globalchange  > 气候变化与战略
CSCD记录号: CSCD:5712004
论文题名:
藏南及邻区典型晚新生代盆地磁性地层研究现状与时代对比分析
其他题名: COMPARATIVE ANALYSIS ON THE MAGNETIC STRATA DEVELOPED IN THE LATE CENOZOIC BASINS IN THE SOUTHERN TIBET PLATEAU AND ITS ADJACENT AREAS
作者: 何林1; 吴中海2; 哈广浩2; 张海军1
刊名: 地质力学学报
ISSN: 1006-6616
出版年: 2016
卷: 22, 期:1, 页码:2033-2044
语种: 中文
中文关键词: 青藏高原 ; 晚新生代 ; 磁性地层 ; 近南北向断陷盆地 ; 高原隆升
英文关键词: Tibet plateau ; Late Cenozoic ; magnetic stratigraphy ; nearly south-north rifting basins ; uplift of the plateau
WOS学科分类: GEOLOGY
WOS研究方向: Geology
中文摘要: 在系统梳理扎达盆地、尼泊尔Thakkhola半地堑盆地、吉隆沃马盆地、乌郁盆地磁性地层研究成果的基础上,对古地磁年代所代表的地质事件进行了对比和分析,认为藏南及邻区各近南北向裂谷盆地自形成以来均发育2次明显的沉积变动事件,第一次为距今10.6 ~ 8.1 Ma期间各盆地分别开始接受沉积,第二次为距今3.5 ~ 2.0 Ma各湖盆的连续消亡; 总结高原的气候变化可以发现,高原在距今约8 Ma及3 Ma左右也有明显的2次气候变化,即沉积事件与气候变化事件在时间上具有近同时性。扎达盆地、吉隆沃马盆地、达涕盆地三趾马化石的时代都处于距今7.0 ~ 6.5 Ma之间,也具有近同时性。结合高原的整体演化,认为其可能在距今10.6 ~ 8.1 Ma、3.5 ~ 2.0 Ma发生了2期比较强烈的隆升运动。同时,分析指出了青藏高原南部及邻区晚新生代盆地磁性地层研究过程中存在的问题及解决方法,并对今后青藏高原南部及邻区地区晚新生代磁性地层研究提出了建议。
英文摘要: The sedimentary strata among the late Cenozoic extensional rift basins with direction south-north or northeast records some important information about the uplift process of the Tibet plateau in southern Tibet and neighboring areas. Magneto stratigraphy is an important method to define the formation and evolution of the late Cenozoic basins. In this paper,we combed and analyzed the magnetic strata research results about the Zhada basin,Thakkhola basin in Nepal, Gyirong-Oma basin and Wuyu basin systematically. In southern Tibet and neighboring areas,we found two distinct sedimentary change events in the south-north basins since they emerged by the comparison and analysis on the geological events represented by the paleomagnetic chronological. The first is that all the basins began to receive deposits between 10.6 ~ 8.1Ma; and the second is that the basins began to die between 3.5 ~ 2Ma continuously. Moreover,the plateau have two obvious climate changes events at about 8Ma and 3Ma respectively by the summary on the climate change. Therefor the sedimentary and climate changes are near simultaneous. Besides,the ages of the Hipparion fossil in the Zhada basin,Gyirong-Oma basin and Datee basin are between 6.5 ~ 7Ma,also with nearly simultaneous. We thought that perhaps there were two relative strong uplift stages on the plateau in 10.6 ~ 8.1Ma and 3.5 ~ 2Ma by contacting with the overall evolution of the Tibet plateau. At the same time,we raised some questions exiting in the research about the magnetic strata of the late Cenozoic basins in the southern Tibet plateau neighboring areas and gave solutions. And,we offered some proposals for future research about magnetic stratigraphy in this region.
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/150720
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作者单位: 1.(北京)中国地质大学地球科学与资源学院, 北京 100083, 中国
2.中国地质科学院地质力学研究所, 北京 100081, 中国

Recommended Citation:
何林,吴中海,哈广浩,等. 藏南及邻区典型晚新生代盆地磁性地层研究现状与时代对比分析[J]. 地质力学学报,2016-01-01,22(1):2033-2044
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