气候变化领域集成服务门户(CCPortal): Electrical Conductivity of CO2 and H2O-Bearing Nephelinitic Melt

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DOI	10.1029/2020JB019569
	Electrical Conductivity of CO2 and H2O-Bearing Nephelinitic Melt
	Guo X.; Wang Q.; Li B.; Zha X.-P.; Gong B.; Ni H.
发表日期	2021
ISSN	21699313
卷号	126 期号:4
英文摘要	Despite previous measurements on electrical conductivity of carbonate or carbonatite melts, the effect of several wt% CO2 on electrical conductivity of silicate melts has never been experimentally examined. This study investigated the CO2 effect on electrical conductivity of nephelinitic melt at 500°C–1,150°C and 0.5–1.0 GPa with 0.1–6.0 wt% CO2 and 0.2–1.6 wt% H2O in piston cylinder apparatus using sweeping frequency impedance analyses. Experimental results show that volatile-bearing nephelinitic melt is highly conductive. In contrast with the strong enhancing effect of H2O on electrical conductivity of silicate melts, CO2 shows weak and even slightly negative influence on electrical conductivity of nephelinitic melt within the investigated CO2 range. Literature data of electrical conductivity of hydrous carbonated basaltic melts suggested strong positive CO2 effect at CO2 >10 wt%, but their model prediction at <6 wt% CO2 is consistent with our results. A weak CO2 effect implies that (Formula presented.) does not contribute to electrical conduction in any significant way at CO2 <6 wt%. Our results suggest that magnetotelluric survey is much less sensitive to CO2 content than to H2O content of crustal magma reservoirs. © 2021. American Geophysical Union. All Rights Reserved.
英文关键词	carbon dioxide; electrical conductivity; nephelinitic melt
语种	英语
来源期刊	Journal of Geophysical Research: Solid Earth
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/187228
作者单位	School of Earth and Space Sciences, CAS Key Laboratory of Crust-Mantle Materials and Environments, University of Science and Technology of China, Hefei, China; CAS Center for Excellence in Comparative Planetology, USTC, Hefei, China
推荐引用方式 GB/T 7714	Guo X.,Wang Q.,Li B.,et al. Electrical Conductivity of CO2 and H2O-Bearing Nephelinitic Melt[J],2021,126(4).
APA	Guo X.,Wang Q.,Li B.,Zha X.-P.,Gong B.,&Ni H..(2021).Electrical Conductivity of CO2 and H2O-Bearing Nephelinitic Melt.Journal of Geophysical Research: Solid Earth,126(4).
MLA	Guo X.,et al."Electrical Conductivity of CO2 and H2O-Bearing Nephelinitic Melt".Journal of Geophysical Research: Solid Earth 126.4(2021).