| 项目编号: | 1347085
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| 项目名称: | The Deep Sulfur Cycle in Subduction Zones and Arc Magmas |
| 作者: | Cin-Ty Lee
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| 承担单位: | William Marsh Rice University
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| 批准年: | 2013
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| 开始日期: | 2014-04-01
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| 结束日期: | 2017-03-31
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| 资助金额: | USD279713
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| 资助来源: | US-NSF
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| 项目类别: | Standard Grant
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| 国家: | US
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| 语种: | 英语
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| 特色学科分类: | Geosciences - Earth Sciences
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| 英文关键词: | sulfur
; volcanic arc
; sulfur content
; sulfur geochemistry
; average sulfur concentration
; much sulfur
; sulfur flux
; deep earth
; crust
; subduction zone
; sulfur cycling
; sulfur cycle
; deep sulfur cycle
; isotopic architecture
; subduction wedge
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| 英文摘要: | Sulfur is a ubiquitous element on Earth. Because it exhibits a wide range of valence states, sulfur can behave as an electron acceptor or donor and thus is a potent driver of redox reactions, dictating the mobility of metals and serving as an energy source for life. Understanding sulfur geochemistry in the deep Earth is thus critical to understanding the origin of ore deposits, the evolution of oxygen in the atmosphere and marine environment, the pathways of biogeochemical processes, and climate change. As a small step towards better understanding the deep sulfur cycle, these researchers will characterize the sulfur content and isotopic composition of a volcanic arc, from the mantle through the crust.
How sulfur cycles between the endogenic (crust, mantle, and core) and exogenic (ocean, atmosphere, and biosphere) Earth systems is of particular interest regarding the role of sulfur in various redox-driven processes on Earth. The locus of sulfur flux between these Earth systems occurs in volcanic arcs, where mantle melting in the subduction wedge induces shallow melting and ultimate storage or eruption of magma within or through the crust. The goal of this project is three-fold: 1) quantify how much sulfur and what type (sulfate vs. sulfide) is transported via the slab to depths of magma generation in subduction zones, 2) construct the ?stratigraphy? of sulfur from the mantle through the crust in volcanic arcs, and 3) define the average sulfur concentration of juvenile and mature continental crust. From this information the sulfur content and isotopic architecture of an arc from the mantle through the crust can be constructed, with implications for sulfur cycling between the endogenic and exogenic Earth systems.
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| 资源类型: | 项目
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| 标识符: | http://119.78.100.158/handle/2HF3EXSE/97214
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| Appears in Collections: | 影响、适应和脆弱性
气候减缓与适应
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| Recommended Citation: | |
Cin-Ty Lee. The Deep Sulfur Cycle in Subduction Zones and Arc Magmas. 2013-01-01.
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