| 山东胶东地区某些金矿床的氩、氢、氧稳定同位素地球化学及矿床成因 |
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| 引用本文： | 王炳成,徐金方,郑文深,张理刚,陈振胜,刘敬秀.山东胶东地区某些金矿床的氩、氢、氧稳定同位素地球化学及矿床成因[J].地质与资源,1995,4(1):24-35. |
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| 作者姓名： | 王炳成 徐金方 郑文深 张理刚 陈振胜 刘敬秀 |
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| 作者单位： | 1. 山东省地质科学研究所;2. 宜昌地质矿产研究所 |
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| 摘 要： | 通过矿床地质特征、流体包裹体及氧、氢稳定同位素的研究,认为马家窑金矿属再平衡岩浆热液矿床,金青顶和十里铺金矿属大气降水热液矿床。马家窑金矿石英的δD、δ18O值高,变化小,比较稳定;蚀变岩石的δ18O在磺向上由围岩向矿脉逐渐升高。金青顶和十里铺金矿石英的δD、δ18O值低、变化大;蚀变岩石的δ18O值由地表向深部逐渐降低。开展金矿的氮稳定同泣素研究,在国内尚数首次。马家窑金矿36Ar在温度300℃以下相对含量不到10%,金青顶和十里铺金矿36Ar则达90%以上,表明前者以岩浆成因40Ar为代表,后者则以大气氩36Ar为代表,进而表明马家窑金矿是再平衡岩浆热液成因,金青顶和十里辅金矿是大气降水热液成因。示踪结果与H、O同位素一致,表明氩同位素在示踪成矿热液、矿床成因研究方面是一种较为有效的手段。
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| 关 键 词： | 胶东金矿 地球化学 稳定同位素 |
| 收稿时间： | 1993-12-06 |
THE STABLE ISOTOPE GEOCHEMISTRY OF ARGON，HYDROGEN，OXYGEN AND ORE GENESIS OF SOME GOLD DEPOSITS IN THE JIAODONG REGION,SHANDONG PROVINCE |
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| Wang Bingcheng,Xu Jinfang,Zheng Wenshen,Zhang Ligang,Chen Zhensheng,Liu Jingxiu.THE STABLE ISOTOPE GEOCHEMISTRY OF ARGON，HYDROGEN，OXYGEN AND ORE GENESIS OF SOME GOLD DEPOSITS IN THE JIAODONG REGION,SHANDONG PROVINCE[J].Geology and Resources,1995,4(1):24-35. |
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| Authors: | Wang Bingcheng Xu Jinfang Zheng Wenshen Zhang Ligang Chen Zhensheng Liu Jingxiu |
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| Institution: | 1. Shandong Institute of Geological Sciences;2. Yichang Institute of Geology and Mineral Resources |
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| Abstract: | Based on the study of the geological characteristics，fluid inclusions and stable isotopecompositions of hydrogen，oxygen and argon of the gold deposits in the Jiaodong region，itis suggested that the Majiayao gold deposit belongs to the hydrothermal one， formed from re—equilibrated magmatic water whereas the Jinqingding and shilipu gold deposits—hydrothermal deposits dominated by meteoric water．The 3D and δ~(18)O values of quartz in theMajiayao gold deposit are relatively high and stable with only a small variation；the δ~(18)O val-ues of the altered rocks increase gradually from wall rocks to ore veins. The δD and δ~(18)O val-ues of quartz in the Jinqingding and shilipu gold depesits are relatively lower with big varia-tion；the δ~(18)O values of altered rock decrease gradually from the surface down to the deep.The argon isotope study was carried out for the first time in China by the authors．Therelative amount of ~(36)Ar for samples from the Majiayao gold deposit is less than ten percentbelow 300 ℃ while that for samples from the Jinqingding and shilipu gold deposits is up toninety percent． This indicates that in the former deposit the magmatic origin ~(40)Ar ispredominanted wheras in the latter two deposits the meteoric argen ~(36)Ar is typical． It isconcluded that the Majiayao gold deposit belongs to the hydrothermal deposit formed in theparticipation of magmatic water whereas the Jinqingding and shilipu gold deposits belong tothe hydrothermal deposits with the involvement of meteoric water． The results obtained fromthe argon trace study are in close agreement with those of H and O isotopes which shows thattheargon isotope canbean eHective method in tracing ore—forming fluids and studying oregenesis. |
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| Keywords: | Jiaodong fold deposit geochemistry stable isotope |
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