| 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.强烈热液交代金矿石Rb—Sr等时线意义讨论[J].地球学报,1997,18(3):290-298. |
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| 作者姓名： | 魏春生 郑永飞 涂光炽 |
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| 作者单位： | 中国科学技术大学地球与空间科学系，中国科学院地球化学研究所;中国科学技术大学地球与空间科学系;中国科学院地球化学研究所 |
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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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| 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ＲｂＳｒ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。
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| 关 键 词： | Rb-Sr等时线 热液交代金矿石 阿尔泰 新疆 |
The Geological Significance of the Estremely Hydrothermal Metasomatized Auriferous Ore Rb-Sr Isochron |
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| WEI Chun-sheng,ZHENG Yong-fei and TU Guang-zhi.The Geological Significance of the Estremely Hydrothermal Metasomatized Auriferous Ore Rb-Sr Isochron[J].Acta Geoscientia Sinica,1997,18(3):290-298. |
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| Authors: | WEI Chun-sheng ZHENG Yong-fei and TU Guang-zhi |
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| Institution: | Department of Earth and Space Sciences, University of Science and Technology of China; Advanced Research Centre of Earth Science and Astronomy, The Third World Acdemy of Science, Hefei;Department of Earth and Space Sciences, University of Science and Technology of China;Advanced Research Centre of Earth Science and Astronomy, The Third World Acdemy of Science, Hefei |
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| Abstract: | Results of major ,REE and trace elements and Sr_Nd isotopes of amphibole and clinopyroxene megacrysts from Nushan,Hannuoba and Puning have been given.There are three types of CPX megacrysts in research areas: Al_augite,diopside and Fe_Na diopside.Hastingsite megacrysts from Puning are very rare in the world .CPX and amphibole megacrysts are crystallizic products of basaltic magma at mantle pressure.All of them are xenocrysts.Megacrysts represent cumulates of flow crystallization by basaltic magma .They have no genetic relatins with green xenoliths and probably represent the cognate with some of the black xenoliths. |
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| Keywords: | RbSr isochron hydrothermal metasomatized auriferous ore Altai Xinjiang |
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