| 吉林南部地区老岭群变质作用特征研究 |
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| 关键词:southern Jilin Province Laoling Group metamorphic characteristics |
| 基金项目:中国地质调查局地质调查工作项目“中国东北部陆缘金、有色金属多期成矿作用和勘查选区研究”(编号: 1212010012006) |
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| A Study of Metamorphic Characteristics of Laoling Group in Southern Jilin Province |
| Metamorphic minerals are widely developed in Laoling Group of southern Jilin Province. 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. By contrast, M2 is represented by local thermal metamorphism which can be divided into three metamorphic facies: lower greenschist facies, high greenschist facies and lower amphibolitic 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 hat the earth’s crust became stable in Paleo Proterozoic. |
| XING Shu-wen,LI Jun,MA Yu-bo,SUN Yong-jie,LI Xiao-wen,LI Hong-mao,ZHANG Zeng-jie.2011.A Study of Metamorphic Characteristics of Laoling Group in Southern Jilin Province[J].Acta Geoscientica Sinica,32(3):269-278. |
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