摘要
三角顶金矿床为近年在柴北缘新发现产于奥陶纪花岗闪长岩体中的似玲珑式金矿床。通过对矿床地质特征的总结梳理,分析探讨了构造与成矿的关系。结果表明:三角顶金矿床矿体受不同构造控制,矿区内形成了含金石英脉型与含金硅化糜棱岩型2种矿石;岩体中弱变形域的张性节理、裂隙是含金石英脉的主要容矿、储矿空间,而北西向韧性剪切带控制了含金硅化糜棱岩型矿(化)体的产出。相应的控矿构造是今后找矿主线。
Sanjiaoding Gold Deposit is a Linglong-like type gold deposit hosted within an Ordovician granodiorite pluton newly discovered in recent years on the north margin of Qaidam Basin.Based on summary of the geological characteristics of the deposit,this paper analyzed and discussed the relationship between structures and gold mineralization.The results show that the orebody of Sanjiaoding Gold Deposit is controlled by different structures,and 2 types of ores,that is gold-bearing quartz vein type and gold-bearing silicified mylonite type,are formed in the district;the tensile joints developed within the weakly deformed area in the rock mass are the main ore host and storage space for gold-bearing quartz veins,while the NW-striking ductile shear zone controls the formation of gold-bearing silicified mylonite-type ore(mineralized)bodies.The corresponding ore-controlling structures are the priorities of future prospecting.
作者
逯永卓
韩杰
张鑫利
张启龙
Lu Yongzhuo;Han Jie;Zhang Xinli;Zhang Qilong(Qinghai Geological Survey Institute;Key Laboratory of the Northern Qinghai-Tibet Plateau Geological Processes and Mineral Resources)
出处
《黄金》
CAS
2021年第11期22-26,共5页
Gold
基金
中央地质勘查基金“青藏专项”项目(12120114047701)
青海省地质勘查基金项目(2018137044kc008)。
关键词
构造形态
矿石类型
张性节理
韧性剪切带
三角顶金矿床
structural morphology
ore type
tensile joints
ductile shear zone
Sanjiaoding Gold Deposit
