Mantle hydration and the role of water in the generation of large igneous provinces.
Mantle hydration and the role of water in the generation of large igneous provinces.
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地幔水合作用和水在大型火成岩省生成中的作用
DOI:
10.1038/s41467-017-01940-3
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发表时间:
2017-11-28
影响因子:
16.6
通讯作者:
Yu HR
中科院分区:
文献类型:
--
作者:
Liu J;Xia QK;Kuritani T;Hanski E;Yu HR
The genesis of large igneous provinces (LIP) is controlled by multiple factors including anomalous mantle temperatures, the presence of fusible fertile components and volatiles in the mantle source, and the extent of decompression. The lack of a comprehensive examination of all these factors in one specific LIP makes the mantle plume model debatable. Here, we report estimates of the water content in picrites from the Emeishan LIP in southwestern China. Although these picrites display an island arc-like H2O content (up to 3.4 by weight percent), the trace element characteristics do not support a subduction zone setting but point to a hydrous reservoir in the deep mantle. Combining with previous studies, we propose that hydrous and hot plumes occasionally appeared in the Phanerozoic era to produce continental LIPs (e.g., Tarim, Siberian Trap, Karoo). The wide sampling of hydrous reservoirs in the deep mantle by mantle plumes thus indicates that the Earth’s interior is largely hydrated. The genesis of large igneous provinces (LIPs) remains controversial. Here, the authors examine the water contents of picrites from the Emeishan LIP and find that despite high water contents, the elevated temperature and trace elements suggest a mantle plume from a hydrous deep reservoir rather than subduction zone related.
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影响因子:
3.5
作者:
Herzberg, C.;Asimow, P. D.
通讯作者:
Asimow, P. D.
影响因子:
5.3
作者:
He, B;Xu, YG;Wang, Y
通讯作者:
Wang, Y
影响因子:
18.3
作者:
Kendrick, M. A.;Hemond, C.;Perfit, M. R.
通讯作者:
Perfit, M. R.
影响因子:
3.9
作者:
Liu, Jia;Xia, Qun-Ke;Feng, Min
通讯作者:
Feng, Min
影响因子:
5.3
作者:
CAMPBELL, IH;GRIFFITHS, RW
通讯作者:
GRIFFITHS, RW