|Table of Contents|

Quaternary Tectonic-sedimentary Characteristics and Environmental Evolution of Anxiang Sag in Dongting Basin and Its West Periphery(PDF)

《地球科学与环境学报》[ISSN:1672-6561/CN:61-1423/P]

Issue:
2010年第02期
Page:
120-129
Research Field:
基础地质与矿产地质
Publishing date:

Info

Title:
Quaternary Tectonic-sedimentary Characteristics and Environmental Evolution of Anxiang Sag in Dongting Basin and Its West Periphery
Author(s):
BAI Dao-yuan1; 2;  LI Chang-an2;  MA Tie-qiu1;  WANG Xian-hui1;  CHEN Du-ping1
(1.Hunan Institute of Geological Survey, Changsha 410011, Hunan, China; 2.School of Earth Sciences, China University of Geosciences, Wuhan 430074, Hubei, China)
Keywords:
Quaternary;  Anxiang Sag;  subsidence;  rise;  sediment;  denudation;  Dongting Basin
PACS:
P534
DOI:
-
Abstract:
Detailed geologic mapping and bore data was conducted to study on the Quaternary tectonic and sedimentary characteristics and environmental evolution of Anxiang Sag and its west periphery of Dongting Basin, which provided new materials for Quaternary geology of Jianghan-Dongting Basin. The sag trends north-south direction and is surrounded by normal faults. The thickness of Quaternary deposits in the sag is commonly 100-220 m with maximun thickness of 300 m, and from lower to upper, the Quaternary strata is composed of Early Pleistocene Huatian Formation and Miluo Formation, Middle Pleistocene Dongtinghu Formation, Late Pleistocene Potou Formation and Holocene lacustrine-alluvial deposits. Quaternary deposits in the sag are mainly gravel and sand, and secondly silt-bearing clay, silty clay and clay, while there exists distinct lateral lithological and lithofacies variation. In west periphery of Anxiang Sag, namely east margin of Taiyangshan uplift, there exists low hills with the earth's surface inclining east clearly, and there occurs Middle Pleistocene Baishajing Formation which is composed of sands and gravels in the lower and clay in the upper of the south, and mainly silty-clay in the north. Based on geomorphologic, sedimentary and sag-controling fault characteristics, evolution of the Quaternary tectonic and environment of the study area is defined. During early Middle Pleistocene, NNE-trending Zhoujiadian fault at the west boundary of Anxiang Sag extended and the sag subsided unevenly with deposits were formed in rivers and river like flowing lakes; in the same time the west periphery of Anxiang Sag rose and was denudate. During Middle Pleistocene faulted subsidence expanded westward, when the environment of the sag liked flowing lake, and the environment of southern and northern segment of the west periphery was river and lake, respectively. The sag and its west periphery rose as a whole during late Middle Pleistocene, when there occurred eastward tilt in west periphery. During Late Pleistocene Anxiang Sag subsided for depression and the environment was of river and lake; in the same time the west periphery was denuded. At the end of Late Pleistoncene regional sea-level dropped, which caused Anxiang Sag denudated.The sag subsided and the environments were river and lake in flood plain during Holocene.

References:

[1] 向万胜,李卫红.洞庭湖区洪涝灾害的时空分布与防灾减灾对策[J].生态学杂志,2001,20(2):48-51.
[2] 毛德华,夏 军.洞庭湖湿地生态环境问题及形成机制分析[J].冰川冻土,2002,24(4):444-451.
[3] 林承坤,许定庆,吴小根.洞庭湖的调节作用对荆江径流的影响[J].湖泊科学,2000,12(2):105-110.
[4] 邓宏兵,蔡述明,杜 耘,等.近50年来江汉湖群水域演化定量研究[J].长江流域资源与环境,2006,15(2):244-248.
[5] 龚胜生.江汉洞庭湖平原湿地的历史变迁与可持续利用[J].长江流域资源与环境,2002,11(6):569-574.
[6] 童潜明.洞庭湖近现代的演化与湿地生态系统演替[J].国土资源导刊,2004(1):38-44.
[7] 黄 群,姜加虎.近50年来洞庭湖区的内湖变化[J].湖泊科学,2005,17(3):202-206.
[8] 袁正科,李星照,田大伦,等.洞庭湖湿地景观破碎与生物多样性保护[J].中南林学院学报,2006,26(1):109-116.
[9] 张晓阳,杜 耘,蔡述明.洞庭湖演变趋势分析[J].长江流域资源与环境,1995,4(1):64-69.
[10] 苏 成,莫多闻,王 辉.洞庭湖的形成、演变与洪涝灾害[J].水土保持研究,2001,8(2):52-55.
[11] 杜 耘,殷鸿福.洞庭湖历史时期环境研究[J].地球科学——中国地质大学学报,2003,28(2):214-218.
[12] 高俊峰,张 琛,姜加虎,等.洞庭湖的冲淤变化和空间分布[J].地理学报,2001,56(3):269-277.
[13] 姜加虎,黄 群.洞庭湖近几十年来湖盆变化及冲淤特征[J].湖泊科学,2004,16(3):209-214.
[14] 来红州,莫多闻.构造沉降和泥沙淤积对洞庭湖区防洪的影响[J].地理学报,2004,59(4):574-580.
[15] 来红州,莫多闻,苏 成.洞庭湖演变趋势探讨[J].地理研究,2004,23(1):78-86.
[16] 梁 杏,张人权,皮建高,等.洞庭盆地第四纪构造活动特征[J].地质科技情报,2001,20(2):11-14.
[17] 梁 杏,张人权,皮建高,等.构造沉降对近代洞庭湖区演变的贡献——答李春初先生对《洞庭湖地质环境系统分析》的质疑[J].海洋与湖沼,2001,32(6):690-696.
[18] 皮建高,潘 晟.洞庭湖区构造沉降特征及监测方案[J].中国地质灾害与防治学报,2005,16(1):9-12.
[19] 景存义.洞庭湖的形成与演变[J].南京师院学报:自然科学版,1982(2):52-60.
[20] 王道经,黄怀勇.洞庭湖现代构造与湖盆演变[J].湖南地质,2000,19(1):30-36.
[21] 杨达源.洞庭湖的演变及其整治[J].地理研究,1986,5(3):39-46.
[22] 徐 杰,邓起东,张玉岫,等.江汉洞庭盆地构造特征和地震活动的初步分析[J].地震地质,1991,13(4):332-342.
[23] 刘锁旺,甘家思,李蓉川,等.江汉洞庭盆地的非对称扩张与潜在地震危险性[J].地壳形变与地震,1994,14(2):56-66.
[24] 薛宏交,耿爱玲,龚 平.江汉洞庭盆地水系展布特征与新构造运动[J].地壳形变与地震,1996,16(4):58-65.
[25] 皮建高,张国梁,梁 杏,等.洞庭盆地第四纪沉积环境演变的初步分析[J].地质科技情报,2001,20(2):6-10.
[26] 蔡述明,官子和,孔昭宸,等.从岩相特征和孢粉组合探讨洞庭盆地第四纪自然环境的变迁[J].海洋与湖沼,1984,15(6):527-539.
[27] 张人权,梁 杏,张国梁,等.洞庭湖区第四纪气候变化的初步探讨[J].地质科技情报,2001,20(2):1-5.
[28] 李长安,张玉芬,皮建高,等.洞庭湖古湖滨砾石层的发现及意义[J].第四纪研究,2006,26(3):491-492.
[29] 李春初.构造沉降是控制近代洞庭湖演变的关键因素吗?——评《洞庭湖地质环境系统分析》[J].海洋与湖沼,2000,31(4):460-464.
[30] 杨达源,韩辉友,吴新哲.气候变化对荆江变迁的影响[C]∥杨怀仁,唐日长.长江中游荆江变迁研究.北京:中国水利水电出版社,1999:159-177.
[31] 来红州,莫多闻,李新坡.洞庭盆地第四纪红土地层及古气候研究[J].沉积学报,2005,23(1):130-137.
[32] 毛龙江,莫多闻,杨兢红,等.环洞庭湖地区网纹红土中稀土元素的地球化学特征[J].环境化学,2008,27(2):222-225.
[33] 柏道远,马铁球,王先辉,等.1:250 000常德市幅和岳阳市幅区域地质调查报告[R].长沙:湖南省地质调查院,2009.
[34] 周国祺,刘月朗.洞庭湖及外围地区的第四纪地层与新构造运动[R].湖南常德:湖南省地矿局403地质队,1978.
[35] 陈发禅.洞庭湖第四纪地质[R].长沙:湖南省地质研究所,1981.
[36] 张国梁,皮建高,孙锡良.湖南省洞庭盆地第四纪地质研究报告[R].长沙:湖南省地矿局水文二队,1990.
[37] 向 芳,朱利东,王成善,等.宜昌地区第四纪沉积物中玄武岩砾石特征及其与长江三峡贯通的关系[J].地球科学与环境学报,2006,28(2):6-10.
[38] 杨怀仁,徐 馨.中国东部第四纪自然环境的演变[J].南京大学学报:自然科学版,1980(1):121-144.
[39] 安芷生,艾 莉.尚未完成的地质年代表——第四纪悬而未决的前程[J].地层学杂志,2005,29(2):99-103.
[40] 柏道远,李长安,陈渡平,等.洞庭盆地两护村孔重矿物特征及其对第四纪构造活动与环境演变的响应[J].地质论评,2010,56(2):246-260.
[41] 柏道远,高 峰,马铁球,等.洞庭盆地澧县凹陷第四纪沉积特征与古地理演化[J].沉积与特提斯地质,2009,29(4):10-21.
[42] 柏道远,周柯军,马铁球,等.第四纪洞庭盆地沅江凹陷东缘鹿角地区构造-沉积演化研究[J].地质力学学报,2009,15(4):409-420.
[43] 柏道远,李长安,王先辉,等.第四纪洞庭盆地澧县凹陷构造活动特征及动力学机制探讨[J].地球学报, 2010,31(1):43-55.
[44] 柏道远,李长安,王先辉,等.第四纪华容隆起构造活动、成因及动力机制[J].地质科学,2010,45(2):411-427.
[45] 林承坤.洞庭湖的演变与治理(下):Ⅱ洞庭湖的演变及其治理设想[J].地理学与国土研究,1986,2(1):40-46.
[46] 刘池洋.沉积盆地动力学与盆地成藏(矿)系统[J].地球科学与环境学报,2008,30(1):1-23.
[47] 杨怀仁,谢志仁.中国东部近20 000年来的气候波动与海面升降运动[J].海洋与湖沼,1984,15(1):1-13.
[48] 曹光杰,张学勤,熊万英.冰后期长江河口段古河谷地层层序特征[J].地球科学与环境学报,2006,28(3):1-5.

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Last Update: 2010-06-20