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Controls on epithermal and orogenic gold mineralisation in Argentina


This two year research project was funded by Troy Resources in order to generate a series of GIS-based prospectivity maps and to delineate targets for different gold systems and various styles of gold mineralization in Argentina, from country-scale to district-scale analyses, with a focus on the Casposo low sulfidation epithermal gold system in the Frontal Cordillera, San Juan province in Argentina. 

The CET generated and acquired new geological, structural and geophysical maps for Argentina in GIS format and revised many existing datasets using this new information as well as information available in company reports and scientific literature. A comprehensive review of the gold metallogeny in Argentina was undertaken and a series of gold system models developed, including: orogenic gold, high and low sulfidation epithermal gold and porphyry copper-gold. Proxies for the processes in the mineral system models were extracted from the available datasets and integrated using both conceptual and empirical methods to produce a series of gold prospectivity maps. Prospectivity maps were able to delineate targets at the country-, province-, terrane- and district-scale. The validity of the prospectivity maps was determined by their ability to predict known gold mineralization. A revised camp-scale structural interpretation was produced by John Miller over the Casposo district. Steffen Hagemann, Sebastian Grignola and AnaFogliata are working on a paleohydrothermal reconstruction of the hydrothermal fluid system at the Casposo deposit. Sebastian Grignola is conducting his PhD project on the geochonological setting of the Casposo deposit and Agustina Cocola is studying the stratigraphic setting and paleohydrothermal system of the Castano gold deposit (about 20km north of the Casposo deposit) for her PhD project.