Greenwood Peak, Arizona

Greenwood Peak is a copper porphyry project (the 'Project") located ~25 kilometers southwest of the Bagdad mine, in western Arizona. The Greenwood Peak Project is under an option agreement with a wholly owned subsidiary of Antofagasta plc (“Antofagasta”). The Agreement provides for work commitments as well as cash payments to EMX during Antofagasta's earn-in period, and upon earn-in, a 2% NSR royalty interest in addition to milestone and pre-production payments to EMX's benefit (see EMX news release dated December 18, 2017).  

EMX originally identified the Project's prospectivity by the recognition of copper porphyry-style quartz-sericite-pyrite veining and alteration in outcrops adjacent to a covered target area. These outcrops are interpreted as the western, distal edge of a porphyry system that has been down-dropped eastward and covered by onlapping post-mineral sediments. EMX and Antofagasta are targeting supergene and hypogene copper mineralization related to a porphyry system interpreted to be concealed beneath unconsolidated sediments and shallow cover rocks. 

Note: The nearby mines and deposits in the region provide context for EMX's Project, but this is not necessarily indicative that the Project hosts similar mineralization, tonnages or grades.



WSW-ENE cross section showing the porphyry system cut and offset by both down-to-the-east and down-to-the-west normal faults. Approximately 25° of southwesterly tilting accompanied the extensional faulting in this area, which results in a porphyry system that plunges steeply off to the NE. Click to Enlarge
Simplified geologic map highlights the contact between Proterozoic basement and post-mineral Quaternary-Tertiary cover. Quartz-sericite-pyrite mineralization has a northeasterly orientation with alteration intensity vectoring toward post-mineral cover. The most intense alteration is offset by both down-to-the-east and down-to-the-west normal faults. Historic drill holes are shown as red circles, and labeled with collar ID, depth to bedrock, and total depth. Click to Enlarge


Oxidized QSP vein surface from near the western limit of sericitic alteration. Click to Enlarge