摘要
根据包体中Ｍｇ（Ｍｇ／（Ｍｇ十Ｆｅ））和矿物学特征，将福建龙海牛头山区新生代玄武岩中的包体分为三个类型：Ⅰ型，Ｍｇ＞８６，以含翠绿色铬透辉石，富含橄榄石为特点；Ⅱ型，Ｍｇ＝８６～６０，以含富铝辉石为特征；Ⅲ型，Ｍｇ＜６０，以含培－钙长石和铁尖晶石为特征。微量元素特征表明，Ⅰ型包体属于地幔包体，Ⅲ型包体是岩浆结晶分异的产物。
On the basis of the Mg(Mg/(Mg+ZFe)values and minealogy of inclusions in Cenozoic Nitoushan basalts of the Longhai county in the southeastern FujianProvince, the inclusions can be devided into three types in this paper. Type i,Mg'>86,its feature is of some fresh green chrome-diopside and rich in olivine. Type 1, Mg'￣8660, it is rich in aluminium-rich augite.Type Mg<60,its feature is of bytownitediploite or iron-spinel. REE quantitative data and intermediate metallic elements suggestthat type I is from the mantle reservoir,typeⅡis the products of fractional crystallizationof magma.
出处
《南京建筑工程学院学报》
1995年第3期32-41,共10页
Journal of Nanjing Architectural and Civil Engineering Institute(Natural Science)
关键词
岩石学
玄武岩
地幔
包体
福建
petrology
basalt
earth mantle
inclusion
