| 山门银金矿铅同位素地球化学研究 |
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| 关键词:lead isotope Electrum granite |
| 基金项目:吉林省科委资助项目(吉科033号) |
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| 摘要: |
| A Geochemistry Study of the Lead Isotope in the Shanmen Electrum Deposit |
| This paper deals mainly with the genesis of the Shanmen electrum deposit based on lead isotope ratios of ores,granites and strata.The data of rock lead and ore lead were projected on te map of Zartman′s lead model.The data of ore lead are all located between the line of the mantle and that of the fold belt or,more exactly,near the mantle line,suggesting the derivation of ore lead from the mantle.There are data of rock lead between the fold belt line and the upper lithosphere line,implying the derivation of rock lead from the granite formed by the remelting of the oldest crust.It is thus known that most ore-formng substances were derived from the ore-hosting strata in the Shanmen deposit.The granites of Indo-China movement or Indo-China-Yanshanian movement were produced by the remelting of the oldest strata in this region.The hydrothermal processes of the granites are very important in the formation of the Shanmen deposit. |
| XIAN Jia-quan,ZHOU Yan,ZHANG Yan-jie,WANG Tie-fu.2004.A Geochemistry Study of the Lead Isotope in the Shanmen Electrum Deposit[J].Acta Geoscientica Sinica,25(2):137-140. |
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