| 江西及广东北部侏罗系—白垩系岩石地层格架和地质时代 |
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| 引用本文： | 巫建华,韦昌袭,郭恒飞,郭国林,刘帅.江西及广东北部侏罗系—白垩系岩石地层格架和地质时代[J].高校地质学报,2019,25(2):309. |
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| 作者姓名： | 巫建华 韦昌袭 郭恒飞 郭国林 刘帅 |
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| 作者单位： | 东华理工大学核资源与环境国家重点实验室,南昌330013;东华理工大学地球科学学院,南昌330013;东华理工大学地球科学学院,南昌,330013;东华理工大学核资源与环境国家重点实验室,南昌,330013 |
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| 基金项目： | 国家自然科学基金;中国核工业集团公司项目 |
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| 摘 要： | 根据地层发育程度和岩石组合特征，以萍乡-广丰深断裂和三南（全南、龙南、定南） -寻乌深断裂为界，可将江
西及广东北部侏罗系-白垩系划分为北部、中部、南部三个地层分区。根据不整合面和岩石组合特征，以群级岩石地层单
位与火山旋回或沉积旋回相对应为原则，北部地层分区可划分出林山群、火把山群和龟峰群；中部地层分区可划分出林山
群、武夷群、罗塘群和龟峰群；南部地层分区可划分出余田群、武夷群、兴宁群和南雄群。根据岩性岩相特征，以组级岩
石地层单位与沉积岩相或火山岩相组合相对应为原则，林山群可划分为水北组和罗坳组，余田群可划分为水头迳组、菖蒲
组和翰岗组，武夷群划分为双峰岭组、鹅湖岭组和石溪组，兴宁群划分为合水组和优胜组，罗塘群划分为白埠组、周田组
和邓家组，火把山群划分为丘家组、天台山组、冷水坞组和周家店组，龟峰群划分为河口组、塘边组和莲荷组，南雄群划
分为大凤组、主田组和浈水组。根据火山岩锆石U-Pb年龄数据和化石资料，余田群和林山群属相变关系，地质时代属早侏
罗世-中侏罗世早期。武夷群属早白垩世早期，火把山群属早白垩世中期，罗塘群属早白垩世晚期，兴宁群属早白垩世晚
期-晚白垩世早期，龟峰群和南雄群属相变关系，地质时代属晚白垩世中晚期。通过岩性岩相对比，结合火山岩锆石U-Pb
年龄数据，鹰潭冷水坑矿区的火山岩系属早白垩世早期武夷群，广东始兴-江西全南原武夷群火山岩系属晚奥陶世-早志
留世早期龙头寨群。
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| 关 键 词： | 岩石地层 地质时代 侏罗纪—白垩纪 江西及广东北部 |
Stratigraphical Framework and Geochronology of the Jurassic-Cretaceous in Jiangxi Province and Northern Guangdong Province |
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| WU Jianhua,WEI Changxi,GUO Hengfei,GUO Guolin,LIU Shuai.Stratigraphical Framework and Geochronology of the Jurassic-Cretaceous in Jiangxi Province and Northern Guangdong Province[J].Geological Journal of China Universities,2019,25(2):309. |
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| Authors: | WU Jianhua WEI Changxi GUO Hengfei GUO Guolin LIU Shuai |
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| Abstract: | Based on the degree of stratigraphical development and characteristics of rock associations, the Jurassic-Cretaceous strata
in Jiangxi Province and Northern Guangdong Province can be subdivided into northern, central and southern district bounded by the
Pingxiang-Guangfeng fault and Sannan (Quannan, Longnan and Dingnan)-Xunwu fault. Based on the unconformity and rock
associations and the assumption that “Group” corresponds to volcanic or sedimentary cycles, the northern stratigraphical district can
be subdivided into Linshan Group, Huobashan Group, and Guifeng Group; the central stratigraphical district can be subdivided into
Linshan Group, Wuyi Group, Luotang Group, and Guifeng Group; the southern stratigraphical district can be subdivided into Yutian
Group, Wuyi Group, Xingning Group, and Nanxiong Group. According to the lithology and lithofacies and the assumption that a
formation corresponds to a sedimentary lithofacies or volcanic lithofacies association, the Linshan Group can be subdivided into
Shuibei Formation (Fm) and Luoao Fm; the Yutian Group into the Shuitoujing Fm, Changpu Fm and Hangang Fm; the Wuyi Group into
Shuangfengling Fm, Ehuling Fm, and Shixi Fm; the Xingning Group into Heshui Fm and Yousheng Fm; the Luotang Group into the
Baibu Fm, Zhoutian Fm, and Dengjia Fm; the Huobashan Group into the Qiujia Fm, Tiantaishan Fm, Lengshuiwu Fm, and Zhoujiadian
Fm; the Guifeng Group into the Hekou Fm, Tangbian Fm, and Lianhe Fm and the Nanxiong Group into the Dafeng Fm, Zhutian Fm,
and Zhenshui Fm. Fossil data and zircon U-Pb ages show that the Yutian Group and Linshan Group belong to the Early Jurassic-early
Middle Jurassic, the Wuyi Group to early Early Cretaceous, the Huobashan Group to middle Early Cretaceous, the Luotang Group to
late Early Cretaceous, the Xingning Group to early Late Cretaceous-early Late Cretaceous, the Guifeng Group and the Nanxiong Group
belong to late Late Cretaceous. The contrast in lithology and lithofacies, together with zircon U-Pb age data of the volcanic rocks , the
volcanic series belong to the Wuyi Group of the early Early Cretaceous in the Lengshuikeng mining area, and the volcanic series of the
original the Wuyi Groupis belong to the Longtouzhai Group of the Late Ordovician-early Early Silurian in Shixing (Guangdong
Province)-Quannan (Jiangxi Province). |
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| Keywords: | iithostratigraphy geochronology Jurassic-Cretaceous system Jiangxi Province and northern Guangdong Province |
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