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Hydrogen isotopic (D/H) composition of organic matter during diagenesis and thermal maturation

Schimmelmann, Arndt and Sessions, Alex L. and Mastalerz, Maria (2006) Hydrogen isotopic (D/H) composition of organic matter during diagenesis and thermal maturation. Annual Review of Earth and Planetary Sciences, 34 . pp. 501-533. ISSN 0084-6597. doi:10.1146/

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Changes in the D/H ratio of sedimentary organic matter (SOM) during thermal maturation have been difficult to interpret because the effects of hydrogen exchange and kinetic fractionations are confounded in natural samples. Recent analytical developments have significantly improved our understanding of the responsible mechanisms. In this paper, we review experimental and field data that document a progressive increase in the D/H ratio of most organic hydrogen at the bulk and molecular levels, and suggest that the transfer of hydrogen from water to organic matter is the most important mechanism leading to those changes. SOM and water in natural petroleum systems approach a pseudoequilibrium D/H fractionation of about −80 to −110‰. D/H ratios of organic hydrogen can preserve quantitative information about paleoclimate throughout diagenesis, and some qualitative information through catagenesis.

Item Type:Article
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Schimmelmann, Arndt0000-0003-4648-5253
Sessions, Alex L.0000-0001-6120-2763
Additional Information:© 2006 by Annual Reviews. First published online as a Review in Advance on January 20, 2006 This work was supported by U.S. Department of Energy Basic Energy Research Grant number DEFG02–00ER15032 to A. Schimmelmann and M. Mastalerz, and by National Science Foundation EAR-03, 11824 to A. Sessions.
Funding AgencyGrant Number
Department of Energy (DOE)DE-FG02–00ER15032
Subject Keywords:deuterium, fossil fuel, isotope exchange, isotope fractionation, catagenesis
Record Number:CaltechAUTHORS:SCHIareps06
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Official Citation:HYDROGEN ISOTOPIC (D/H) COMPOSITION OF ORGANIC MATTER DURING DIAGENESIS AND THERMAL MATURATION. Arndt Schimmelmann, Alex L. Sessions, Maria Mastalerz Annual Review of Earth and Planetary Sciences 2006 34:1, 501-533; doi: 10.1146/
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:5026
Deposited By: Archive Administrator
Deposited On:22 Sep 2006
Last Modified:08 Nov 2021 20:22

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