Abstract
In the fall of 2020, GSP carried out ground geophysical surveys in the Siahdik area adjacent to the previous project between GSP and SML. The project area is located about 80 kilometers from Nokkundi City. The geophysical campaign was completed between October 23 and November 14, 2020, and consisted of 38 line-km of magnetics and 42 Wenner points for induced polarization and resistivity (see section 3.1). The 39 Wenner profiles were acquired on the areas selected by magnetic survey and 3 profiles were undertaken on the previously drilled holes for correlation. For the previously explored deposits extension magnetic and IP surveys were designed in a way to fully cover the porphyry system. Magnetic data is valuable for mapping lithological and structural trends. A recent ground survey confirmed and detailed magnetic bodies potentially linked to buried porphyry systems. The magnetic responses indicate easterly to northeasterly epithermal trends. The IP survey targeted large buried porphyry targets, revealing high-priority anomalies with silica caps over low resistivity and high chargeability zones. While not designed for other targets, the IP data aligns with geological models, suggesting ore shoots within steep, northeastern dipping layers of specific material. For the time being, the main exploration targets were delineated following surface sampling and stream geochemistry surveys. For the current exploration program, the objective is to map the copper-bearing deposits based on their MAG and IP signature, and previously explored areas whilst assuming that the delineated structures will host copper, gold, and silver-bearing mineralization. The combined project of geology and geophysics is a resourceful measure for opus exploration. The MAG and IP maps indicate the presence of broad (about 6 sq km)geophysical (lithological) domains likely delineated by faults that may have served as conduits for feeder fluids. The primary mineralization mapped on this grid is believed to be part of the same north-south striking anomalous horizon, forming a shear zone corridor. The full extent of this corridor between the two prospects is determined. The mineralizing events within this corridor may be influenced by the northwest dipping of the Siahdik Range.
Keywords: Siah Diq, Porphyry Cu-Au, Volcano Magmatic Arc, Chagai
