| 项目编号: | 1447266
|
| 项目名称: | Life Cycles of Basaltic Magma Mushes: The Dynamic Controls on Unlocking and Mixing |
| 作者: | George Bergantz
|
| 承担单位: | University of Washington
|
| 批准年: | 2014
|
| 开始日期: | 2015-04-15
|
| 结束日期: | 2018-03-31
|
| 资助金额: | USD325142
|
| 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: | novel computational fluid dynamics modeling tool
; fundamental dynamic template
; distinct magmatic episode
; dynamic control
; discrete element method computational fluid dynamics
; thermal lifetime
; magmatic product
|
| 英文摘要: | The transport of heat and mass from the Earth's deep interior to the surface by magmatism (volcanism) creates the Earth's crust and strongly conditions the atmosphere and biosphere. However the processes are almost entirely unseen, and the dynamics must be inferred from sparse observations. These observations have converged on a picture for magma systems such that they exist in a mushy, or crystal-rich and quasi-static, state for much of their thermal lifetime. This has been documented in a variety of geological environments from ocean islands and large igneous provinces, to convergent margin volcanic chains, to mid-ocean ridge systems.
Paradoxically, it has also been confirmed that these mushes can be rapidly mobilized and complexly mixed, sometimes just prior to eruption. And when the crystal mushes are preserved as large plutonic bodies, they display evidence of complex fluid and granular rheological regimes that co-existed simultaneously. Our aim is to identify the fundamental dynamic templates that produce these reoccurring processes in Nature. We will do this by employing the unification of crystal-chemical data and novel computational fluid dynamics modeling tools to reveal the templates which control of emergence of and character of distinct magmatic episodes. Our field area will be the 1868 lava flows of Mauna Loa, Hawaii, where we will identify distinct populations of magmatic products, and by utilizing the discrete element method computational fluid dynamics approach we can create synthetic populations and identify what the dynamic controls are on their occurance. |
| 资源类型: | 项目
|
| 标识符: | http://119.78.100.158/handle/2HF3EXSE/94853
|
| 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: | |
George Bergantz. Life Cycles of Basaltic Magma Mushes: The Dynamic Controls on Unlocking and Mixing. 2014-01-01.
|
|
|