青海昆仑河北地区岩浆活动、金矿成矿特征及找矿前景分析
P611%P612; 青海昆仑河北地区靠近昆中断裂带,经历早古生代、 晚古生代—中生代多期岩浆活动,近年来自西至东陆续发现黑海北、拉陵灶火、苏海图、加祖它士西、向阳沟、加祖它士东、大灶火、黑刺沟等多个金矿床(点),形成一条东西长度近150 km长的成矿带.文章在总结带内金矿成矿基本特征基础上,选取黑海北金矿和加祖它士东金矿的赋矿围岩开展锆石U-Pb定年,结果显示黑海北硅化二长花岗岩锆石206Pb/238U加权平均年龄为443±8 Ma,形成于原特提斯洋向柴达木地块俯冲碰撞后伸展环境;加祖它士东的花岗闪长岩脉含有较多的继承锆石,锆石206Pb/238U加权平均年龄为250±1 Ma,继承锆石20...
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| Published in | 地质力学学报 Vol. 28; no. 3; pp. 383 - 405 |
|---|---|
| Main Authors | , , , , , , |
| Format | Journal Article |
| Language | Chinese |
| Published |
青海省柴达木综合地质矿产勘查院, 青海格尔木 816000
2022
青海省柴达木盆地盐湖资源勘探研究重点实验室, 青海格尔木 816099%青海省地质调查院, 青海西宁 810000 |
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| Online Access | Get full text |
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| Abstract | P611%P612; 青海昆仑河北地区靠近昆中断裂带,经历早古生代、 晚古生代—中生代多期岩浆活动,近年来自西至东陆续发现黑海北、拉陵灶火、苏海图、加祖它士西、向阳沟、加祖它士东、大灶火、黑刺沟等多个金矿床(点),形成一条东西长度近150 km长的成矿带.文章在总结带内金矿成矿基本特征基础上,选取黑海北金矿和加祖它士东金矿的赋矿围岩开展锆石U-Pb定年,结果显示黑海北硅化二长花岗岩锆石206Pb/238U加权平均年龄为443±8 Ma,形成于原特提斯洋向柴达木地块俯冲碰撞后伸展环境;加祖它士东的花岗闪长岩脉含有较多的继承锆石,锆石206Pb/238U加权平均年龄为250±1 Ma,继承锆石206Pb/238U加权平均年龄为420±2 Ma,加祖它士东花岗闪长岩侵位于古特提斯洋向北俯冲背景下的大陆弧构造环境.综合分析认为昆仑河北地区金矿成矿作用与早中生代三叠纪岩浆活动关系更为密切,其矿床类型存在造山型金矿与岩浆热液型金矿两种不同认识.昆仑河北地区土壤化探异常、低阻高极化激电异常、主要断裂(穿矿区)的次级断裂形成的蚀变破碎带等可以作为区内主要的找矿标志,推测该成矿带具有较大的找矿前景. |
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| AbstractList | P611%P612; 青海昆仑河北地区靠近昆中断裂带,经历早古生代、 晚古生代—中生代多期岩浆活动,近年来自西至东陆续发现黑海北、拉陵灶火、苏海图、加祖它士西、向阳沟、加祖它士东、大灶火、黑刺沟等多个金矿床(点),形成一条东西长度近150 km长的成矿带.文章在总结带内金矿成矿基本特征基础上,选取黑海北金矿和加祖它士东金矿的赋矿围岩开展锆石U-Pb定年,结果显示黑海北硅化二长花岗岩锆石206Pb/238U加权平均年龄为443±8 Ma,形成于原特提斯洋向柴达木地块俯冲碰撞后伸展环境;加祖它士东的花岗闪长岩脉含有较多的继承锆石,锆石206Pb/238U加权平均年龄为250±1 Ma,继承锆石206Pb/238U加权平均年龄为420±2 Ma,加祖它士东花岗闪长岩侵位于古特提斯洋向北俯冲背景下的大陆弧构造环境.综合分析认为昆仑河北地区金矿成矿作用与早中生代三叠纪岩浆活动关系更为密切,其矿床类型存在造山型金矿与岩浆热液型金矿两种不同认识.昆仑河北地区土壤化探异常、低阻高极化激电异常、主要断裂(穿矿区)的次级断裂形成的蚀变破碎带等可以作为区内主要的找矿标志,推测该成矿带具有较大的找矿前景. |
| Author | 鲁海峰 雷延祥 康继祖 彭建 焦和 贾建团 黄国彪 |
| AuthorAffiliation | 青海省柴达木综合地质矿产勘查院, 青海格尔木 816000;青海省柴达木盆地盐湖资源勘探研究重点实验室, 青海格尔木 816099%青海省地质调查院, 青海西宁 810000 |
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| Author_FL | HUANG Guobiao LEI Yanxiang KANG Jizu PENG Jian JIAO He LU Haifeng JIA Jiantuan |
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| DocumentTitle_FL | Magmatism, metallogenic characteristics, and prospecting prediction for gold deposits in the north of Kunlun River area, Qinghai, China |
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| Keywords | 金矿成矿特征 锆石U-Pb年龄 东昆仑 昆仑河北地区 岩浆活动 |
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| Title | 青海昆仑河北地区岩浆活动、金矿成矿特征及找矿前景分析 |
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