Organic geochemistry and source rock potential assessment of Late Paleocene Patala Formation in Margalla Hill Range,North Pakistan

作     者：Shams M.Kamran WANG Pujun Nasar Khan Muhammad Hassan Shams M.Kamran;WANG Pujun;Nasar Khan;Muhammad Hassan

作者机构：College of Earth SciencesJilin UniversityChangchun 130061China Department of GeologyUniversity of MalakandChakdara 18800Khyber PakhtunkhwaPakistan 

出 版 物：《Global Geology》 (世界地质（英文版）)

年 卷 期：2021年第24卷第4期

页      面：213-225页

学科分类：081803[工学-地质工程] 08[工学] 0818[工学-地质资源与地质工程] 

基　　金：China Scholarship Council(CSC)for providing scholarship(No.2017SLJ019639) 

主　　题：Patala Formation organic geochemistry thermal maturity Margalla Hill Range North Pakistan eastern Tethys 

摘      要：Black shales of the Paleocene Patala Formation are proven source rocks for conventional hydrocarbons in southern Potwar Basin of Pakistan and are assumed to be effective source rocks towards north in the Margalla Hill Range of *** this regard,the current study focuses on source rock geochemistry of the Paleocene Patala Formation to assess its source rock potential,organic matter types and thermal maturity levels in the Margalla Hill Range of North *** rock generative potential,kerogen types and thermal maturation of the analysed rock samples were unraveled by using Rock-Eval pyrolysis T_(max),TOC(total organic carbon)and vitrinite reflectance(R_(0))*** analysis coupled with S_(2) yield revealed poor to fair source rock quality encountered within the *** pyrolysis T_(max) vs Hydrogen Index(HI),showed mostly Type Ⅲ kerogen dominated by thermally immature to mature organic *** HI and genetic potential is low and revealed poor hydrocarbon generation potential of the *** S_(1) vs TOC plots confirm the indigenous nature of the hydrocarbons hosted by Patala *** vitrinite reflectance outcomes indicated immature to mature source rock beds lying in dry gas *** HI and OI signatures and abundance of Type Ⅲ kerogen are indicating dominance of terrestrial organic matter within the ***,the investigated Patala Formation exposed at the studied section of Margalla Hill Range,Pakistan acts as a poor source rock unit for liquid hydrocarbon generation but holds prospects for dry gas generation in the study area.