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- W2348696221 abstract "The Proterozoic volcanic rocks in South Qinling are dominated by basic volcanic rocks with SiO 2 45%～57% and acid volcanic rocks with SiO 2 67%～78%. The basic volcanic rocks with spilites and basalts as the major types are close to tholeiite series, whereas the acid rocks with quartz_keratophyre as the major type are close to calc_alkaline series. Both the basic and the acid volcanic rocks are enriched with REE, especially LREE, indicating that they were derived from different sources. Primitive mantle_normalized trace element patterns of the basic volcanic rocks exhibit the continental tholeiitic characteristics with highly_enriched incompatible elements and moderately_depleted Nb and Ti, suggesting that they were formed in the continental rift. According to the Sr_Nd isotopic study, the basic volcanism was closely related to the mantle plume upwelling. All the features demonstrate that the continental rift in South Qinling region was formed in Middle-Late Proterozoic, and the mantle plume activity was the precursor of the break_up of the ancient Qinling Ocean." @default.
- W2348696221 created "2016-06-24" @default.
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- W2348696221 date "2001-01-01" @default.
- W2348696221 modified "2023-09-23" @default.
- W2348696221 title "Proterozoic Intraplate Volcanic Rocks in South Qinling Mountains and Their Tectonic Implications" @default.
- W2348696221 hasPublicationYear "2001" @default.
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