• 责任者：Li Jiahao (School of Resources and Environmental Engineering ; Hefei University of Technology ; Hefei 230009 ; China) ; Song Chuanzhong
• 刊名：Geological Review
• 出版年：2011
• 卷期：57(5)
• 关键词：变质岩 ; metamorphic rocks ; 构造岩 ; tectonite ; 构造变形 ; tectonic deformation ; 秦岭 ; Qinling Mountains
• 页码：p.641-649
• 图表：9 illus., 4 tables, 32 refs.
• 分类号：0802
• 出版序号：1671
• issnNo：ISSN0371-5736
• isbnNo：CN11-1952/P

///The southern margin of the Shangnan-Danfeng (Shang-Dan) tectonic belt is composed of a series of tectono-stratigraphic sheets, consisting of metamorphic sandstone, mica schist, garnet-bearing mica-quartz schist, phyllonite and mylonite. In this paper, the garnet-bearing mica-quartz schist is taken as the research object. The results show that the garnet is almandine and has compositional zonation. The garnet-biotite geothermometer and geobarometry of Si in phengite are used to estimate the peak metamorphic temperature. The calculated metamorphic temperature is 560~588 ℃ and the upper limit of pressure is 0.59~0.65 GPa. This metamorphic event mainly corresponds to epidote-amphibolite facies to low amphibolite facies and that is similar to the environment of continental orogenic belt. Deformation intensity analysis shows a strong deformation of rocks in this area, and the strain ellipsoid is flat-ellipsoidal (flattening).