| 安徽铜陵天马山金硫矿床地质地球化学特征 |
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| 引用本文：杨秋荣,王金芳,冯景志,侯增谦,杨竹森,蒙义峰,王聪颖,陈文韬.2010.安徽铜陵天马山金硫矿床地质地球化学特征[J].地球学报,31(2):203-208. |
| DOI：10.3975/cagsb.2010.02.09 |
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| 基金项目:国土资源部科技专项研究项目(编号: B0002-3) |
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| 中文摘要:安徽铜陵天马山金硫矿床发育上部层状矿体和下部网脉状矿体, 地球化学特征呈现出明显的垂向变化和二元结构性。从下部网脉状矿化岩石到上部层状矿石, Pb、Zn、Au、Ag、As、Hg等含量和δ18O值总体逐渐增高, Cu、Mo、Cr、Co、Ni、REE等含量和成矿温度499℃→65℃及δ34S值总体呈逐渐降低趋势。黄铁矿的δ34S值为+4.0‰~+9.6‰, 上部层状块状矿石中方解石和石英的δ18O平均值为+13.7‰, 下部网脉状矿化岩矿石中脉石英或全岩δ18O平均值为+12.3‰。地质地球化学特征反映天马山金硫矿床为海底热水喷流沉积成因。 |
| 中文关键词:金硫矿床 二元结构 地质地球化学 安徽天马山 |
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| Geological and Geochemical Characteristics of the Tianmashan Au-S Deposit in Tongling, Anhui Province |
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| Abstract:The Tianmashan Au-S deposit is geochemically characterized by a vertical variation and a “two-member texture” as well as the development of the upper stratiform ore bodies and the lower disseminated-veinlet mineralized rocks (ores). Pb, Zn, Au, Ag, As, Hg content and average δ18O values increase progressively whereas Cu, Mo, Cr, Co, Ni, REE content, measured temperatures (from 499℃ to 65℃) of fluid inclusions and δ34S decrease gradually from the lower disseminated-veinlet mineralized rocks (ores) to the upper stratiform ore bodies. δ34S values of pyrite range from +4.0‰ to +9.6‰. The average δ18O value of calcite and quartz in the upper stratiform ore body is +13.7‰, while that of quartz and whole rock in the lower disseminated-veinlet mineralized rocks (ores) is +12.3‰. These geological-geochemical characteristics suggest that the Tianmashan Au-S deposit is of the submarine sedimentary exhalative origin. |
| keywords:Au-S deposit two-member texture geology-geochemistry Tianmashan in Anhui |
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