| 王义文.夹皮沟金矿带硫同位素地球化学及找矿评价意义[J].地质找矿论丛,1988,(1):58-69 |
| 夹皮沟金矿带硫同位素地球化学及找矿评价意义 |
| SULFUR ISOTOPIC GEOCHEMISTRY OF JIAPIGOU Au-METALLOGENIC BELT AND ITS SIGNIFICANCE IN PROSPECTING |
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| DOI：10.6053/j.issn.1001-1412.1988.1. 006 |
| 中文关键词: 夹皮沟金矿带 硫同位素 平衡温度 扩散分馏 |
| 英文关键词: |
| 基金项目: |
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| 中文摘要: |
| 辽宁地区太古界与元古界的硫同位素背景值有明显差异。金矿床矿石硫同位素组成受矿源层硫同位素背景值制约。与同位素扩散分馏效应有关,张性断裂中的金矿体δS34较低。研究金矿床硫同位素分布规律有助于矿床深部予测。 |
| 英文摘要: |
| The sulfur isotopic background value of Archean Group is distinct from that of Proterozic Group. The δS34 of the former is 0‰, and the latter is +10-15‰. Ore-sulfur isotopic composition of gold deposits is controlled by the sulfur isotopic background value of the gold source bed. The gold deposits in the metamorphic complex of archean group in the platform area have the following characteristics: X (mean δ6S34)=+3～+8‰; sulfur isotopic distribution in the associated minerals was equilibrated so S-isotopic equilibration temperature can be calculated by δSA34-δSB34; sulfur in the ore is relatively riched in σS34 than that of the source beds.The gold deposits in spesific palaoezoic horizons in geosynclinal area, X
=-7～-1‰; S-isotopic distribution in the associated minerals, not equilibrated; sulfur in the ore, relatively depleted than that of the source beds. The gold deposits in the proterozoic carbonatic formation of transition alzone betwwen geosyncline and platform has a δS34 pattern that is highly variable and far from thepattern of the meteorite in the positive direction. S-isotopic distribution in the gold deposits show: (1) multiple superimposition of mineralizaton,i. e. there is both Precambrain and Phanerozoic; (2)the diffusion fractionation effect, the lower δS34of the ore bodies locating in the tensile fractures. THe study of S-isotopic space distribution in gold deposits should be helpful for ore bodies prognossis in depth. |
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