Petromorphology of the Shiren Mountain Block in the Qinling Orogenic Belt and Its Significance

• 责任者：Ren Shenglian (School of Resources and Environment Engineering ; Hefei University of Technology ; Hefei 230009 ; China) ; Song Chuanzhong
• 刊名：Geology in China
• 出版年：2010
• 卷期：37(2)
• 关键词：混合岩 ; migmatites ; 岩组学 ; petrofabrics ; 秦岭 ; Qinling Mountains
• 页码：p.347-356
• 图表：3 illus., 2 tables, 26 refs.
• 分类号：0300
• issnNo：ISSN1000-3657
• isbnNo：CN11-1167/P

Based on a mineralogical and petrological analysis of the Shiren Mountain block, the authors summed up the deformation-metamorphic characteristics of this block and the regularity of its changes under the influence of the Luonan-Luanchuan faulted belt. A migmatite zone is developed on the southern margin of the Shiren Mountain. In this zone, the rocks have been strongly folded and basite bands can be observed clearly. The metamorphic grade of rocks becomes weak from south to north. From the low amphibolite facies and amphibolite facies schist through gneiss to granite, dark minerals gradually decrease, showing a transitional relationship with granite. From south to north, with the increasing distance from the faulted belt, the rocks change from cataclastic to palimpsest in texture and from sheet to gneissic-palimpsest in structure.