地学前缘 ›› 2016, Vol. 23 ›› Issue (6): 236-245.DOI: 10.13745/j.esf.2016.06.016

• 前寒武纪地质及早期生命—环境相互作用 • 上一篇    下一篇

湖北神农架西部南华纪地层序列及其区域对比

官开萍，田力，安志辉，叶琴，胡军，童金南   

  1. 1.中国地质大学(武汉) 生物地质与环境地质国家重点实验室, 湖北 武汉 430074 2. 中国地质大学(武汉) 地球科学学院, 湖北 武汉 430074 3. 中国地质调查局 武汉地质调查中心, 湖北 武汉 430205
  • 收稿日期:2016-09-25 修回日期:2023-06-30 出版日期:2016-11-15 发布日期:2016-11-15
  • 通讯作者: 童金南(1962—)，男，教授，长期从事古生物学与地层学研究。E-mail：jntong@cug.edu.cn
  • 作者简介:官开萍(1993—)，男，硕士研究生，地质学专业，主要从事新元古代地层学研究。E-mail：kaipingg@126.com
  • 基金资助:

    中国地质调查局地质调查工作项目“神农架雪峰山地区区域地质专项调查”(12120114066301)

Stratigraphic succession of the Nanhuan Period in the Shennongjia area in western Hubei and its regional correlation.

GUAN Kaiping，TIAN Li，AN Zhihui，YE Qin,，HU Jun，TONG Jinnan   

  1. 1.State Key Laboratory of Biogeology and Environmental Geology, China University of Geosciences(Wuhan), Wuhan 430074, China 2. School of Earth Science, China University of Geosciences(Wuhan), Wuhan 430074, China 3. Wuhan Center of Geological Survey, China Geological Survey, Wuhan 430205, China
  • Received:2016-09-25 Revised:2023-06-30 Online:2016-11-15 Published:2016-11-15

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摘要：

新元古代是地质历史时期气候变化最为剧烈的时期之一，在全球范围内留下了多次明显的冰川活动记录。以峡东地区为代表的鄂西地区新元古界是国际研究的经典和热点。然而，峡东地区新元古代地层序列并不完整，其毗邻的神农架西部地层序列更具代表性。位于鄂西神农架西部的高桥河剖面，其南华系超覆于中元古界神农架群基底之上，从下而上依次为莲沱组、古城组、大塘坡组和南沱组，上覆震旦系陡山沱组。通过与鄂西峡东地区、长阳地区的代表性剖面的区域地层对比，发现高桥河剖面的南华纪沉积地层序列最为连续，是鄂西地区新元古代最完整和最具代表性的地层序列之一，能够作为该区域新元古代地层划分和对比的参照标准，并为研究这一重大关键地质时期的极端古气候演变提供基础材料。

关键词: 南华系, 地层序列, 古气候变化, 高桥河剖面, 湖北西部

Abstract:

The Neoproterozoic was a critical time in the history of the earth, because it was the time of the most extreme climate change that yielded numerous glacial deposits over the world. The Neoproterozoic strata in the Three Gorges area, as a representative of the regional succession of western Hubei, has being rigorously studied. However, the Neoproterozoic sequence of the Three Gorges area was incomplete, whereas the corresponding stratigraphic succession was better developed in the neighboring West Shennongjia area. Overlying the Mesoproterozoic Shennongjia Group, the Nanhuan (Crygenian) System at the Gaoqiaohe section in the West Shennongjia area, presented in this paper, is composed of the Liantuo, Gucheng, Datangpo, and Nantuo Formations in ascending order and overlaid by the Sinian (Ediacaran) Doushantuo Formation. The regional correlation with the typical Neoproterozoic stratigraphical sections from the Three Gorges and Changyang areas indicates that the Nanhuan System at the Gaoqiaohe Section is one of the most complete and continuous lithostratigraphic sequences in the western Hubei, and it can be used as a perfect reference for the regional stratigraphical division and correlation and for the study of the extreme climate change through the critical time.

Key words: Nanhuan System, stratigraphical sequence, paleoclimate change, Gaoqiaohe section, western Hubei

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