Geochemical Research and Genesis of Dolostones with Different Crystal Characteristics Occurring in the Upper Cambrian, Central Area of Tarim Basin

• 责任者：Chen Yongquan (Tarim Oilfield Company Exploration and Development Research Institute ; CNPC ; Korla 841000 ; China) ; Zhou Xinyuan
• 刊名：Acta Sedimentologica Sinica
• 出版年：2010
• 卷期：28(2)
• 关键词：白云岩 ; dolostone ; 岩石地球化学 ; lithogeochemistry ; 塔里木盆地 ; Tarim Basin
• 页码：p.209-218
• 图表：9 illus., 4 tables, 24 refs.
• 分类号：0803
• issnNo：ISSN1000-0550
• isbnNo：CN62-1038/P

In this paper, petrology and geochemistry methods were attempted to reveal the genesis of dolostones of the Upper Cambrian in the central area of Tarim Basin. The studied dolostones can be divided into “Cloudy center with bright rim” type of euhedral dolomite (CBED), “clean and light” type of euhedral dolomite (CLED) and “dirty section” type of euhedral/subhedral dolomite (DED or DSD). Conclusions were reached: 1) the crystallization of CBED can be divided into two stages, center stage and rim stage; 2) CLED is result of mixed water dolomitization; and 3) DED and DSD are results of dolomitization by evaporated seawater.