Granitoids of the area are grouped into five suites according to their mineralogy, texture, and exposed features.
Biotite granite occurs in the schists.
Evidence to support the metasomatic relationships is provided in the following sections. Similar kinds of metasomatic relationships occur in the biotite and two-mica granites but are not discussed in this presentation. Contacts between the Ghooshchi granite and the gabbros and diorites are poorly exposed, but in some places apophyse-like bodies of leucometasomatites extend into the gabbros. Locally, near the gabbro, mafic enclaves occur in the granite. In some places in the gabbros, light-colored felsic patches with no clear borders fade gradually into the gabbros.