【引用本文】 周雄, 周玉, 孙宝伟, 等. 四川甲基卡稀有金属矿床134号脉锡石U-Pb定年与地质意义[J]. 岩矿测试, 2021, 40(1): 156-164. doi: 10.15898/j.cnki.11-2131/td.202005060006
ZHOU Xiong , ZHOU Yu , SUN Bao-wei , et al. Cassiterite U-Pb Dating of No.134 Pegmatite Vein in the Jiajika Rare Metal Deposit, Western Sichuan and Its Geological Significances[J]. Rock and Mineral Analysis, 2021, 40(1): 156-164. doi: 10.15898/j.cnki.11-2131/td.202005060006

四川甲基卡稀有金属矿床134号脉锡石U-Pb定年与地质意义

1. 中国地质科学院矿产综合利用研究所, 四川 成都 610041;

2. 中国地质调查局稀土资源应用技术创新中心, 四川 成都 610041;

3. 中国地质调查局金属矿产资源综合利用技术研究中心, 四川 成都 610041;

4. 四川省地质矿产勘查开发局四〇五地质队, 四川 都江堰 611830

收稿日期: 2020-04-25  修回日期: 2020-07-14 

基金项目: 中国地质调查局地质调查项目(DD20190185)

作者简介: 周雄,博士,副研究员,矿物学、岩石学、矿床学专业。E-mail:zhouxiong27@163.com。。

Cassiterite U-Pb Dating of No.134 Pegmatite Vein in the Jiajika Rare Metal Deposit, Western Sichuan and Its Geological Significances

1. Institute of Multipurpose Utilization of Mineral Resources, Chinese Academy of Geological Sciences, Chengdu 610041, China;

2. Technology Innovation Center of Rare Earth Resources Application, China Geological Survey, Chengdu 610041, China;

3. Technology Innovation Center of Rare Earth Resources Development and Utilization, China Geological Survey, Chengdu 610041, China;

4. The 405 Geological Brigade of Sichuan Bureau of Geology & Mineral Resources, Dujiangyan 611830, China

Received Date: 2020-04-25
Revised Date: 2020-07-14

摘要:伟晶岩型锂矿是重要的新兴产业资源,具有重要的战略价值,是我国亟需紧缺的关键矿产。然而,成矿年代学制约了该类型锂矿的成矿作用和成矿机理研究。四川甲基卡稀有金属矿床是我国最大的锂矿床,以134号伟晶岩脉为典型代表。134号伟晶岩脉主要由锂辉石、钽铌铁矿、锆石、曲晶石、绿柱石、锡石、微斜长石、正长石、石英、白云母等组成。本文采集了134号脉中部矿石样品,分选获得锡石,通过LA-MC-ICP-MS锡石U-Pb测年,获得134号伟晶岩脉的锡石U-Pb年龄为203.7±4.6Ma(n=19,MSWD=2.8),代表了该伟晶岩型锂矿床的成矿年龄,表明其成矿作用发生在印支晚期。印支运动晚期稳定的构造环境,为稀有金属的聚集、成矿创造了有利条件,有助于形成甲基卡超大型稀有金属矿床。

关键词: 锡石U-Pb定年, 年代学, 伟晶岩型锂矿床, 甲基卡, 川西

Cassiterite U-Pb Dating of No.134 Pegmatite Vein in the Jiajika Rare Metal Deposit, Western Sichuan and Its Geological Significances

KEY WORDS: cassiterite U-Pb dating, geochronology, Jiajikapegmatitic lithium deposit, western Sichuan,

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Figures And Tables

四川甲基卡稀有金属矿床134号脉锡石U-Pb定年与地质意义

周雄, 周玉, 孙宝伟, 谭洪旗, 岳相元, 朱志敏