摘要
吉林省南部晚太古宙绿岩带位于龙岗古陆核南部边缘,它包括板石沟、四方山和旺文川绿岩带,其岩石主要为变质镁铁质火山岩和变质长英质火山岩,反映出具双峰式火山岩的特征。另外,本区绿岩带岩石的岩石化学和地球化学特征与龙岗古陆核北部边缘的夹皮沟绿岩带具有明显的差异,表明两者成岩环境不同。本区绿岩带斜长角闪岩属板内玄武岩,其成岩环境与大陆裂谷环境相似。
The late Archaean. greenstone belt, in southern Jilin province lies in the southern margin of the Longgang old continental nucleus, including greenstone belt of the Banshigou, Sifangshan and Wangwenchuan, they are mainly metamorphic mafic volcanic rocks and metatorphic felsic rocks; showing the characteristics of the Jiapigou greenstone belt rocks of petrochemistry and geochemistry have obvious different in this area to that the northern margin of the Longgang continental nucleus, showing different diagenetic invironment. The greenstone belt amphibolites in the area belong to the intraplate basalts, the diagenetic invironment is similar to continental rift.
出处
《吉林地质》
1993年第3期24-31,共8页
Jilin Geology
关键词
绿岩带
玄武岩
成岩环境
地球化学
Banshigou-Wangwenchuan greenstone belt Intraplate basalts Diagenetic invironment Continental rift
