Evidences of Syn-Extensional Emplacement of Yiwulüshan Pluton and Its Geological Significance
详细信息
- 责任者：Li Gang (College of Earth Sciences ; Jilin University ; Changchun 130061 ; China) ; Liu Zhenghong
- 刊名：Journal of Jilin University
- 出版年：2010
- 卷期：40(4)
- 关键词：变质核杂岩 ; metamorphic core complexes ; 构造演化 ; structural evolution ; 辽宁 ; Liaoning Province
- 页码：p.971-978
- 图表：4 illus., 25 refs.
- 分类号：0300
- issnNo：ISSN1671-5888
- isbnNo：CN22-1343/P
摘要
The Yiwulüshan pluton is an important part of the Yiwulü metamorphic core complex. Due to its deformation and relationship with surrounding tectonic belts, the Yiwulüshan pluton is determined as the syn-extensional granite. The pluton emplaced along or parallel to ductile shear zone as a bedding-sill, which modifies previous view that the pluton caused by magma emplacement under compressed environment. The emplacement time of both the Yiwulüshan pluton and the Jianlazishan pluton is about 160 Ma, which implies intensive crustal extension occurred in the Yiwulüshan and Yanshan region in late Middle Jurassic and the tectonic pattern of the northern part of North China had been transformed in Middle Jurassic period.