辽宁宽甸刘家堡子超单元岩浆演化  

MLMAGMATIC EVOLUTION OF LIUJIAPUZI ULTRA UNIT IN KUANDIAN COUNTY,LIAONING PROVINCE

作　　者：雷广新 

机构地区：[1]辽宁地质勘查院,辽宁大连116100

出　　处：《辽宁地质》1999年第3期188-193,共6页

摘　　要：刘家堡子超单元同位素锆石Ｕ－ Ｐｂ 一致线年龄值为２ ０４６．４８±７ ．０１Ｍａ，侵位时代为古元古代。按照侵入岩岩石谱系单位的划分原则，由早至晚划分为红旗村单元石英闪长岩、头道阳岔单元花岗闪长岩及阳隈子单元二长花岗岩，归并为刘家堡子超单元。成因类型为Ⅰ型花岗岩类，成岩物质来源于下地壳，岩浆演化由中性至酸性，演化明显，构成了完整的演化序列。Liujiapuzi ultra unit emplaced in Paleo Proterozoic,which the U Pb concordant isotopic age is determined to be 2 046.48±7.01Ma.According to the subdivision criterion of rock lineage units, the intrusive rocks of Liujiapuzi ultra unit from early to late can be subdivided into quartz diorite of Hongqicun unit,granodiorite of Toudaoyangcha unit,and adamellite of Yangweizi unit.Its genesis is of I type granitoid and the diagenetic material came from the lower crust. The magma obviously evolved from intermediate to acid ,forming a complete evolution succession .

关 键 词：超单元 古元古代 花岗岩类 岩浆演化 铀-铅年龄 

分 类 号：P588.121[天文地球—岩石学] P588.11[天文地球—地质学]