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  2016, Vol. 51 Issue (1): 5-14    DOI: 10.3969/j.issn.0563-5020.2016.01.002
论文 最新目录 | 下期目录 | 过刊浏览 | 高级检索  |   
青藏高原东北缘岩石圈-软流圈边界成像
张洪双, 李秋生, 高锐, 叶卓, 龚辰
中国地质科学院地质研究所, 国土资源部深部探测与地球动力学重点开放实验室 北京 100037
The lithospheric structure beneath the northeastern Tibetan Plateau inferred from S-wave receiver functions
Zhang Hongshuang, Li Qiusheng, Gao Rui, Ye Zhuo, Gong Chen
Key Laboratory of Earth Probe and Geodynamics, Ministry of Land and Resources of the People's Republic of China, Institute of Geology, Chinese Academy of Geological Sciences, Beijing 100037
 全文: PDF (3742 KB)   HTML( )   输出: BibTeX | EndNote (RIS)      背景资料
摘要 青藏高原东北缘是研究高原隆升和演化的理想场所,其岩石圈结构记录了高原向外扩展的岩石圈变形行为和演化过程,本研究利用一条跨青藏高原东北缘的宽频带观测剖面(红原-景泰剖面)和部分甘肃、青海区域台网的远震体波波形资料,通过S波接收函数方法获得了青藏高原东北缘的岩石圈-软流圈边界(LAB)图像。结果表明:1)松潘-甘孜地体东北部和西秦岭造山带下方的岩石圈较薄,略向北加厚,其LAB深度为110~130 km,昆仑断层下方无明显岩石圈错断,推测松潘-甘孜地块与西秦岭造山带的岩石圈可能具有亲缘性; 2)祁连地块下方的岩石圈厚度为135~150 km,其中祁连造山带东缘的LAB震相不聚焦,反映复杂的造山带型岩石圈属性; 3)阿拉善地块下方岩石圈略向南加厚, LAB深度为130~150 km,呈向祁连造山带下方汇聚的趋势,但尚未通过海原断裂带; 4)鄂尔多斯地块下方的岩石圈较厚, LAB深度为160~170 km,反映其稳定的克拉通型岩石圈属性。
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
关键词青藏高原东北缘   S波接收函数   岩石圈-软流圈边界   LAB     
Abstract: The northeastern(NE) Tibetan Plateau is an ideal place for the study of plateau uplift and evolution. Its lithosphere records the process of the lithospheric deformation transforming from the Tibet to the stable Alashan and Ordos blocks. Here, using the dense passive-source seismic profile across the NE Tibet and the regional seismic networks of Gansu and Qinghai Provinces, we isolate S receiver functions from the teleseismic S and SKS wave data and resolve the spatial distribution of the lithosphere-asthenosphere boundary(LAB) across the NE Tibetan Plateau. Our observations demonstrate that:1) Beneath the northeastern Songpan-Ganzi terrane and the West Qinling orogenic belt, the LAB lies at 110~130 km which dips at a shallow angle to the northeast, and none lithospheric offset is observed beneath the East Kunlun fault. The smooth LAB may indicate an intact lithosphere between these two blocks; 2) The lithospheric thickness is 135~150 km beneath the Qilian block, and the LAB phases are dispersive beneath the Qilian orogenic belt, in the western part of the Qilian block. The dispersive LAB phases may imply a complex tectonic lithosphere; 3) The LAB of the Alashan block lies at 130~150 km, which seems to converging beneath the Qilian block, but dose not across the Haiyuan fault, yet; 4) The lithospheric thickness of the Ordos block is 160~170 km, which imply a thick and rigid craton lithosphere.
Key wordsNortheastern Tibetan Plateau   S-wave receiver function   Lithosphere-asthenosphere boundary   
收稿日期: 2015-03-19;
基金资助:

国家自然科学基金项目(编号:41104034,41174081,41274066,41430213,41574092,41574094)、国家专项"深部探测技术实验与集成"(编号:SinoProbe-02)和地质调查项目(编号:12120115027101)资助。

作者简介: 张洪双,女,1981年3月生,博士,副研究员,地球物理学和地球动力学专业。E-mail:zhs1981@126.com
引用本文:   
. 2016, 青藏高原东北缘岩石圈-软流圈边界成像. 地质科学, 51(1): 5-14.
. The lithospheric structure beneath the northeastern Tibetan Plateau inferred from S-wave receiver functions[J]. Chinese Journal of Geology, 2016, 51(1): 5-14.
 
没有本文参考文献
[1] 王师迪 师亚芹 董云鹏. 青藏高原东北缘固关—虢镇断裂中段第四纪以来活动特征[J]. 地质科学, 2018, 53(3): 781-798.
[2] 史小辉 杨 钊 董云鹏 王师迪 周 波. 西秦岭嘉陵江上游瞬时地貌发育特征[J]. 地质科学, 2018, 53(3): 819-834.
[3] 陈天仕 程 斌 董云鹏 王兆国. 南北构造带北段S波分裂研究及其动力学意义[J]. 地质科学, 2018, 53(3): 860-875.
[4] 郭进京 吉夏 赵海涛 陆宏宇 王凯旋 韩文峰. 西秦岭北缘漳县韩家沟砾岩对青藏高原东北缘地壳隆升的约束[J]. 地质科学, 2017, 52(4): 1011-1025.
 
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
京ICP备05029136号-10