Emplacement Model of Palaeoproterozoic Early Granite in Jiao Liao Ji Area and Its Relation to the Uplift Bedding Delamination Structural Series
胶辽吉地区古元古代早期花岗岩的侵位模式及其与隆滑构造的关系

Based on study of Palaeoproterozoic palaeo rift of Jiao Liao Ji area,an emplacement model of granitoid magmas in mid and deep crust under extension is proposed here, i.e. multiple injected granitoid magmas emplaces along detachment surface or cover/basement interface and migrates gradually far away from emplacement center. The model of granitoid magmas emplacement and crustal extension in mid or deep crust likes that of mid ocean ridge mafic magmas emplacement and oceanic spreading exactly. It is perhaps an efficient mechanism of rapid crustal growth. A series of bedding slide structures (or bedding delamination structural series) are derived from gravitational instability of overlayered sedimendary cover coeval with granitoid magmas upwelling. We call structural assemblage of cover, basement or granite (core) and contact plane between cover and core as uplift bedding delamination structural series (UBDS).