Petrographic properties and physical-mechanical characteristics of Salang marbles located in Parwan province, Afghanistan

This research examines Salang marble's petrographic properties and physical-mechanical characteristics in Parwan province, Afghanistan. Situated in the western Hindu Kush zone, these marbles are part of the Afghanistan-North Pamir Folded Region, surrounded by faulted structural units. Despite the lack of detailed information from the Afghanistan Geological Survey, including maps and reserve estimates, there has yet to be a comprehensive evaluation of the marble's quality, physical-mechanical properties, or material composition. Furthermore, research and exploration efforts in this area have been limited. The paper aims to discuss and provide conclusions and suggestions regarding petrographic properties, mineral paragenesis, and physical-mechanical characteristics. The marbles predominantly comprise calcite, constituting around 99% of the composition. Spectrometry analysis reveals the presence of elements and oxides such as calcium, aluminum, iron, magnesium, sodium, silicon, and strontium. The physical-mechanical properties of the Salang marbles, including specific gravity (2.70), bulk density (2.69 g/cm3), marble durability index (98.52 MPa), and resistance to impact value (16.38 GPa) of marble aggregates, are analyzed. This research involves collecting specimens from the mine area and conducting mechanical tests and petrographic studies following established norms and standards. The findings contribute to a better understanding of the Salang marbles and can inform future exploration and utilization of these valuable resources.