• 责任者：Li Hongying (Institute of Mineral Resources ; Chinese Academy of Geological Sciences ; Beijing 100037 ; China) ; Liu Junfeng
• 刊名：Acta Petrologica et Mineralogica
• 出版年：2009
• 卷期：28(3)
• 关键词：超镁铁质岩 ; ultramafics ; 接触变质作用 ; contact metamorphism ; 角闪岩 ; amphibolites ; 秦岭 ; Qinling Mountains
• 页码：p.225-234
• 图表：6 illus., 4 tables, 29 refs.
• 分类号：0802
• issnNo：ISSN1000-6524
• isbnNo：CN11-1966/P

The Songshugou ultramafic pluton of the Shangdan fault is the largest ultramafic body in the East Qinling Orogen and assumes the emplacement contract with the Qinling complex. The pluton is composed mainly of fine-grained as well as medium-and coarse-grained dunite and plagioclase-pyroxene peridotite.This paper presents new data on the inclusions and trace element concentrations of zircons from garnet amphibolites that occur in a metamorphic contact zone. Studies indicate that the ultramafic intrusion and adjacent amphibolites experienced different tectonic events, and the ultramafic pluton was emplaced in amphibolites formed before. Geochemical data suggest that amphibolites have characteristics of MORB and IAT and likely belong to the Qinling Group.