| 江西上饶龙门高岭石-叶蜡石矿的矿物组成及稳定同位素特征 |
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| 关键词:mineralogy kaolinite pyrophyllite hydrothermal alteration hydrogen and oxygen isotope Jiangxi |
| 基金项目:教育部新世纪优秀人才支持计划(编号: NCET-07-0771) |
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| Mineral Components and Stable Isotope Compositions of the Longmen Kaolinite-pyrophyllite Deposit in Shangrao, Jiangxi Province |
| Based on field survey and microscope observations, the authors selected representative samples of the ores from the Longmen kaolinite–pyrophyllite deposit in Shangrao of Jiangxi Province to analyze mineral compositions by such means as electron microprobe analysis, X-ray powder diffraction and hydrogen and oxygen isotope analysis. The ores mainly consist of kaolin-group minerals (kaolinite, dickite), pyrophyllite and quartz with minor sericite, pyrite and hematite. Kaolin-group minerals are mainly relatively-disordered kaolinite with the Hinckley index varying between 0.33 and 0.94, and most of the pyrophyllites belong to 2M type. The δ18O and δD values of the ores range from 4.5‰ to 6.6‰ and from -71.7‰ to -98.5‰ respectively. It is suggested that the ore deposit was formed by replacement of tuff by hydrothermal fluids, which mainly came from the meteoric water. The formation temperature of the ore deposit was 75℃～300℃ and the ore-forming pressure was less than 1 kb. |
| YUAN Ye,SHI Guang-hai.2012.Mineral Components and Stable Isotope Compositions of the Longmen Kaolinite-pyrophyllite Deposit in Shangrao, Jiangxi Province[J].Acta Geoscientica Sinica,33(2):176-184. |
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