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BSGF - Earth Sciences Bulletin
Scopus
ISSN 0037-9409 · EDP Sciences · 299 artikel di indeks
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Artikel Jurnal
Diapiric ridges and minibasins in the Central High Atlas: impact on geometries and facies distribution (Lower-Middle Jurassic, Morocco)
The Central High Atlas of Morocco is the result of the Alpine tectonic inversion of an intracontinental Mesozoic basin, the infill of which started with thick Upper Triassic clay and evaporite deposition. This slightly deformed mountain range is characterized by narrow ENE-WSW ridges that expose a…
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Artikel Jurnal
Post early Cretaceous evolution of the Cévenol fault system according to U-Pb geochronology
The Le Teil (Rhône Valley) earthquake of magnitude 4.9 on November 11, 2019, located on the Cévennes fault system has raised many questions about how regional intraplate structures may be reactivated and how they could potentially trigger strong and shallow earthquakes. This study aims to better…
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Artikel Jurnal
On the relations between morphotectonics, seismicity, perennial and sporadic hydrothermalism on the volcanic island complex of Milos (Greece)
The volcanic island complex of Milos, situated ∼200 km north of the Hellenic subduction zone, records the interplay of volcanic, tectonic, and gravitational processes within multidirectional, polyphased rift systems that developed throughout the Mio–Plio–Quaternary. Its active and seismogenic fault…
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Artikel Jurnal
Structural organization of the Lorraine coal basin and formation of the Alsting thrust fold
The Lorraine Coal Basin (LCB), filled with continental clastic formations of the Upper Carboniferous-Permian age, developed along the Metz-Hunsrück-Fault-Zone (MHFZ). Despite the structural studies, the structure of the basement which control the total sedimentary thickness variations, and the…
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Artikel Jurnal
The two-step scenario of the Messinian Crisis (Clauzon et al., 1996): a specification supported by new data
Many papers refer in a revised way to the two-step scenario of the Messinian Crisis conceived by Clauzon et al. (1996). The present paper recalls the basis for the two-step scenario and discrepancies with the later modified version, completed by new data supported by extensive micropaleontological…
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Artikel Jurnal
A long postglacial rhyolitic activity of the Icelandic Krafla volcano during the Eemian: limited impact of glacio-isostasy
Tephrostratigraphy in marine cores is an important tool for dating sedimentary sequences along the North Atlantic and in Western Europe. Most previously analyzed marine tephra were produced by Icelandic volcanoes, albeit rarely from the Krafla volcano, and require land-based records for validation…
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Artikel Jurnal
Geological and geomorphological controls on rocky shore platforms: insights from the basque coast, France
Rocky shore platforms are critical coastal landforms whose morphology reflects the interplay between geological inheritance, sea-level history, and erosional processes. While Sunamura’s (1992) classification distinguishes three main platform types (A, B, C), the detailed morphology of these…
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Artikel Jurnal
VirtualPal: a remote undergraduate invertebrate paleontology practical course using 3D fossils
Paleontology is a natural science discipline based on the observation of fossils. Therefore, paleontology education requires extensive training, and thus significant time, dedicated to observing and describing fossils. In the classroom, teachers often lack sufficient time to showcase the vast…
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Artikel Jurnal
Positive tectonic inversion of the Western Sicily margin: Geodynamic implications for the central sector of the Africa-Eurasia plate boundary
The offshore western Sicily region is located at the active Africa-Eurasia plate boundary, between the southern Tyrrhenian backarc basin and the African continental margin, where tectonic processes make this sector prone to strong earthquakes and tsunamis. In the area, positive inversion structures…
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Artikel Jurnal
Neoproterozoic magmatic accretion and Pan-African reworking-differentiation of mafic crust derived from an enriched mantle: evidences from structural analysis, petrology and geochemistry of the Ketté gold district (Eastern Cameroon)
The gold-rich Ketté formations belong to the Adamawa-Yadé block of the Neoproterozoic Central Africa Orogenic Belt. They consist of a complex association of tonalite, granodiorite, and heterogeneous granite including rafts of metapyroxenite, amphibolite, paragneiss and migmatite. Metapyroxenite and…
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Artikel Jurnal
20 years of seismic monitoring dedicated to the future French industrial centre for deep geological disposal (Cigéo)
The Cigéo project, led by the French National Radioactive Waste Management Agency (Andra), involves the future disposal of high-level and long-lived radioactive waste in a deep geological repository. The site is located between the departments of Meuse and Haute-Marne in north-eastern France. In…
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Artikel Jurnal
Sedimentary hints of seismic reflectors into an oolithic carbonate analogue reservoir study case on the “Oolithe Blanche” (Burgundy, France)
Although 3D and even 4D seismic imaging have advanced significantly, some acoustic patterns in carbonate reservoirs remain poorly understood. Diagenetic effects are still largely overlooked in interpreting reflectors within these complex sedimentary systems. We present a field study based on an…
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Artikel Jurnal
Control of lithospheric to crustal fault architecture on Cenozoic Rift geothermal systems (Upper Rhine, Bresse and Limagne, France)
Hydrothermal groundwater systems are key to renewable energy due to their high thermal efficiency. Effective geothermal resources require not only a heat source but also permeable geological formations and appropriate flow patterns. Fault zones, play a critical role in this process, potentially…
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Artikel Jurnal
Sub-continental lithospheric mantle beneath the Adamawa volcanic area (Cameroon Volcanic Line): inference from lavas and hosted mantle xenoliths from Bini Warack, NE-Ngaoundéré, Cameroon (Central Africa)
The sub-continental lithospheric mantle (SCLM) beneath the Cameroon Volcanic Line (CVL) is vertically and laterally heterogeneous, consisting of a complex mixing of DMM, HIMU, and EM1, affected by modal or cryptic metasomatism, depending on the area. The petrography, whole-rock geochemical data…
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Artikel Jurnal
Structural inheritance within the outer zones of arcuate collisional orogens: A case from the Central-Northern Apennine orogenic system
The evolution of fold-and-thrust systems developed at the expenses of pre-orogenic extensional basins is mainly achieved by reactivation, truncation of precursor structures, or by variable combination of these two distinct modes of propagation of compressional deformation during positive tectonic…
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Artikel Jurnal
Reconstructing alpine massifs paleoaltimetry using stable isotopic composition of fluid inclusions in quartz veins
We collected quartz veins and meteoric waters at alike altitudes on the Mont Blanc and the Chenaillet massifs in the French Alps to reconstruct the paleoaltimetry of these massifs. We analyzed 17 modern meteoric waters in total; the isotopic ratios of the MBM samples show a negative correlation…
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Artikel Jurnal
Rare-metal mineralization and crust-derived magmatism in a collisional orogen: the Variscan metallogenic odyssey of the Sioule region (French Massif Central)
The Sioule region in the northern part of the French Massif Central of the Variscan belt hosts the Echassières complex, where a large W(-Sn) quartz vein system was intruded by the Beauvoir rare-metal granite (RMG) hosting disseminated Sn, Nb-Ta and Li mineralization. We combined whole-rock…
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Artikel Jurnal
Neotectonic shortening and foreland structural evolution of the Malta Horst Cenozoic carbonate succession, Central Mediterranean
The Malta Horst is a NW–SE-trending, 30 km wide structural high situated on the southern Hyblean-Malta Plateau, which is an African continental indenter in collision with Eurasia. Sediments consist of a shallow marine carbonate platform succession (Mesozoic to Oligocene) capped by Miocene pelagic…
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Artikel Jurnal
Geochemistry and geochronology of the Palaeozoic mafic magmatism in the Codosera, Almadén and Guadalmez synclines, Central Iberian Zone, Spain
The Central Iberian Zone (CIZ) hosts several mafic suites showing variable geochemical affinities and signatures evolving through time. To provide a better understanding of magmatic processes, possible sources and the temporal evolution of the mafic magmatism in the CIZ, this work presents new…