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Considerable debate persists as to the tectonic setting of the Tianshan Orogen during the Late Paleozoic, with active subduction system and intraplate large igneous provinces as two dominant schools. With aims of providing constraints on this issue, geochronological and geochemical analyses have been carried out on the Late Carboniferous high-Al basaltic lava (HAB) from the Bogda Mountains. These...
Granitic magmas in three areas of southeastern Australia are the product of melting of quartzofeldspathic metasedimentary rock (high-silica end member) combined with varying degrees of incorporation of mafic (dominantly basaltic) magma (low-silica end member). The link between granitic magma and local metasedimentary rock is established by identifying shared geochemical signatures in Sr, Na 2...
Barren Island (BI) is a subduction-related volcanic island lying in the northeastern Indian Ocean, about 750 km north of the northern tip of Sumatra. Rising from a depth of ∼2300 m on the Andaman Sea floor, BI has a submarine volume estimated at ∼400 km 3 , but the island is just 3 km across, reaches a maximum elevation of 355 m, and has a subaerial volume of only ∼1.3 km 3 . The first...
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