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首页> 外文期刊>Journal of Asian earth sciences >Zircon geochronology, geochemistry and stable isotopes of the Wang'ershan gold deposit, Jiaodong Peninsula, China
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Zircon geochronology, geochemistry and stable isotopes of the Wang'ershan gold deposit, Jiaodong Peninsula, China

机译：胶东半岛王耳山金矿的锆石年代学，地球化学和稳定同位素

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摘要

The Early Cretaceous gold deposits of the Jiaodong Peninsula, eastern China, define China's largest gold province with an overall endowment estimated more than 3000 t Au. The Wang'ershan gold deposit at the northern margin of the Jiaolai Basin in Jiaodong Peninsula of eastern China is located in the central-southern segment of the Wang'ershan fault zone. The major Mesozoic intrusions exposed in this region are the Linglong granite and the Guojialing granodiorite to the northeast of the deposit. Both these intrusions show high-K and alkaline signature. The Linglong granite displays peraluminous feature whereas the Guojialing granodiorite is metaluminous. Zircon U- Pbdating of the Linglong granite yields Pb-206/U-238 weighted mean age of 149.0 +/- 1.3 Ma. The muscovite from the alteration zones associated with mineralization in the Linglong granite yields a plateau age of 130.35 +/- 0.96 Ma, representing the initial phase of the hydrothermal activity. The 8348 values of pyrite from the gold mineralized veins range from 6 parts per thousand to 8.3 parts per thousand with the mean value of 7.66 parts per thousand. The He-3/He-4 ratios of pyrite are in the range 1.58-2.71 Ra with a mean value at 2.168 Ra. The Ar-40/Ar-36 ratios show variation from 1220.3 to 1625.7 with an average of 1483.8. The 8180 values of the mineralizing fluids show a range of -2.13 parts per thousand to 7.5 parts per thousand with an average of 2.4 parts per thousand. The delta D-18(w), values are in the range of -97.5 parts per thousand to -61.4 parts per thousand, with a mean at -82.6 parts per thousand. Detailed elemental and isotopic data suggest that the hydrothermal fluids in early stage were mainly magmatic and derived from the Guojialing granodiorite, and the ore-forming fluids in the main ore-forming stages evolved into a mixture of magmatic and meteoric water. The ore-forming materials were primarily derived from crust, with minor input of mantle components. The ore-forming fluids might be related to the subduction of the paleo-Pacific slab beneath the North China Craton and the associated asthenosphere upwelling and consequent lithospheric thinning. (C) 2015 Elsevier Ltd. All rights reserved.
机译：中国东部胶东半岛的白垩纪早期金矿床，是中国最大的黄金省，总储量估计超过3000吨金。中国东部胶东半岛胶莱盆地北缘的王耳山金矿位于王耳山断裂带的中南段。该地区暴露的主要中生代侵入体是矿床东北部的玲珑花岗岩和郭家岭花岗闪长岩。这些入侵都显示出高K和碱性特征。玲珑花岗岩具有高铝质特征，而郭家岭花岗闪长岩是金属质的。玲珑花岗岩的锆石U-铅矿化生成的Pb-206 / U-238加权平均年龄为149.0 +/- 1.3 Ma。玲珑花岗岩中与矿化作用有关的蚀变带上的白云母的高原年龄为130.35 +/- 0.96 Ma，代表了热液活动的初始阶段。来自金矿脉的黄铁矿的8348值范围从千分之6到千分之8.3，平均值为千分之7.66。黄铁矿的He-3 / He-4比率在1.58-2.71 Ra范围内，平均值为2.168 Ra。 Ar-40 / Ar-36比值显示从1220.3到1625.7的变化，平均值为1483.8。矿化液的8180值范围为-2.13千分之至7.5千分，平均为2.4千分。 δD-18（w）值在-97.5千分之至-61.4千分之内，平均值为-82.6千分。详细的元素和同位素数据表明，早期的热液主要来自岩浆，来自郭家岭花岗闪长岩，主要成矿阶段的成矿流体演化成岩浆水和陨石水的混合物。成矿物质主要来自地壳，仅需少量地幔成分。成矿流体可能与华北克拉通下面的古太平洋板块俯冲作用以及相关的软流圈上升和岩石圈变薄有关。 （C）2015 Elsevier Ltd.保留所有权利。

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  • 来源
    《Journal of Asian earth sciences》 |2015年第2期|695-710|共16页
  • 作者

    Li Yu-Jie; Li Sheng-Rong; Santosh M.; Liu Sheng-Ao; Zhang Long; Li Wen-Tao; Song Ying-Xin; Wang Bi-Xue;

  • 作者单位

    China Univ Geosci, State Key Lab Geol Proc & Mineral Resources, Beijing 100083, Peoples R China|China Univ Geosci, Sch Earth Sci & Resources, Beijing 100083, Peoples R China;

    China Univ Geosci, State Key Lab Geol Proc & Mineral Resources, Beijing 100083, Peoples R China|China Univ Geosci, Sch Earth Sci & Resources, Beijing 100083, Peoples R China;

    China Univ Geosci, Sch Earth Sci & Resources, Beijing 100083, Peoples R China;

    China Univ Geosci, Sch Earth Sci & Resources, Beijing 100083, Peoples R China;

    China Univ Geosci, Sch Earth Sci & Resources, Beijing 100083, Peoples R China|1th Gold Detachment Chinese Armed Police Force, Harbin, Peoples R China;

    China Univ Geosci, Sch Earth Sci & Resources, Beijing 100083, Peoples R China;

    China Univ Geosci, Sch Earth Sci & Resources, Beijing 100083, Peoples R China;

    China Univ Geosci, Sch Earth Sci & Resources, Beijing 100083, Peoples R China;

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  • 正文语种 eng
  • 中图分类
  • 关键词

    Zircon geochronology; Stable isotopes; Geochemistry; Wang'ershan gold deposit; Jiaodong Peninsula;

    机译：锆石年代学稳定同位素地球化学王二山金矿胶东半岛;

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