| 皖南地区歙县岩群昌前岩组和昱岭关群井潭组凝灰岩SHRIMP锆石U-Pb年龄及其地质意义 |
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| 引用本文： | 龚成强,张恒,丁孝忠,高林志.皖南地区歙县岩群昌前岩组和昱岭关群井潭组凝灰岩SHRIMP锆石U-Pb年龄及其地质意义[J].岩石矿物学杂志,2019,38(4):465-476. |
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| 作者姓名： | 龚成强 张恒 丁孝忠 高林志 |
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| 作者单位： | 中国地质大学(北京)地球科学与资源学院;中国地质科学院地质研究所 |
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| 基金项目： | 中国地质调查局地质调查项目（DD20190370）；科技部基金项目（2015FY310100） |
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| 摘 要： | 江南造山带东北段歙县岩群和昱岭关群是皖南地区重要的前寒武纪地层单元。本文对皖南地区歙县岩群昌前岩组和昱岭关群井潭组凝灰岩样品中的锆石进行了测年研究,获得昌前岩组凝灰岩SHRIMP锆石U-Pb年龄为852±6 Ma和840±11 Ma,井潭组凝灰岩SHRIMP锆石U-Pb年龄为809±10 Ma,为皖南地区新元古代地层格架的建立和地层的对比增添了可靠的年代学依据。根据最新获得的锆石U-Pb年龄数据,确定歙县岩群的时代与江南造山带区域范围内梵净山群、四堡群、冷家溪群、双桥山群以及溪口岩群相当,其上覆的昱岭关群与下江群、丹洲群、板溪群、马涧桥组、登山群以及上墅组等地层单元可以对比。
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| 关 键 词： | 皖南地区 歙县岩群 昱岭关群 凝灰岩 SHRIMP锆石U-Pb年龄 |
| 收稿时间： | 2018/10/29 0:00:00 |
Zircon SHRIMP U-Pb dating of tuffaceous bed from the Changqian Formation, Shexian Group and the Jingtan Formation, Yulingguan Group in Anhui Province and its stratigraphic implication |
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| GONG Cheng-qiang,ZHANG Heng,DING Xiao-zhong and GAO Lin-zhi.Zircon SHRIMP U-Pb dating of tuffaceous bed from the Changqian Formation, Shexian Group and the Jingtan Formation, Yulingguan Group in Anhui Province and its stratigraphic implication[J].Acta Petrologica Et Mineralogica,2019,38(4):465-476. |
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| Authors: | GONG Cheng-qiang ZHANG Heng DING Xiao-zhong and GAO Lin-zhi |
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| Institution: | School of Earth Sciences and Resources, 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,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 Shexian Group and the Yulingguan Group are important Precambrian stratigraphic units in the northeastern part of the Jiangnan orogenic belt. Zircon dating ages of tuff bedding from the Changqian Formation (852±6 Ma, 840±11 Ma) and the Jingtan Formation (809±10 Ma) in south Anhui Province are reported in this paper, which constrain the ages of the Shexian and Yulingguan Groups, adding some reliable age basis to the correlation of the Neoproterozoic strata in southern Anhui Province. Integrating a large number of high precision dating data obtained from the Jiangnan orogenic belt in recent years, the authors have reached the conclusion that the Shexian Group is equivalent to the Fanjingshan Group, the Sibao Group, the Lengjiaxi Group, the Shuangqiaoshan Group, and the Xikou Group. And the Yulingguan Group, overlying the Shexian Group, is equivalent to the Xiajiang Group, the Danzhou Group, the Banxi Group, the Majianqiao Formation, the Dengshan Group, and the Shangshu Formation. |
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| Keywords: | southern Anhui Province Shexian Group Yulingguan Group tuff zircon SHRIMP U-Pb dating |
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