• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Minerals >Geochronology, Petrology, and Genesis of Two Granitic Plutons of the Xianghualing Ore Field in South Hunan Province: Constraints from Zircon U–Pb Dating, Geochemistry, and Lu–Hf Isotopic Compositions
【24h】

Geochronology, Petrology, and Genesis of Two Granitic Plutons of the Xianghualing Ore Field in South Hunan Province: Constraints from Zircon U–Pb Dating, Geochemistry, and Lu–Hf Isotopic Compositions

机译：湘南香花岭铁矿田的两个花岗岩体的年代学，岩石学和成因：锆石U-Pb定年，地球化学和Lu-Hf同位素组成的制约

获取原文
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Two small-sized granitic plutons, outcropped in Xianghualing ore field, South Hunan (South China), have a close relationship with the super large-scale Sn–W polymetallic mineralization in this ore field. The Laiziling and Jianfengling plutons are composed of medium- to coarse-grained two-mica and coarse-grained biotite granites, respectively, and have zircon U–Pb ages of 156.4 ± 1.4 Ma and 165.2 ± 1.4 Ma, respectively. Both of the Laiziling and Jianfengling granites are characterized by extremely similar elemental and Lu–Hf isotopic compositions with high contents of SiO 2 , Al 2 O 3 , Na 2 O, K 2 O, high A/CNK ratios, negative ε Hf (t) values (ranging from ?3.86 to ?1.38 and from ?5.44 to ?3.71, respectively), and old T DMC ages (ranging from 1.30 to 1.47 Ga and from 1.32 to 1.56 Ga, respectively). These features indicate that they both belong to highly fractionated A-type granites, and were formed in an extensional setting and from the same magma chamber originated from the Paleoproterozoic metamorphic basement of South China with a certain amount of mantle-derived magma involved with temperatures of ca. 730 °C and low oxygen fugacity.
机译：在湘南（华南）香花岭矿田露头的两个小型花岗岩岩体与该矿田中超大规模的Sn-W多金属矿化有密切关系。来子岭和剑峰岭岩体分别由中粒至粗粒云母和黑云母花岗岩组成，锆石的U-Pb年龄分别为156.4±1.4 Ma和165.2±1.4 Ma。来子岭和尖峰岭两个花岗岩的特征都是元素和Lu-Hf同位素组成极为相似，它们的SiO 2，Al 2 O 3，Na 2 O，K 2 O含量高，A / CNK比高，εHf（t值（分别从？3.86至？1.38和从？5.44至？3.71）和旧的T DMC年龄（分别从1.30至1.47 Ga和1.32至1.56 Ga）。这些特征表明它们都属于高度分馏的A型花岗岩，形成于伸展环境中，并且来自华南古元古代变质基底中的同一岩浆室，其中一定量的地幔衍生岩浆与温度成正比。 ca. 730°C，低氧逸度。

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