摘要
本文回顾了国内外金伯利岩及其它地幔岩中发现的K、Ba、Ca、REE的Ti-Cr－Fe－Mg氧化物矿物的研究现状，包括沂蒙矿系列、蒙山矿系列及柱红石系列。在此基础上概括性地总结了笔者近一、二年对山东蒙阴金伯利岩中蒙山矿矿物所进行的微区矿物学方向研究取得的最新进展，包括：①揭示了K、Ba、Ca、REE等半径较大的元素在蒙山矿中的不均匀分布特点；②首次在金伯利岩中发现了蒙山矿系列矿物的Ca端元——Ca蒙山矿及K－Ba－Ca三个端元蒙山矿在同一矿物颗粒中的共存现象；③进行了高分辨透射电镜工作，拍摄了晶格条纹象，从而完善了蒙山矿的晶体结构资料；④确定了蒙山矿后期熔融交代形成的多种矿物相。这些研究成果，证实了地幔交代作用的存在和复杂性，应引起矿物岩石学界的充分重视。
This paper briefly reviews the present status of research on some K-,Ba-, Ca-, and REE-besring Cr-Ti-Fe oxides discovered in recent years in kimberlites and other mantle rocks in theworld, including three mineral series: YIHA, LIHA, and priderire series. Based upon this someimportant progresses are generalized in micro-regional research on mathiasites, including: (1 )het-erogeneous distribution of the large ions K, Ba, Ca, REE, etc, in mathiasites ; (2) the existencethat was firstly confirmed of the Ca-end member minerals of mathiasites and the co-existence ofK-, Ba-, Ca-end member minerals in only one grain in kimberlite; (3)acquirement of the electrondiffraction and lattice streak patterns of mathiasites by TEM, thus perfecting the crystal structuredata of mathiasites ; and (4)confirmation of the formation of several mineral phases in late meltingand metasomatism of mathiasites.The above results provide evidence for the existence and compliation of mantle metasomatism,which should be highly concerned with by mineralogists and petrographers.
出处
《矿物学报》
CSCD
北大核心
1994年第4期343-347,T001,共5页
Acta Mineralogica Sinica
基金
国家自然科学基金
关键词
金伯利岩
蒙山矿
新矿物相
氧化物矿物
铬
钛
kimberlite
mathiasite
large ion
new mineral phase
mantle metasomatism
