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Late Devonian (ca. 370Ma) volcanic rocks provide important information about the nature of magmatism during the tectonic transition between the Early and Late Paleozoic in the Beishan orogen, southern Central Asian Orogenic Belt. They are predominantly an andesitic–dacitic–rhyolitic assemblage, characterized by alkali contents ranging from slightly calcic to slightly alkaline. The rhyolitic rocks...
Mafic dike–granitoid associations are common in extensional tectonic settings and provide important opportunities for understanding mantle and crust melting during the tectonic evolution of host orogenic belts. We report results of petrologic, whole rock geochemical, Sr–Nd isotopic data and in situ zircon U–Pb and Hf isotopes for a mafic dike–granitoid association from the Zhongyangchang pluton in...
During the Mesozoic–Cenozoic, northward Neotethyan subduction and subsequent India–Asia collision gave rise to the extensive Transhimalayan magmatism that stretches from Burma and western Yunnan through southern Tibet to the Ladakh and Kohistan complexes. To understand the age distribution and petrogenesis of the Gangdese batholith, the largest intrusive exposure along the Transhimalayan magmatic...
Geochronological, geochemical, whole-rock Sr–Nd and zircon Hf isotopic analyses have been carried out on two suites of Late Mesozoic mafic to felsic magmatic rocks in the Sulu orogenic belt (east-central China) with the aim of characterizing their petrogenesis and tectonic implications. The Shijiusuo monzogranite has a SHRIMP zircon 206 Pb/ 238 U age of 127±2 Ma and an 40 Ar/...
The Emeishan flood basalt is a large igneous province erupted during the Permian-Triassic period in southwestern China. Based on petrographic, major and trace element, and Sr-Nd isotope data, the Emeishan basalts can be classified into two major magma types. These are: (1) a low-Ti (LT) type that exhibits low Ti/Y (<500), Fe 2 O 3 * (<12%), Nb/La (0.6-1.4), Nd (t)...
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