| 项目编号: | 1401270
|
| 项目名称: | CSEDI Collaborative Research: Deep Mantle Cycling of Oceanic Crust |
| 作者: | Edward Garnero
|
| 承担单位: | Arizona State University
|
| 批准年: | 2013
|
| 开始日期: | 2014-08-15
|
| 结束日期: | 2017-07-31
|
| 资助金额: | USD550121
|
| 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
; oceanic crust
; former crust
; crust
; earth
; deep mantle
; deep mantle chemistry
; deep interior
; deep compositional reservoir
; postdoctoral researcher
; viable deep mantle mineral
; hot mantle plume
; 2-year research project
|
| 英文摘要: | This 2-year research project focuses on investigating the fate of oceanic crust and tectonic plates that dive into Earth's interior at subduction zones. Earth's convecting mantle transports the former crust to the deep interior, and eventually back up to the surface. This work specifically seeks to understand the chemistry, structure, and dynamics of oceanic crust in Earth's lower mantle. Plate tectonics and thus subduction-currents carrying crust into the deep mantle are an ongoing process; thus better understanding the distribution of, the dynamics of, and chemistry of deeply transported crust uniquely provides a window into the chemical and dynamical evolution of Earth's mantle as a whole. Past work clearly establishes how the mantle might convect, viable deep mantle minerals, and that there are seismically detected heterogeneities. This work builds upon these ideas by seeking to connect them via studying a known input into the system of unique chemistry: the oceanic crust. This work has broad impact, since the mantle's evolution ultimately plays a role in the chemical and thermal evolution of the oceans and atmosphere.
A multidisciplinary approach is adopted for this project, since (a) high pressure mineral physics in the diamond anvil cell can investigate the properties of former crust and sediments (e.g., melt) at conditions 1000's of km deep in Earth's mantle; (b) how former crust interacts with convective flow and structures, including deep compositional reservoirs, hot mantle plumes, and deep mantle chemistries can be explored with state-of-the-art numerical convection experiments; and (c) former oceanic crust may relate to structures observed with modern array seismology methods that have unknown mineralogy, including thin ultra low seismic wave speed zones at the bottom of the mantle, as well as massive continent-sized zones of low shear wave velocities beneath the Pacific and Atlantic Oceans. The multidisciplinary proposed work will include a strong co-mentoring approach among the team of PIs for the graduate student and postdoctoral researchers. |
| 资源类型: | 项目
|
| 标识符: | http://119.78.100.158/handle/2HF3EXSE/95997
|
| 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: | |
Edward Garnero. CSEDI Collaborative Research: Deep Mantle Cycling of Oceanic Crust. 2013-01-01.
|
|
|