<SPAN lang=EN-US style="FONT-SIZE: 14pt; COLOR: black; mso-font-kerning: 18.0pt; mso-bidi-font-weight: bold"><FONT face="Times New Roman">Dedolomitization of Algal Dolomites of Middle Cambrian, Keping Area, <?xml:namespace prefix = st1 ns = "urn:schemas-microsoft-com:office:smarttags" /><st1:place w:st="on"><st1:PlaceName w:st="on">Tarim</st1:PlaceName> <st1:PlaceType w:st="on">Basin</st1:PlaceType></st1:place> <?xml:namespace prefix = o ns = "urn:schemas-microsoft-com:office:office" /><o:p></o:p></FONT></SPAN>

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Dedolomitization of Algal Dolomites of Middle Cambrian, Keping Area, Tarim Basin

详细信息

责任者：Wang Xiaolin (Department of Earth Sciences ; Nanjing University ; Nanjing 210093 ; China) ; Hu Wenxuan
刊名：Acta Mineralogica Sinica
出版年：2009
卷期：29(1)
关键词：白云岩 ; dolostone ; 藻灰岩 ; algal limestone ; 塔里木盆地 ; Tarim Basin
页码：p.56-62
图表：5 illus., 2 tables, 26 refs.
分类号：0803
issnNo：ISSN1000-4734
isbnNo：CN52-1045/P

摘要

The dedolomitization of algal dolomite of Middle Cambrian in the Keping area, Tarim Basin, is firstly reported in this work. Dedolomitization occurred only in the algal dolomite which has a high porosity, and only those algal dolomites which are adjacent to the gypsum sequences were dedolomitized. Dolomite residues can be found in the algal limestone and algal calcareous dolomite under BSE images, and they can be divided to two groups:arborization and mortary dolomite residues. The former has plenty of calcite inclusions and high Ca²⁺/Mg²⁺ ratios, the dedolomitization is relatively thorough, while the latter is relatively clear, and the Ca²⁺/Mg²⁺ ratios are near 1.

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