01585nab a2200205 4500 20260525052259.0 260224s2011 xxu Clauer, Norbert 13870 Jourdan, Fred 52235 Zwingmann, Horst 46821 Dating petroleum emplacement by illite 40Ar/39 laser stepwise heating Discussion dic. 2011 28/03/2012 ; 28/03/2012 4 p. ; 2107-2111 Transcripción del resumen del autor: Isotopic dating of diagenetic processes in relation to hydrocarbon charge in buried sedimentary sequences is of importance to the oil industry. Yun et al. recently published in the AAPG Bulletin (v. 94, no. 6, p. 759-771) on that topic a study entitled, "Dating Petroleum Emplacement by Illite 40Ar/39Ar Laser Stepwise Heating Technique." This study raises questions about basic aspects of 40Ar/39Ar dating fine-grained authigenic clay minerals, describes flawed methodology, and ignores important previous work. As isotopic dating of diagenetic processes may interest readers of the AAPG Bulletin that are not necessarily specialists in either isotopic geochronology or clay mineralogy, it appeared necessary to comment on both the technical aspects and the scientific interpretations of this study. We discuss especially the fact that the authors discarded 39Ar recoil followed by an evaluation of its impact on the results and the interpretations. 12 AAPG Bulletin 95 ARTICULO ddc 186905 186905 0 0 0 0 254724 BAAB BAAB 2026-03-06 200059010 0 200059010 2026-03-06 00:15:03 2026-03-06 ARTICULO