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
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 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
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
doaj +2 more sources
Petrographic and petrogenetic studies of adakitic magmatism of Gavdel (Shivar Dagh) in Garehdagh-South Arminian Zone (Northwest of Iran) (Irankuh Pb-Zn deposit, Southwest of Isfahan) [PDF]
پترولوژی, 2017 Gavdel intrusive body, situated in NW Iran and NE of Uromieh-Dokhtar zone, is a part of Garehdagh, South-Arminian Zone (Arasbaran). The major outcrops of intrusive include of granodiorite, monzonite accompanied with granodioritic dyke.
Ahmad Jahangiri, Hossien Bahmodinia
doaj +1 more source
Geochemistry and petrogenesis of Eocene shoshonitic and adakitic volcanic rocks in Sonajeel area (Southeast of Heris, Eastern Azerbaijan) [PDF]
پترولوژی, 2018 The studied area is located in the SE of Heris (Eastern Azerbaijan province) and the Alborz-Azerbaijan structural zone. The Eocene volcanic rocks in the area of under study show various compositions ranging from olivine basalt, hornblende basalt ...
Nasibeh Nemati +2 more
doaj +1 more source
New insights on the geochemical affinity and age of mineralized rocks in Timok magmatic complex, East Serbia [PDF]
Geološki Anali Balkanskoga Poluostrva, 2023 Bor and Čukaru Peki are world-class porphyry deposits spatially and genetically associated with the Cretaceous Timok magmatic complex. This research was conducted to determine the age and geochemical affinity of the magmatic rocks that formed these ore ...
Velojić Miloš +6 more
doaj +1 more source
Partial melting of slab window margins: genesis of adakitic and non-adakitic magmas
Lithos, 2005 Abstract When a mid-ocean spreading ridge subducts, it typically splits apart at depth to form two tapered slab edges separated by asthenospheric mantle within a slab window. We examine the fate of the slab edges using simplified slab window geometries, specific thermal parameters, and assumptions regarding shear stress and slab hydration.
Derek J. Thorkelson +1 more
+8 more sources
Journal of Economic Geology, 2021 Introduction About 75% of world copper, 50% of molybdenum, and 20% of gold are produced from porphyry copper deposits (Sillitoe, 2010) with an average ore grade of 0.45–1.5% Cu, 0.007–0.04% Mo and up to 1.5 ppm Au.
Mohammad Hassan Karimpour +3 more
doaj +1 more source
Palaeoproterozoic adakite-and TTG-like magmatism in the Svecofennian orogen, SW Finland [PDF]
, 2022 The Palaeoproterozoic Svecofennian orogen in the Fennoscandian shield is an arc accretionary orogen that was formed at c. 1.92-1.86Ga. Arc accretion, magmatism and the subsequent continent-continent collision thickened the crust up to c. 70km, forming
Hölttä P +4 more
core +3 more sources