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《GEOTECTONICA ET METALLOGENIA》 1997-01
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MODELLED THE MAGMATIC PROCESSES OF JIJIE ALKALINE-ULTRABASIC INTRUSIVE COMPLEX, LUFENG, YUNNAN

HUANG Zhilong (Institute of Geochemisty, Academia Sinica, Guhang 550002)  
On the base of studies in geology and geochemistry of Jijie alkaline-ultrabasic intrusive complex, Lufeng, Yunan province. This paper, using the methods of petrological mixing calculating and others, modelled the composition of mantle-source rocks and fractional crystallization of complex.The results of modelling Calculating showed that the mantle-source rocks of the Jijie complex are obviously depleted in incompatible elements, earlier alkaline- ultrabasic rocks in tha complex (melteigites, ijolites and urtites) were the products 0f fraction 41 crystallization of mantle-derived which has not been or rarely been contaminated by the crust, later alkaline-mediosilicic rocks (agpaitic nepheline syenites ) and aegirine-albitophyres) were the products of liquid immiscibil1ty of mantle-derived magma (affinlty with alkaline-ultrabsic rocks) during the processes of evolution.
【Fund】: 中国科学院矿床地球化学开放研究实验室资助
【CateGory Index】: P588
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