摘要
通过区调填图在固阳地区新发现了一套新太古代TTG质的侵入岩 .这套岩石主要由闪长岩、石英闪长岩、英云闪长岩组成 ,虽然遭受了一定程度的变质作用 ,但仍保存了较完整的侵入岩外貌 ,与太古宙灰色片麻岩在外貌上存在明显区别 .岩石为钙碱性系列 ,总体属TTG岩系的一部分 .根据同位素资料确定岩石的年龄为 2 40 0～ 2 5 0 0Ma ,属新太古代末期 .
A suite of Neo_Archaean tonalitic_trondjemites_granodioritic intrusive rocks composed mainly of diorites, quartz diorites, and tonalites are discovered in Guyang district, Inner Mongolia through the regional mapping. Although these intrusive rocks have been metamorphosed to some extent, their relatively perfect appearances quite different from those of the Archaean gray gneisses can still be observed. These rocks within the calc_alkali series are a part of the TTG rock series. The isotopic dating indicates that the age of the rocks at 2?400-2?500?Ma, i.e. at the end of Neo_Archaean.
出处
《地球科学（中国地质大学学报）》
EI
CAS
CSCD
北大核心
2000年第3期221-226,共6页
Earth Science-Journal of China University of Geosciences
基金
地质矿产部"内蒙古固阳地区三幅 1:5万联测"项目
关键词
新太古代
侵入岩
同位素
岩石特征
Neo_Archaean
intrusive rocks
isotope
Guyang, Inner Mongolia.
