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The influences of carbonate melt on the electrical conductivity for pyrolite at high temperature and high pressure
Liu BingBing1,2; Huang XiaoGe1; Li Xian1,2; Chen ZuAn1
2019-02-01
Source PublicationCHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION
ISSN0001-5733
Volume62Issue:2Pages:544-557
AbstractIn order to obtain the electrical conductivity of partially molten pyrolite with carbonate and make clear the causes of formation of kimberlite magma and high conductivity zone at depth of about 80 similar to 120 km of Lac de Gras area in Central Slave Craton, we measured the electrical conductivity on pyrolite with carbonate melt at pressure of 1.0 similar to 3.0 GPa, temperature of 673 similar to 1873 K and frequency ranges of 10(-1)similar to 10(6) Hz using Solartron-1260 impedance/Gain-Phase analyzer with DS 3600 t multi-anvil apparatus. The experimental results show that electrical conductivity of partial melting samples is mainly affected by temperature and compositions. The electrical conductivities of samples containing Na(2)CO(3 )are significantly higher than those of other samples containing CaCO3 and MORB below 1023 K. The electrical conductivities of partially molten Na3CO3-bearing pyrolite hardly increase when increasing temperature at 1073 similar to 273 K. It reveals that carbonated silicate melt has constant electrical conductivity during the formation of kimberlite magma. According to previous experimental data, the high conductivity phenomenon in Lac de Gras area in Central Slave Craton at about 80 similar to 120 km may be explained by partially molten pyrolite containing carbonated silicate melt. It is speculated that less than 2 wt. % carbonate melts occur in the kimberlite magma.
KeywordElectrical conductivity Carbonate melt Pyrolite Kimberlite magma
DOI10.6038/cjg2019M0238
WOS KeywordPHASE-RELATIONS ; LITHOSPHERE BENEATH ; BULK COMPOSITION ; KAAPVAAL CRATON ; MIDOCEAN RIDGE ; WATER-CONTENT ; MANTLE ; KIMBERLITES ; BASALT ; OLIVINE
Language英语
WOS Research AreaGeochemistry & Geophysics
WOS SubjectGeochemistry & Geophysics
WOS IDWOS:000457642800009
PublisherSCIENCE PRESS
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Document Type期刊论文
Identifierhttp://ir.iggcas.ac.cn/handle/132A11/90541
Collection地球与行星物理院重点实验室
Corresponding AuthorHuang XiaoGe
Affiliation1.Chinese Acad Sci, Inst Geol & Geophys, Beijing 100029, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
Recommended Citation
GB/T 7714
Liu BingBing,Huang XiaoGe,Li Xian,et al. The influences of carbonate melt on the electrical conductivity for pyrolite at high temperature and high pressure[J]. CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION,2019,62(2):544-557.
APA Liu BingBing,Huang XiaoGe,Li Xian,&Chen ZuAn.(2019).The influences of carbonate melt on the electrical conductivity for pyrolite at high temperature and high pressure.CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION,62(2),544-557.
MLA Liu BingBing,et al."The influences of carbonate melt on the electrical conductivity for pyrolite at high temperature and high pressure".CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION 62.2(2019):544-557.
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