山东国土资源2012，Vol.28Issue(4)：8-14,7.
鲁乐地区早前寒武纪花岗岩类演化及大陆地壳生长
Evolution and Continental Crust Growth of Early Precambrian Granitoids in Eastern Shandong Province
李洪奎 1耿科 1禚传源 1梁太涛 1陈莉1
作者信息
- 1. 山东省地质科学实验研究院,山东济南250013／山东省金属矿产成矿地质过程与资源利用重点实验室,山东济南250013
- 折叠
摘要
Abstract
Through analysis and discrimination of the granite compositions in Archean and Paleoproterozoic period, granitoids in early Precambrian period in eastern Shandong province can be divided into three stages. The first stage is Archean TTG combination with incomplete development; the second stage is Neo-archean T2G1T1 combinations with the trend of poor K2O trondhjemite evolution; the third stage is the early Paleoproterozoic G2 combination with rich K2O calc - alkaline evolutionary trend. Forming environment of different granites combinations have been studied. The Neoarchean T1T2G1 combination is island -arc environment, while the environment of the early Paleoproterozoic is continental collision. Different combination of granitoid rocks correspond to different maturity of the continental crust： T1T2 G1 combination is new initial immature continental crust, while G2 combination is a final maturity of continental crust. Evolution of the early Precambrian granitoids over time from Neoarchean to Paleoproterozoic early has recorded the geological evolution of continental crust in eastern Shandong completely.关键词
花岗岩类/岩石组合类型/构造环境/陆壳成熟度/鲁东地区Key words
Granitoids/rock assemblage types/tectonic environment/the maturity of the continental crust/eastern Shandong province分类
天文与地球科学引用本文复制引用
李洪奎,耿科,禚传源,梁太涛,陈莉..鲁乐地区早前寒武纪花岗岩类演化及大陆地壳生长[J].山东国土资源,2012,28(4):8-14,7.
