Precise Naming and Mineralogical Characteristics of Ferruginous Lacustrine Dolomite in Well CCSD-SKoft-com:office:office" />

• 责任者：Gao Xiang (Laboratory Center of Geology ; China University of Geosciences ; Beijing 100083 ; China) ; Wang Pingkang
• 刊名：Acta Petrologica et Mineralogica
• 出版年：2010
• 卷期：29(2)
• 关键词：白云石 ; dolomite
• 页码：p.213-218
• 图表：3 illus., 3 tables, 11 refs.
• 分类号：0300
• issnNo：ISSN1000-6524
• isbnNo：CN11-1966/P

Using XRD and EPMA methods, the authors analyzed and studied mineralogical characteristics of dolostone samples. The main mineral in the samples should be named ferruginous dolomite rather than ankerite because the content of MgO is much higher than FeO. The XRD results of refined parameters for the crystal unit cell also show that the samples are of the rhomb-centered hexagonal crystal having space group of R3, the parameters of a, c, V values are larger than those of the standard dolomite and much closer to those of the standard ankerite, implying that the samples and the standard ankerite have the same crystal structure; however, there exists difference in the amount of Fe²⁺ and Mg²⁺ at the same structural position, and the value arising of axis and volume results from Fe²⁺ substitution of part of Mg²⁺ in the crystal structure. It is thus thought that ferruginous dolomite is a transitional species between dolomite and ankerite in the light of crystal structure.oft-com:office:office" />