DOI: 10.1038/ngeo1851
论文题名: Noble gas transport into the mantle facilitated by high solubility in amphibole
作者: Jackson C.R.M. ; Parman S.W. ; Kelley S.P. ; Cooper R.F.
刊名: Nature Geoscience
ISSN: 17520894
出版年: 2013
卷: 6, 期: 7 起始页码: 562
结束页码: 565
语种: 英语
Scopus关键词: amphibole
; gas transport
; high pressure system
; magmatism
; mantle
; noble gas
; oceanic crust
; slab
; solubility
; subduction zone
英文摘要: The chemical evolution of both the Earth's atmosphere and mantle can be traced using noble gases. Their abundance in mantle and atmosphere reflects a balance between the flux of noble gases from the Earth's interior through magmatism, and the recycling of noble gases from the atmosphere back into the mantle at subduction zones. The flux of noble gases back into the mantle has long been thought to be negligible. However, analyses of samples from the mantle now suggest that this recycling flux is more significant, but the responsible mechanisms are unclear. Here we present high-pressure experimental measurements that demonstrate high solubility of noble gases in amphibole, an important hydrous mineral in altered oceanic crust. Noble gas solubility correlates with the concentration of unoccupied A-sites, which consist of a pair of opposing tetrahedra rings. We conclude that A-sites are energetically favourable locations for noble gas dissolution in amphibole that could allow recycling of noble gases into the mantle by subduction of altered oceanic crust. As many hydrous minerals in subducting slabs, such as serpentine and chlorite, have lattice structures similar to the A-site in amphibole, we suggest that these minerals may provide even more significant recycling pathways. © 2013 Macmillan Publishers Limited. All rights reserved. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/106747
Appears in Collections: 气候减缓与适应 科学计划与规划
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作者单位: Geological Sciences, Brown University, Providence, RI 02912, United States; Department of Environment, Earth and Ecosystems, Open University, Milton Keynes, MK7 6AA, United Kingdom
Recommended Citation:
Jackson C.R.M.,Parman S.W.,Kelley S.P.,et al. Noble gas transport into the mantle facilitated by high solubility in amphibole[J]. Nature Geoscience,2013-01-01,6(7)