The geological features of Suwushijie rockbody (group) in Altyn Tagh middle-zone

The Suwushijie rockbody (group) distributed on the meso-epimetamorphic uplift area of the AZhong massif is a large scale multi-body,and contact relationship between different types of rocks is clear.Their invaded order from early to late is gabbro-diabase → diorite → porphy roid granodiorite → fine granular adamellite → porphyr oid medium-coarse-grained adamellite.As a whole,the characteristics of components and tectonic evaluation have been showed in this order mentioned above.The lithog eochemical data proves that this rock group is similar to SCOLG and shows characteristics of source-mixed granite from mantle source rock and crust source rock.Isotope age indicat es that the invaded age of this group is in late period of Early Paleo zoic and relates to subduction of the subducting plate.