IOCAS-IR  > 海洋地质与环境重点实验室
High water content in primitive continental flood basalts
Xia, Qun-Ke1; Bi, Yao2; Li, Pei1; Tian, Wei3; Wei, Xun4; Chen, Han-Lin1
AbstractAs the main constituent of large igneous provinces, the generation of continental flood basalts (CFB) that are characterized by huge eruption volume (>10(5) km(3)) within short time span (<1-3 Ma) is in principle caused by an abnormally high temperature, extended decompression, a certain amount of mafic source rocks (e.g., pyroxenite), or an elevated H2O content in the mantle source. These four factors are not mutually exclusive. There are growing evidences for high temperature, decompression and mafic source rocks, albeit with hot debate. However, there is currently no convincing evidence of high water content in the source of CFB. We retrieved the initial H2O content of the primitive CFB in the early Permian Tarim large igneous province (NW China), using the H2O content of ten early-formed clinopyroxene (cpx) crystals that recorded the composition of the primitive Tarim basaltic melts and the partition coefficient of H2O between cpx and basaltic melt. The arc-like H2O content (4.82 +/- 1.00 wt.%) provides the first clear evidence that H2O plays an important role in the generation of CFB.
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Document Type期刊论文
Affiliation1.Zhejiang Univ, Sch Earth Sci, Hangzhou 310003, Zhejiang, Peoples R China
2.Univ Sci & Technol China, Sch Earth & Space Sci, Hefei 230026, Peoples R China
3.Peking Univ, Sch Earth & Space Sci, Beijing 100871, Peoples R China
4.Chinese Acad Sci, Key Lab Marine Geol & Environm, Inst Oceanol, Qingdao, Peoples R China
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GB/T 7714
Xia, Qun-Ke,Bi, Yao,Li, Pei,et al. High water content in primitive continental flood basalts[J]. SCIENTIFIC REPORTS,2016,6.
APA Xia, Qun-Ke,Bi, Yao,Li, Pei,Tian, Wei,Wei, Xun,&Chen, Han-Lin.(2016).High water content in primitive continental flood basalts.SCIENTIFIC REPORTS,6.
MLA Xia, Qun-Ke,et al."High water content in primitive continental flood basalts".SCIENTIFIC REPORTS 6(2016).
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