| 秦岭与桐柏-大别山的构造关系——兼论河淮盆地的构造演化 |
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| 基金项目:“七五”项目 |
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| THE TECTONIC RELATIONSHIP BETWEEN THE QINLING MOUNTAINS AND TONGBAI-DABIE MOUNTAINS WITH NOTES ON THE TECTONIC EVOLUTION OF THE HEHUAI BASIN |
| Abundant microfossils have been found in the Nanwan Formation of the former Xinyang Group, which is consistant with the Devonian Liuling Group in the Qinling Mountains in age and sedimentary-structural characteristics. Also, abundant Early Paleozoic microfossils and a few corals have been discovered in the Erlangping Group, whose sedimentary sequence represents the process from sea-floor spreading to subduction of the ocean basin. The tectonic zones of the Qinling Mountains and the Tongbai-Dabie Mountains may link up one another, and the main suture zone is situated along Danfeng-Xinyang-Shucheng. It is the Guishan Formation of! the former Xinyang Group that is the strongly deformed pre-Devonian tectono-stratigraphic unit distributed in the main suture zone. The result of the systematic, isotopic dating clearly shows that the Qinling Mountains are a Caledonian, Variscan, Indosinian, and Yanshanian polycyclic composite orogen. The Sinian to Triassic sequence on the southern edge of the Sino-Korean platform has recorded the evolution of the Qinling orogen in different aspects of its process. The Cretaceous-Tertiary Hehuai basin was generated owing to the combined effect of the Tethys and Pacific Ocean dynamic systems. |
| NIU Bao-gui,LIU Zhi-gang,REN Ji-shun.1993.THE TECTONIC RELATIONSHIP BETWEEN THE QINLING MOUNTAINS AND TONGBAI-DABIE MOUNTAINS WITH NOTES ON THE TECTONIC EVOLUTION OF THE HEHUAI BASIN[J].Acta Geoscientica Sinica,14(1):1-13. |
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