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The Dabie Orogen as the early Jurassic sedimentary provenance: Constraints from the detrital zircon SHRIMP U-Pb dating |
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| Authors: | |
| Institution: | 1. Institute of Geology and Geophysics,Chinese Academy of Sciences,Beijing,100029,China 2. Institute of Geology,Chinese Academy of Geological Sciences,Beijing,100037,China 3. Institute of Mineral Resources,Chinese Academy of Geological Sciences,Beijing,100037,China |
| Abstract: | The SHRIMP U-Pb ages of detrital zircon from the oldest Mesozoic strata, the Fanghushan Fomation, in the Hefei Basin range from 200 Ma to ca. 2500 Ma, which indicates that the Dabie Orogen as the early Jurassic sedimentary provenance was complex. The composition of the Dabie Orogen includes: the Triassic high pressure-ultrahigh pressure metamorphic rocks, of which the detrital zircon ages are from 234 Ma to 200 Ma; the rocks possibly related to the Qinling and Erlangping Groups representing the southern margin of the Sino-Korean craton in the Qinling and Dabie area, of which the detrital zircon has an age of 481-378 Ma; the Neo-proterozoic rocks originated from the Yangtze croton, of which the detrital zircon ages are 799-721 Ma old; and the rocks with the detrital zircon ages of ca. 2000 Ma and ca. 2500 Ma, which could be the old basement of the Yangtze craton. |
| Keywords: | Hefei Basin detrital zircon SHRIMP U-Pb dating Dabie Orogen |
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