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在兴安-内蒙地区最新发现大量晚古生代生物礁,礁体规模宏大、特征明显、出露完全,在区域内串连成3条沿板块边缘延伸的礁链带.生物礁包括5种建造类型和造礁群落,分属4个造礁期,代表7种成礁环境.敖汉旗-赤峰礁链带为早石炭世晚期群体珊瑚-藻类联合造礁,属温暖浅海陆棚环境.西乌旗-北山礁链带包括3个造礁期,即晚石炭世早期、晚石炭世晚期-早二叠世和中二叠世晚期;建造类型多样,有群体珊瑚-藻类联合造礁、灰泥建隆和藻类造礁等,属温暖岛海环境.扎赉特旗-东乌旗礁链带为以苔藓虫为主造礁,证明西伯利亚板块南缘属冷水浅海环境.礁相地层相序发育复杂,分别显示板块边缘的碳酸盐台地和中间地块的碳酸盐-碎屑混合台地沉积.三条礁链带从东到西近乎平行排列,分别指示华北板块北缘、中间地块边缘和西伯利亚板块南缘,据此可以建立区内海西期大地构造框架.生物礁的造礁期从南到北依次变新,反映了华北板块与西伯利亚板块碰撞过程.区内各种礁相地层发育巨厚,见有大量残余沥青,上覆地层和同期异相地层为暗色岩系,测试达到良好烃源岩标准,证明该区内具有很好的油气勘探远景.
In the Xing’an-Inner Mongolia area, a large number of late Paleozoic reefs have been newly discovered, and the reefs are large in scale with obvious features and are fully exposed and are connected in series into three reef chain belts extending along the edge of the plate in the area. The reefs include five types of construction and The reef-forming communities belong to 4 reef-forming periods and represent 7 reef-forming environments. The Aohan Banner-Chifeng Reefs belt is a coral-reef-algae coral reef formed in the late Early Carboniferous, - The Beishan reef chain includes three reefs, namely, the Late Carboniferous Early, Late Late Carboniferous - Early Permian and Late Middle Permian; various types of construction, coral reef - algae reef formation, stucco construction Long and algae reef, etc., is a warm island sea environment.Zajian special flag - East Wujian reefs to reef-based reef mainly bryozoans, Siberian plate that the southern margin of the sea is a shallow water environment. , Respectively, showing the deposition of carbonate-clastic mixing platform between the carbonate platform and the middle block at the edge of the plate.The three reef chains are arranged in parallel from east to west, indicating the northern edge of North China plate, the edge of the middle block and the Siberian South of the plate, which can be established within the Hercynian area of the earth The framework of the reef reef reefs changed from south to north in sequence, which reflected the collision process between the North China Plate and the Siberian Plate.The various reefs and strata in the area developed extremely thick with a large amount of residual bitumen, overlying strata and the same period The phase strata are dark-colored rock series. The test met good source rock standards and proved that there is a good prospect of oil and gas exploration in this area.