Northern Victoria Land, the region located at the Pacific termination of the Transantarctic Mountains, is made up of three main lithotectonic units assembled during the Early Paleozoic Ross Orogeny. To better constrain the emplacement mechanisms and origin of orogenic magmatism, it is particularly valuable the study of intrusions close to major crustal boundaries, such as that cropping out in the Morozumi Range (Wilson terrane). Preliminary studies in the area were carried out in the 1970's by New Zealand geologists and by the German GANOVEX teams in the 1980's. Our recent field and petrochemical investigations of the Morozumi Range Intrusive Complex allowed to recognize different lithologic units (Morozumi granite, Jupiter Granite, Morozumi Granodiorite, Morozumi Diorite and Morozumi tabular intrusions). These units, characterized by complex evolutionary genetic relationships, possibly derived from different crustal and subcrustal sources and emplaced in a rather short time interval.