石油与天然气地质 ›› 1992, Vol. 13 ›› Issue (3): 314-321.doi: 10.11743/ogg19920309

• 论文 • 上一篇    下一篇

山西临汾奥陶系石膏岩的成因及形成环境

王泽中, 翟永红   

  1. 江汉石油学院地质系 湖北 江陵 434102
  • 收稿日期:1989-10-12 修回日期:1990-07-04 出版日期:1992-09-25 发布日期:2012-01-16

ORIGIN AND DEPOSITIONAL ENVIRONMENT OF ORDOVICIAN GYPSUMS IN LINFEN,SHANXI PROVINCE

Wang Zezhong, Zhai Yonghong   

  1. Jianghan Petroleum Institute, Jiangling, Hubei
  • Received:1989-10-12 Revised:1990-07-04 Online:1992-09-25 Published:2012-01-16

PDF (PC)

411

被引次数

7

摘要：

山西临汾奥陶系石膏岩可分为原地沉淀型、异地沉积型、成岩交代型和脉状充填型四种。原地沉淀型石膏岩形成于浅水台地地势相对低洼的盐湖中;成岩交代型石膏岩形成在浅水台地地形相对隆起的部位,交代作用发生于大气淡水渗流带;异地沉积型石膏岩的形成环境介于低洼的盐湖和较高的隆起之间;脉状充填型石膏岩是充填在白云岩中的石膏脉,其形成与石膏-硬石膏相互转化时,脱水产生异常高压和吸水膨胀有关。

关键词: 山西临汾, 奥陶系, 石膏岩

Abstract:

The Ordovician gypsums in Linfen,Shanxi Province,can be divided into four types,namely autochthonous precipited,allochthonous deposited,diagenetic replaced and veinfilledtypes.Theautochthonousgypsum includinglaminated gypsum,banded gypsum and massive gypsum,which were formed by chemical precipitation in saline water depressions of shallow platform.The diagenetic replaced gypsum contains stromatolitic gypsum,oolitic gypsum and nodular gypsum which were formed in the uplift of the shallow platform and occurred in vadose zone during the penecontemporaneous stage.The allochthonous de-posited gypsum includes rudaceous gypsum and edgewise gypsum formed in places be-tween the depressions and the uplifts.The vein-filled gypsum was formed in transforma-tion process of gypsum and anhydrite related to abnormal high pressure resulted from de-hydration and the absorbing expansion.