| 山东土堆－沙旺金矿床同位素组成特征及矿床成因讨论 |
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| 关键词:isotopic geochemistry geochronology Tudui-Shawang Jiaodong |
| 基金项目:教育部创新团队发展计划项目(编号: IRT0755)；中央高校基本科研业务费专项资金资助项目 |
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| Isotopic Composition Features and Ore-forming Mechanism of the Tudui-Shawang Gold Deposit in Shandong Province |
| The Tudui-Shawang gold deposit lies in the northeastern margin of the Jiaolai basin and is located at the center of the Rushan-Mouping gold belt in Jiaodong Peninsula. The Rb-Sr isochron age of the fluid inclusions in quartz is about 119±10 Ma, which is consistent with the main stage of the extensive gold mineralization in the Jiaodong gold province. The sulfur isotopic composition of ores ranges from 8.5‰ to 12.72‰, implying an ore fluid with δ34S∑S equal to10.03‰. Ore sulfides have 206Pb/204Pb of 17.12~17.86 and exhibit low μ but high ω values, indicating the derivation of ore-forming materials from the lower crust or the mantle. δD and recalculated δ18OH2O values vary from –68.64 to –86.47‰ and from +1.96‰ to +7.71‰ respectively, implying that the ore fluid was dominated by magmatic water with the participation of some later meteoric water. Pb isotopes of ore sulfides are coincident with those of contemporaneous dikes and their linear array suggests that both of them might have been related to the change of tectonic regime of the eastern North China craton during the Early Cretaceous. |
| LI Hong-mei,WEI Jun-hao,WANG Qi,YU Hai-tao,LIU Guo-chun,HUANG Xiang-zhi.2010.Isotopic Composition Features and Ore-forming Mechanism of the Tudui-Shawang Gold Deposit in Shandong Province[J].Acta Geoscientica Sinica,31(6):791-802. |
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