| 西藏冈底斯南缘汤白矿区早侏罗世含矿斑岩锆石U-Pb定年及其地质意义 |
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| 引用本文： | 白云,郎兴海,王旭辉,崔志伟,谢富伟,邓煜霖,李志军,娄渝明,韩鹏,尹青,王子正,董树义,张忠,张金树,姜楷.西藏冈底斯南缘汤白矿区早侏罗世含矿斑岩锆石U-Pb定年及其地质意义[J].地质通报,2019,38(4):509-521. |
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| 作者姓名： | 白云 郎兴海 王旭辉 崔志伟 谢富伟 邓煜霖 李志军 娄渝明 韩鹏 尹青 王子正 董树义 张忠 张金树 姜楷 |
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| 作者单位： | 成都理工大学地球科学学院/自然资源部构造成矿成藏重点实验室, 四川 成都 610059;四川省冶金地质勘查局六〇五大队, 四川 眉山 620860,成都理工大学地球科学学院/自然资源部构造成矿成藏重点实验室, 四川 成都 610059,成都理工大学地球科学学院/自然资源部构造成矿成藏重点实验室, 四川 成都 610059,重庆地质矿产研究院, 重庆 401120,中国地质科学院矿产资源研究所, 北京 100037,成都理工大学地球科学学院/自然资源部构造成矿成藏重点实验室, 四川 成都 610059,成都理工大学地球科学学院/自然资源部构造成矿成藏重点实验室, 四川 成都 610059,成都理工大学地球科学学院/自然资源部构造成矿成藏重点实验室, 四川 成都 610059,成都理工大学地球科学学院/自然资源部构造成矿成藏重点实验室, 四川 成都 610059,成都理工大学地球科学学院/自然资源部构造成矿成藏重点实验室, 四川 成都 610059,中国地质调查局成都地质调查中心, 四川 成都 610081,成都理工大学地球科学学院/自然资源部构造成矿成藏重点实验室, 四川 成都 610059,西藏天圆矿业资源开发有限公司, 西藏 日喀则 857000,西藏大学工学院, 西藏 拉萨 850012,西藏天圆矿业资源开发有限公司, 西藏 日喀则 857000 |
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| 基金项目： | 国家重点研发计划项目《冈底斯东段斑岩成矿系统深部预测评价与靶区优选》（编号：2018YFC0604105）、国家自然科学基金项目《西藏雄村斑岩型Cu-Au矿集区Ⅰ号矿体富CH4成矿流体演化过程研究》（批准号：41502079）和中国地质调查局项目《中国矿产地质与成矿规律综合集成和服务》（编号：DD20160346） |
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| 摘 要： | 汤白矿区位于西藏冈底斯斑岩铜矿带西段南缘,南侧紧邻日喀则弧前盆地。矿区由地表探矿工程控制3条赋存于早侏罗世角闪石英闪长斑岩中的主矿体(1号、2号和3号),在野外地质调查的基础上,对角闪石英闪长斑岩进行LA-ICP-MS锆石U-Pb定年和岩石地球化学测试。研究结果表明:(1)含矿斑岩的成岩年龄为183.3±1.2Ma,形成于早侏罗世;(2)含矿斑岩地球化学特征与大洋岛弧背景下的安山质岩石的地球化学性质一致,表明汤白矿区含矿斑岩形成于大洋岛弧环境;(3)西藏冈底斯斑岩铜矿带具有寻找俯冲期斑岩型矿床的巨大潜力,今后应加强该带俯冲期斑岩型矿床的勘查评价工作,特别是早—中侏罗世斑岩的成矿潜力评价。
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| 关 键 词： | 西藏 冈底斯 汤白 斑岩型矿床 构造背景 |
| 收稿时间： | 2017/8/14 0:00:00 |
| 修稿时间： | 2017/10/20 0:00:00 |
Zircon U-Pb geochronology and geological implication of Early Jurassic ore-bearing porphyry from the Tangbai area on the southern margin of Gangdise, Tibet |
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| BAI Yun,LANG Xinghai,WANG Xuhui,CUI Zhiwei,XIE Fuwei,DENG Yulin,LI Zhijun,LOU Yuming,HAN Peng,YIN Qing,WANG Zizheng,DONG Shuyi,ZHANG Zhong,ZHANG Jinshu and JIANG Kai.Zircon U-Pb geochronology and geological implication of Early Jurassic ore-bearing porphyry from the Tangbai area on the southern margin of Gangdise, Tibet[J].Geologcal Bulletin OF China,2019,38(4):509-521. |
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| Authors: | BAI Yun LANG Xinghai WANG Xuhui CUI Zhiwei XIE Fuwei DENG Yulin LI Zhijun LOU Yuming HAN Peng YIN Qing WANG Zizheng DONG Shuyi ZHANG Zhong ZHANG Jinshu and JIANG Kai |
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| Affiliation: | College of Earth Science, Chengdu University of Technology/MNR Key Laboratory of Tectonic Controls on Mineralization and Hydrocarbon Accumulation, Chengdu 610059, Sichuan, China;The 605 Brigade, Sichuan Province Metallurgy Geological Bureau, Meishan 620860, Sichuan, China,College of Earth Science, Chengdu University of Technology/MNR Key Laboratory of Tectonic Controls on Mineralization and Hydrocarbon Accumulation, Chengdu 610059, Sichuan, China,College of Earth Science, Chengdu University of Technology/MNR Key Laboratory of Tectonic Controls on Mineralization and Hydrocarbon Accumulation, Chengdu 610059, Sichuan, China,Chongqing Institute of Geology and Mineral Resources, Chongqing 401120, China,Institute of Mineral Resources, Chinese Academy of Geological Sciences, Beijing 100037, China,College of Earth Science, Chengdu University of Technology/MNR Key Laboratory of Tectonic Controls on Mineralization and Hydrocarbon Accumulation, Chengdu 610059, Sichuan, China,College of Earth Science, Chengdu University of Technology/MNR Key Laboratory of Tectonic Controls on Mineralization and Hydrocarbon Accumulation, Chengdu 610059, Sichuan, China,College of Earth Science, Chengdu University of Technology/MNR Key Laboratory of Tectonic Controls on Mineralization and Hydrocarbon Accumulation, Chengdu 610059, Sichuan, China,College of Earth Science, Chengdu University of Technology/MNR Key Laboratory of Tectonic Controls on Mineralization and Hydrocarbon Accumulation, Chengdu 610059, Sichuan, China,College of Earth Science, Chengdu University of Technology/MNR Key Laboratory of Tectonic Controls on Mineralization and Hydrocarbon Accumulation, Chengdu 610059, Sichuan, China,Chengdu Center of China Geological Survey, Chengdu 610081, Sichuan, China,College of Earth Science, Chengdu University of Technology/MNR Key Laboratory of Tectonic Controls on Mineralization and Hydrocarbon Accumulation, Chengdu 610059, Sichuan, China,Tibet Tianyuan Minerals Exploration Ltd, Shigatse 857000, Tibet, China,College of Engineering, Tibet University, Lhasa 850012, Tibet, China and Tibet Tianyuan Minerals Exploration Ltd, Shigatse 857000, Tibet, China |
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| Abstract: | The Tangbai ore district, located in the western segment of the Gangdise porphyry copper belt. Its south margin is Xigaze forearc basin. The surface exploration engineering of the mining area revealed that there are three orebodies (No.1, 2 and 3) in Early Jurassic hornblende quartz diorite porphyry. On the basis of field geological investigation, the authors carried out zircon LA-ICPMS U-Pb dating and whole-rock geochemical testing of Early Jurassic hornblende quartz diorite porphyry. The results of the study are as follows. The age of ore-bearing porphyry is 183.3±1.2Ma, suggesting Early Jurassic; geochemical characteristics of ore-bearing porphyry are similar to those of andesite from the oceanic island arc setting, indicating that ore-bearing porphyry in Tangbai area was formed in the oceanic island arc setting, and the Gangdise porphyry copper belt has huge potential in the search for porphyry deposits of subduction period. It is therefore held that in the future work emphasis should be placed on the subduction stage porphyry deposit exploration and evaluation, especially on the Early-Middle Jurassic porphyry metallogenic potential evaluation. |
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| Keywords: | Tibet Gangdise Tangbai porphyry copper deposit tectonic setting |
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