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| Silicon Isotope Geochemistry of Micro—Fine Disseminated Gold Deposits in SW Guizhou and NW Guangxi,China | |
| 引用本文： | 刘显凡 倪师军 等. Silicon Isotope Geochemistry of Micro—Fine Disseminated Gold Deposits in SW Guizhou and NW Guangxi,China[J]. 中国地球化学学报, 1998, 17(3): 249-257. DOI: 10.1007/BF02834601 |
| 作者姓名： | 刘显凡 倪师军 等 |
| 作者单位： | OpenLaboratoryofOreDepositGeochemistry,InstituteofGeochemistry,ChineseAcademyofSciences,Guiyang,55000 |
| 摘 要： | Quartz was studied with respect to its silicon isotopic composition and cathodoluminescence in micro-fine disseminated gold deposits in SW Guizhou and NW Guangxi.The results showed that quartz in wall rocks.ores and that in association with hydrothermal silicification are distinctive in silicon isotopes and cathodoluminescence characters.Quartz in association with primary silicification is non-luminescent while that in wall rocks and associated with secondary silicification exhibits striking luminescence.Based on the dynamic fractionation of silicon isotopes,it is suggested that the mineralization was accompanied by rapid transport of aprimary siliceous fluid along the major deep fault system into subordinate faults before ore components deposited in favorable strata via penetration and metasomatism.Therefore,a deep origin is implicit for gold deposits of this type. |
| 关 键 词： | 硅同位素 阴极射线磷光 同位素示踪 中国 广西 贵州 金矿床 成矿作用 |
Silicon isotope geochemistry of micro-fine disseminated gold deposits in SW Guizhou and NW Guangxi, China |
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| Liu Xianfan,Ni Shijun,Lu Qiuxia,Jin Jingfu,Zhu Laimin. Silicon isotope geochemistry of micro-fine disseminated gold deposits in SW Guizhou and NW Guangxi, China[J]. Chinese Journal of Geochemistry, 1998, 17(3): 249-257. DOI: 10.1007/BF02834601 | |
| Authors: | Liu Xianfan Ni Shijun Lu Qiuxia Jin Jingfu Zhu Laimin |
| Affiliation: | (1) Open Laboratory of Ore Deposit Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, 550002 Guiyang;(2) Chengdu University of Technology, 610059 Chengdu |
| Abstract: | Quartz was studied with respect to its silicon isotopic composition and cathodoluminescence in micro-fine disseminated gold deposits in SW Guizhou and NW Guangxi. The results showed that quartz in wall rocks, ores and that in association with hydrothermal silicification are distinctive in silicon isotopes and cathodoluminescence characters. Quartz in association with primary silicification is non-luminescent while that in wall rocks and associated with secondary silicification exhibits striking luminescence. Based on the dynamic fractionation of silicon isotopes, it is suggested that the mineralization was accompanied by rapid transport of a primary siliceous fluid along the major deep fault system into subordinate faults before ore components deposited in favorable strata via penetration and metasomatism. Therefore, a deep origin is implicit for gold deposits of this type. This project was jointly granted by the “Eight Five-Year Plan” Gold Research Program initiated by the Chinese Academy of Sciences and the Open Lab. of Ore Deposit Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences. |
| Keywords: | silicon isotope cathodoluminescence of siliceous material isotopic tracing of the source of mineralization micro-fine disseminated gold deposit |
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