Geochemical and Pb-Sr-Nd isotopic compositions of granitoids from western Qinling belt: Constraints on basement nature and tectonic affinity

Authors :: Zhou Lian
Jin Lanlan
Nigel Harris
Zhang Benren
Zhang Li
Zhang Hongfei
Hu Shenghong
Source :: Science in China Series D: Earth Sciences. 50:184-196
Publication Year :: 2007
Publisher :: Springer Science and Business Media LLC, 2007.
Abstract: Geochemical and Pb-Sr-Nd isotopic compositions of five Indosinian granitoid intrusions from the western Qinling belt provide insights into basement nature and tectonic affinity. The results show that the western Qinling granitoids incline towards basic in their bulk chemical composition. The granitoids belong to high-K to shoshonitic series with K2O/Na2O=1.04–1.86 and are dominantly metaluminous with A/CNK=0.90–1.05 (most samples have A/CNK of

Subjects :: Tectonics
Radiogenic nuclide
Basement (geology)
Proterozoic
Magma
Phanerozoic
Partial melting
Geochemistry
General Earth and Planetary Sciences
Sedimentary rock
Petrology
Geology

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