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Copper partitioning between granitic silicate melt and coexisting aqueous fluid at 850 °C and 100 MPa
Shuilong Wang;  Hui Li;  Linbo Shang;  Xianwu Bi;  Xinsong Wang;  Wenlin Fan
2016
Source PublicationActa Geochimica
Volume35Issue:4Pages:381-390
Abstract

Experiments on the partitioning of Cu between different granitic silicate melts and the respective coexisting aqueous fluids have been performed under conditions of 850 °C, 100 MPa and oxygen fugacity (fO2) buffered at approaching Ni–NiO (NNO). Partition coefficients of Cu (DCu = cfluid/cmelt) were varied with different alumina/alkali mole ratios [Al2O3/(Na2O + K2O), abbreviated as Al/Alk], Na/K mole ratios, and SiO2 mole contents. The DCu increased from 1.28 ± 0.01 to 22.18 ± 0.22 with the increase of Al/Alk mole ratios (ranging from 0.64 to 1.20) and Na/K mole ratios (ranging from 0.58 to 2.56). The experimental results also showed that DCu was positively correlated with the HCl concentration of the starting fluid. The DCu was independent of the SiO2 mole content in the range of SiO2 content considered. No DCu value was less than 1 in our experiments at 850 °C and 100 MPa, indicating that Cu preferred to enter the fluid phase rather than the coexisting melt phase under most conditions in the melt-fluid system, and thus a significant amount of Cu could be transported in the fluid phase in the magmatic-hydrothermal environment. The results indicated that Cu favored partitioning into the aqueous fluid rather than the melt phase if there was a high Na/K ratio, Na-rich, peraluminous granitic melt coexisting with the high Cl fluid.

KeywordCu Experimental Study Partition Coefficient Granitic Silicate Melt Aqueous Fluid
Indexed ByEI
Language英语
Document Type期刊论文
Identifierhttp://ir.gyig.ac.cn/handle/42920512-1/7704
Collection矿床地球化学国家重点实验室
Affiliation1.中国科学院地球化学研究所
2.Geophysical Exploration Institute of Heilongjiang Province, Harbin 150036, China
3.University of Chinese Academy of Sciences, Beijing 100039, China
First Author Affilication中国科学院地球化学研究所
Corresponding Author Affilication中国科学院地球化学研究所
Recommended Citation
GB/T 7714
Shuilong Wang;Hui Li;Linbo Shang;Xianwu Bi;Xinsong Wang;Wenlin Fan. Copper partitioning between granitic silicate melt and coexisting aqueous fluid at 850 °C and 100 MPa[J]. Acta Geochimica,2016,35(4):381-390.
APA Shuilong Wang;Hui Li;Linbo Shang;Xianwu Bi;Xinsong Wang;Wenlin Fan.(2016).Copper partitioning between granitic silicate melt and coexisting aqueous fluid at 850 °C and 100 MPa.Acta Geochimica,35(4),381-390.
MLA Shuilong Wang;Hui Li;Linbo Shang;Xianwu Bi;Xinsong Wang;Wenlin Fan."Copper partitioning between granitic silicate melt and coexisting aqueous fluid at 850 °C and 100 MPa".Acta Geochimica 35.4(2016):381-390.
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