全部 标题 作者
关键词 摘要

OALib Journal期刊
ISSN: 2333-9721
费用:99美元

查看量下载量

相关文章

更多...
地球学报  2006 

西藏错鄂湖沉积旋回与古环境变迁

DOI: 10.3975/cagsb.2006.04.05

Keywords: 错鄂,第四纪,沉积旋回,环境演变,西藏高原

Full-Text   Cite this paper   Add to My Lib

Abstract:

湖泊作为陆地上相对独立的自然综合体,是大气圈、岩石圈、生物圈和陆地水体相互作用的联接点,是区域环境的镜子。青藏高原中部从班长错至怒江分布密集的构造湖群,其东部位于印度季风区边缘的西藏那曲错鄂湖,发育有巨厚的湖泊沉积物,是研究高原环境演化的理想材料。本文对采自西藏那曲地区错鄂湖盆中心钻孔近200m、形成于2.8Ma以来的湖泊沉积物中的沉积旋回进行了研究,并结合沉积岩性、粒度和孢粉组合等,分析了该地区2.8Ma来的古地理环境演化过程。研究表明,2.8Ma来错鄂沉积物揭示了10个沉积旋回的变化和3大古环境演化阶段(2.8~2.5Ma,2.5~0.78Ma,0.78~0Ma)与8个次级环境波动过程。初步研究认为,错鄂地区的环境演化主要是由高原构造活动和气候波动共同作用下形成的。总体上,大的环境演替与构造运动有关,各旋回中的次级波动则与气候变化关系密切。

References

[1]  Zheng Du;Zhang Rongzu;Yang Qinye,On the natural zonation in the Qinghai-Xizang Plateau,Acta Geographica Sinica,1979(01).
[2]  李吉均;方小敏;潘保田.新生代晚期青藏高原强烈隆起及其对周边环境的影响[J].第四纪研究,2001(05)
[3]  Li Jijun;Fang Xiaomin;Pan Baotian,Late Cenozoic intensive uplift of Qinghai-Xizang Plateau and its impacts on environments in surrounding area,Quaternary Sciences,2001(05).
[4]  Cui Zhijiu;Wu Yongqiu;Liu Gengnian,On Kunlun-Yellow River tectonic movement,Scinece in China (Series D)? ,1998, 41(06).
[5]  郑度;张荣祖;杨勤业,试论青藏高原的自然地带,地理学报,1979(01).
[6]  赵希涛;朱大岗;吴中海.西藏纳木错晚更新世以来的湖泊发育[J].地球学报,2002(04)
[7]  吴敬禄;王苏民,若尔盖盆地RM孔δ18O、δ13C自生碳酸盐记录所揭示的环境演化特征,海洋地质与第四纪地质,1997(04).
[8]  施雅风;李吉均;李炳元,青藏高原晚新生代隆起与环境变化,广州:广东科技出版社,1998.
[9]  Shi Yafeng;Li Jijun;Li Bingyuan,The late Cenozic uplift and environmental changes of the Qinghai--Xizang Plateau,广州:广东科技出版社,1998.
[10]  Qi Wen;Zheng Mianping.Precipitation fluctuation since 30.0 ka BP at Chabyer Cuka,western Tibet[J].Acta Geoscientia Sinica,2005(01)
[11]  Molnar P T;England P,Late Cenozoic uplift of mountain ranges and global climate change:chicken or egg,NATURE,1990.
[12]  齐文;郑绵平.西藏扎布耶盐湖30.0 ka BP以来水位与古降水量变化[J].地球学报,2005(01)
[13]  Chen Shiyue;Jin Zhangdong;Wang Sumin.Late Cenozoic chemical weathering and environmental changes recorded in the Co Ngoin sediments,central Qinghai-Tibet Plateau[J].Acta Geologica Sinica(English Edition),2005(03)
[14]  Zhao Xitao;Zhu Dagang;Wu Zhonghai.The development of Nam Co lake in Tibet since late Pleistocene[J].Acta Geoscientia Sinica,2002(04)
[15]  Wu Yanhong;Wang Sumin;Xia Weilan,Environmental variation in central Tibetan Plateau in the last 200 years,Science in China Ser D,2001(zk).
[16]  Wu Jinglu;Wang Sumin,Environmental characteristics showed by δ18O and δ13C of authicarbonate in core RM from Zoige basin,Marine Geology & Quaternary Geology,1997(04).
[17]  Wang Sumin;Wu Xihao;Zhang Zhenke.Sedimentary records of environmental evolution in the Sanmen Lake Basin and the Yellow River running through the Sanmenxia Gorge eastward into the sea[J].Science in China Ser D,2002(07)doi:10.1360/02yd9061
[18]  Wang Sumin;Li Jianren,Lacustrine sediments-an indicator of historical climatic variations--The case of Qinghai Lake and Daihai Lake,Chinese Science Bulletin,1991(16).
[19]  Raymo M E;Ruddiman W F;Backman J,Late Pliocene variation in Northern Himisphere ice sheet and north Atlantic deep water circulation,PALEOCEANOGRAPHY,1989(04).
[20]  Lü Houyuan;Wang Sumin;Wu Naiqing,A new pollen record of the last 2.8 Ma from the Co Ngoin,central Tibetan Plateau,Science in China Ser D,2001(zk).

Full-Text

Contact Us

service@oalib.com

QQ:3279437679

WhatsApp +8615387084133