新疆柯坪中奥陶统沉积特征及其环境  

SEDIMENTARY ENVIRONMENT OF THE MIDDLE ORDIVICIAN, KEPING, XINJIANG

作　　者：孙庆峰[1] 宋春辉[2] 邵龙义[3] 罗文林[3] 

机构地区：[1]西北师范大学地理系 [2]兰州大学地质系,甘肃兰州730000 [3]中国矿业大学(北京)地质系,北京100083

出　　处：《新疆地质》2005年第2期111-116,共6页Xinjiang Geology

基　　金：西北师大青年科技资金(NWNUQN200432)资助

摘　　要：运用现代海洋学和古海洋学的最新理论,通过对中奥陶统沉积特征的详细分析和研究,认为中奥陶统的灰岩/ 泥岩交互沉积韵律层段是在风暴流和深海-半深海洋流的作用下形成的.中奥陶统主要为半深水陆棚沉积环境,并对其沉积相模式进行了详细的重建.Detailed study and analysis of the Middle Ordovician at Keping, Xinjiang shows the Middle Ordovician has rhythmically interbedded limestone and mudstone formed under the influence of the deep and semi-deep sea currents and the storm tides. Periodic currents moving towards the continent are influenced by shallow platform deposits and transport terrigenous deposits such as clay which influence carbonate production and periodically causes rhythmic limestone-mudstone deposition. The sedimentary environment is mainly semi-deep water shelf.

关 键 词：中奥陶统 沉积特征 新疆柯坪 沉积相模式 古海洋学 沉积环境 沉积韵律 新理论 风暴流 深海 深水 洋流 泥岩 灰岩 

分 类 号：P534.42[天文地球—古生物学与地层学] P618.130.2[天文地球—地质学]