Whole-rock Sm-Nd,Rb-Sr and zircon Pb-Pb dating of the metamorphic complex in the interior of qinling orogenic belt,western Henan,and their implications with regard to crustal evolution |
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| Authors: | Nengsong Chen Yujing Han Zhendong You Min Sun |
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| Institution: | (1) China University of Geosciences, 430074 Wuhan;(2) Institute of Geology, Academia Sinica, 100021 Beijing |
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| Abstract: | The comprehensive results of whole-rock Sm-Nd and Rb-Sr and zircon Pb-Pb dating suggest that the Qinling Group in the Qinling
orogenic belt, northwestern Henan was formed at about 1200 Ma. The complex in the interior of the orogenic belt experienced
strong reworking in response to two great thermal cycles — the Jinningian and Caledonian cycles. Further disintegration of
the Qinling Group delineated at present seems highly possible. |
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