[1]蔡雄飞,罗中杰.湘西北张家界四都坪陡山沱组沉积特征新发现及古地理意义[J].华东地质,2018,39(01):11-17.[doi:10.16788/j.hddz.32-1865/p.2018.01.002]
　CAI Xiong-fei,LUO Zhong-jie.Sedimentary features of the Doushantuo Formation in Siduping, northwestern Hunan Province and their paleogeographical significance[J].East China Geology,2018,39(01):11-17.[doi:10.16788/j.hddz.32-1865/p.2018.01.002]
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湘西北张家界四都坪陡山沱组沉积特征新发现及古地理意义()
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《华东地质》[ISSN:2096-1871/CN:32-1865/P]

卷:
39
期数:
2018年01期
页码:
11-17
栏目:
基础地质
出版日期:
2018-03-15

文章信息/Info

Title:
Sedimentary features of the Doushantuo Formation in Siduping, northwestern Hunan Province and their paleogeographical significance
文章编号:
2096-1871(2018)01-011-07
作者:
蔡雄飞1; 罗中杰2
(1. 中国地质大学生物地质与环境地质国家重点实验室,中国地质大学(武汉)地球科学学院,武汉 430074; 2. 中国地质大学(武汉)数理学院,武汉 430074)
Author(s):
CAI Xiong-fei1;  LUO Zhong-jie2
(1. State Key Laboratory of Biogeology and Environmental Geology, School of Earth Sciences, Wuhan 430074, China; 2. School of Mathematics and Physics, China University of Geosciences, Wuhan 430074, China)
关键词:
核形石;  沉积特征;  台地夹凹地相;  陡山沱组;  湘西北四都坪
Keywords:
oncolite;  sedimentary feature;  carbonate platform intercalated with subtidal depression facies;  Doushantuo Formation;  Siduping northwestern Hunan Province
分类号:
P588.2
DOI:
10.16788/j.hddz.32-1865/p.2018.01.002
文献标志码:
A
摘要:
长期以来学者们一直认为湘西北四都坪早震旦世陡山沱组是华南地区重要的斜坡相分界标志。通过对该区构造与沉积、地层序列系统等进行研究,结合宏观与微观、点与面分析等手段,发现湘西北四都坪陡山沱组并不是深水相沉积。根据地层序列下部钙帽白云岩中的渗流构造和上部新发现的核形石,认为该区陡山沱组沉积序列、沉积特征与扬子地台北缘岩性组合基本一致,沉积环境为碳酸盐台地夹潮下凹地相沉积; 区分了碳酸盐台地台凹相与斜坡重力流,并对华南岩相古地理进行了新划分。
Abstract:
The Doushantuo Formation in Siduping, northwestern Hunan Province, has long been regarded as one important boundary marker of the slope facies zone in South China. However, in this study we found that the Doushantuo Formation in the Siduping area was not deep-water deposition, based on comprehensive analyses of tectonic and sedimentary features, stratigraphic sequence and lithology. The percolation structure in ‘cap dolomite’ of lower stratigraphic sequence and the oncolite newly discovered from the upper Formation suggests that the stratigraphic sequence and sedimentary feature in this area is basically consistent with that in the northern margin of the Yangtze Platform, being suggestive of carbonate platform intercalated with subtidal depression setting. Additionally, this study discusses the differences between the carbonate platform front facies and gravity-flow deposits in a slope setting, and redefines the lithofacies paleogeography of South China.

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相似文献/References:

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　CAI Xiong-fei,LUO Zhong-jie,YE Qin.Sedimentary characteristics of the Nantuo Formation in Siduping, Hunan and its coupling relationship with paleoclimate[J].East China Geology,2017,38(01):91.[doi:10.16788/j.hddz.32-1865/P.2017.02.002]
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备注/Memo

备注/Memo:
*收稿日期:2017-02-17 修订日期:2017-05-02 责任编辑:谭桂丽
基金项目:中国地质调查局“神农架―雪峰山地区区域地质专项调查(编号:12120114066301)”项目资助。
 第一作者简介:蔡雄飞,1952年生,男,研究员,主要从事地层学和沉积学研究。
更新日期/Last Update: 2018-03-28