Tasmanian tasmanite: II - compound specific isotope analyses of kerogen oxidation and Raney Ni reduction products

摘要

Compound specific isotope analyses have been carried out on carboxylic acids from kerogen oxidations and hydrocarbons from Raney Ni reduction/desulfurization of maltenes from Tasmanian tasmanite. The carboxylic acids (alkanedioic and cyclic acids) have a mean delta(13)C of -10.5 +/- 0.9parts per thousand, in the same range as the cyclic terpanes of the bitumen. The extended tricyclic terpanes (C-21-C-40) from the Raney Ni reduction have a mean delta(13)C of - 10.0 +/- 1.9parts per thousand, also in the same range as the tricyclanes of the bitumen. These data further support the proposed origin of the tricyclic terpanes from these tasmanite algae. (C) 2004 Elsevier Ltd. All rights reserved.