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ON THE DISINTEGRATION, DISPLACEMENT, COLLISION AND CONVERGENCE OF PAN—CHINA PLATE AND EVOLUTION OF ITS OIL AND GAS BEARING BASINS
Zhang Kai
1991, 12 (2):
91-106.
The Pan—China Plate underwent evolution of superimpositions of three plate tectonic cycles- During late Proterozoic cycle, a Proterozoic continent was ever formed and converged to Pangaea of the globe. During early Palaeozoic cycle, both Proterozoic continent and Pangaea went through dispersion, displacement and sea floor spreading synchronously. The former was dispersed into five protocontinental segments. Xinjiang segment, north China segment, south China segment, Chaidamu segment and east China segment. They were all seperated by the narrow oceans. In Palaeozoic period, each of the segments that were all then in the vicinity of the equator were drifting northwards to low latitude belt. Qiangtang—Indo-Chinese protocontinent was disintegrated from the Gondwana during D,-C,when it drifted from southern hemisphere to the equator along with spreading of Palaeotcthys ocean crust.In late Palaeozoic period (T),main body of Pan —China plate was subjected to the Caledonian, Hersinian and Indosinian movements before they converged again, resulting in the formation of Eurasia continent. During early Mesozoic—Cenozoic cycle,south Tibetan—Indo protocontinent was disintegrated from the Gondwana, drifting toward the equator from southern hemisphere；east China protocontincnt was then evolved into the Philippine Sea plate which subducted to Pan-China plate with Pacific-Oceanic plate , during K2-N,, intense colJision, compression and continent —continent convergence took place between south Tibetan—Indo protocontincnt and southwestern Chinese continent .Because of the spread of north Atlantic Ocean and Indian Ocean, it made Pan-China plate drift and clockwise rotate northwards for hundreds of kilometers during Quaternary period.
It was the three cycles to Pan-China plate which underwent the dsintegration, displacement, collision and convergence that affected and controlled the evolution of the Iithofacies palaeogeography and generation evolution of oil and gas bearing basins of China .
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