|
|||||
|
|
| 西藏邦铺钼(铜)矿床含矿二长花岗斑岩LA-ICP-MS锆石U-Pb定年及地质意义 | |
| 引用本文： | 王立强,唐菊兴,陈毓川,冷秋锋,罗茂澄,陈伟,王焕.西藏邦铺钼(铜)矿床含矿二长花岗斑岩LA-ICP-MS锆石U-Pb定年及地质意义[J].矿床地质,2011,30(2):349-360. |
| 作者姓名： | 王立强 唐菊兴 陈毓川 冷秋锋 罗茂澄 陈伟 王焕 |
| 作者单位： | 1. 中国地质科学院矿产资源研究所,国土资源部成矿作用与资源评价重点实验室,北京,100037 2. 中国地质大学地球科学与资源学院,北京,100083 3. 成都理工大学地球科学学院,四川成都,610059 |
| 基金项目： | 本文为国家基础研究计划“973”项目（2011CB403103）、国土资源部公益性行业科研专项（200911007-02）和中国地质调查局青藏高原专项（1212010012005）共同资助的成果 |
| 摘 要： | 邦铺斑岩型钼(铜)矿床位于甲玛铜多金属矿床北东约30 km处,与钼(铜)成矿有关的岩体主要为二长花岗斑岩,次为花岗闪长斑岩及闪长(玢)岩.通过对二长花岗斑岩体进行LA-ICP-MS锆石U-Pb年龄测试,获得了含矿母岩的年龄,二长花岗斑岩的26颗锆石206Pb/238U加权平均年龄为(16.23±0.19)Ma(MSWD... |
| 关 键 词： | 地球化学 LA-ICP-MS 锆石U-Pb定年 二长花岗斑岩 邦铺 冈底斯 西藏 |
LA-ICP-MS zircon U-Pb dating of ore-bearing monzogranite porphyry in Bangpu molybdenum (copper) deposit, Tibet and its significance |
|
| WANG LiQiang,TANG JuXing,CHEN YuChuan,LUO MaoCheng,LENG QiuFeng,CHEN Wei,WANG Huan.LA-ICP-MS zircon U-Pb dating of ore-bearing monzogranite porphyry in Bangpu molybdenum (copper) deposit, Tibet and its significance[J].Mineral Deposits,2011,30(2):349-360. | |
| Authors: | WANG LiQiang TANG JuXing CHEN YuChuan LUO MaoCheng LENG QiuFeng CHEN Wei WANG Huan |
| Institution: | WANG LiQiang1,TANG JuXing1,CHEN YuChuan1,LUO MaoCheng2,LENG QiuFeng3,CHEN Wei3 and WANG Huan1(1 MLR Key laboratory of Metallogeny and Mineral Assessment,Institute of Mineral Resources,Chinese Academy of Geological Sciences,Beijing 100037,China,2 School of Earth Sciences and Resources,China University of Geosciences,Beijing 100083,3 College of Earth Sciences,Chengdu University of Technology,Chengdu 610059,Sichuan,China) |
| Abstract: | The Bangpu porphyry Mo (Cu) deposit is located about 30 km northeast of the Jiama copper polymetallic deposit. The rocks related to molybdenum mineralization in this ore deposit are mainly monzogranite porphyry, with minor granodiorite porphyry and diorite (porphyrite). The age of the ore-forming rock was obtained through LA-ICP-MS precise determination of the zircon U-Pb age for the molybdenite_bearing monzogranite porphyry. 26 zircons from the monzogranite porphyry yielded the weighted average 206Pb/238U age of (16.23±0.19) Ma (MSWD=2.0, n=26), suggesting Miocene granitic magma emplacement in the Gangdese belt. The previous dating of the molybdenite from this ore deposit had yielded a Re-Os isochron age of (15.32±0.79) Ma, which is about 1 Ma later than the time of rock cooling. Thus the authors' work has improved the constraint of mineralization in time. Regional minerogenetic regularity shows that the Bangpu porphyry Mo (Cu) polymetallic deposit has an uniformity with the regional porphyry-skarn deposits (such as Jiama, Qulong and other ore deposit in this region) in the age of petrogenesis and mineralization, which shows that this ore deposit has the same tectonic and magmic geochemical dynamic background as other ore deposits in this region, and that this ore deposit was a product of mineralization explosion during the extension phase after India-Asia continental collision. |
| Keywords: | geochemistry LA-ICP-MS zircon U-Pb dating monzogranite porphyry Bangpu Gangdese Tibet |
| 本文献已被 CNKI 万方数据 等数据库收录！ | |
| 点击此处可从《矿床地质》浏览原始摘要信息 | |
| 点击此处可从《矿床地质》下载免费的PDF全文 | |