| 四川乌依铅矿床成矿物质来源:硫、铅同位素和方铅矿稀土元素地球化学制约 |
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| 引用本文： | 谭洪旗.四川乌依铅矿床成矿物质来源:硫、铅同位素和方铅矿稀土元素地球化学制约[J].地质与勘探,2017,53(6):1051-1060. |
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| 作者姓名： | 谭洪旗 |
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| 作者单位： | 1. 中国地质科学院矿产综合利用研究所,四川成都 610041;成都理工大学地球科学学院,四川成都 610059;2. 中国地质科学院矿产综合利用研究所,四川成都,610041;3. 四川省地矿局川西北队,四川绵阳,621000 |
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| 基金项目： | 中国地质调查局地质调查项目（编号：1212010000150002）和国家自然科学基金项目（编号：
41603034）资助 |
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| 摘 要： | 四川布托县乌依铅矿床是川滇黔相邻区赋存于奥陶系大箐组地层中的典型密西西比河谷型矿床之一,其成矿物质来源仍不清楚。本文开展了方铅矿和石膏硫同位素及方铅矿稀土元素地球化学研究,获得方铅矿硫同位素δ~(34)S平均值为-4.04‰(n=31),石膏δ~(34)S平均值为29‰(n=15)。方铅矿稀土元素地球化学表明,轻稀土富集,重稀土明显亏损,稀土配分模式曲线大致向右倾,Eu正异常和Ce负异常。结合前人的硫、铅同位素数据,认为乌依铅矿床硫来源于细菌还原地层中硫酸盐所产生的硫,矿石铅来自上地壳,成矿物质来源为奥陶系大箐组,与峨眉山玄武岩无关。
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| 关 键 词： | 硫同位素 铅同位素 稀土元素 铅矿床 乌依 布拖县 四川省 |
| 收稿时间： | 2016/7/30 0:00:00 |
| 修稿时间： | 2017/5/4 0:00:00 |
Ore-forming material source of the Wuyi lead deposit in Sichuan Province: Constraints from geochemistry of sulfur, lead isotope and galena rare earth elements |
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| Tan Hong-qi.Ore-forming material source of the Wuyi lead deposit in Sichuan Province: Constraints from geochemistry of sulfur, lead isotope and galena rare earth elements[J].Geology and Prospecting,2017,53(6):1051-1060. |
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| Authors: | Tan Hong-qi |
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| Abstract: | The Wuyi lead deposit is one of the typical Mississippi Valley type deposits occurred in the Ordovician Daqing Formation in the Sichuan-Yunnan-Guizhou neighboring region. To address the question about ore-forming material sources for this deposit,this work conducted a geochemical study on galena and gypsum sulfur isotopes and rare earth elements of galena. The results show that the average of galena sulfur isotope (δ34 S) is -4. 04‰(n=31)and gypsum sulfur isotope (δ34S)is 29‰(n=15). The rare earth elements of galena exhibit an enrichment of heavy rare earth elements and a deficit of light REE,and distribution pattern curves of REE are approximately of right deviation with positive Eu anomalies and negative Ce anoma-lies. In combination with previous sulfur and lead isotope data from this deposit,this study suggests that the sulfur of the Wuyi lead deposit was derived from reduction sulfate of stratum,and the ore-forming material source of the lead is not the Emeishan basalt,but the Ordovician Daqing Formation. |
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| Keywords: | sulfur isotope lead isotope lead deposit Wuyi Butuo |
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