pb zircon geochronology to evaluate differentiation within the bimodal Guadalupe Igneous Complex, Sierra Nevada, California (USA). The complex was constructed in ~300 k.y. between 149 and 150 Ma. Felsic magmas crystallized as centimeter- to meter-sized segregations in gabbros in the lower part of the complex and as granites and granophyres structurally above the gabbros. A central mingling zone separates the mafic and felsic units. Pluton-wide δ18O(whole-rock), δ18O(zircon), and Sr-Nd isotopic ranges are too large to be explained by in situ, closed-system differentiation, instead requiring open-system behavior at all scales. Low δ18O(whole-rock) and δ18O(zircon) values indicate assimilation of hydrothermally altered marine host rocks during ascent and/or emplacement. In situ differentiation processes operated on a smaller scale (meters to tens of meters) for at least ~200 k.y. via (1) percolation and segregation of chemically and isotopically diverse silicic interstitial melt from a heterogeneous gabbro mush; (2) crystal accumulation; and (3) sub-solidus, high-temperature, hydrothermal alteration at the shallow roof of the complex to modify the chemical and isotopic characteristics. Whole-rock and mineral chemistry in combination with geochronology allows deciphering open-system differentiation processes at the outcrop to pluton scale from magmatic to sub-solidus temperatures over time scales of hundreds of thousands to millions of years.
      PubDate: Fri, 17 May 2024 00:00:00 GMT
       
  • Magmatic conditions aiding synconvergent extension above the Peruvian flat
           slab

    • Abstract: AbstractThe Cordillera Blanca and Cordillera Huayhuash contain some of the highest topography in the Andes and provide insight into tectonomagmatic processes associated with the onset of flat-slab subduction. These adjacent ranges shared a similar history of deformation and exhumation prior to the late Miocene, when synconvergent extension began in the Cordillera Blanca. Magmatism in the Cordillera Huayhuash has been inferred as coeval with magmatism in the Cordillera Blanca. Yet, extension, which has been correlated with magmatic heat flow, is limited to the Cordillera Blanca. New zircon U-Pb dates and trace and rare earth element concentrations from the Cordillera Blanca batholith and the Huayllapa pluton in the Cordillera Huayhuash and reassessment of existing zircon data help to characterize regional magmatic processes prior to the establishment of flat-slab subduction. Two compositionally distinct samples of the Huayllapa pluton yielded mean ages of 24.8 ± 0.4 Ma and 25.4 ± 0.8 Ma. In contrast, the Cordillera Blanca batholith has a protracted crystallization history postdating that of the Cordillera Huayhuash by up to 20 m.y. Miocene magmatism in the Cordillera Blanca began at 19 Ma and ended with injection of large volumes of geochemically distinct, mantle-derived magma from 10 to 5 Ma. We suggest that 6–5 Ma magmatism in the Cordillera Blanca promoted elevated heat flow and reduced shear strength, which facilitated extensional shearing along the western slopes of the range, whereas colder amagmatic crust in the Cordillera Huayhuash inhibited southward propagation of faulting. Our data demonstrate that the linkages between magmatism and elevated heat flow identified in the Cordillera Blanca are important driving processes in initiating extension in cordilleran-style orogenies.
      PubDate: Fri, 17 May 2024 00:00:00 GMT
       
  • Early Oligocene record of an “iceberg alley” in the Weddell Sea from
           quartz sand microtextural analysis at ODP Site 696

    • Abstract: AbstractThe greenhouse to icehouse transition at the Eocene-Oligocene boundary (34 Ma) marked the appearance of continental-scale glaciation in Antarctica. The material recovered from Ocean Drilling Program Site 696 is the only record spanning this major climatic shift in the Weddell Sea region. Using scanning electron microscopy, quartz microtextures in 13 samples across the Eocene-Oligocene transition were analyzed to understand the degree of glacial modification and the transportation history of the >150 µm material. The quartz grains were visually grouped, characterized, and interpreted by grain outline, relief, and surface microtextures. Glacial textures are present throughout the entire interval (34.4–33.2 Ma), with the proportion of iceberg-rafted grains in each sample decreasing into the early Oligocene (33.6 Ma), accompanied by an increase in the frequency of eolian and sea-ice-rafted grains. Mass accumulation rates reveal that the flux of iceberg-rafted debris increased coincident with the flux of eolian and sea-ice-rafted grains following 33.6 Ma, suggesting a strong coupling between land-ice development and high-latitude atmospheric processes. When compared with other Antarctic climate proxy data sets, the intensification of ice rafting at Site 696 occurred after ice-sheet inception in East Antarctica. The prominent influx of terrigenous material after 33.6 Ma points to strengthened glacial conditions accompanied by major changes in the environment of the Weddell Sea region, supporting the idea of a high-latitude role in climate perturbations, in agreement with interpretations of other global proxies.
      PubDate: Tue, 14 May 2024 00:00:00 GMT
       
  • Assessing the geometry of the Main Himalayan thrust in central Nepal: A
           thermokinematic approach

    • Abstract: AbstractSince the 2015 Gorkha earthquake in Nepal, the relationship between the geometry of megathrusts and the control it exerts over the nucleation and propagation of major earthquakes has become an important topic of debate. In this study, we integrate new geologic mapping, a newly interpreted cross section from the Daraundi valley of central Nepal, two published cross sections from the neighboring Marsyangdi and Budhi Gandaki valleys, and a suite of 270 thermochronometric ages to create an integrated and validated three-dimensional kinematic model for the central Nepal Himalaya. We use this model to investigate the assertion that the westward propagation of the Gorkha rupture was restricted by deep-seated structures in the Main Himalayan thrust. The integrated kinematic model based on these cross sections indicates that the ~30 km southward step in the Main Central thrust system mapped in the Daraundi valley, along with the corresponding step in the distribution of reset muscovite (Ar-Ar) ages, is not the result of a lateral structure in the modern Main Himalayan thrust. Instead, the step in the surface geology is the result of a considerably shorter Trishuli thrust sheet in the Daraundi transect (~30 km compared to between 105 and 120 km in the other transects). The corresponding southward step in the distribution of reset muscovite Ar-Ar ages is the result of the Lesser Himalayan duplex being completely translated over the Main Himalayan thrust ramp, elevating and exposing rocks heated to >400 °C farther south in the Daraundi transect. Our integrated model also highlights the 10–15 km of out-of-sequence thrusting that occurs on the Main Central thrust system across central Nepal. Importantly, these out-of-sequence thrusts sole directly into the modern Main Himalayan thrust ramp, and, together with the distribution of reset zircon (U-Th)/He and apatite fission track ages, show that the modern ramp is distinctly linear from east to west, with no support for a lateral structure at the ramp or to the south.
      PubDate: Tue, 14 May 2024 00:00:00 GMT
       
 
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  Subjects -> GEOGRAPHY (Total: 493 journals)
Showing 1 - 200 of 277 Journals sorted alphabetically
40 [degrees] South     Full-text available via subscription   (Followers: 1)
AAG Review of Books     Hybrid Journal   (Followers: 2)
ACME : An International Journal for Critical Geographies     Open Access   (Followers: 3)
Acta Universitatis Lodziensis : Folia Geographica Socio-Oeconomica     Open Access   (Followers: 1)
Adam Academy : Journal of Social Sciences / Adam Akademi : Sosyal Bilimler Dergisi     Open Access   (Followers: 3)
Advances in Geosciences (ADGEO)     Open Access   (Followers: 20)
Advances in Statistical Climatology, Meteorology and Oceanography     Open Access   (Followers: 10)
Africa Spectrum     Open Access   (Followers: 18)
African Geographical Review     Hybrid Journal   (Followers: 2)
African Journal on Land Policy and Geospatial Sciences     Open Access   (Followers: 4)
Agronomía & Ambiente     Open Access   (Followers: 1)
AGU Advances     Open Access   (Followers: 16)
All Earth     Open Access   (Followers: 3)
American Journal of Geographic Information System     Open Access   (Followers: 14)
American Journal of Human Ecology     Open Access   (Followers: 12)
Amerika     Open Access   (Followers: 1)
Anales de Geografía de la Universidad Complutense     Open Access  
Annals of GIS     Open Access   (Followers: 31)
Annals of the American Association of Geographers     Hybrid Journal   (Followers: 48)
Antipode     Hybrid Journal   (Followers: 74)
Anuario     Open Access  
Applied Geography     Hybrid Journal   (Followers: 41)
Applied Geomatics     Hybrid Journal   (Followers: 4)
Ar@cne     Open Access  
Area Development and Policy     Hybrid Journal   (Followers: 2)
Asia Policy     Full-text available via subscription   (Followers: 6)
Asian Geographer     Hybrid Journal   (Followers: 5)
Asian Journal of Geographical Research     Open Access   (Followers: 2)
Atmospheric Measurement Techniques (AMT)     Open Access   (Followers: 20)
Atmospheric Measurement Techniques Discussions (AMTD)     Open Access   (Followers: 10)
Aurora Journal     Full-text available via subscription  
Australian Antarctic Magazine     Free   (Followers: 5)
Australian Geographer     Hybrid Journal   (Followers: 9)
Bandung : Journal of the Global South     Open Access   (Followers: 1)
Belgeo     Open Access   (Followers: 1)
Biblio3W : Revista Bibliográfica de Geografía y Ciencias Sociales     Open Access  
Biogeographia : The Journal of Integrative Biogeography     Open Access   (Followers: 2)
BioRisk     Open Access   (Followers: 2)
Boletim Goiano de Geografia     Open Access  
Boletín de Estudios Geográficos     Open Access  
Brill Research Perspectives in Map History     Full-text available via subscription   (Followers: 3)
Buildings & Landscapes: Journal of the Vernacular Architecture Forum     Full-text available via subscription   (Followers: 16)
Bulletin de la Société Géographique de Liège     Open Access  
Bulletin de l’association de géographes français     Open Access   (Followers: 1)
Bulletin of Geosciences     Open Access   (Followers: 11)
Bulletin of the Ecological Society of America     Open Access   (Followers: 5)
Bulletin of the Serbian Geographical Society     Open Access  
Caderno de Geografia     Open Access  
Cahiers Balkaniques     Open Access   (Followers: 2)
Cahiers Charlevoix : Études franco-ontariennes     Full-text available via subscription  
Cahiers franco-canadiens de l'Ouest     Full-text available via subscription   (Followers: 2)
California Italian Studies Journal     Full-text available via subscription   (Followers: 7)
Canadian Journal of Latin American and Caribbean Studies     Hybrid Journal   (Followers: 14)
Canadian Journal of Soil Science     Full-text available via subscription   (Followers: 12)
Cardinalis     Open Access  
Carnets de géographes     Open Access  
Cartographic Journal     Hybrid Journal   (Followers: 9)
Cartographic Perspectives     Open Access   (Followers: 2)
Cartographica : The International Journal for Geographic Information and Geovisualization     Full-text available via subscription   (Followers: 17)
Cartography and Geographic Information Science     Hybrid Journal   (Followers: 32)
Check List : The Journal of Biodiversity Data     Open Access   (Followers: 2)
China : An International Journal     Full-text available via subscription   (Followers: 22)
Climate and Development     Hybrid Journal   (Followers: 35)
Climate Change Economics     Hybrid Journal   (Followers: 52)
Comparative Cultural Studies : European and Latin American Perspectives     Open Access   (Followers: 9)
Computational Geosciences     Hybrid Journal   (Followers: 16)
Computational Urban Science     Open Access   (Followers: 2)
Confins     Open Access  
Creativity Studies     Open Access   (Followers: 6)
Critical Romani Studies     Open Access   (Followers: 1)
Cuadernos de Desarrollo Rural     Open Access  
Cuadernos de Geografía de la Universitat de València     Open Access  
Cuadernos de Investigación Geográfica / Geographical Research Letters     Open Access  
Cuadernos Inter.c.a.mbio sobre Centroamérica y el Caribe     Open Access   (Followers: 1)
Current Research in Geoscience     Open Access   (Followers: 6)
Dialogues in Human Geography     Hybrid Journal   (Followers: 23)
Didáctica Geográfica     Open Access  
DIE ERDE : Journal of the Geographical Society of Berlin     Open Access   (Followers: 1)
Documents d'Anàlisi Geogràfica     Open Access  
Earth System Governance     Open Access   (Followers: 4)
Earth Systems and Environment     Hybrid Journal   (Followers: 4)
East/West : Journal of Ukrainian Studies     Open Access  
Eastern European Countryside     Open Access   (Followers: 2)
Economic and Regional Studies / Studia Ekonomiczne i Regionalne     Open Access  
Economic Geography     Hybrid Journal   (Followers: 42)
Économie rurale     Open Access   (Followers: 3)
Ecosystems and People     Open Access   (Followers: 4)
Entorno Geográfico     Open Access   (Followers: 1)
Environmental and Sustainability Indicators     Open Access   (Followers: 7)
Environmental Science : Atmospheres     Open Access   (Followers: 3)
Environmental Science and Sustainable Development : International Journal Of Environmental Science & Sustainable Development     Open Access   (Followers: 14)
Ería : Revista Cuatrimestral de Geografía     Open Access  
Espacio y Desarrollo     Open Access  
Espaço & Economia : Revista Brasileira de Geografia Econômica     Open Access  
Espaço e Tempo Midiáticos     Open Access  
Estudios Socioterritoriales : Revista de Geografía     Open Access  
Ethnobiology Letters     Open Access  
Ethnoscientia : Brazilian Journal of Ethnobiology and Ethnoecology     Open Access  
Études internationales     Full-text available via subscription   (Followers: 1)
Études rurales     Open Access   (Followers: 2)
Études/Inuit/Studies     Full-text available via subscription  
European Bulletin of Himalayan Research     Open Access   (Followers: 9)
European Countryside     Open Access   (Followers: 1)
Evolutionary Human Sciences     Open Access   (Followers: 6)
Fennia : International Journal of Geography     Open Access   (Followers: 2)
Fire Ecology     Open Access   (Followers: 5)
Focus on Geography     Partially Free   (Followers: 5)
Forum Geografi     Open Access  
GEM - International Journal on Geomathematics     Hybrid Journal   (Followers: 1)
Genre & histoire     Open Access   (Followers: 4)
Geo : Geography and Environment     Open Access   (Followers: 10)
Geo-spatial Information Science     Open Access   (Followers: 8)
GeoArabia     Hybrid Journal  
Géocarrefour     Open Access   (Followers: 1)
Geochemistry, Geophysics, Geosystems     Full-text available via subscription   (Followers: 34)
Geochronometria     Open Access   (Followers: 1)
Geoderma Regional : The International Journal for Regional Soil Research     Full-text available via subscription   (Followers: 5)
Geoforum Perspektiv     Open Access   (Followers: 1)
Geografares     Open Access  
Geografisk Tidsskrift-Danish Journal of Geography     Hybrid Journal   (Followers: 3)
Geografiska Annaler, Series A : Physical Geography     Hybrid Journal   (Followers: 4)
Geographica Helvetica     Open Access   (Followers: 13)
Geographical Analysis     Hybrid Journal   (Followers: 11)
Geographical Education     Full-text available via subscription   (Followers: 2)
Geographical Journal of Nepal     Open Access  
Geographical Research     Hybrid Journal   (Followers: 12)
Geographical Review     Hybrid Journal   (Followers: 13)
Geographicalia     Open Access  
Géographie et cultures     Open Access   (Followers: 3)
Geography and Natural Resources     Hybrid Journal   (Followers: 10)
Geography and Sustainability     Open Access   (Followers: 5)
Geography Compass     Hybrid Journal   (Followers: 19)
GeoHumanities     Hybrid Journal   (Followers: 4)
GeoInformatica     Hybrid Journal   (Followers: 12)
Geoinformatics & Geostatistics     Hybrid Journal   (Followers: 10)
Geoinformatics FCE CTU     Open Access   (Followers: 5)
Geoingá : Revista do Programa de Pós-Graduação em Geografia     Open Access  
GeoJournal     Hybrid Journal   (Followers: 11)
GEOMATICA     Hybrid Journal   (Followers: 1)
Geomatics, Natural Hazards and Risk     Open Access   (Followers: 14)
GEOmedia     Open Access   (Followers: 1)
Geophysical Research Letters     Full-text available via subscription   (Followers: 236)
GeoScape     Open Access  
Geosciences Journal     Hybrid Journal   (Followers: 10)
Geosphere     Open Access   (Followers: 2)
Ghana Journal of Geography     Open Access   (Followers: 11)
Ghana Studies     Full-text available via subscription   (Followers: 15)
GIScience & Remote Sensing     Open Access   (Followers: 58)
Global Challenges     Open Access   (Followers: 2)
Global Sustainability     Open Access   (Followers: 5)
Globe, The     Full-text available via subscription   (Followers: 4)
GPS Solutions     Hybrid Journal   (Followers: 28)
Grafo Working Papers     Open Access  
HiN : Alexander von Humboldt im Netz. Internationale Zeitschrift für Humboldt-Studien     Open Access  
History of Geo- and Space Sciences     Open Access   (Followers: 2)
Huellas     Open Access  
Human Geography Journal     Open Access   (Followers: 4)
Hungarian Geographical Bulletin     Open Access  
IBEROAMERICANA. América Latina - España - Portugal     Open Access  
Imago Mundi: The International Journal for the History of Cartography     Hybrid Journal   (Followers: 21)
Indonesian Journal of Geography     Open Access   (Followers: 1)
Infrastructure Complexity     Open Access   (Followers: 5)
Interaction     Full-text available via subscription   (Followers: 3)
International Geology Review     Hybrid Journal   (Followers: 16)
International Indigenous Policy Journal     Open Access   (Followers: 15)
International Journal of Advanced Geosciences     Open Access   (Followers: 3)
International Journal of Applied Geospatial Research     Hybrid Journal   (Followers: 8)
International Journal of Bahamian Studies     Open Access   (Followers: 1)
International Journal of Cartography     Hybrid Journal   (Followers: 3)
International Journal of Disaster Risk Reduction     Hybrid Journal   (Followers: 21)
International Journal of Geographical Information Science     Hybrid Journal   (Followers: 56)
International Journal of Geoheritage and Parks     Open Access  
International Journal of Health Geographics     Open Access   (Followers: 8)
International Journal of Image and Data Fusion     Hybrid Journal   (Followers: 3)
International Journal of River Basin Management     Hybrid Journal   (Followers: 1)
InterSedes     Open Access   (Followers: 1)
Investigaciones Geográficas     Open Access  
Investigaciones Geográficas (Esp)     Open Access  
ISPRS International Journal of Geo-Information     Open Access   (Followers: 6)
Journal de la Société des Océanistes     Open Access   (Followers: 1)
Journal for the History of Environment and Society     Open Access   (Followers: 3)
Journal of Alpine Research : Revue de géographie alpine     Open Access  
Journal of Arid Land     Hybrid Journal  
Journal of Australian Studies     Hybrid Journal   (Followers: 5)
Journal of Borderlands Studies     Hybrid Journal   (Followers: 8)
Journal of Burma Studies     Full-text available via subscription   (Followers: 3)
Journal of Cape Verdean Studies     Open Access  
Journal of Cultural Geography     Hybrid Journal   (Followers: 19)
Journal of Developmental Entrepreneurship     Hybrid Journal   (Followers: 6)
Journal of Earthquake and Tsunami     Hybrid Journal   (Followers: 2)
Journal of Franco-Irish Studies     Open Access   (Followers: 1)
Journal of Geodesy and Geoinformation     Open Access   (Followers: 2)
Journal of Geographical Systems     Hybrid Journal   (Followers: 8)
Journal of Geography     Hybrid Journal   (Followers: 11)
Journal of Geography and Geology     Open Access   (Followers: 12)
Journal of Geography, Environment and Earth Science International     Open Access   (Followers: 1)
Journal of Geophysical Research : Atmospheres     Partially Free   (Followers: 191)
Journal of Geophysical Research : Biogeosciences     Full-text available via subscription   (Followers: 35)
Journal of Geophysical Research : Earth Surface     Partially Free   (Followers: 61)
Journal of Geophysical Research : Oceans     Partially Free   (Followers: 64)

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Heriot-Watt University
Edinburgh, EH14 4AS, UK
Email: journaltocs@hw.ac.uk
Tel: +00 44 (0)131 4513762
 


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