The identification of crocetane in Australian crude oils

被引：25

作者：

Barber, CJ ^{[1
]}

Grice, K ^{[1
]}

Bastow, TP ^{[1
]}

Alexander, R ^{[1
]}

Kagi, RI ^{[1
]}

机构：

[1] Curtin Univ, WA State Ctr Excellence Mass Spectrometry, Ctr Petr & Environm Organ Geochem, Perth, WA 6845, Australia

来源：

ORGANIC GEOCHEMISTRY | 2001年 / 32卷 / 07期

关键词：

crocetane; 2,6,11,15-tetramethylhexadecane; PMI; 2,6,10,15,19-pentamethylicosane triassic Ordovician; Devonian; Western Australia;

D O I：

10.1016/S0146-6380(01)00057-2

中图分类号：

P3 [地球物理学]; P59 [地球化学];

学科分类号：

0708 ; 070902 ;

摘要：

The C-20 irregular isoprenoid crocetane (2,6,11,15-tetramethylhexadecane) has been unambiguously identified in a series of Western Australian crude oils From the Canning (Ordovician/Devonian) and Perth (Lower Triassic) Basins. PMI (2,6,10,15,19-pentamethylicosane) was found to co-occur with crocetane in the same samples. In addition, a newly observed series of C-22-C-24 irregular isoprenoids possessing the same carbon skeleton have also been tentatively identified in each of these crude oils on the basis of GC retention times and mass spectral characteristics. This may indicate a source for crocetane, in the Canning acid Perth Basin crude oils, from the diagenesis of PMI. The stable carbon isotopic composition for combined crocetane/phytane in these samples suggests crocetane is not unusually depleted in C-13 compared with all previous reports. This is the first reported occurrence of biomarkers attributable to methanogenic archaea in crude oils. (C) 2001 Elsevier Science Ltd. All rights reserved.

引用

页码：943 / 947

页数：5

共 19 条

[1] Analysis of crocetane in crude oils and sediments: novel stationary phases for use in GC-MS [J].