摘要
煌斑岩是一类暗色矿物合量较高并具有典型的斑状结构的脉岩,产出形式复杂并广泛发育于各种不同的地质构造背景中。前人研究中提出了多种分类标准,但现今较为流行的观点则根据化学成分将其划分为超镁铁质煌斑岩(SiO2<40wt%)、钙碱性煌斑岩、碱性煌斑岩、超钾质煌斑岩(K/(K+Na)>0.75,K/Al<0.8)及过钾质煌斑岩(K/(K+Na)>0.75,K/Al>0.8)。前人研究总体表明,尽管学者们提出了多种可能的成因模式,但当前的研究多支持"富集型地幔熔融模式"和"基性岩浆陆壳混染模式"两种模式。对矿产资源而言,煌斑岩流体为金、铀、铅、锌等金属的活化迁移提供了重要条件,为石油的储存提供了空间保证,但也会对菱镁矿、煤矿等矿产的质量和开采产生负面影响。因此,本文对前人研究进行了综合评述,旨在探究煌斑岩及其成矿意义。
Lamprophyre is a kind of dikes with typical porphyritic structure,and is abundant of dark minerals.Its wide spread in various tectonic setting in the form of complex output.Previous study made a variety of classification criteria,however,the more popular view nowadays is based on the chemical composition,which can be divided into ultramafic lamprophyres(SiO2 <40wt%),calc-alkaline lamprophyre,alkaline lamprophyre rock,ultrapotassic lamprophyres(K /(K + Na)> 0.75,K /Al <0.8) and had lamprophyres(K /(K + Na)> 0.75,K /Al> 0.8).Previous studies generally show that,although scholars have put forward a variety of possible genetic model,the current study support 'enriched mantle melting model' and 'mafic crustal contamination model' mode.As for mineral resources,the activation and migration of gold,uranium,lead,zinc and other metal are provided by lamprophyre fluid.Storage space of oil is constructed by the intrusion of lamprophyre magma,as well.However,there is negative impact to the quality of coal and other minerals and mining.Therefore,this paper provides a comprehensive review of previous studies designed to explore the lamprophyre and metallogenic significance.
出处
《中山大学研究生学刊（自然科学与医学版）》
2011年第4期1-13,共13页
Journal of the Graduates Sun YAT-SEN University(Natural Sciences.Medicine)
关键词
煌斑岩
分类
成因
成矿
Lamprophyre
Classification
Petrogenesis
Mineralization
