Abstract
The Geological Survey of Pakistan conducted a geophysical investigation as part of its research and development program in 2023-24. The focus was on exploring metallic minerals on recommended Aeromagnetic Anomalies (AMAs), especially Anomaly No.47 in the Chagai area of Chagai District, Balochistan. The investigation employed Ground Magnetic and IP/Resistivity Wenner methods to uncover valuable insights. The operation was carried out using the above-mentioned technique for exploring subsurface properties, to thoroughly cover the identified area of interest already proved auspicious in previous expeditions in Siah-Dik and Mashki Chah at AMA No.19 & 18 respectively. Upon the project’s completion, noteworthy discoveries were made in the area of AMA No.47. Within this anomaly, two distinct zones were identified and earmarked, exhibiting low magnetic properties but with a high chargeability. Additionally, a third zone was identified in the western part of the area with high magnetic properties. Further, investigations expanded this area from Northern towards southern direction, aiming to encompass the entire anomalous zone. The site is recommended for base metal targets in the Chagai belt with B-type magnetic anomaly, i.e. zones of reduced magnetization are suggestive of an environment that may involve porphyry-type mineralization. A high priority is given to the anomalies in the periphery of the Balanosh intrusive. These findings suggest promising prospects for mineral exploration in the region, especially in terms of sulphide mineralization like copper deposits within the marked zones. Anomalies with varying magnetic and chargeability characteristics hint at diverse mineral compositions, motivating further exploration and detailed assessments in the western zone.
Keywords:
Aeromagnetic Anomaly No.47, Iron, Copper, Chagai, Pakistan
