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:
    0409589
  • 负责人:
  • 金额:
    $ 32.95万
  • 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 2017-01-31
  • 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.
该项目(INDEPTH IV)是以前资助的项目(INDEPTH I、II、III)的延续。 INDEPTH研究的首要目标是了解大陆-大陆碰撞中发生的基本过程。 INDEPTH I,II和III是中美联合研究,以了解青藏高原和喜马拉雅山脉的形成,它们共同构成了地球上活跃的大陆-大陆碰撞带的典型例子。 这些研究的结果深刻地影响了在这种构造环境中造山运动的流行理论。INDEPTH IV的重点是青藏高原的东北边界。 这一边界在当代关于大陆高原形成是陆内碰撞造山作用的反应的争论中起着中心作用。 最近的地质研究和有限的地球物理测量表明,a)隆升是由于亚洲地壳内部的叠瓦状“堆叠”,而B)亚洲大陆岩石圈正在拆离和“俯冲”到西藏地幔。 这种模型与主要来自高原南部和东部的观测的竞争范式形成对比,该范式将高原形成归因于地壳深部的韧性流动。 任何地表构造模型的关键是高原和邻近地区之下的地幔动力学。 北方高原下的上地幔地球物理性质被不同程度地归因于增厚岩石圈不稳定性引发的拆沉、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将在东北高原边界带的三个关键部分进行综合的、有重点的地球物理调查,以测试这些假设中的关键要素。 地球物理勘探将包括综合地震反射、折射和密集的被动地震剖面、详细的大地电磁勘探和区域宽带地震阵列。 调查将调查的具体特点包括: a)建议的莫霍面偏移的存在和性质; B)高原边界主要逆冲断层的深部几何形状; c)主要逆冲断层和走滑断层之间的关系; d)地壳标志物的结构连续性对下地壳流动的限制; e)俯冲的亚洲岩石圈的存在和性质;以及f)高原前陆之下岩石圈增厚的模式。

项目成果

期刊论文数量(0)
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会议论文数量(0)
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Eric Sandvol其他文献

Mantle deformation in the highly oblique indo-burma subduction system inferred from shear wave splitting measurements
  • DOI:
    10.1016/j.epsl.2024.118895
  • 发表时间:
    2024-10-01
  • 期刊:
  • 影响因子:
  • 作者:
    Md Mohimanul Islam;Shengji Wei;Patricia Persaud;Michael S. Steckler;Frederik Tilmann;James Ni;James Gaherty;Kyaw Moe Oo;Oo Than;Yin Myo Min Htwe;Eric Sandvol
  • 通讯作者:
    Eric Sandvol
Lg Wave Attenuation in the Isparta Angle and Anatolian Plateau (Turkey)
  • DOI:
    10.1007/s00024-012-0517-1
  • 发表时间:
    2012-07-31
  • 期刊:
  • 影响因子:
    1.900
  • 作者:
    Sakir Sahin;Xueyang Bao;Niyazi Turkelli;Eric Sandvol;Ugur Teoman;Metin Kahraman
  • 通讯作者:
    Metin Kahraman

Eric Sandvol的其他文献

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{{ truncateString('Eric Sandvol', 18)}}的其他基金

Collaborative Research: RAPID: Deployment of a Nodal Array to Capture Aftershocks of the 2023 Kahramanmaras Earthquake Sequences in Turkey
合作研究:RAPID:部署节点阵列捕获 2023 年土耳其卡赫拉曼马拉斯地震序列的余震
  • 批准号:
    2322461
  • 财政年份:
    2023
  • 资助金额:
    $ 32.95万
  • 项目类别:
    Standard Grant
Collaborative Research: The Burma Arc from Collision Kinematics to Subduction Tectonics as Observed from a Passive seismic experiment (BACKSTOP)
合作研究:被动地震实验观察到的从碰撞运动学到俯冲构造的缅甸弧(BACKSTOP)
  • 批准号:
    1928360
  • 财政年份:
    2019
  • 资助金额:
    $ 32.95万
  • 项目类别:
    Continuing Grant
Collaborative Research: Full waveform inversion for P and S seismic structure beneath Tibet
合作研究:青藏高原以下P、S地震构造全波形反演
  • 批准号:
    1838376
  • 财政年份:
    2019
  • 资助金额:
    $ 32.95万
  • 项目类别:
    Standard Grant
Collaborative Research: Subduction below extreme sedimentation - A multidisciplinary transect from the Ganges-Brahmaputra Delta to the IndoBurma Backarc
合作研究:极端沉积作用下的俯冲——从恒河-雅鲁藏布江三角洲到印缅弧后的多学科横断面
  • 批准号:
    1714875
  • 财政年份:
    2017
  • 资助金额:
    $ 32.95万
  • 项目类别:
    Continuing Grant
Collaborative Research: The Uplift and Seismic Structure of the Greater Caucasus
合作研究:大高加索地区的隆起和地震结构
  • 批准号:
    1620591
  • 财政年份:
    2016
  • 资助金额:
    $ 32.95万
  • 项目类别:
    Continuing Grant
COLLABORATIVE RESEARCH: Central Anatolian Tectonics (CD-CAT): Surface to mantle dynamics during collision to escape
合作研究:安纳托利亚中部构造(CD-CAT):碰撞逃逸过程中的地表到地幔动力学
  • 批准号:
    1109699
  • 财政年份:
    2011
  • 资助金额:
    $ 32.95万
  • 项目类别:
    Continuing Grant
CNIC/Caucasus: Regional Collaboration on Seismology
CNIC/高加索:地震学区域合作
  • 批准号:
    1133000
  • 财政年份:
    2011
  • 资助金额:
    $ 32.95万
  • 项目类别:
    Standard Grant
Collaborative Research: The Growth of the Tibetan Plateau - A Seismic Investigation of the Qilian Shan and Surrounding Tectonic Blocks
合作研究:青藏高原的生长——祁连山及周边构造块的地震调查
  • 批准号:
    0738433
  • 财政年份:
    2008
  • 资助金额:
    $ 32.95万
  • 项目类别:
    Continuing Grant
Collaborative Research: Lithospheric Dynamics in the Southernmost Andean Plateau
合作研究:安第斯高原最南端的岩石圈动力学
  • 批准号:
    0538245
  • 财政年份:
    2006
  • 资助金额:
    $ 32.95万
  • 项目类别:
    Continuing Grant
Collaborative Research: A GIS Database for Studying and Visualizing Tethyan Plate Collisions
协作研究:用于研究和可视化特提斯板块碰撞的 GIS 数据库
  • 批准号:
    0238199
  • 财政年份:
    2003
  • 资助金额:
    $ 32.95万
  • 项目类别:
    Continuing Grant

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