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新疆大学地质与矿业工程学院
Published:2021
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[1]张雪冰,包长甲,吴世山.大兴安岭南段道伦达坝铜钨多金属矿床年代学研究:来自石英包裹体~(40)Ar-~(39)Ar年龄的证据[J].新疆大学学报(自然科学版)(中英文),2021,38(01):83-90.
[1]张雪冰,包长甲,吴世山.大兴安岭南段道伦达坝铜钨多金属矿床年代学研究:来自石英包裹体~(40)Ar-~(39)Ar年龄的证据[J].新疆大学学报(自然科学版)(中英文),2021,38(01):83-90. DOI: 10.13568/j.cnki.651094.651316.2019.12.25.0001.
DOI:10.13568/j.cnki.651094.651316.2019.12.25.0001.
道伦达坝铜钨多金属矿床位于大兴安岭南段西坡中部
矿体形态规模受断裂构造控制
矿床成因类型为中高温热液脉型.本文应用双真空分步加热炉对钨锡矿化伴生的石英中流体包裹体开展40Ar-39Ar定年研究
得到黑钨矿-锡石-石英脉中石英样品(DL)流体包裹体40Ar-39Ar反等时线年龄为(140.6±2.2) Ma
与前人获得的LA-ICP-MS锡石U-Pb年龄(134.7~136.8 Ma)趋于一致
指示石英包裹体40Ar-39Ar年龄具有较好的地质意义
表明应用分步加热技术对含有富钾流体包裹体的石英矿物开展40Ar-39Ar定年研究可以获得有效的年龄结果.
The Daolundaba Cu-W polymetallic deposit
located in the middle part of the west slope of SGXR
is a hydrothermal vein type deposit controlled by fractures
and Cu-W orebodies hosted in silty slate and biotite granite.In this study
we analyzed quartz crystals coeval with wolframite mineralization with an Argus Ⅵ noble gas mass spectrometer using the furnace step-heated technique
and provide chronological data for metallogenic theory studies.Fluid inclusion 40Ar-39Ar dating of quartz samples(DL) from wolframite ± cassiterite-quartz vein yields an inverse isochron age of(140.6±2.2)Ma.The inverse isochron age is good agreement with LA-ICP-MS cassiterite U-Pb ages indicates that the 40Ar-39Ar ages for quartz is geologically meaningful.Moreover
this study shows that the 40Ar-39Ar step-heated technique is effective for analyzing quartz with ingrown K-rich fluid inclusions and yield meaningful 40Ar-39Ar age.
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