Depositional Environments and Diagenetic History of the Lumshiwal Formation, Miranwal Nala Section, Surghar Range

Abstract

 Cretaceous sediments of the Lumshiwal Formation in the Miranwal Nala section, Surghar Range. are mainly composed of clastic deposits. The formation in the study area was deposited in a fluvial-dominated deltaic environment and there was continuous sedimentation from the base of the Lumshiwal Formation to the lower part of the Hangu Formation. The analyzed sandstone samples have been classified as quartzarenites with minimum 97% detrital quartz grains. The sediment-petrographic study indicates that the Lumshiwal Formation is not a good potential reservoir for hydrocarbon in the studied area.