...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Ore Geology Reviews: Journal for Comprehensive Studies of Ore Genesis and Ore Exploration >The genesis of the ores and granitic rocks at the Hongshi Au deposit in Eastern Tianshan, China: Constraints from zircon U-Pb geochronology, geochemistry and isotope systematics
【24h】

The genesis of the ores and granitic rocks at the Hongshi Au deposit in Eastern Tianshan, China: Constraints from zircon U-Pb geochronology, geochemistry and isotope systematics

机译：中国东山东洪石奥氏矿床的成因：锆石：锆石U-PB地理学，地球化学和同位素系统的约束

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

The Hongshi gold deposit is located in the southwestern margin of the Kanggur-Huangshan ductile shear zone in Eastern Tianshan, Northwest China. The gold ore bodies are predominantly hosted in the volcanogenic metasedimentary rocks of the Lower Carboniferous Gandun Formation and the Carboniferous syenogranite and alkali-feldspar granite. The syenogranite and the alkali-feldspar granite yield SHRIMP zircon U-Pb ages of 337.6 +/- 4.5 Ma (2 sigma, MSWD = 1.3) and 334.0 +/- 3.7 Ma (2 sigma, MSWD = 1.1), respectively, indicating that-the Hongshi gold deposit is younger than 334 Ma. The granitoids belong to shoshonitic series and are relatively enriched in large ion lithophile elements (Rb, K, Ba, and Pb) and depleted in high field-strength elements (Nb, Ta, P, and Ti). Moreover, these granitoids have high SiO2, Al2O3, and K2O contents, low Na2O, MgO, and TiO2 contents, low Nb/Ta ratios, and slightly positive Eu anomalies. The epsilon(Hf)(t) values of the zircons from a syenogranite sample vary from +1.5 to +8.8 with an average of +5.6; the epsilon(Hf)(t) values of the zircons from an alkali feldspar granite sample vary from +5.0 and +10.1 with an average of +7.9. The delta S-34 values of 10 sulfide samples ranged from -11.5 parts per thousand to +4.2 parts per thousand, with peaks in the range of +1 parts per thousand. to +4 parts per thousand. The above-mentioned data suggest that the Hongshi granitoids were derived from the melting of juvenile lower crust mixed with mantle components formed by the southward subduction of the paleo-Tianshan ocean plate beneath the Aqishan-Yamansu island arc during the Early Carboniferous. The Hongshi gold deposit was formed by post-collisional tectonism during the Permian. The granitoids most likely acted as impermeable barriers that prevented the leakage and runoff of ore-bearing fluids. Thus, the granitoids probably played an important role in controlling gold mineralization. (C) 2015 Elsevier B.V. All rights reserved.
机译：Hongshi金矿床位于西北天山东山康尔 - 黄山韧性剪力区的西南边缘。金矿体主要载于较低的石炭系甘道形成和石炭系中生根和碱金刚石花岗岩的波动性元化岩石中。 Syenogranite和碱金属花岗岩产量分别产生337.6 +/- 4.5 mA（2 sigma，Mswd = 1.3）和334.0 +/- 3.7 mA（2 sigma，Mswd = 1.1）的虾锆u-pb ages，表明这一点 - 洪芯金矿床小于334 mA。花岗岩属于舒山脉系列，并且在大离子鳞片元件（Rb，K，Ba和Pb）中相对富集，并在高场强元件（Nb，Ta，p和Ti）中耗尽。此外，这些花岗岩具有高SiO 2，Al 2 O 3和K 2 O含量，低Na 2 O，MgO和TiO 2含量，低Nb / Ta比和略微正面的Eu异常。来自Syenogranite样品的氧化锆（HF）（T）值从+ 1.5至+8.8变化，平均为+5.6;来自碱金属花岗岩样品的氧化锆（HF）（T）值从+ 5.0和+10.1的+ 5.0和+10.1分，平均值+7.9。 10硫化物样品的ΔS-34值范围为-11.5份千分之一至+ 4.2份百分之一，峰值+1份百分点。到+4份千分之一。上述数据表明，洪智花岗岩源于少年下地壳的熔化与由在早期的石炭系中的古天山海岛弧下方的古天山海洋板南部南部俯冲形成的披风部件。红石金矿床是通过在二叠纪碰撞后的构造。花岗岩最有可能充当不可渗透的屏障，防止矿石液体泄漏和径流。因此，花岗岩可能在控制黄金矿化方面发挥了重要作用。 （c）2015 Elsevier B.v.保留所有权利。

著录项

相似文献

  • 外文文献
  • 中文文献
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号