Publication: Advances in Polar Science (APS). Antarctic Research, Vol. 2, No. 1, 30~38, June 1991
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Author: Zheng Xiangshen and Liu Xiaohan
CNARC member: Polar Research Institute of China (PRIC)
Abstract: Cenozoic volcanic rocks in the Fildes Peninsula are composed of High-Al basalt, basaltic andesite, andesite, and dacite belonging to a calc-alkaline volcanic series with low-K and high-Al characteristics. Using a new indicator, the Sr, / Ca-Ba / Ca, systematics proposed by Onuma (1980, 1981) and Sr, Ba, Ca concentrations in volcanic lavas and subvolcanic rocks, the authors find that the high-Al basaltic volcanic rocks either in volcanic strata or in subvolcanic intrusives were formed from a primary magma, in different stages through the fractional crystallization of clinopyro-xene(Cpx) and plagioclase (pl) in the process of magmatic evolution, resulting in the formation of basaltic-andesitic, andesitic and dacitic rocks.
Key words: Fildes Peninsula, Cenozoic volcanic rocks, Sr / Ca-Ba / Ca Systematics
