Carbon isotope systematics of individual hydrocarbons in hydrothermal petroleum from Middle Valley, Northeastern Pacific Ocean

摘要

Individual aliphatic hydrocarbons in samples of bulk hydrothermal petroleum from Middle Valley (ODP Site 858) were submitted to compound specific isotope analysis to trace their origins. The C isotope compositions of the nalkanes and isoprenoid hydrocarbons [means n-alkanes: -30.1 +/- 1.01 (858A), -28.3 +/- 1.7 (858C) and -24.8 +/- 1.4 (858D)parts per thousand; isoprenoids: -26.0 +/- 2.7 (858C) and -27.9 +/- 0.4 (858D)parts per thousand, respectively] reflect mixed marine and terrestrial organic matter sources. Biphytane from thermophiles has a delta(13)C value of -21.0parts per thousand. (C) 2002 Elsevier Science Ltd. All rights reserved. [References: 19]