摘要
北武夷东部山前铜钹山出露一套花岗质火山—侵入杂岩 ,具高硅、富碱、过铝、铁镁含量低及富Rb、Th、Ce、LREE ,贫Nb、Hf、Yb、Y ,δEu变化较大等特点。区内花岗岩类与酸性中酸性火山岩在时间、空间和成岩物质来源具一致性 ,主要形成于晚燕山造山后期构造回返的类裂谷拉张环境中。该套杂岩是由于壳幔作用促使钙碱性岩浆活动的残留源区再次部分熔融 ,并有幔源物质混入其中 。
The Tongboshan volcanic-intrusive complex outcropped in easthern Wuyishan is characterized by high silicon,rich alkaline,pre aluminous,lower ferromagnesian,rich Rb?Th?Ce?LREE,poor Nb?Hf?Yb?Y and great variety of δEu.The granitic rocks are consistent with felsic volcanics in time,space and origin forming in rift extension environment. The complex is formed from crystallization-differentiation of high potassium calc-alkaline and mugeritic granitic magma resulted from partial fusion of calc-alkaline magma in relict area mixed with mantle materials.
出处
《资源调查与环境》
2002年第2期140-148,共9页
Resources Survey & Environment
基金
国家地质调查项目 :景德镇市幅
南昌市幅
上饶市幅 1:2 5万区域地质调查项目 (2 0 0 0 130 0 0 0 2 0 91)资助
