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THE DISCOVERY OF archaeozoic ZIRCONS FROM MANTLE-DERIVED GRANITOIDS IN EAST TIANSHAN CALEDONIAN OROGENIC BELT AND ITS GEOLOGICAL SIGNIFICANCE

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Chinese Science Bulletin 1992年第22期37卷 1903-1905页

作者：郭继春胡受奚顾连兴 Department of Earth Sciences Nanjing University Nanjing 210008 PRC

From south to north, the eastern part of Tianshan Mountains situated between the Tarim and Junggar basins can be divided into the Middle Proterozoic orogenic zone, the Caledonian orogenic zone and the Hercynian orogenic zone successively. Detailed studies show that the Caledonian orogenic zone is an accretionary one at continental margin which evolved from the Andean-type to the Pacific-type active continental margin in the northern fringe of the Tarim plate during the Caledonian cycle and was finally formed following

关键词： archaeozoic zircon east Tianshan Mountains

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Division and identification of vertical reservoir units in archaeozoic metamorphic buried hill of Bozhong Sag,Bohai Bay Basin,East China

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Petroleum Exploration and Development 2022年第6期49卷 1282-1294页

作者： YI Jian LI Huiyong SHAN Xuanlong HAO Guoli YANG Haifeng WANG Qingbin XU Peng REN Shuyue College of Earth Sciences Jilin UniversityChangchun 130061China Tianjin Branch of China National Offshore Oil Company Ltd. Tianjin 300452China

Based on the data associated with cores,sidewall cores,casting thin sections,reservoir physical properties,conventional logging and imaging logging,the classification schemes of vertical reservoir units are proposed for the two types of archaeozoic buried hills(exposed and covered ones)in the Bozhong Sag,Bohai Bay *** geological characteristics and storage spaces of these reservoir units are described,and their identification markers in conventional and imaging log curves are *** archaeozoic metamorphic buried hills can be vertically classified into two primary reservoir units:weathering crust and inner buried *** weathering crust contains four secondary units,i.e.,the clay zone,weathered glutenite zone,leached zone,disaggregation zone;and the interiors contain two secondary units,i.e.,interior fracture zone and tight *** particular,the inner fracture zone was further divided into cataclasite belts and dense-fracture *** is proposed that the favorable reservoirs of exposed archaeozoic metamorphic buried hills are mainly developed in four parts including weathered glutenite zone,leached zone,disintegration zone superposed with the cataclasite belt and the cataclasite belt of inner fracture zone,and are controlled by both weathering and tectonic *** reservoirs in covered archaeozoic metamorphic buried hills are mainly developed in the weathering crust superposed with the cataclasite belts and the cataclasite belts of inner fracture zone,and are mainly controlled by tectonic actions.

关键词： Bohai Bay Basin Bozhong Sag archaeozoic metamorphic buried hills reservoir units logging identification

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