黄金科学技术 ›› 2023, Vol. 31 ›› Issue (1): 1-14.doi: 10.11872/j.issn.1005-2518.2023.01.136
• 矿产勘查与资源评价 • 下一篇
Yong ZHANG(),Aikui ZHANG,Shuyue HE,Zhigang LIU,Yongle LIU,Peng ZHANG,Feifei SUN
摘要:
库德尔特金矿床是东昆仑祁漫塔格新发现的一处中型金矿床,金矿赋存于花岗闪长岩中。通过对花岗闪长岩开展岩石地球化学、锆石U-Pb年代学和Hf同位素研究,探讨该矿床成岩时代、成因类型和构造环境。研究结果显示:花岗闪长岩为一套准铝质高钾钙碱性岩石系列,呈现轻稀土富集的右倾分配模式,具有较明显的负Eu异常,富集大离子亲石元素(Rb、K)、活泼不相容元素(Th、U)和LREE元素,相对亏损高场强元素(Nb、Ta、Ti、P)、HREE元素和Sr元素,成岩年龄为(242.9±1.3)Ma。结合前人研究成果,认为库德尔特花岗闪长岩是在中三叠世大洋板块俯冲与碰撞转换环境中形成的I型花岗岩。
中图分类号:
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