NDLI: Experiments on dehydration-melting of the khondalite series in the northern segment of Helan Mountain, III—the evolution of oxygen, water, and hydrogen fugacities

Content Provider	Springer Nature Link
Author	Liu, Jianzhong Lu, Liangzhao Xie, Hongsen Liu, Xishan
Copyright Year	2001
Abstract	Based on the experiments on dehydration-melting of solid samples of Al-rich gneiss (H029) and biotite granulitite (H013), the fugacities of O$_{2}$, H$_{2}$O and H$_{2}$ have been calculated. It is recognized that the fugacities of O$_{2}$, H$_{2}$O and H$_{2}$ vary regularly, but the fugacity of H$_{2}$O shows a tendency of abrupt increasing at about 700°C and 800°C. According to the above fact, the melting mechanism of biotite can be well documented. Under relatively low temperatures (< 750°C), part of the water can be liberated and induce plagioclase to melt, which may mark the beginning of migmatization. At high temperatures (> 800°C), biotite can be dissociated and a larger amount of water can be released, which would result in a bigger degree of melting, hence leading to the formation of granitic magma.
Starting Page	351
Ending Page	356
Page Count	6
File Format	PDF
ISSN	10009426
Journal	Chinese Journal of Geochemistry
Volume Number	20
Issue Number	4
e-ISSN	19930364
Language	English
Publisher	Science in China Press
Publisher Date	2001-01-01
Publisher Place	Beijing
Access Restriction	Subscribed
Subject Keyword	khondalite series dehydration melting fugacity Geochemistry
Content Type	Text
Resource Type	Article
Subject	Geochemistry and Petrology

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Experiments on dehydration-melting of the khondalite series in the northern segment of Helan Mountain, III—the evolution of oxygen, water, and hydrogen fugacities