牟军,强希润,覃永军,王安华,张厚松.贵州铜仁瓦屋牛蹄塘组下部凝灰岩锆石年龄及其地质意义[J].贵州地质,2022,39(1):39-47
贵州铜仁瓦屋牛蹄塘组下部凝灰岩锆石年龄及其地质意义
Zircon Age of Tuff in the Lower Niutitang Formation and Its Geological Significance in Wawu, Tongren of Guizhou
投稿时间:2020-03-09  
DOI:
中文关键词:  成岩年龄  锆石U-Pb年龄  牛蹄塘组  早寒武世早期  贵州铜仁
英文关键词:Diagenetic age  Zircon U-Pb age  Niutitang Formation  Early early Cambrian  Guizhou  Tongren
基金项目:中国地质调查局“贵州1∶5万漾头司、万山特区、瓦屋、新晃4幅区域地质矿产调查” 项目(项目编码1212010100
作者单位
牟军 贵州省地质调查院贵州贵阳550081 
强希润 贵州省地质调查院贵州贵阳550081 
覃永军 贵州省地质矿产勘查开发局贵州贵阳550003
自然资源部基岩矿产资源勘查工程技术创新中心贵州贵阳550081 
王安华 贵州省地质调查院贵州贵阳550081 
张厚松 贵州省地质调查院贵州贵阳550081 
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中文摘要:
      运用LA-ICP-MS技术,对牛蹄塘组凝灰岩夹层进行锆石U-Pb年代学测试,获得凝灰岩的年龄为5463±43 Ma,该年龄与Chen等(2003)运用Pb-Pb淋滤法获得的遵义中南和织金牛蹄塘组黑色页岩的沉积年龄(531±24 Ma)在误差范围内一致,与卓皆文等(2009)运用锆石U-Pb年代学获得铜仁坝黄震旦纪老堡组顶部晶屑凝灰岩的年龄(556±5Ma)比较,二者与地层沉积时序一致,年龄跨度也很合理;与许多学者对华南早寒武世早期“多元素富集层”的Re-Os同位素定年结果一致,暗示“多元素富集层”的成矿物质来源可能与这期火山作用密切相关。
英文摘要:
      By using LA-ICP-MS technology,zircon U-Pb chronology of tuff intercalation of Niutitang formation is tested,it’s known the age of tuff is 5463 ± 43 Ma,which is consistent with the sedimentary age (531 ± 24 Ma) of black shale of Zhongnan in Zunyi and Niutitang Formation in Zhijin obtained by Chen et al(2003) using Pb Pb leaching method,which is consistent with Zhuo Junwen et al(2009) The 556 ± 5 Ma zircon U-Pb age measured in the detrital tuff at the top of Laobao formation of huangsinian in tongrenba is consistent with the stratigraphic sedimentary time series,and the age span is also very reasonable;It is consistent with the Re-Os isotopic dating results of “multi-element enrichment layer” in early Early Cambrian in South China by many scholars,suggesting that the metallogenic material source of “multi-element enrichment layer” may be closely related to this stage of volcanism
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