新疆石油地质

新疆石油地质 ›› 2000, Vol. 21 ›› Issue (2): 120-122.

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塔里木盆地下奥陶统白云岩特征及成因

顾家裕   

  1. 中国石油天然气集团公司勘探开发科学研究院 北京 100083
  • 收稿日期:1999-06-14 出版日期:2000-03-01 发布日期:2021-01-15
  • 作者简介:顾家裕(1944- -),男,江苏人,教授级高级工程师,石油地质。

Characteristics and Origin Analysis of Dolomite in Lower Ordovician of Tarim Basin

Gu Jiayu   

  1. Professor of Engineering, Petroleum Geology, Research Institute of Petroleum Exploration and Development, CNPC, Beijing 100083
  • Received:1999-06-14 Online:2000-03-01 Published:2021-01-15

摘要： 在整个地质历史中,有两个白云岩分布的高峰期,即中生界和下古生界。塔里木盆地寒武一奥陶系白云岩按其结 构可分为七种类型,而且它们的碳氧同位素值也有较大的差异,微量元素的含量高低悬殊,包体均一温度差值幅度大, 充分反映其成因的差异。按其岩性特征、碳氧同位素值、微量元素的含量和成岩温度可分为准同生白云岩、浅埋藏白云 岩和深埋藏白云岩三类。

关键词: 塔里木盆地, 早奥陶世, 白云岩, 成因, 碳同位素, 氧同位素, 微量元素, 成岩演化

Abstract: There might be two major stages in dolomite distribution throughout geologic history of Tarim basin,that is, Mesozoic and Early Paleozoic, The dolomite of Cambrian-Ordovician could be clasified into seven types by its structures. The following big differences display its variations in origin, such as carbon and oxygen isotope value, trace element content and inclusion homogenization temperature range. Based on lithology, carbon and oxygen isotope value, trace element content and diagenetic temperature, it can also be classified as penecontemporaneous dolomite,shallow buried dolomite and deep buried dolomite.

Key words: Tarim basin, Early Ordovician, Dolomite, Orgin, Carbon isotope, Oxygen isotope, Trace element, Diagenetic evolution