Metamafic and metaultramafic rocks and amphibolite are common throughout the region of occurrence of the Amparo and Itapira metamophic complexes. A regional study of these rocks is presented for an area between the cities of Socorro and Amparo in the south and Monte Siao and Itapira in the north. Field and petrographic data indicate that these rocks may be classified into four groups, represented by hornblende schist, amphibolite, orthopyroxene amphibolite and metaultramafic units. The last one is interpreted as a cumulate based on petrographic features and olivine and pyroxene contents. Geochemical data show evidences of magmatic derivation, and a tholeiitic sub alkaline composition. Sub alkaline basalt, andesi basalt and picro basalt or picrite can be recognized in the classification diagrams. Some samples show MgO contents between 6,30 and 8,41% and are grouped as low MgO (MBM) and others have MgO contents between 12,31 and 28, 81% and are grouped as high MgO (MAM). The sample with 28,81% MgO is the metaultramafic that is considered to be a cumulate, with very high Cr and Ni contents. The rocks of the MAM group present in the diagrams trends of magmatic differentiation that are not confirmed by fractional crystallization tests. Besides the high Ce anomalies may be related to process involving the continental crust in the generation of the protolith from the mantle or during emplacement. Also the spidergrams show that these rocks have been affected by the continental crust related to the mantle source or to the intrusion time. As an example are the anomalies of Sr, K, Rb and Ba. The metamorphic effects are also evident when some discrepant signatures are observed in spidergrams of incompatible elements. Even so, it is still possible to recognize E-MORB type signatures shown by the multi element diagrams for the metamafic and amphibolite, with the ultramafic being more primitive.