Some　Geochemical　Characters　of　Kimberlites　in　Eastern　North　China　Platform　and　Heterogeneity　of　Their　Sources  

作　　者：Zheng Jianping Lu Fengxiang Wang Baixuan Wang Yin Chen Zhongmei(Faculty of Earth Sciences, China University of Geosciences, Wuhan 430074) 

出　　处：《Journal of Earth Science》1996年第2期173-177,共5页地球科学学刊（英文版）

摘　　要：Some geochemical characters of the kimberlites from different rock regions in North China platform are compared in this paper at first. The characters of the source regions are constrained then based on primary magmas compositions of typical regions chosen. The differences in metasomatic fluid activity in the lithosphere are discussed moreover. The diamondiferious kimberlitic sources, such as Fuxian and Mongying, were located at the fluid metasomatic mantle lithosphere or the boundary between the lithosphere and the asthenosphere(200-230 km), and enrich in LREE,Ti and isotope Sr but deplete in isotope Nd. Tieling is located nearby Paleozoic mobile belt, strong activity in fluids and shallower depth of magma source (～150 km), highest in w(LREE) and w (P), lower in w(Ti). But the shallowest depth of magma source (<130 km ) and weak activity in fluids are in Hebi and Shexian sources.Some geochemical characters of the kimberlites from different rock regions in North China platform are compared in this paper at first. The characters of the source regions are constrained then based on primary magmas compositions of typical regions chosen. The differences in metasomatic fluid activity in the lithosphere are discussed moreover. The diamondiferious kimberlitic sources, such as Fuxian and Mongying, were located at the fluid metasomatic mantle lithosphere or the boundary between the lithosphere and the asthenosphere(200-230 km), and enrich in LREE,Ti and isotope Sr but deplete in isotope Nd. Tieling is located nearby Paleozoic mobile belt, strong activity in fluids and shallower depth of magma source (～150 km), highest in w(LREE) and w (P), lower in w(Ti). But the shallowest depth of magma source (<130 km ) and weak activity in fluids are in Hebi and Shexian sources.

关 键 词：KIMBERLITE source geochemistry depth fluid activity North China platform 

分 类 号：P545[天文地球—构造地质学]