蒋斌斌,邹滔,祝新友

• 1:北京矿产地质研究院有限责任公司
• 2:中色紫金地质勘查(北京)有限责任公司

摘要(Abstract)：

毛盖吐锡矿点为北京矿产地质研究院在大兴安岭南段新发现的矿点，位于内蒙古克什克腾旗境内。矿点地处大兴安岭中南段多金属成矿带，矿化类型为锡石石英脉型。矿石矿物主要为锡石和少量闪锌矿、方铅矿、黄铜矿以及银的矿物，脉石矿物主要为石英以及少量的萤石。该矿由于首次发现，研究程度较低，关于其矿床成因、成矿时代等规律尚不明确。大兴安岭中南段多金属成矿带上发育多个锡多金属矿床，目前的研究表明这些锡多金属矿床的成矿年龄多集中在早白垩世，成因与早白垩世花岗岩相关。为了研究毛盖吐锡矿与区域锡多金属成矿作用的联系，开展了对毛盖吐锡矿点成矿时代的研究，本研究选取1件石英脉型锡矿石样品进行LA-ICP-MS锡石U-Pb定年，获得锡石的~(207)Pb/~(206)Pb-~(238)U/~(206)Pb谐和年龄为130.2±3.4 Ma(MSWD=2.9),表明毛盖吐锡矿点形成于早白垩世，这与区域上主要的锡多金属矿床成矿时代一致，说明在大兴安岭中南段寻找锡多金属矿床拥有很好的前景。

关键词(KeyWords)： 锡石U-Pb年龄;毛盖吐锡矿;内蒙古;大兴安岭中南段

Abstract:

Keywords:

基金项目(Foundation): 国家重点研发计划“深地资源勘查开采”重点专项项目所属课题(2017YFC0601305;2017YFC0602403)

作者(Author): 蒋斌斌,邹滔,祝新友

DOI: 10.19509/j.cnki.dzkq.2022.0068

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