Estudio Magnético Sobre Un Cuerpo De Pórfido Emplazado En El Área De Marayes Viejo, Sierras Pampeanas Occidentales, San Juan, Argentina

A magnetic survey was carried out in an andesite porphyry<br>outcrop (PMV), located in the southwestern end of the La<br>Huerta range, Western Pampean Ranges, San Juan,<br>Argentina. The PMV was intruded within the<br>precambrian-lower paleozoic crystalline basement, and<br>covered in non-concordance by triassic sedimentary<br>rocks. Vein and disseminated sulfide mineralization was<br>recognized in the PMV.<br>To increase previous knowledge, twenty N45°W magnetic<br>profiles, with variable length between 400-725 m and<br>separated 25 m, were laid out.<br>The qualitative interpretation of the resulting magnetic<br>maps (Total Field, Analytic Signal and Vertical Derivate),<br>allowed to outline the PMV in depth and distinguish it<br>from the surrounding lithologies. They also showed the<br>main structures present in the area.