Study of Metamorphic Characteristics of Laoling Group in Southern Jilin Province
详细信息
- 责任者：Xing Shuwen (Key Laboratory of Metallogeny and Mineral Assessment ; MLR ; Institute of Mineral Resources ; Chinese Academy of Geological Sciences ; Beijing 100037 ; China) ; Li Jun
- 刊名：Acta Geoscientica Sinica
- 出版年：2011
- 卷期：32(3)
- 关键词：变质矿物 ; metamorphic minerals ; 变质作用 ; metamorphism ; 吉林 ; Jilin Province
- 页码：p.269-278
- 图表：9 illus., 1 table, 28 refs.
- 分类号：0802
- 出版序号：861
- issnNo：ISSN1006-3021
- isbnNo：CN11-3474/P
摘要
Based on a detailed analysis of the metamorphic minerals in rock samples, the authors hold that the main minerals in lower sub-group of Laoling Group can be divided into two generations: M1 and M2, which represent two metamorphic stages. Researches on metamorphic assemblage, distribution characteristics and division of metamorphic facies show that M1 is characterized by low-to-moderate temperature regional dynamic heat flow metamorphism which can be divided into two metamorphic facies: lower greenschist facies and high greenschist facies. Comprehensive studies show that metamorphism of the sub-group of Laoling Group in southern Jilin Province is characterized by reduction of influencing area and decrease of intensity from early to late. This tendency suggests that the earth’s crust became stable in Proterozoic.
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