| 小秦岭—熊耳山地区金矿的成矿流体特征 |
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| 引用本文：.2003.Characteristics of Ore-forming Fluids in Gold Deposits of Xiaoqinling-Xiong'ershan Area[J].Mineral Deposits,22(4):377~385 |
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| 基金项目:国家重点基础研究项目(编号：G1999043200)和中国地调局花岗岩重大基础项目(编号：200113900018) |
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| 中文摘要:文章系统地总结分析了小秦岭—熊耳山地区金矿的成矿流体特征和成 矿作用及矿床的S、Pb、O、C等稳定同位素特征，提出金矿床的成矿流体为地幔流体。流体 的运移方向则是自南向北，由下向上，并非来自矿床北部的燕山期文峪花岗岩。新的测年结 果表明，不少矿床的成矿时代为印支期，燕山期是迭加在印支期之上的成矿期。它们构成了 中国东部中生代成矿作用的完整旋回。成矿受印支期构造作用的制约，是在远离商丹主缝合 带的拉张环境下形成的。 |
| 中文关键词:地球化学 地幔流体 稳定同位素 流体运移方向 印支期成矿 小秦岭—熊耳山 |
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| Characteristics of Ore-forming Fluids in Gold Deposits of Xiaoqinling-Xiong'ershan Area |
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| Abstract:This paper has summed up systematically characteristics of ore-forming fluids an d ore_forming processes as well as features of such stable isotopes as S, Pb, O and C in gold deposits of Xiaoqinling-Xiong'ershan area, and pointed out that th e ore_forming fluids are actually mantel fluids. The migration of fluids was fro m south to north and from the depth to the shallow part rather than from Wenyu g ranitic body in the north. New age data show that the ore-forming processes of m ost gold deposits took place in Indosinian epoch, whereas Yanshanian was another ore-forming epoch superimposed upon the Indosinian epoch. Geophysical data reve al that in this area mantle upheaval occurred. Hence the gold deposits were form ed at the shallow part of the crust during the upward migration of mantle fluids due to the mantle upheaval and mantle plume. The ore_forming processes had noth ing to do with Yanshanian granites. |
| keywords:geochemistry, mantle fluid, stable isotope, direction of flu id migration, ore-forming process of Indosian epoch, Xiaoqinling-Xiong'ershan area |
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