| 滇中北部昆阳群凝灰岩SHRIMP锆石U-Pb年龄及其地层学意义 |
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| 引用本文： | 刘昊岗,张恒,张传恒,高林志,刘燕学,张继彪.滇中北部昆阳群凝灰岩SHRIMP锆石U-Pb年龄及其地层学意义[J].地质通报,2019,38(7):1183-1190. |
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| 作者姓名： | 刘昊岗 张恒 张传恒 高林志 刘燕学 张继彪 |
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| 作者单位： | 中国地质大学(北京), 北京 100083;中国地质科学院地质研究所, 北京 100037,中国地质科学院地质研究所, 北京 100037,中国地质大学(北京), 北京 100083,中国地质科学院地质研究所, 北京 100037,中国地质科学院地质研究所, 北京 100037,中国地质科学院地质研究所, 北京 100037 |
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| 基金项目： | 中国地质调查局项目《全国地质构造区划与区域地质调查综合集成》（编号：DD20160345）、《中国及邻区海陆大地构造研究和相关图件编制》（编号：DD20160343）和科技部基金项目《中国标准地层建立——中国地层表的完善》（编号：2015FY310100） |
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| 摘 要： | 滇中昆阳群一直是华南前寒武纪地质研究的热点之一,其地层序列、时代与区域对比长期存在争议。通过对滇中易门县小街乡普家村-岔河水库剖面禄表组2个凝灰岩样品进行SHRIMP锆石U-Pb定年,获得禄表组凝灰岩的锆石206Pb/238U年龄为878.5±4.7Ma和878.0±4.0Ma,首次证实禄表组的形成时代为新元古代中期。禄表组凝灰岩SHRIMP锆石U-Pb年龄的获得,有利于正确认识昆阳群的划属关系,并为西南地区青白口纪地层格架的建立和对比提供可靠的年代学依据。
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| 关 键 词： | 昆阳群 禄表组 SHRIMP锆石U-Pb年龄 新元古代 滇中 |
| 收稿时间： | 2018/11/12 0:00:00 |
| 修稿时间： | 2019/1/29 0:00:00 |
SHRIMP zircon U-Pb age of the Kunyang Group in northern Central Yunnan Province and its stratigraphic significance |
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| LIU Haogang,ZHANG Heng,ZHANG Chuanheng,GAO Linzhi,LIU Yanxue and ZHANG Jibiao.SHRIMP zircon U-Pb age of the Kunyang Group in northern Central Yunnan Province and its stratigraphic significance[J].Geologcal Bulletin OF China,2019,38(7):1183-1190. |
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| Authors: | LIU Haogang ZHANG Heng ZHANG Chuanheng GAO Linzhi LIU Yanxue and ZHANG Jibiao |
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| Institution: | China University of Geosciences, Beijing 100083, China;Institute of Geology, Chinese Academy of Geological Sciences, Beijing 100037, China,Institute of Geology, Chinese Academy of Geological Sciences, Beijing 100037, China,China University of Geosciences, Beijing 100083, China,Institute of Geology, Chinese Academy of Geological Sciences, Beijing 100037, China,Institute of Geology, Chinese Academy of Geological Sciences, Beijing 100037, China and Institute of Geology, Chinese Academy of Geological Sciences, Beijing 100037, China |
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| Abstract: | The Kunyang Group in the Central Yunnan Province, whose stratigraphic sequence and stratigraphic correlation are controversial, are always the research focus of Precambrian geology. Two zircon dating ages (878.5±4.7Ma and 878.0±4.0Ma) of tuff bedding from the Lubiao Formation in Yimen County are reported in this paper. Zircon dating of tuff bedding indicates that the formation occurred in Middle Neoproterozoic, which is the first report from the Lubiao Formation. Combined with a large number of high precision ages obtained from Kunyang Group, these stratigraphic ages provide important evidence for the acceptable division of Kunyang Group, and also offer reliable chronological data for the setting up of the Qingbaikou System in Southwest China. |
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| Keywords: | Kunyang Group Lubiao Formation SHRIMP zircon U-Pb age Neoproterozoic Central Yunnan Province |
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