Collaborative Research: Deep Structure of the Northeast Tibetan Collision Zone- INDEPTH IV

合作研究:青藏高原东北碰撞带的深层结构-INDEPTH IV

基本信息

  • 批准号:
    0409939
  • 负责人:
  • 金额:
    $ 52.57万
  • 依托单位:
  • 依托单位国家:
    美国
  • 项目类别:
    Continuing Grant
  • 财政年份:
    2007
  • 资助国家:
    美国
  • 起止时间:
    2007-02-15 至 2013-01-31
  • 项目状态:
    已结题

项目摘要

This project (INDEPTH IV) is a continuation of previously funded projects (INDEPTH I, II, III). The overarching goal of the INDEPTH studies is to understand the basic processes that take place in a continent-continent collision. INDEPTH I, II, and III were joint Sino-U.S. studies to understand the formation of the Tibetan Plateau and Himalayan mountains, which together comprise Earth's type example of an active continent-continent collision zone. Results from these studies have profoundly influenced prevalent theories of mountain building in such tectonic settings. The focus of INDEPTH IV is the northeastern boundary of the Tibetan Plateau. This boundary plays a central role in a contemporary debate concerning continental plateau formation as an intracontinental response to collisional orogeny. Recent geological studies and limited geophysical measurements in this region have been cited to argue that a) uplift is due to internal imbricate "stacking" of Asian crust while b) Asian continental lithosphere is being detached and "subducted" into the Tibetan mantle. Such models contrast with a competing paradigm, derived primarily from observations in the southern and eastern portions of the Plateau, that attribute plateau formation to ductile flow in the deep crust. Critical to any model of surface tectonics is the mantle dynamics beneath the plateau and adjacent regions. Upper mantle geophysical properties beneath the northern plateau have been variously attributed to delamination triggered by instability of a thickened lithosphere, mantle lid detachment and/or asthenospheric counterflow associated with subduction of Indian continental lithosphere. INDEPTH IV will test key elements in these hypotheses with an integrated, focused program of geophysical surveys across three key segments of the NE Plateau boundary zone. Geophysical surveys will consist of integrated seismic reflection, refraction and densely spaced passive seismic profiles, a detailed magnetotelluric survey, and a regional broadband seismic array. Specific features to be investigated by the surveys include: a) the existence and nature of proposed Moho offsets; b) the deep geometry of major thrust faults at the plateau boundary; c) the relationship between major thrusts and strike slip faults; d) constraints on lower crustal flow from structural continuity of crustal markers; e) the existence and nature of subducting Asian lithosphere; and f) the mode of lithospheric thickening beneath the plateau foreland.
这个项目(第四次调查)是以前资助的项目(第一、二、三次调查)的继续。纵深研究的首要目标是了解大陆与大陆碰撞时发生的基本过程。深度一、二、三是中美联合项目。这些研究结果深刻地影响了这种构造背景下流行的造山理论。这一边界在当代关于大陆高原形成是对碰撞造山运动的陆内反应的争论中起着中心作用。这种模式与一种竞争性的模式形成对比,这种模式主要来自高原南部和东部的观测,将高原的形成归因于地壳深处的韧性流动。任何地表构造模型的关键是高原及其邻近地区的地幔动力学。北部高原下的上地幔地球物理性质不同地归因于由增厚岩石圈不稳定引发的剥离、地幔盖剥离和/或与印度大陆岩石圈俯冲相关的软流圈逆流。INDEPTH IV将通过在东北高原边界带的三个关键部分进行综合的、集中的地球物理调查计划来测试这些假设中的关键要素。地球物理调查将包括综合地震反射、折射和密集间隔的被动地震剖面、详细的大地电磁调查和区域宽带地震阵列。调查要调查的具体特征包括:a)拟议的莫霍偏移的存在和性质;B)高原边界主要逆冲断层的深部几何构造;C)逆冲断层与走滑断层的关系;D)构造连续性对下地壳流动的约束;e)俯冲亚洲岩石圈的存在和性质;f)高原前陆下岩石圈增厚模式。

项目成果

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Simon Klemperer其他文献

Deep-seated lithospheric geometry in revealing collapse of the Tibetan Plateau
揭示青藏高原塌陷的深层岩石圈几何学
  • DOI:
    10.1016/j.earscirev.2018.07.013
  • 发表时间:
    2018-10
  • 期刊:
  • 影响因子:
    12.1
  • 作者:
    Xiaoyu Guo;Rui Gao;Junmeng Zhao;Xiao Xu;Zhanwu Lu;Simon Klemperer;Hongbing Liu
  • 通讯作者:
    Hongbing Liu

Simon Klemperer的其他文献

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{{ truncateString('Simon Klemperer', 18)}}的其他基金

Collaborative Research: Helium-isotope Systematics Along Seismic Profiles in Tibet to Study Geometry of Indian and Tibetan Lithosphere
合作研究:沿西藏地震剖面的氦同位素系统学研究印度和西藏岩石圈的几何形状
  • 批准号:
    1628282
  • 财政年份:
    2016
  • 资助金额:
    $ 52.57万
  • 项目类别:
    Continuing Grant
RAPID: Collaborative Research: Nepal Array Measuring Aftershock Seismicity Trailing Earthquake
RAPID:合作研究:尼泊尔阵列测量地震后的余震地震活动
  • 批准号:
    1545923
  • 财政年份:
    2015
  • 资助金额:
    $ 52.57万
  • 项目类别:
    Standard Grant
Flexarray 3D Passive Seismic Imaging of Core-complex Extension in the Ruby Range, Nevada
内华达州红宝石山脉核心复合体延伸区的 Flexarray 3D 被动地震成像
  • 批准号:
    0844386
  • 财政年份:
    2009
  • 资助金额:
    $ 52.57万
  • 项目类别:
    Standard Grant
Passive seismic study of a magma-dominated rift: the Salton Trough
岩浆主导的裂谷的被动地震研究:索尔顿海槽
  • 批准号:
    0911743
  • 财政年份:
    2009
  • 资助金额:
    $ 52.57万
  • 项目类别:
    Standard Grant
Test of 3C recording with 1C instruments in association with High Lava Plains field program, for crustal shear-wave velocity, anisotropy, and lithology.
与高熔岩平原现场计划相关的 1C 仪器的 3C 记录测试,用于地壳剪切波速度、各向异性和岩性。
  • 批准号:
    0821785
  • 财政年份:
    2008
  • 资助金额:
    $ 52.57万
  • 项目类别:
    Standard Grant
USArray FlexArray augmentation of a seismic study of the extension paradox at the northwest margin of the Basin-&-Range Province
USArray FlexArray 增强了盆地西北缘延伸悖论的地震研究
  • 批准号:
    0346245
  • 财政年份:
    2004
  • 资助金额:
    $ 52.57万
  • 项目类别:
    Standard Grant
Ultra-low frequency electromagnetic monitoring of earthquakes within the Earthscope Plate Boundary Observatory
Earthscope板块边界观测站内地震的超低频电磁监测
  • 批准号:
    0346236
  • 财政年份:
    2004
  • 资助金额:
    $ 52.57万
  • 项目类别:
    Continuing Grant
Collaborative Research: Field demonstration of utility of NEES Vibrator to meet EarthScope science objectives for earthquake-hazard and crustal-structure studies
合作研究:现场演示 NEES 振动器的实用性,以满足 EarthScope 地震灾害和地壳结构研究的科学目标
  • 批准号:
    0444696
  • 财政年份:
    2004
  • 资助金额:
    $ 52.57万
  • 项目类别:
    Standard Grant
Collaborative Research: US-EAGLE (Ethiopia-Afar Grand Lithospheric Experiment):Modification of Lithospheric Structure During Continental Break-up
合作研究:US-EAGLE(埃塞俄比亚-阿法尔大岩石圈实验):大陆破裂期间岩石圈结构的改变
  • 批准号:
    0208475
  • 财政年份:
    2002
  • 资助金额:
    $ 52.57万
  • 项目类别:
    Continuing Grant
US-Japan Collaborative Research: Multi-Scale Seismic Imaging of the Mariana Subduction Factory
美日合作研究:马里亚纳俯冲工厂的多尺度地震成像
  • 批准号:
    0001956
  • 财政年份:
    2001
  • 资助金额:
    $ 52.57万
  • 项目类别:
    Standard Grant

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