Oil & Gas Geology ›› 2005, Vol. 26 ›› Issue (3): 310-316.doi: 10.11743/ogg20050308

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Genetic classification and distribution of Ordovician carbonate buried-hills in Huanghua depressionBohai Bay basin

Yang Minghui1, Wang Simin1, Chen Shanyong2, Ming Haihui1, Tang Xuan1   

  1. 1. Basin & Reservoir Research Center, China University of Petroleum, Beijing;
    2. Dagang Oilfield Company, PetroChina, Tianjin
  • Received:2005-03-20 Online:2005-06-25 Published:2012-01-16

Abstract:

Three types of Ordovician carbonate buried-hills can be identified in Huanghua depression,Bohai Bay basin.(1)Tilting fault-block buried-hills were developed during Himalayan transtensional movement and their formation was related with extension faulting,such as Xuhei,North Dagang and South Dagang buried-hills.(2)Bedding slip and thrust buried-hills were generally developed within fauh-blocks during the early Yanshanian and were related with the detachment faults and blind thrust faults within the Cambrian strata,such as Qianmiqiao and Kongxi buriedhills,as well as those developed within the Xuhei tilting fault-block.(3)Anticline buried-hills can be further divided into compressional anticline buried-hills and rollover anticline buried-hills,the former were formed during the transpression movement in early Yanshanian,such as Wumaying buried-hill,while the latter were developed in the hanging wall during the extension of Cangdong fault,such as Kongdian and Wangguantun buried-hills.The tilting fault-block buried-hills are distributed in the southeastern and northwestern parts of Huanghua depression,and are related to the extensional movements of Chengxi and Cangdong faults.The anticline buried-hills are distributed successively from north to south,including Kongdian,Junmazhan,Wangguantun and Wumaying,as well as Dongguang buried hills in south-central Huanghua depression.The detachment thrust buried-hills are mainly distributed within the tilting fault-blocks.The detachment thrusts are directed from SE to NW in south-central Huanghua depression, while those in the north are directed from NW to SE in sinistral transpression state.

Key words: carbonates, buried-hill, classification, distribution, Ordovician, Huanghua depression, Bohai Bay basin

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