Main oil generating macerals for coal-derived oil: A case study from the Jurassic coal-bearing Turpan Basin, NW China

摘要

Highlights ? Generation potential, biomarkers and isotopes were investigated for coal macerals. ? Liptinite and vitrinite in mudstones generate 70% and 30% of oils respectively. ? Mudstone is a major source rock of oil in the Jurassic coal-bearing basins in China. Abstract This paper examines the geochemical characteristics of pyrolysates from macerals such as the alginite, sporinite, cutinite, collotelinite and collodetrinite isolated from Jurassic coals and investigates their relative contributions to oil potential in respect to the Jurassic coal measures in the Turpan and other basins of northwest China. The alginite pyrolysate has the lightest carbon isotopic composition, f