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Interaction between subducted continental crust and the mantle |
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| Authors: | Shuguang Li Yonghong Nie S R Hart Zongqing Zhang |
| Institution: | 1. Department of Earth and Space Sciences, University of Science and Technology of China, 230026, Hefei, China 2. Woods Hole Oceanographic Institution, 02543, Woods Hole, MA, USA 3. Institute of Geology, Chinese Academy of Geological Sciences, 100037, Beijing, China |
| Abstract: | The syncollisional mafic-ultramafic rocks with Nb, Zr, Ti negative anomalies in the North Dabie terrane have Sr and Nd isotopic compositions with EMI features. Their low and variable initial eNd values ranging from ?2 to ?18 are similar to those of their gneissic country rocks and the ultrahigh-pressure metamorphic rocks in the South Dabie terrane. These Sr and Nd isotopic features are difficult to be interpreted by mantle metasomatism related to oceanic subduction or crust assimilation, but is best explained by the mantle metasomatism related to continental subduction. |
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