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江西德兴银山铜铅锌多金属矿床稳定同位素地球化学研究
- 吴荔|匡文龙|张志辉|申滔|杨铖|张跃权
- 作者单位：
- 湖南科技大学地球科学与空间信息工程学院|湖南科技大学地球科学与空间信息工程学院|江西铜业集团银山矿业有限责任公司|江西铜业集团银山矿业有限责任公司|江西铜业集团银山矿业有限责任公司|湖南科技大学地球科学与空间信息工程学院
基金项目：
- 湖南省自然资源厅科研项目（2022-23）；江西铜业集团科研项目（YSYJ2022001）
详细信息：
- 作者简介：
- 吴荔（1998—），女，硕士研究生，研究方向为矿产勘查；E-mail:1404122672@qq.com
- 通讯作者：
- 匡文龙（1966—），男，教授，博士，研究方向为矿产勘查与矿床（体）的定位定量预测与评价、矿产资源区域评价与预测、地质灾害防治等；E-mail:kuangwenlong2002@sina.com
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Stable isotope geochemistry study of Yinshan copper-lead-zinc polymetallic deposit in Dexing,Jiangxi
- English Author：
- School of Earth Science and Space Information,Hunan University of Science and Technology|School of Earth Science and Space Information,Hunan University of Science and Technology|Jiangxi Copper Group Yinshan Mining Co.,Ltd.|Jiangxi Copper Group Yinshan Mining Co.,Ltd.|Jiangxi Copper Group Yinshan Mining Co.,Ltd.|School of Earth Science and Space Information,Hunan University of Science and Technology
- Unit：
- 摘要
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- 参考文献
摘要:
针对银山铜铅锌多金属矿床进行氢、氧、硫、铅同位素研究，以判定其成矿物质的来源。研究结果表明：δD值为-78.9 ‰~-28.5 ‰，平均值为-56.5 ‰；δ18OV-SMOW值为12.10 ‰~18.70 ‰，平均值为16.06 ‰；δ18OH2O值为0.18 ‰~11.26 ‰，平均值为8.24 ‰；反映了成矿流体是岩浆水和大气降水的混合。δ34S值为-1.04 ‰~2.71 ‰，平均值为1.35 ‰，与矿区赋矿地层张村岩组的硫同位素明显不同，暗示了成矿物质不是直接来自地层，但呈现出明显的幔源硫(-3 ‰~3 ‰)特征，与矿区火山-次火山活动有紧密联系。铅同位素206Pb/204Pb=17.890 0~18.319 0，207Pb/204Pb=15.528 0~15.602 5，208Pb/204Pb=38.025 2~38.445 0，表明铅来源为壳幔混源，矿石与岩浆岩具有亲缘性。
关键词:
地球化学；银山铜铅锌多金属矿床；稳定同位素；次火山活动；岩浆岩；矿石
Abstract:
The hydrogen,oxygen,sulfur,and lead isotopes of Yinshan copper-lead-zinc polymetallic deposit were studied to determine the sources of ore-forming materials.The research results indicate that the δD values range from -78.9 ‰ to -28.5 ‰,with an average value of -56.5 ‰;the δ18OV-SMOW values range from 12.10 ‰ to 18.70 ‰,with an average value of 16.06 ‰;the δ18OH2O values range from 0.18 ‰ to 11.26 ‰,with an average of 8.24 ‰,indicating a mixture of magmatic water and atmospheric precipitation as the ore-forming fluids.The δ34S values range from -1.04 ‰ to 2.71 ‰,with an average value of 1.35 ‰,which is significantly different from the sulfur isotopes of the ore-bearing strata of Zhangcun Formation in the mining area,suggesting that the ore-forming materials do not directly come from the strata but have a clear mantle sulfur (-3 ‰ to 3 ‰) signature,closely related to volcanic-subvolcanic activities in the mining area.The lead isotopes (206Pb/204Pb = 17.890 0-18.319 0,207Pb/204Pb=15.528 0-15.602 5,208Pb/204Pb=38.025 2-38.445 0) indicate a mixed source of crust and mantle,and the ores have an affinity with the magmatic rocks.
Keywords:
geochemistry;Yinshan copper-lead-zinc polymetallic deposit;stable isotopes;subvolcanic activities;magmatic rocks;ore