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| 四川九龙县子杠坪铅锌矿床硫同位素地球化学特征 |
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刘应冬1,2,3, 谢海峰4,5, 徐力1,2,3, 倪志耀5, 吕丰强6, 谭洪旗1,2,3
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1.中国地质科学院矿产综合利用研究所, 四川 成都 610041;2.中国地质调查局稀土资源应用技术创新中心, 四川 成都 610041;3.中国地质调查局金属矿产资源综合利用技术研究中心, 四川 成都 610041;4.广东省水利电力勘测设计研究院, 广东 广州 510635;5.成都理工大学地球科学学院, 四川 成都 610059;6.四川省地质矿产勘查开发局川西北地质队, 四川 绵阳 621000
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| 摘要: |
| 子杠坪中型铅锌矿床地处松潘-甘孜造山带东南缘与扬子地块西缘交界地区。矿体呈似层状、透镜状等产于上二叠统大石包组含石榴斜长黑云石英片岩与含石榴钠长云母片岩夹石英片岩之间的层间带中。矿石矿物主要为闪锌矿、方铅矿、磁黄铁矿。对九龙子杠坪铅锌矿床中方铅矿、磁黄铁矿和闪锌矿，开展了硫同位素地球化学研究。结果表明，24件金属硫化物样品的δ34S值为10.67‰~18.17‰（平均14.79‰），均为正值且较接近，以富集重硫为特征。硫表现出混染硫的特征，以热化学硫酸盐还原作用为主，来自于建造水并有深部热流体的混合特征。 |
| 关键词: 硫同位素 地球化学 子杠坪铅锌矿床 九龙 子杠坪 |
| DOI： |
| 分类号:P595;P618.4 |
| 基金项目:国家自然科学基金项目《川西里伍岩群变质-热事件：年代学证据及构造意义》（批准号：41603034））和中国地质调查局项目《四川九龙-可尔因大型锂资源基地综合调查评价》（编号：DD20190185） |
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| Sulfur isotopic geochemistry of the Zigangping Pb-Zn deposit,Jiulong County,Sichuan Province |
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LIU Yingdong1,2,3, XIE Haifeng4,5, XU Li1,2,3, NI Zhiyao5, Lü Fengqiang6, TAN Hongqi1,2,3
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1.Institute of Multipurpose Utilization of Mineral Resources, CAGS, Chengdu 610041, Sichuan, China;2.Technical Innovation Center of Rare Earth Resources, China Geological Survey, Chengdu 610041, Sichuan, China;3.Research Center of Multipurpose Utilization of Metal Mineral Resources of China Geological Survey, Chengdu 610041, Sichuan, China;4.Guangdong Hydropower Planning&Design Institute, Guangzhou 510635, Guangdong, China;5.College of Earth Sciences, Chengdu University of Technology, Chengdu 610059, Sichuan, China;6.Northwest Sichuan Geological Party, Sichuan Bureau of Geology and Mineral Exploration and Development, Mianyang 621000, Sichuan, China
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| Abstract: |
| The Zigangping Pb-Zn deposit lies on the southeastern margin of the Songpan-Garze orogenic belt and western Yangtze block.The orebodies are layered and lenticular in the interlayer fault zone between the garnet-bearing plagioclase biotite quartz schist and garnet-bearing paragonite schist intercalated with quartz schist.The ore minerals are mainly sphalerite,galena and pyrrhotite.The δ34S analysis was carried out on ore-related sulfides from galena,pyrrhotite and sphalerite.The δ34S values mainly vary between 10.67‰ and 18.17‰ (averaging 14.79‰),and are characterized by enrichment of heavy sulfur and mixed sulfur.The S isotopic data indicate that the sulfur may have experienced thermochemical sulfate reduction,with the characteristics of formation water and deep thermal fluids. |
| Key words: sulfur isotopes geochemistry Zigangping Pb-Zn deposit Jiulong Zigangping |