Water-sulfur-rich, oxidised adakite magmas are likely porphyry copper progenitors [PDF]
Scientific Reports, 2023 The world’s largest current Cu resource is volcanic arc-hosted, porphyry copper deposits. Whether unusual parental magmas or fortuitous combinations of processes accompanying emplacement of common parental arc magmas (e.g., basalt) is required for ore ...
Timothy S. J. Leong +2 more
doaj +3 more sources
Understanding subduction infancy to mature subduction in Southwest Japan via the self-consistent formation of a weak slab interface [PDF]
Scientific Reports, 2023 The weak slab interface controls long-term subduction dynamics. A weak hydrous layer at the slab interface promotes mechanical decoupling between the forearc mantle and the subducting slab and converts a hot forearc mantle to a cold mantle.
Changyeol Lee, YoungHee Kim
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High-Mg adakites from Kadavu Island Group, Fiji, southwest Pacific: Evidence for the mantle origin of adakite parental melts [PDF]
Geology, 2008 We report here the compositions of primitive high-Mg adakite lavas from the Kadavu Island Group, Fiji. Two distinctive high-Mg adakite compositions are present on Kadavu, and both are strongly enriched in Sr and La, with high Sr/Y (>120) and La/Yb (>30) values.
Leonid V. Danyushevsky +5 more
core +3 more sources
Petrogenesis of slab-derived trondhjemite–tonalite-dacite/adakite magmas [PDF]
Earth and Environmental Science Transactions of the Royal Society of Edinburgh, 1996 ABSTRACT:The prospect of partial melting of the subducted oceanic crust to produce arc magmatism has been debated for over 30 years. Debate has centred on the physical conditions of slab melting and the lack of a definitive, unambiguous geochemical signature and petrogenetic process.
M. S. Drummond +2 more
openaire +2 more sources
Magma storage and plumbing of adakite-type post-ophiolite intrusions in the Sabzevar ophiolitic zone, northeast Iran [PDF]
Solid Earth, 2015 Subduction-related adakite-type intrusive rocks emplaced into the late Cretaceous–Paleocene Sabzevar ophiolite zone, northeast Iran, range from Mg-andesite to rhyodacite in composition.
K. Jamshidi +4 more
doaj +3 more sources
Petrogenesis and geodynamic implication of the newly recorded Cryogenian Suwaj adakitic magmatism at the eastern Arabian-Shield [PDF]
Scientific ReportsRecent reconnaissance geochemical investigations have unveiled Cryogenian magmatism linked to the compressional accretionary phase, contributing to the growth of the Afif Terrane in the eastern Arabian Shield. The Cryogenian Suwaj intrusive suite, within
Mahmoud M. Hassan +10 more
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Geophysical Research Letters, 2023 K‐rich adakite‐like rocks (KARs) in post‐collisional settings, such as in Tibet, have been widely linked with the melting of pre‐existing thickened crust.
Wei Xu +6 more
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Unraveling the diversity of Arc volcanism and deep low-frequency tremors in Southwest Japan from numerical modeling [PDF]
Scientific ReportsDifferences in slab dehydration and fluid transport influence the distribution of magmatism and deep low-frequency tremors in subduction zones. Southwest Japan, particularly Kyushu and Shikoku/Chugoku, exhibits significant along-arc variation in the ...
Goeun Ha, Changyeol Lee, YoungHee Kim
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Protracted late Paleozoic volcanic arc activity along the Northeast Asian continental margin [PDF]
Scientific ReportsNortheast Asia is a complex tectonic collage bounded by Paleozoic–Mesozoic internal and peripheral orogens, whose distribution and continuity are obscured by later deformation and magmatic overprinting.
Hyeong Soo Kim +6 more
doaj +2 more sources