TY - RPRT TI - Sulphur and oxygen sequestration of n-C37 and n-C38 unsaturated ketones in an immature kerogen and the release of their carbon skeletons during early stages of thermal maturation AU - M.P. Koopmans AU - C. Schaeffer-Reiss AU - J. W. De Leeuw AU - M. D. Lewan AU - J.R. Maxwell AU - P. Schaeffer AU - Damste J.S. Sinninghe PY - 1997 DO - 10.1016/s0016-7037(97)00099-9 UR - https://pubs.usgs.gov/publication/70019999 ID - 70019999 ER -