Oil & Gas Geology ›› 2006, Vol. 27 ›› Issue (3): 305-315.doi: 10.11743/ogg20060304

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Composite basin-and-range system and reformation of basin prototype in Indosinian-Yanshanian in South China

Wu Chonglong1,2, Du Yuansheng1, Mei Lianfu1, Zhou Jiangyu1, Kong Chunfang1   

  1. 1. China University of Geosciences, Wuhan, Hubei 430074;
    2. State Key Laboratory of Geological Process and Mineral Resources, Wuhan, Hubei 430074
  • Received:2006-05-17 Online:2006-06-25 Published:2012-01-16

Abstract:

Several basin-and-range systems of foreland-type were developed in Indosinian-Yanshanian in South China,and they became "a composite basin-and-range system" through mutual influence,interference and superimposition.Based on detailed analysis of the Upper Yangtze composite basin-and-range system,it is believed that the composite basin-and-range system has been formed through the closing of Paleotethys archipelagic ocean,the convergence and collision of multiple blocks and orogeny.The researches reveal that in the long-term evolution of basin-and-range coupling and composite evolution since Indosinian,Longmen Mountain,Daba Mountain,Jiangnan uplifted tectonic zone and their foreland basins have not only led to the formation of several composite basin-and-range systems but have also led to the final formation of the huge composite basin-and-range system with "three mountains and one basin",i.e.Longmen-Daba-Jiangnan uplift composite basin-and-range system,also called the Upper Yangtze composite basin-and-range system for short.After Indosinian-Early Yanshanian,the Upper Yangtze composite basin-and-range system,together with the other composite basin-and-range systems in South China,have entirely been reformed and finally resulted in the present complicated basin-and-range structures and appearances.

Key words: foreland basin, basin-and-range system, basin-and-ranges coupling, Palaeotethys, archipelagic ocean, South China

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