期刊
AMERICAN MINERALOGIST
卷 95, 期 11-12, 页码 1650-1656出版社
MINERALOGICAL SOC AMER
DOI: 10.2138/am.2010.3414
关键词
High-magnesian calcite; d(104); calcite; disordered dolomite; solid solution; Mg-Ca ordering in dolomite
资金
- NASA Astrobiology Institute [N07-5489]
- NSF [EAR-0810150, EAR-095800]
- U.S. Department of Energy [DE-SC0001929]
- Department of Geoscience, University of Wisconsin-Madison
- Geological Society of America
- ExxonMobil
- Directorate For Geosciences
- Division Of Earth Sciences [0958000] Funding Source: National Science Foundation
X-ray diffraction has been widely used in analyzing Ca-Mg carbonates. Compositions of biogenic and inorganic (Ca,Mg)CO3 crystals are often calculated by comparing their d(104) values with published empirical curves. However, previous studies suggested that these curves do not apply to very high-Mg calcite and disordered dolomite. Based on synthesized high-Mg calcite and disordered dolomite, a new empirical curve between values of magnesian calcite d(104) and MgCO3 content in the calcite-disordered dolomite solid-solution series is constructed. This new curve is consistent with the significant cell parameter changes accompanying the Mg-Ca cation disorder in dolomite, and it can help the characterization of the MgCO3 content of both natural and synthetic magnesian calcite and disordered dolomite, especially for the mineral mixtures that are not suitable for other analysis methods.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据