地质科学
     首页 | 过刊浏览 |  本刊介绍 |  编委会 |  投稿指南 |  期刊征订 |  留言板 |  批评建议 |  联系我们 |  English
地质科学  2010, Vol. 45 Issue (04): 930-943    DOI:
论文 最新目录 | 下期目录 | 过刊浏览 | 高级检索  |   
青藏高原西北缘盆山过渡带陡坡地貌的形成时代与成因
黎敦朋1 赵越2 刘健2 万景林3 郑德文3 潘燕兵2 何哲峰2
1.福州大学紫金矿业学院 福州 350108;2.中国地质科学院地质力学研究所 北京 100081;3.中国地震局地质研究所地震动力学国家重点实验室 北京 100029
Ages and causes of steep slope relief between Tarim Basin and northwestern margin of the Tibetan Plateau:The evidence from apatite fission track dating of north margin of west Kunlun Mountains
Li Dunpeng1 Zhao Yue2 Liu Jiang2 Wan Jinglin3 Zheng Dewen3 Pan Yanbing2 He Zhefeng3
1.Zijin Mining College, Fuzhou University, Fuzhou 350108|2.Institute of Geomechanics, Chinese Academy of Geological Science, Beijing 100081|3.State Key Laboratory of Earthquake Dynamics,Institute of Geology, Chinese Earthquake Administration, Beijing 100029)
 全文: PDF (4425 KB)   HTML( )   输出: BibTeX | EndNote (RIS)      背景资料
摘要 平均海拔大于4500 m的青藏高原,是通过高原边缘的陡坡地貌与海拔低于1500 m的周缘盆地或平原相连接的,这些围绕高原的陡坡地貌是何时、如何形成的呢?本文通过对西昆仑山中段北缘主逆冲断层上盘陡坡地貌区9件磷灰石样品的裂变径迹年龄与长度分析表明:在海拔3900~4635 m的陡坡地貌中的裂变径迹样品年龄为6.2±1.4 Ma~0.9±0.3 Ma,呈现“上新下老”的反序分布特征; 而通过热历史模拟显示约5 Ma,约3~2 Ma,约2~1 Ma 和约1 Ma该地区出现多阶段的隆升与剥露。结合前人研究成果和野外地质的观察认为,现今青藏高原西北缘陡坡地貌的形成是中新世晚期以来高原边界叠瓦状断裂系经历了约8 Ma、约5 Ma、约3~2 Ma、约2~1 Ma和约1 Ma多阶段后展式逆冲运动的结果,这为青藏高原周缘陡坡地貌的形成和青藏高原的隆升时代与型式提供了关键的热年代学约束。
服务
把本文推荐给朋友
加入我的书架
加入引用管理器
E-mail Alert
RSS
作者相关文章
关键词陡坡地貌 时代与成因 裂变径迹 青藏高原西北缘     
Abstract: Tibetan Plateau,whose average elevation is more than 4 500 m,is joined the basin or plain whose elevation is less than 2 000 m through the steep slope relief of the edge of the Tibetan PlateauWhen,how does the steep slope relief formed?Nine Apatite fission track ages and length of the steep slope relief from the main thrust fault hanging wall in the middle of the northern margin of west Kunlun Mountains are analyzed in this paper,showed that fission track ages from the steep slope relief area of elevation 3 900~4 635 m are ranging from 6.2±1.4 Ma~0.9±0.3 Ma,fission track ages show as “up new under old” antiorder distribution. Thermal history modeling shows multistage uplifting and exhumation of~5 Ma,~3~2 Ma,~2~1 Ma and since~1 MaCombined with previous studies results and geological observations,think that steep slop relief what we now see in the northwestern margin of Tibetan Plateau is overstep propagation thrust results of west Kunlun thrust fault system since late Miocene,it experienced the multistage overstep propagation thrusting movement of~8 Ma,~5Ma,~3~2 Ma,~2~1 Ma and since~1 MaIt provides an important chronology constraints for age and causes of the steep slope relief forming in the margin of the Tibetan Plateau and uplifting of age and type of Tibetan Plateau.
Key wordsThe steep slope relief Age and causes Fission track Northwestern margin of the Tibetan Plateau   
收稿日期: 2010-06-08; 出版日期: 2010-10-25
基金资助:中国地质调查局基础研究项目“青藏高原新构造及晚新生代古大湖研究”(编号:1212010610108)资助。
引用本文:   
. 2010, 青藏高原西北缘盆山过渡带陡坡地貌的形成时代与成因. 地质科学, 45(04): 930-943.
. Ages and causes of steep slope relief between Tarim Basin and northwestern margin of the Tibetan Plateau:The evidence from apatite fission track dating of north margin of west Kunlun Mountains[J]. Chinese Journal of Geology, 2010, 45(04): 930-943.
 
没有本文参考文献
没有找到本文相关文献
 
版权所有 © 2009-2017 《地质科学》编辑部
地址:北京9825信箱  邮政编码:100029
电话:010-82998109  010-82998115