Alpine peak pressure and tectono-metamorphic history of the Monte Rosa nappe: evidence from the cirque du Véraz, upper Ayas valley, Italy [PDF]
Swiss Journal of Geosciences, 2021 The Monte Rosa nappe consists of a wide range of lithologies that record conditions associated with peak Alpine metamorphism. While peak temperature conditions inferred from previous studies largely agree, variable peak pressures have been estimated for ...
Joshua D. Vaughan-Hammon +3 more
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Original Calibration of a Garnet Geobarometer in Metapelite [PDF]
Minerals (Basel, Switzerland), 2019 In many metapelitic assemblages, plagioclase is either CaO-deficient or even absent. In such cases, all the widely applied, well-calibrated plagioclase-related geobarometers lose their usage. Fortunately, it has been found that a net-transfer reaction including intracrystalline Fe2+–Ca2+ exchange in garnet is pressure-sensitive, therefore, a garnet ...
Chun-Ming Wu
exaly +2 more sources
Extreme maldistribution of high field strength elements along subduction zones revealed by baddeleyite aggregates in serpentinite [PDF]
Scientific ReportsSerpentinization along subducting plates induces mechanical mixing of diverse rocks and interaction with compositionally distinct fluids, which is often accompanied by the formation of rare mineral species. In this study, newly discovered baddeleyites in
Hikaru Sawada +6 more
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Petrological diversity of continental arc magmatism evidenced by Triassic magmatic complexes in East Kunlun Orogen [PDF]
Scientific ReportsUnderstanding the petrogenetic relationships among the synplutonic dikes, magmatic enclaves and plutons in subduction zones provides key insights into the petrological diversity of arc magmatism.
Jie Gan +6 more
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Mineral chemistry and thermobarometry of Dorbeh diorite metamorphic aureole, south of Urmia [PDF]
پترولوژی, 2023 Hercynite-rich spinel is a typical mineral of both quartz-bearing and quartz-free metapelitic rocks that form under low-pressure high-temperature conditions in the granulite facies (Sengupta et al., 1991) or upper-amphibolite facies of regional and ...
Monir Modjarrad, Hadi Omrani
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Structural analysis and metamorphism of Palaeoproterozoic metapelites in the Seinäjoki-Ilmajoki area, western Finland [PDF]
Bulletin of the Geological Society of Finland, 1999 The Palaeoproterozoic Svecofennian bedrock of the Seinäjoki-Ilmajoki area, western Finland, is largely composed of porphyroblastic metapelites. In the area, the regional metamorphic grade increases towards the southwest.
H. Mäkitie
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Evolution of migmatitic granulite complexes: Implications from Lapland Granulite Belt, Part II: Isotopic dating [PDF]
Bulletin of the Geological Society of Finland, 2006 The migmatitic metapelites of the Lapland granulite belt (LGB) in the NE part of the Fennoscandian Shield represent an arc-related greywacke basin metamorphosed in the granulite facies. Detrital zircons from migmatitic metapelites are derived from 1.94 −
P. Tuisku, H. Huhma
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Mineralogy and thermobarometry of metamorphic basement from the Kabul Block (Eastern Afghanistan) [PDF]
پترولوژی, 2019 The cratonic basement in the Kabul district is dominated by gneiss, migmatite, schist, and amphibolite and is characterized by extensive outcrops. Orthopyroxene and garnet are the index minerals of some of the gneisse, hence, they are considered as ...
Ali Mohammad Ramezani +3 more
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Evolution of migmatitic granulite complexes: Implications from Lapland Granulite Belt, Part I: Metamorphic geology [PDF]
Bulletin of the Geological Society of Finland, 2006 The Palaeoproterozoic Lapland granulite belt was juxtaposed between Archaean and Proterozoic terrains in the NE part of the Fennoscandian Shield concurrently with the accretion of Svecofennian arc complexes at ~1.9 Ga.
P. Tuisku, P. Mikkola, H. Huhma
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Origin of tourmaline in micaschists of Gol-e-Gohar metamorphic complex from south-eastern Sanandaj-Sirjan Zone (Baft, Kerman Province) [PDF]
پترولوژی, 2018 In Gol-e-Gohar micaschists from south-east Sanandaj-Sirjan Zone (Kerman province), there are tourmaline crystals which are enriched in Mg and Na (Mg: 1.830 a.p.f.u and Na: 0.680 a.p.f.u), and so, they are dravite in compositions belonging to alkaline ...
Hosein Fatehi +2 more
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