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3. A study on the forming conditions of basalts in seamounts of the South China Sea

Author

Qiu Zhili, Teng Yunye, Li Yang, Qin Shecai, Li Zhaolin, Pang Xuebin, and Liang Dehua

Subjects
Basalt, geography, geography.geographical_feature_category, Alkali basalt, Geochemistry, Partial melting, Volcanic rock, Submarine eruption, Geochemistry and Petrology, Pumice, Xenolith, Petrology, Geology, Melt inclusions
Abstract

Volcanic rocks in seamounts of the South China Sea consist mainly of alkali basalt, tholeiitic basalt, trachyandesitic pumice, dacite, etc. Inclusions in the minerals of the volcanic rocks are mainly amorphous melt inclusions, which reflects that the volcanic rocks are characterized by submarine eruption and rapid cooling on the seafloor. Furthermore, fluid-melt inclusions have been discovered for the first time in alkali basalts and mantle-derived xenoliths. indicating a process of differentiation between magma and fluid in the course of mantle partial melting. Alkali basalts and inclusions may have been formed in this nonhomogeneous system.

Published
1994

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