摘要
新田—棉田岩体分布于延边地区中北部,由新田石英闪长岩体和棉田花岗闪长岩体组成。本文系统讨论了岩体的地质地球化学特征。结果表明:新田岩体和棉田岩体均属Ⅰ型花岗岩,形成于早海西期,为同期先后两幕岩浆活动产物,二者之间具有明显的同源演化关系,构成了一个构造岩浆旋回。
The Xintian—Miantian masses are located in the central north of Yanbian, consisting of the Xintian quartz diorite mass and Miantian granodiorite mass. The geological and geochemical characteristics of the masses are discussed systematically in this paper. A conclusion is drawn from the discussion mentioned above. They both belong to the Ⅰ-type granite and were formed in early Hercynian period, i.e,two activity episodes in the same period, indicating the cognate evolution between them and the formation of a tectonic—mag matic cycle.
出处
《吉林地质》
1991年第3期61-69,共9页
Jilin Geology
关键词
花岗岩
地球化学
岩体
延边市
Xintian—Miantian masses Geological and geochemical characteristics Cognate evolution Early Hercynian
