Strong Physical Contrasts Across Two Mid‐Lithosphere Discontinuities Beneath the Northwestern United States: Evidence for Cratonic Mantle Metasomatism [PDF]
AGU Advances, 2023 Mid‐lithosphere discontinuities are seismic interfaces likely located within the lithospheric mantle of stable cratons, which typically represent velocities decreasing with depth.
Tianze Liu, Emily J. Chin, Peter Shearer
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Low‐Degree Melt Metasomatic Origin of Global Upper Mantle Fe Isotope Fractionation
Geophysical Research Letters, 2023 The upper mantle is heterogeneous in Fe isotope compositions, but the origin of the heterogeneity needs understanding. Recent studies on oceanic basalts demonstrate that the upper mantle Fe isotope heterogeneity results from low‐degree melt metasomatism.
Pengyuan Guo +7 more
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Secondary processes in the Achimov Formation sandstones on the example of the Ach 18-1 productive level of Yamburg area (Western Siberia) [PDF]
Нефтегазовая геология: Теория и практика, 2022 Analytical data interpretation of from studies of four wells Ach-18 productive level from Yamburg area made it possible to identify a sequence of staged secondary processes in clastic rocks and evaluate their role in the formation of reservoir properties.
Tugarova M.A. +2 more
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Sediment-Peridotite Reaction Controls Fore-Arc Metasomatism and Arc Magma Geochemical Signatures
Geosciences, 2021 Subduction of oceanic crust buries an average thickness of 300–500 m of sediment that eventually dehydrates or partially melts. Progressive release of fluid/melt metasomatizes the fore-arc mantle, forming serpentinite at low temperatures and phlogopite ...
Michael W. Förster +6 more
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On reasons of specific composition of the Keivy domain rocks (the Kola Peninsula) [PDF]
Vestnik MGTU, 2017 The Keivy domain differs from the other structures of the Kola region by the specific composition of the metamorphic complexes, the presence of the oldest for the region alkaline granites and gabbroanorthosites associated with them as well as by the ...
Kozlov N. E. +4 more
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Hydrothermal alteration in the lower part of an early Proterozoic greenstone complex at Palovaara, Enontekiö, northwestern Finland [PDF]
Bulletin of the Geological Society of Finland, 1988 The lower part of the early Proterozoic greenstone complex at Palovaara, northwestern Finnish Lapland, comprises a quartzite formation overlain by intermediate and felsic tuffs and tuffites with some lava flows, mostly intermediate in chemical ...
P. Eilu, H. Idman
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Boletín Geológico, 2020 The products of metasomatic alteration (e.g., carbonation) of peridotites are called listvenites. Based on a description of the outcrops in the laterite deposit at Cerro Matoso located in the NW of Colombia, the mineralogical composition confirmed by ...
Andrés Castrillón, Javier Guerrero
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Palaeoproterozoic prograde metasomatic-metamorphic overprint zones in Archean tonalitic gneisses, eastern Finland [PDF]
Bulletin of the Geological Society of Finland, 1999 Several occurrences of coarse-grained kyanite rocks are exposed in the Archaean area of eastern Finland in zones trending predominantly northwest-southeast that crosscut all the Archaean structures and, locally, the Palaeoproterozoic metadiabase dykes ...
M. Pajunen, M. Poutiainen
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Geochemistry, Geophysics, Geosystems, 2022 Constraints on the structure of cratonic lithosphere are essential to improve our understanding of craton formation, evolution and long‐term stability.
Isabella Altoe +2 more
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Kuangchan zonghe liyong, 2022 Bengge alkaline igneous complex in Zhongdian, Western Yunnan has the variety of rock types, which is production after a complex magma—fluid process. The petrographical and mineralogical analysis of the host rock and its xenolith suggests that the igneous
Yupeng Huang +6 more
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