安徽女山碱性玄武岩中的深源包体

DEEPSEATED XENOLITHS IN NUSHAN ALKALI BASALTS, ANHUI PROVINCE

安徽女山碱性玄武岩中具丰富的各类深源包体：二辉橄榄岩包体、辉石岩包体、复合包体和麻粒岩包体等．本文详细研究了这些包体的结构构造、矿物组合，分析了它们的矿物化学成分；通过对各种包体的平衡温压估算，结合地震测深资料，限定了女山地区壳幔边界及尖晶石／石榴石相转变带深度，并讨论了各类深源包体的原始层位．

There are abundant deepseated xenoliths in Nushan alkali basalts, Anhui province, such as lherzolites, pyroxenites, composite xenoliths and granulite xenoliths. In this paper, the textures and mineral assemblages of these xenoliths are in detail studied, and the mineral compositions of different phase are carefully analyzed by electron microprobe. By calculating the equilibrium temperatures and pressures, integrating the deep seismic sounding profile HQ13, the depths of the crustmantle boundary and the garnetspinel transitional zone are defined, at the same time, the original depths of the various deepseated xenoliths are also discussed.