| 广西高龙微细浸染型金矿床同位素地球化学研究 |
| 点此下载全文 |
| 引用本文：张永忠,李蘅,刘悟辉,徐文炘,戴塔根.2008.广西高龙微细浸染型金矿床同位素地球化学研究[J].地球学报,29(6):697-702. |
| DOI：10.3975/cagsb.2008.06.06 |
| 摘要点击次数: 2718 |
| 全文下载次数: 4098 |
|
| 基金项目:国家科技支撑计划(编号:2006BAB01B00) |
|
| 中文摘要:对广西高龙微细浸染型金矿床矿石和脉石矿物进行硫、铅、氢、氧同位素测定,获得沉积岩中黄铁矿的δ34S为-15.3‰～+13.6‰,含矿层中的黄铁矿δ34S值为+0.4‰～+15.6‰,硅质岩中黄铁矿的δ34S为+1.7‰～+9.7‰,硅质岩中辉锑矿的δ34S值为-15.3‰～+0.1‰.从含矿层到硅质岩的黄铁矿,再到硅质岩的辉锑矿,硫同位素组成有降低趋势.黄铁矿的206Pb/204Pb值为8.270～18.470;207Pb/204Pb值为5.620～15.710;208Pb/204Pb值为8.310～38.740.矿床石英的氧同位素为+11.3‰～+23.9‰,水的氧同位素为-4.2‰～+14.4‰,矿物包裹体的氢同位素为-53.4‰～-77.1‰,方解石的氧同位素为+10.5‰～+18.6‰,换算成水中氧同位素为-3.2‰～+10.7‰,氢同位素为-54.5‰～-30.5‰,表明热液可能来源于岩浆热液与大气降水和海水混合. |
| 中文关键词:同位素 微细浸染型金矿 广西高龙 |
| |
| Isotope Geochemistry of the Gaolong Micro-disseminated Gold Deposit in Guangxi |
|
|
| Abstract:S,Pb,H and O isotopic determinations of the ore and gangue minerals in the Gaolong micro-disseminated gold deposit of Guangxi shows that the δ34S value of sedimentary pyrite is-15.3 ‰～+13.6 ‰,the δ34S value of pyrite in the ore-bearing bed is +0.4 ‰～+15.6 ‰,the δ34S value of pyrite in siliceous rocks is +1.7 ‰～+9.7 ‰,and the δ34S value of stibnite in siliceous rocks is-15.3‰～+0.1‰.The sulfur isotope composition of the pyrite tends to decrease from the ore-bearing bed through the siliceous rocks and to the stibnite in siliceous rocks. The 206Pb/204Pb ratio in pyrite is 18.270～18.470, the 207Pb/204Pb ratio is 15.620～15.710, and the 208Pb/204Pb ratio is 38.310～37.740. The oxygen isotope of quartz in the ore deposit is +11.3‰～+23.9‰, the oxygen isotope of water is -4.2‰～+14.4‰, the hydrogen isotope in mineral inclusions is -53.4‰～-77.1‰, the oxygen isotope of calcite in the ore deposit is +10.5‰～+18.6‰, the oxygen isotope of water is -3,2‰～+10.7‰, and the hydrogen isotope in mineral inclusions is -54.5‰～-30.5‰. These data indicate that hydrothermal fluids might have deen derived from magmatic hydrothermal solution and atmospheric precipitation as well as ocean waters. |
| keywords:isotope micro-disseminated gold deposit Gaolong in Guangxi |
| 查看全文 查看/发表评论 下载PDF阅读器 |
|
|
|
|
|
