| 王佐满,任继刚,张剑峰,丁高明.豫西夜长坪钼矿区矿床地质与硫同位素地球化学[J].矿产勘查,2013,4(3):283-288 |
| 豫西夜长坪钼矿区矿床地质与硫同位素地球化学 |
| Geology and sulphur geochemistry of Yechangping molybdenum deposit, western Henan |
| 投稿时间：2012-06-14 |
| DOI： |
| 中文关键词: 夜长坪 矿床类型 硫同位素地球化学 成矿物质来源 |
| 英文关键词: Yechangping deposit type sulphur isotopic geochemistry sources of metallogenic materials |
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| 中文摘要: |
| 河南省卢氏县夜长坪钼矿是近期在东秦岭钼矿带中新发现的大型—超大型斑岩—夕卡岩型钼矿床。该区地层为中元古界官道口群碳酸盐岩建造,矿床产于深部的花岗斑岩体和夕卡岩中,而浅部的花岗斑岩不含矿。笔者通过对深部含矿花岗斑岩和夕卡岩矿体进行硫同位素测试分析发现,二者的δ34S值变化范围较窄,接近陨石硫且具有深源硫的特征；此外,斑岩钼矿与夕卡岩钼矿的δ34S无论是变化范围还是平均值,都具有相似特征,说明二者成矿物质中的硫应该具有相同的来源。结合钻孔剖面,推断深部含矿花岗斑岩应为成矿母岩；再者,该区钼矿石的δ34S值与东秦岭钼矿带上其他矿床具有相似的硫同位素特征。结合东秦岭地区基底地层和沉积盖层的硫同位素组成特征,推断硫化物矿物中的硫来自基底而非沉积盖层,并断定该区的成矿物质来自于深部,伴随着燕山期的岩浆作用到达成矿部位。因此这是一个由构造—地层—岩浆—热液共同约束形成的大型—超大型矿床。 |
| 英文摘要: |
| The Yechangping Mo deposit located in Lushi county of Henan Province, is a newly discovered large-super-large sized porphyry-skarn type molybdenum deposit in the East Qinling molybdenum belt. The stratum in this deposit area is Mesoproterozoic Guandaokou group carbonate formations, the host rocks are the granite porphyry and skarn which occur in the deep part below the surface, there is no molybdenum mineralization in the shallow granite porphyry. Through the sulfur isotope study of the deep ore-bearing granite porphyry and skarn, it was found that the variation range of δ34S is narrow, similar to that of aerolite sulfur with the characteristic of deep source. In addition, the variation range and values of the sulphur isotope in both porphyry type and skarn type molybdenum have similar features, it indicated that the sulfur in the metallogenic material should come from the same source. Based on the drilling results, it is speculated that the deep ore-bearing granite porphyry should be the source rock. By comparing the δ34S of molybdenum ore in the deposit area with other Mo deposits in the East Qinling ore belt, it was found that they have similar features of sulfur isotope. By analyzing the sulfur compositions in the basement rocks and overlying sedimentary rocks of East Qinling area, the authors conclude the sulfur in the sulfide mineral is originated from the deep basement rather than the overlying sedimentary layer. Therefore, the Yechangping Mo deposit is a large-super-large sized deposit formed by the jointed controlling factors of structure-stratum-magma-hydrothermal fluids. |
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