Pablo Andrada de Palomera has a degree in geology from the University of Buenos Aires, and an MSc and a PhD degree from the University of Twente, in The Netherlands. His PhD thesis, defended in 2015, included the subjects of reflectance spectroscopy, geochemistry and mineral potential mapping, applied to mineral exploration in the Deseado Massif. He worked in mineral exploration since 1996, when he joined Compañía Minera Polimet. Since 1998, he work in Fomicruz S.E., where he is currently the Exploration Manager.
Potassium (K) is one of the elements that is usually added into veins and host rocks in geothermal systems, which are the systems that produce gold and silver low sulfidation epithermal deposits. The addition of K occurs by the formation of minerals such as illite and adularia; while illite may be deposited during hydrothermal alteration in the rocks that surround quartz veins, adularia, can be deposited as part of the veins. Adularia is usually interpreted as a product of adiabatic boiling, which is also one of the reasons of gold precipitation. Therefore, the concentrations of K can both assist in detecting hydrothermally altered rocks that may host mineralized veins, and to provide information about hydrothermal alterations that are difficult to recognize by geological observations. Recently, during the exploration of the Argenta project, located a few kilometers to the north of the Martha silver mine, Fomicruz acquired ground-based gamma-ray and reflectance spectroscopy data, with the aim of detecting potassium anomalies and to infer the sources of those anomalies. In this presentation, I will show preliminary interpretations of those data.