| 项目编号: | 1520006
|
| 项目名称: | Experimental studies on plastic deformation of the lower mantle materials |
| 作者: | Shun-ichiro Karato
|
| 承担单位: | Yale University
|
| 批准年: | 2014
|
| 开始日期: | 2015-12-01
|
| 结束日期: | 2018-11-30
|
| 资助金额: | USD404982
|
| 资助来源: | US-NSF
|
| 项目类别: | Continuing grant
|
| 国家: | US
|
| 语种: | 英语
|
| 特色学科分类: | Geosciences - Earth Sciences
|
| 英文关键词: | mantle
; material
; plastic deformation
; mantle condition
; large strain quantitative deformation experiment
; deformation experiment
; experimental study
; upper mantle
; plastic flow behavior
; deformation apparatus
|
| 英文摘要: | In this project, the PI team will study the plastic flow behavior of materials in the lower mantle of the Earth that occupies a large fraction of Earth between the upper mantle and the core. Plastic deformation in this region is an important mechanism of cooling of Earth and it also controls the way in which materials are stirred or mixed. The experimental studies on plastic deformation under the conditions of the lower mantle have been difficult due to the difficulties in generating and measuring stress and strain under these conditions. The team has made various modifications to the deformation apparatus that was developed in their lab to conduct these deformation experiments. The results will provide the first data set to understand the whole Earth thermal and chemical history.
Rheological properties of the lower mantle will be investigated using a rotational Drickamer apparatus developed in in the PI's laboratory. This apparatus, after numerous modifications, now allows his team to conduct large strain quantitative deformation experiments (to strain ~100-300%) under shallow lower mantle conditions (P to 28 GPa, T to 2200 K) providing the quantitative results on rheological behavior under these conditions. Not only the flow laws of each mineral, but also the microstructural evolution will be studied to provide the mechanisms of deformation and the nature of lattice-preferred orientation that can be used to interpret seismic anisotropy. |
| 资源类型: | 项目
|
| 标识符: | http://119.78.100.158/handle/2HF3EXSE/93045
|
| Appears in Collections: | 影响、适应和脆弱性
气候减缓与适应
|
|
There are no files associated with this item.
|
| Recommended Citation: | |
Shun-ichiro Karato. Experimental studies on plastic deformation of the lower mantle materials. 2014-01-01.
|
|
|