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A method to estimate the pre-eruptive water content of basalts: Application to the Wudalianchi-Erkeshan-Keluo volcanic field, Northeastern China
Di, Yankun1,4; Tian, Wei1; Chen, Mimi1; Li, Zefeng2,5; Chu, Zhuyin3; Liang, Ju1
2020-02-01
Source PublicationAMERICAN MINERALOGIST
ISSN0003-004X
Volume105Issue:2Pages:149-161
AbstractWater plays an important role in the generation and evolution of volcanic systems. However, the direct measurement of the pre-eruption water content of subaerial volcanic rocks is difficult, because of the degassing during magma ascent. In this study, we developed a method to calculate the pre-eruption water content of the basalts from the Cenozoic Wudalianchi-Erkeshan-Keluo (WEK) potassic volcanic field, Northeastern China, and investigated their mantle source. A water-insensitive clinopyroxene-melt thermobarometer and a water-sensitive silica activity thermobarometer were applied to these basalts. Two pressure-temperature (P-T) paths of the ascending magma were calculated using these two independent thermobarometers, with a similar P-T slope but clear offset. By adjusting the water content used in the calculation, the difference between the two P-T paths was minimized, and the water content of the WEK melts was estimated to be 4.5 +/- 1.2 wt% at a pressure range of 10.1-13.5 kbar, corresponding to depths of 37-47 km. Degassing modeling shows that during the magma ascent from below the Moho to near the surface, CO2 was predominantly degassed, while the melt H2O content kept stable. Significant H2O degassing occurred until the magma ascended to 5-2 kbar. The silica activity P-T estimates of the most primary WEK samples suggest that the magmas were generated by the melting of convective mantle, which was probably facilitated by a wet upwelling plume from the mantle transition zone. The high water content found in the WEK basalts is similar to the recent reports on Phanerozoic intraplate large igneous provinces (LIPs) and supports the presence of hydrated deep mantle reservoirs as one possible source of the LIPs.
KeywordWater content potassic basalt degas thermobarometer Northeastern China Wudalianchi-Erkeshan-Keluo Volatile Elements in Differentiated Planetary Interiors
DOI10.2138/am-2020-7137
Funding OrganizationNational Natural Science Foundation of China ; National Natural Science Foundation of China ; National Key R&D Program of China ; National Key R&D Program of China ; National Student's Platform for Innovation and Entrepreneurship Training Program of China ; National Student's Platform for Innovation and Entrepreneurship Training Program of China ; Tan Siu Lin Overseas Exchange Endowment for Undergraduates ; Tan Siu Lin Overseas Exchange Endowment for Undergraduates ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Key R&D Program of China ; National Key R&D Program of China ; National Student's Platform for Innovation and Entrepreneurship Training Program of China ; National Student's Platform for Innovation and Entrepreneurship Training Program of China ; Tan Siu Lin Overseas Exchange Endowment for Undergraduates ; Tan Siu Lin Overseas Exchange Endowment for Undergraduates ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Key R&D Program of China ; National Key R&D Program of China ; National Student's Platform for Innovation and Entrepreneurship Training Program of China ; National Student's Platform for Innovation and Entrepreneurship Training Program of China ; Tan Siu Lin Overseas Exchange Endowment for Undergraduates ; Tan Siu Lin Overseas Exchange Endowment for Undergraduates ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Key R&D Program of China ; National Key R&D Program of China ; National Student's Platform for Innovation and Entrepreneurship Training Program of China ; National Student's Platform for Innovation and Entrepreneurship Training Program of China ; Tan Siu Lin Overseas Exchange Endowment for Undergraduates ; Tan Siu Lin Overseas Exchange Endowment for Undergraduates
WOS KeywordBENEATH NE CHINA ; LITHOSPHERIC MANTLE BENEATH ; LARGE IGNEOUS PROVINCE ; CENOZOIC BASALTS ; POTASSIC BASALTS ; MAGMATIC WATER ; GEOCHEMICAL EVIDENCE ; SILICATE-GLASSES ; TRACE-ELEMENTS ; STAGNANT SLAB
Language英语
Funding ProjectNational Natural Science Foundation of China[41630205] ; National Key R&D Program of China[2017YFC0601302] ; National Student's Platform for Innovation and Entrepreneurship Training Program of China[201511001041] ; Tan Siu Lin Overseas Exchange Endowment for Undergraduates
Funding OrganizationNational Natural Science Foundation of China ; National Natural Science Foundation of China ; National Key R&D Program of China ; National Key R&D Program of China ; National Student's Platform for Innovation and Entrepreneurship Training Program of China ; National Student's Platform for Innovation and Entrepreneurship Training Program of China ; Tan Siu Lin Overseas Exchange Endowment for Undergraduates ; Tan Siu Lin Overseas Exchange Endowment for Undergraduates ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Key R&D Program of China ; National Key R&D Program of China ; National Student's Platform for Innovation and Entrepreneurship Training Program of China ; National Student's Platform for Innovation and Entrepreneurship Training Program of China ; Tan Siu Lin Overseas Exchange Endowment for Undergraduates ; Tan Siu Lin Overseas Exchange Endowment for Undergraduates ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Key R&D Program of China ; National Key R&D Program of China ; National Student's Platform for Innovation and Entrepreneurship Training Program of China ; National Student's Platform for Innovation and Entrepreneurship Training Program of China ; Tan Siu Lin Overseas Exchange Endowment for Undergraduates ; Tan Siu Lin Overseas Exchange Endowment for Undergraduates ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Key R&D Program of China ; National Key R&D Program of China ; National Student's Platform for Innovation and Entrepreneurship Training Program of China ; National Student's Platform for Innovation and Entrepreneurship Training Program of China ; Tan Siu Lin Overseas Exchange Endowment for Undergraduates ; Tan Siu Lin Overseas Exchange Endowment for Undergraduates
WOS Research AreaGeochemistry & Geophysics ; Mineralogy
WOS SubjectGeochemistry & Geophysics ; Mineralogy
WOS IDWOS:000509460100001
PublisherMINERALOGICAL SOC AMER
Citation statistics
Document Type期刊论文
Identifierhttp://ir.iggcas.ac.cn/handle/132A11/95887
Collection岩石圈演化国家重点实验室
Corresponding AuthorTian, Wei
Affiliation1.Peking Univ, Sch Earth & Space Sci, Beijing 100871, Peoples R China
2.Peking Univ, Sch Phys, Beijing 100871, Peoples R China
3.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, Beijing 100029, Peoples R China
4.Australian Natl Univ, Res Sch Earth Sci, Acton, ACT 2601, Australia
5.Australian Natl Univ, Res Sch Astron & Astrophys, Weston, ACT 2611, Australia
Recommended Citation
GB/T 7714
Di, Yankun,Tian, Wei,Chen, Mimi,et al. A method to estimate the pre-eruptive water content of basalts: Application to the Wudalianchi-Erkeshan-Keluo volcanic field, Northeastern China[J]. AMERICAN MINERALOGIST,2020,105(2):149-161.
APA Di, Yankun,Tian, Wei,Chen, Mimi,Li, Zefeng,Chu, Zhuyin,&Liang, Ju.(2020).A method to estimate the pre-eruptive water content of basalts: Application to the Wudalianchi-Erkeshan-Keluo volcanic field, Northeastern China.AMERICAN MINERALOGIST,105(2),149-161.
MLA Di, Yankun,et al."A method to estimate the pre-eruptive water content of basalts: Application to the Wudalianchi-Erkeshan-Keluo volcanic field, Northeastern China".AMERICAN MINERALOGIST 105.2(2020):149-161.
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