Some Postulates on the Tectonomagmatism, Tectonostratigraphy and Economic Potential of Kirana – Malani Basin: Implications for Occurrence of Petroleum

Abstract

     The so called shield elements exposed to the west of the Aravalli Orogen and exposed in Kirana, Nagar Parkar, Jodhpur, Malani, Tosham, Mount Abu and Erinpura are neither a part of Aravalli Orogen nor do they belong to the Vindhyan Basin. These volcanoplutonic and sedimentary rocks represent a distinct cratonic rift assemblage. They were deposited in extensional basins formed as a result of rising of the mantle plume around 1000 ma. This basin is named by us as Malani-Kirana Basin. The stratigraphy of Kirana area has been revised and correlated with the Indian counterpart areas west of the Aravalli range. The Hachi volcanics are correlated with Tosham volcanics. The later are a part of an extensive volcanoplutonic igneous province with other centres in Rajasthan and Nagar Parkar. The overlying sedimentary packaqe of Kirana area is designated by us as Machh Super Group and it includes Tuguwali formation, Asianwala quartzites. Hadda quartzites and Sharaban conglomerates.
The Machh Super Group is correlated with the lower part of the Marwar Supergroup. The equivalents of the upper Marwar Super Group must occur in Pakistan to the south and south west of Kirana adjoining Bikaner – Nagaur Basin of India. Metamorphism in the Machh Super Group sediments must decrease in this direction, therefore hydrocarbon prospects may occur in Pakistani region adjoining hydrocarbon bearing Bikaner – Nagaur Basin of India.
Volcanic hosted massive oxide-sulfide deposits have recently been discovered in the subsurface in Hachi volcanics near Chiniot. Such deposits must exist throughout Kirana-Malani Basin west of the Aravalli Orogen.