富碱斑岩中超镁铁深源包体岩石的矿物学特征  

MINERALOGICAL CHARACTERISTICS OF DEEP-SOURCE ULTRAMAFIC XENOLITHS IN ALKALI-RICH PORPHYRY

作　　者：刘显凡[1] 刘家铎[1] 阳正熙[1] 张成江[1] 吴德超[1] 李佑国[1] 

机构地区：[1]成都理工大学,四川成都610059

出　　处：《矿物学报》2002年第3期289-295,共7页Acta Mineralogica Sinica

基　　金：中国地质调查局综合研究项目 (编号 :2 0 0 110 2 0 0 0 46)

摘　　要：在云南省鹤庆县六合乡富碱斑岩体中找到超镁铁深源岩石包体 ,这对于研究富碱斑岩的起源和演化及其成岩成矿作用具有重要意义。本文较系统地研究了深源包体岩石的矿物学特征 ,揭示该深源包体具有原始上地幔岩在地幔条件下受到一定程度富集地幔流体交代作用改造的特征 ,具有富集地幔低程度部分熔融属性 ,为富碱斑岩的成岩成矿演化提供了重要的矿物学依据。Ultramafic deep source xenoliths are discovered in alkali rich porphyry from the Liuhe Village, Heqing County, Yunnan Province. The discovery is helpful to constrain the origin and evolution of the alkali rich porphyry. The mineralogical characteristics of ultramafic deep source xenoliths are studied in detail in this paper. Our study shows that the xenoliths, which were primary upper mantle rocks, have been reworked to a certain extent by fluid metasomatism and have the nature of low degree partial melting of an enriched mantle source region. The study provides important mineralogical evidence for the petrogenesis and mineralization of alkali rich porphyry.

关 键 词：富碱斑岩 深源岩石包体 富集地幔 成岩成矿作用 交代作用 地球动力学 

分 类 号：P588.13[天文地球—岩石学]