Xinjiang Petroleum Geology ›› 2001, Vol. 22 ›› Issue (5): 448-451.

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Origin of Mesozonic Basins on the Northwest Pacific Margin and the North Tethys Margin

XU Jun-yuan, ZHANG Ling-yun   

  • Received:2001-03-21 Online:2001-10-01 Published:2020-09-27
  • About author:XU Jun-yuan(1960-), Male, Doctor, Petroleum Geology, Petroleum Department, China University of Geoscience, Wuhan, Hubei, 430074, China

Abstract: These problems related to origin of the Mesozoic basins on the northwest Pacific margin and the north Tethys margin are selected to be discussed. The results show that:① Tancheng-Lujiang (Tan-Lu) Fault was formed in Preterozoic era and large- scale sinistral parallel displacement occurred. It episodically reactivated as a dextral strike-slipping fault in Mesozoic, which is implied by tectonice style ( “fazy Z”shape) of Mesozoic rifts on its lateral flanks. ②Most of present paleomagnetic data contain many uncertainties and some of them contradict the basic geologic truth. So present paleomagnetic data cannot be used to reconstruct tectonics with a ltle higher precision.③seafloor spreading hypothesis contradicts some geological facts. Seafloor rift passove extension hypothesis,in which active drifts of continental and oceanic plates( blocks) are emphasized, is proposed to replace seafloor spreading hypothesis.

Key words: northwest, Pacifi, margin, Tancheng-Lujiang fault belt, paleomagnetism, seafloor spreading hypothesis

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