| 强烈热液交代金矿石Rb—Sr等时线意义讨论 |
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| 引用本文：魏春生,郑永飞,涂光炽.1997.强烈热液交代金矿石Rb—Sr等时线意义讨论[J].地球学报,18(3):290-298. |
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| 基金项目:国家自然科学基金,中科院矿床地球化学开放实验室基金 |
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| 中文摘要:本文以曾经遭受强烈热液交代的含金石英闪长岩为研究对象，首次尝试性探索金矿石ＲｂＳｒ等时线测年研究。结果表明，在特定的热液蚀变矿物组合（不含绿帘石，以石英±绿泥石±绢云母±钠长石为主），强烈热液蚀变（黄铁矿化度（ＤＯＰ）＞７０％）以及锶同位素初始组成基本达到均一化的前提条件下，其Ｒｂ Ｓｒ等时线具确定的成矿地质意义，可代表后期热液蚀变年龄，这将为研究热液成矿年龄并进而探讨成矿机理提供又一可能的新途经。 |
| 中文关键词:Rb-Sr等时线 热液交代金矿石 阿尔泰 新疆 |
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| The Geological Significance of the Estremely Hydrothermal Metasomatized Auriferous Ore Rb-Sr Isochron |
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| Abstract:The validity and its metallogenic implications of the extremely hydrothermal metasomatized auriferous ores RbSr isochron was carried out for the first time in Altai,Xinjiang.The results indicated that the RbSr isochron was of unambiguous significance under the following circumstances,(1)no epidote_bearing alteration assemblages(quartz±chlorite±sericite±albite,etc)were developed;(2)strongly altered(degree of pyritization greater than 70%)and(3)the initial strontium isotope ratio was homogenized.This'll be an alternative potential way to date the ore_forming related geological event and constrain the ore deposit genesis model. |
| keywords:RbSr isochron hydrothermal metasomatized auriferous ore Altai Xinjiang |
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