Collaborative Research: Dehydration Embrittlement of Serpentine at High Pressures: Implications for Intermediate and Deep Earthquakes
合作研究:蛇纹石在高压下的脱水脆化:对中度和深层地震的影响
基本信息
- 批准号:9725575
- 负责人:
- 金额:$ 20万
- 依托单位:
- 依托单位国家:美国
- 项目类别:Continuing Grant
- 财政年份:1998
- 资助国家:美国
- 起止时间:1998-01-15 至 2001-12-31
- 项目状态:已结题
- 来源:
- 关键词:
项目摘要
9725575 Green It has been known for 30 years that hydrous phases subjected to stress during dehydration at low pressures can develop a mechanical instability leading to faulting. This phenomenon is considered to be the leading candidate to explain earthquakes at depths between 30 and 300km in Earth and a possible mechanism at all depths at which earthquakes exist. The accepted explanation of this phenomenon rests on the assumption that the volume of fluid produced in such dehydration reactions is greater than the volume of the dehydrating phase. It is now known that at very high pressure, the total volume produced by such reactions is actually smaller than that of the parent phase, raising the question as to whether this phenomenon can operate as an earthquake mechanism at depth. This project will utilize unique high pressure instrumentation to conduct deformation experiments on antigorite serpentine under pressures greater than 2.2 GPa, physical conditions such that the total volume of the product assemblage is smaller than that of the dehydrating phase, in order to test whether a mechanical instability can exist under these conditions. It is hypothesized that under these conditions, the primary failure unit will switch from formation of fluid-generated tensile microcracks to formation of fluid- generated compressive microanticracks and that the instability will be preserved. ***
9725575绿色 30年来,人们已经知道,在低压脱水过程中,含水相受到应力,会产生机械不稳定性,导致断层。 这种现象被认为是解释地球30至300公里深处地震的主要候选者,也是地震存在的所有深度的可能机制。 对这种现象的公认的解释基于这样的假设,即在这种脱水反应中产生的流体的体积大于脱水相的体积。 现在我们知道,在非常高的压力下,这种反应产生的总体积实际上小于母相的体积,这就提出了一个问题,即这种现象是否可以作为一种地震机制在深部运作。 该项目将利用独特的高压仪器对叶蛇纹石进行压力大于2.2 GPa的变形实验,物理条件是产品组合的总体积小于脱水阶段的体积,以测试在这些条件下是否存在机械不稳定性。 据推测,在这些条件下,主要的故障单元将从流体生成的拉伸微裂纹的形成切换到流体生成的压缩微反裂纹的形成,并且不稳定性将被保留。 ***
项目成果
期刊论文数量(0)
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Harry Green其他文献
Evidence of bidirectional relationship between type 2 diabetes and depression; a Mendelian randomization study
2 型糖尿病与抑郁症之间双向关系的证据;一项孟德尔随机化研究
- DOI:
10.1038/s41380-025-03083-0 - 发表时间:
2025-07-01 - 期刊:
- 影响因子:10.100
- 作者:
Renu Bala;Dale Handley;Alexandra Gillett;Harry Green;Jack Bowden;Andrew Wood;Inês Barroso;Cathryn M. Lewis;Jessica Tyrrell - 通讯作者:
Jessica Tyrrell
THE IMPACT OF DEPRESSION DIAGNOSIS ON DIABETES AND LIFETIME HYPERGLYCAEMIA
- DOI:
10.1016/j.euroneuro.2022.07.042 - 发表时间:
2022-10-01 - 期刊:
- 影响因子:
- 作者:
Jess Tyrrell;Alexandra Gillett;Francesco Casanova;Katie Young;Harry Green;Cathryn Lewis;Saskia Hagenaars - 通讯作者:
Saskia Hagenaars
Harry Green的其他文献
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{{ truncateString('Harry Green', 18)}}的其他基金
Collaborative EAGER Research: Mineral reactions during seismic slip and earthquake instability
EAGER 协作研究:地震滑移和地震不稳定期间的矿物反应
- 批准号:
1247951 - 财政年份:2012
- 资助金额:
$ 20万 - 项目类别:
Standard Grant
Establishing the Critical Parameters for Dehydration Embrittlement in Subduction Zones
建立俯冲带脱水脆化的关键参数
- 批准号:
1015264 - 财政年份:2010
- 资助金额:
$ 20万 - 项目类别:
Standard Grant
Collaborative Research: CSEDI--Grand Challenge for Experimental Study of Plastic Deformation Under Deep Earth Conditions
合作研究:CSEDI--深地条件下塑性变形实验研究的重大挑战
- 批准号:
0652626 - 财政年份:2007
- 资助金额:
$ 20万 - 项目类别:
Continuing Grant
Collaborative Research: A Study of Deep Subduction Integrating Broadband Seismology and Mineral Physics
合作研究:宽带地震学与矿物物理学相结合的深俯冲带研究
- 批准号:
0552011 - 财政年份:2006
- 资助金额:
$ 20万 - 项目类别:
Standard Grant
Technical Support for a Dual Beam Focused Ion Milling System for TEM Foil Preparation + 3D Chemical Analysis
用于 TEM 箔制备 3D 化学分析的双束聚焦离子铣削系统的技术支持
- 批准号:
0521896 - 财政年份:2005
- 资助金额:
$ 20万 - 项目类别:
Continuing Grant
Collaborative Research: COMPRES Grand Challenge for Experimental Study of Plastic Deformation under Deep Earth Conditions
合作研究:深部地球条件下塑性变形实验研究的 COMPRES 大挑战
- 批准号:
0135411 - 财政年份:2002
- 资助金额:
$ 20万 - 项目类别:
Continuing Grant
Experimental Investigation of the Rheology of Eclogite and Its Constituent Minerals at High Pressure
榴辉岩及其成分矿物高压流变性的实验研究
- 批准号:
0003631 - 财政年份:2001
- 资助金额:
$ 20万 - 项目类别:
Continuing Grant
Collaborative Research: Experimental Study of the Origin and Nature of High Pressure Faulting Relevant to Earthquakes in Subducting Lithosphere
合作研究:俯冲岩石圈与地震相关的高压断层的起源和性质的实验研究
- 批准号:
0125938 - 财政年份:2001
- 资助金额:
$ 20万 - 项目类别:
Continuing Grant
Technical Support for University of California, Riverside Technophysics Laboratory
为加州大学河滨分校技术物理实验室提供技术支持
- 批准号:
9731383 - 财政年份:1998
- 资助金额:
$ 20万 - 项目类别:
Standard Grant
An Experimental Approach to Understanding Self-Organization of Mode I Defects and Nucleation of Shear Fracture
理解 I 型缺陷自组织和剪切断裂成核的实验方法
- 批准号:
9805368 - 财政年份:1998
- 资助金额:
$ 20万 - 项目类别:
Continuing Grant
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