| 张雪亭.东昆仑南坡埃坑北花岗斑岩的成岩年龄及其地质意义[J].地质与勘探,2017,53(4):680-685 |
| 东昆仑南坡埃坑北花岗斑岩的成岩年龄及其地质意义 |
| Diagenesis age of the granite porphyry in northern Aikengdelesite south of East Kunlun and geological implications |
| 投稿时间：2016-11-09 修订日期：2017-06-06 |
| DOI： |
| 中文关键词: 成岩年龄 花岗斑岩 埃坑 东昆仑 |
| 英文关键词: diagenesis age, granite porphyry, Aikengdelsite, East Kunlun |
| 基金项目:青海省国土资源厅地勘基金项目（QGTZG2011-18）资助 |
|
| 摘要点击次数: 2507 |
| 全文下载次数: 1153 |
| 中文摘要: |
| 东昆仑南坡埃坑北花岗斑岩位于青海省都兰县诺木洪镇南八宝滩以南、马尔争以北的埃坑德勒斯特沟中游一带埃坑铜钼矿带的北矿区，其大地构造位置属于东昆仑南坡俯冲增生杂岩带中生代弧后前陆盆地，是古特提斯北部活动陆缘的南部边缘区域，也是广义的东昆仑岩浆弧构造带的组成部分。该斑岩体是埃坑铜钼矿的围岩和成矿母岩，花岗斑岩体的LA-ICP-MS锆石U-Pb成岩年龄为242±1.2Ma，推测斑岩型铜钼矿成矿时代应为中三叠世—晚三叠世早期。这一成果对该带斑岩型铜钼矿的找矿勘查工作有一定指导意义。 |
| 英文摘要: |
| The granite porphyry in northern Aikengdelsite on the south slope of East Kunlun is located in the north mining area of Aikengdelsite copper-molybdenum ore, middle Aikengdelsite Region, south of Babaotan, and north of Ma’erzheng, Nomuhong Town, Dulan County, Qinghai Province. In tectonic setting, this place is in a back-arc foreland basin of Mesozoic with subduction-accretion complex belts on the southern slope of East Kunlun, as well as the south edge of the northern Paleo-Tethys active continental margin. It is also part of the generalized magma arc tectonic zone of East Kunlun. The porphyry mass is the surrounding rock of Aikengdelsite copper-molybdenum ore and mineralization mother rock. By LA-ICP-MS SHRIMP zircon U-Pb dating, the granitic porphyry mass has the diagenesis age of 242±1.2Ma. It is inferred that the metallogenetic epoch of the porphyry-type copper-molybdenum ore is in Middle Triassic and early Late Triassic. This result would provide some guidance for geological exploration of porphyry-type copper-molybdenum ore in this area. |
|
查看全文
查看/发表评论 下载PDF阅读器 |
| 关闭 |
