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Abstract
It is generally considered that there are different continental compositions between a subductional– collisional and an accretionary orogen, however, what are the differences and how to identify them has not been well understood. This study attempts to discuss this problem by comparing Nd isotopic compositions of granitoids in the Qinling-Dabie orogen, a typical subductional-collisional orogen, with those in southwestern segment of the Central Asian Orogenic Belt (CAOB), the world's largest phanerozoic accretionary orogenic belt.
Highlights
It is generally considered that there are different continental compositions between a subductional– collisional and an accretionary orogen, what are the differences and how to identify them has not been well understood
This study attempts to discuss this problem by comparing Nd isotopic compositions of granitoids in the Qinling-Dabie orogen, a typical subductional-collisional orogen, with those in southwestern segment of the Central Asian Orogenic Belt (CAOB), the world's largest phanerozoic accretionary orogenic belt
Voluminous Paleozoic and Mesozoic granitoids in the Qinling Orogen have εNd(t) values from −21.9 to −10.9 in the southern margin of the North compositions between the Qinling-Dabie orogen (China) craton (NCC), from −14 to +5.4 in the North Qinling belt (NQB), from −10 to −1.8 in the South Qinling belt (SQB) and from −6.5 to –3.2 in the northern margin of the South China craton (SCC)
Summary
It is generally considered that there are different continental compositions between a subductional– collisional and an accretionary orogen, what are the differences and how to identify them has not been well understood. For citation: Wang X.X., Wang T., Ke C.H., Huang H., Tong Y., Yang Y., Hong D.W., 2017.
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