| TIMING OF COLLISION BETWEEN THE NORTH AND SOUTH CHINA BLOCKS——THE Sm-Nd ISOTOPIC AGE EVIDENCE |
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| 作者姓名： | 李曙光 S.R.HART 郑双根 刘德良 张国伟 郭安林 |
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| 作者单位： | Department of Earth and Space Sciences，University of Science and Technology of China，Hefei 230026，PRC，Center of Geoalchemy，Department of Earth，Atmospheric and Planetary Sciences，Massachusetts Institute of Technology，Cambridge，M A 02139，USA，Geological Team No. 313 of Anhui Province，Foziling，Department of Earth and Space Sciences，Uriversity of Science and Technology of China，Hefei 230026. PRC，Department of Geology，Northwest University，Xi'an 710069. PRC，Department of Geology，Northwest University，Xi'an 710069. PRC |
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| 摘 要： | Sm-Nd isotopic ages for C-type eclogite (243.9±5.6 Ma) and mafic and ultramafic rocks(230.6±30.7 Ma and 402.6±17.4 Ma) from the Qinling-Dabieshan orogenic belt are reported.These ages suggest that at the early Triassic, the North and South China Blocks have beenunited along the Qinling-Dabieshan collision zone, and before the final collision, a se-ries of ophiolite obductions took place successively away from the continental marginduring the Paleozoic.
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