The microbial input in carbonate-anhydrite facies of a sabkha palaeoenvironment from Guatemala: A molecular approach

Connan, Jacques; Bouroullec, Jean-Luc; Dessort, Daniel; Albrecht, Pierre

doi:10.1016/0146-6380(86)90007-0

Cited by 297 publications

(107 citation statements)

References 20 publications

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“…The proportion of C 24 tetracyclic terpane relative to tricyclic terpanes may also be facies dependent. For example, high amounts of C 24 tetracyclic terpane have been found in carbonate (Connan et al, 1986;Clark and Philp, 1989;Peters et al, 2008) and terrestrial (Philp and Gilbert, 1986;Hanson et al, 2000) samples. Therefore, the difference in the distributions of these tricyclic and tertacyclic terpanes can be used for oil family classification (Zhang and Huang, 2005).…”

Section: Distribution Of Tricyclic and Tetracyclic Terpanes In Crude mentioning

confidence: 99%

Geochemical application of tricyclic and tetracyclic terpanes biomarkers in crude oils of NW China

Tao

Wang

et al. 2015

Marine and Petroleum Geology

124

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a b s t r a c tComposition and distribution of tricyclic terpanes, tetracyclic terpanes and hopane in crude oils from Tarim, Turpan, Ordos and Qaidam basins, NW China, were investigated, and some new source dependent parameters were developed and evaluated. C 19 and C 20 tricyclic terpanes are more abundant in terrigenous oils, with C 24 tetracyclic terpane dominant. Relatively higher carbon number tricyclic terpanes, especially C 23 tricyclic terpane, are often the dominant homologues in crude oils from saline lacustrine and marine sources. On the whole, the relative content of C 23 tricyclic terpane of crude oils follow the order of saline lacustrine oils > marine oils > freshwater lacustrine oils > terrigenous oils for C 19e23 tricyclic terpane. Some new parameters based on the tricyclic/hopane and tetracyclic/tricyclic terpane as well as tetracyclic/hopane ratios, could be used to distinguish the oils and source rocks with similar maturity deposited in different sedimentary environments.

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Section: Distribution Of Tricyclic and Tetracyclic Terpanes In Crude mentioning

confidence: 99%

Geochemical application of tricyclic and tetracyclic terpanes biomarkers in crude oils of NW China

Tao

Wang

et al. 2015

Marine and Petroleum Geology

124

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“…Associated with the evident UCM and the intact n-alkanes in same oil samples, it is widely accepted that these oils are mixture of a severely palaeobiodegraded oil containing 25-norhopanes and fresh oil containing n-alkanes (Volkman et al, 1983;Campos et al, 1996;George et al, 1998;Peters et al, 2005;Wang et al, 2008). In addition, low Pr/Ph (0.94-1.18), high C 29 /C 30 hopane (0.83-1.37), high Gammacerane/C 30 H (0.23-0.82), high C 21 pregnane/C 29 regular steranes ratios (2.54-4.69), and predominance of dibenzothiophene abundance (61.18-74.19%) in the series of dibenzothiophene-dibenzofuran-fluorene observed for the Halahatang oils suggest a restricted, clastic starved, anoxic, reduced carbonate depositional setting (Didyk et al, 1978;ten Haven et al, 1986;1988;Zumberge, 1984;Connan et al, 1986;Clark and Philp, 1987;Requejo et al, 1997;Hughes et al, 1995).…”

Section: General Characteristics Of the Oil Samplesmentioning

confidence: 99%

Maturity Assessment of Severely Biodegraded Marine Oils from the Halahatang Depression in Tarim Basin

Chang

Wang

Cheng

et al. 2012

Energy Exploration & Exploitation

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Seventeen Ordovician oil samples from Halahatang Depression are investigated for their thermal maturation. On the basis of GC analysis of the alkane fraction as well as GC-MS analysis of the demethylated hopanes, it is assumed that the oils are mixtures of severely biodegraded and nonbiodegraded oils. Therefore, their maturation is assessed on the basis of the distribution and abundance of compounds strongly resistant to biodegradation. The P 1 together with the P 2 values of C 7 light hydrocarbons suggest that the late filled nonbiodegraded oils for Halahatang are super mature. Triterpane and sterane isomerization maturation parameters indicate they barely reached the peak oil generation stage, consistent with the results obtained from the equivalent vitrinite reflectance Rc 1 (0.80-0.95%), while the Rc 2 (1.28-1.60%) delineate a high maturity of Halahatang oils. However these conventional triterpane and sterane isomerization maturation parameters gave only general information and a comparatively narrow range of maturity. Correlation between the maturation parameters of Pr/nC 17 and Ph/nC 18 , Ts/(Ts + Tm) and C 29 Ts/(C 29 Ts + C 29 H), MPI 1 and MPI 3 , 4-/1-MDBT and 4, 6-/1,4-DMDBT are rather good, confirming the validity to assess and differentiate the maturity of the severely biodegraded oils examined, with the exception of naphthalene maturation parameters(DNR 1 and TNR 2 ). According to the maturation classification assembled with selected effective maturity parameters, such as the MPI 3 together with the corresponding [P], the thermal maturities of Halahatang oils are moderate, while Ts/(Ts + Tm) together with 4-/1-MDBT demonstrate a moderate-high maturity.

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“…Despite their ambiguous origin, the differences in their distributions (e.g. Connan et al, 1986;Sinninghe Damsté et al, 1993) indicate that alkyl benzenes, like other unambiguous biomarkers, can be characteristic of specific microbial communities or associated with particular depositional conditions (Holzer et al, 1979;Connan et al, 1986;Sinninghe Damsté et al, 1993;Killops et al, 2014).…”

Section: Introductionmentioning

confidence: 99%

“…However, the origin of most of these biomarkers is not well established and various formation pathways have been proposed. For example, alkyl benzenes and ring-methylated homologues may be formed either by direct biosynthesis by specific communities of archaea (Holzer et al, 1979;Sinninghe Damsté et al, 1988, diagenetic conversion of isoprenoid quinones (Connan et al, 1986;Sinninghe Damsté et al, 1988), cyclisation and aromatisation of fatty acids and alcohols (Dong et al, 1993;Ellis et al, 1995Ellis et al, , 1999 or by diagenetic degradation (Killops et al, 2014), for instance of specific carotenoids such as isorenieratene (Summons and Powell, 1987). Despite their ambiguous origin, the differences in their distributions (e.g.…”

Section: Introductionmentioning

confidence: 99%

Occurrence and significance of phytanyl arenes across the Permian-Triassic boundary interval

Grotheer

Métayer

Piggott

et al. 2017

Organic Geochemistry

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a b s t r a c tPhytanyl benzene and phytanyl toluene occur in mudstones from several key Permian-Triassic Boundary (PTB) sections from mid-northern palaeolatitudes (Spitsbergen and Eastern Greenland), as well as mid-southern palaeolatitudes (Western Australia). The occurrence of these compounds through the different PTB sections is related to the occurrence of the previously identified C 33 n-alkyl cyclohexane, suggesting their parent organism shared a similar unique ecological niche and was associated with the extinction horizon. Further, the lack of these compounds in the carbonate-dominated palaeoequatorial, Global Stratotype Section and Point (GSSP), Meishan-1 (South China) section possibly points to their source being temperature and climate controlled.

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The microbial input in carbonate-anhydrite facies of a sabkha palaeoenvironment from Guatemala: A molecular approach

Cited by 297 publications

References 20 publications

Geochemical application of tricyclic and tetracyclic terpanes biomarkers in crude oils of NW China

Geochemical application of tricyclic and tetracyclic terpanes biomarkers in crude oils of NW China

Maturity Assessment of Severely Biodegraded Marine Oils from the Halahatang Depression in Tarim Basin

Occurrence and significance of phytanyl arenes across the Permian-Triassic boundary interval

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