Geochemical Research on Straticulate Dolostone and Spatulate Dolostone in Lower Ordovician Strata of Well Tazhong-1, Tarim Basin, Xinjiang

详细信息   

• 责任者：Chen Yongquan (Tarim Oil Field Company Exploration and Development Research Institute ; Korla ; 841000 ; China) ; Zhou Xinyuan
• 刊名：Acta Geologica Sinica
• 出版年：2008
• 卷期：82(6)
• 关键词：白云岩 ; dolostone ; 塔里木盆地 ; Tarim Basin
• 页码：p.826-834
• 图表：7 illus., 2 tables, 38 refs.
• 分类号：0803
• issnNo：ISSN0001-5717
• isbnNo：CN11-1951/P

摘要

In this paper, the straticulate dolostone and spatulate dolostone in Lower Ordovician strata of Well Tazhong 1 were studied using petrologic and geochemical methods. The macroscopic conformation and microscopic structure of the straticulate dolostone and spatulate dolostone suggest that the dolostones formed in a high-energy environment, the low degree of order with average value of 0.6, consistent with previous values of dolostones in tidal platform, indicates that the studied dolostones might also be formed in tidal platform. Therefore, the straticulate dolostone and spatulate dolostones were rapidly formed by direct precipitation from vaporized seawater in tidal platform.