The Precambrian in eastern Paraguay is present mainly in two areas in the north and in the south; at the Apa High in the former and at the Caapucu Height in the latter which is constituted by Rio Tebicuary complex; to the north of this river is exposed the Caapucu Hight (Jaguarete Kua plug). Recently, geochemical studies were performed in the Precambrian plug of Fuerte San Carlos, near the Apa River providing analytical data in this regard. In this work hand specimen of granitoid rocks from the southern Jaguarete kua outcrops are studied in some of their major, minor and trace elements aiming to look for relationships with the northern outcrops and their provenance as well as the granitoid type. The analyzed elements were Na, Al, Si, K, Ca, Ti, Mn, Fe, Cu, Zn, Ga, Pb, Rb, Sr, Th, Y, Zr, Nb, Ba, La, Ce, Pr, Nd. Analyses were carried out by EDXRF except for sodium that was analyzed by Neutron Activation. The XRF experiments were carried out using the facility of Josef Stefan Institute in Ljubljana, whereas NAA was done with an Am‐ Be neutron source with a flux of 5 x10⁷ns ^-1 at the Facultad de Química (UNA), Paraguay. The results of analysis allow to establish inter alia indexes, ratios which are related with crystallization, granitoid type etc. The spidergrams standardized to primordial mantle of refractory elements content, show an enrichment of incompatible elements in the samples. Besides, they resemble to those found in Precambrian (Neoproterozoic) outcrops from the northern area (eastern and the Paraguayan Chaco), as well as from Brazil.

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