新疆石油地质

›› 2013, Vol. 34 ›› Issue (5): 1-1.

• 论文 •    

准噶尔盆地风城地区二叠系白云岩化模式

尹 路1，瞿建华2，祁利祺2，陈永波1，许多年1，王 斌1   

  1. (1.中国石油 勘探开发研究院 西北分院,兰州 730020;2.中国石油 新疆油田分公司 勘探开发研究院,新疆 克拉玛依 834000)
  • 出版日期:2019-01-01 发布日期:1905-07-13

Lacustrine Dolomitic Pattern of Permian in Fengcheng Area in Northwestern Margin of Junggar Basin

YIN Lu1, QU Jianghua2, QI Liqi2, CHEN Yongbo1, XU Duonian1, WANG Bin1   

  1. (1.Northwest Branch, Research Institute of Petroleum Exploration and Development, PetroChina, Lanzhou, Gansu, 730020, China; 2.Research Institute of Exploration and Development, Xinjiang Oilfield Company, PetroChina, Karamay, Xinjiang 834000)
  • Online:2019-01-01 Published:1905-07-13

PDF

228

摘要： 准噶尔盆地西北缘风城地区发现陆相湖盆白云质岩，其白云石含量为15%~80%，平均含量24%，与典型白云岩在岩石成分和成因机制上存在较大的差异。通过白云质岩的岩矿特征、古生物特征及地球化学特征的研究，认为风城组的白云石形成于较高盐度、高镁钙质量比、强还原的沉积环境，纹层状白云质岩形成于准同生期；夏子街组、乌尔禾组白云石镁离子来源于深部热液，由热液中的镁离子对早期碳酸盐胶结物中的钙离子的交代作用而形成。

Abstract: The terrestrial lacustrine dolomite with dolomite content ranging from 15%~80% and 24% in average was found in Fengcheng area in northwestern margin of Junggar basin, which belongs to dolomitic rock or dolomite?contained rock, being greatly different from the typical dolomite in rock composition and genetic mechanism. Based on the rock?mineral, paleontological and geochemical characteristics of the dolomitic rocks, it is suggested that the dolomite of the Fengcheng formation was formed in the sedimentary environment with highsalinity, high Mg/Ca ratio and strong reduction. The laminated dolomite was formed in the penecontemporaneous period; while the dolomites in Xiazijie formatin and Wuerhe formation were formed by the fact that their magnesium ions were originated from the deep hydro?therm and the metasomatism caused with calcium ion in the early carbonate cements

中图分类号: