Aromatic components of coal: relation of distribution pattern to rank

Radke, M.; Willsch, H.; Leythaeuser, D.; Teichmüller, Marlies

doi:10.1016/0016-7037(82)90122-3

Cited by 473 publications

(177 citation statements)

References 36 publications

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“…4. Both parameters are designed to be a measure 274 of maturity (Radke et al, 1982), however the relationships between the 275 parameters in Bitumens I and II are distinct. MPI-1 for Bitumen I is 276 consistently significantly higher than in Bitumen II (Fig.…”

Section: Stable Carbon Isotope Analysis 250mentioning

confidence: 99%

Bitumen II from the Paleoproterozoic Here’s Your Chance Pb/Zn/Ag deposit: Implications for the analysis of depositional environment and thermal maturity of hydrothermally-altered sediments

Holman¹,

Grice²,

Jaraula³

et al. 2014

Geochimica et Cosmochimica Acta

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Section: Stable Carbon Isotope Analysis 250mentioning

confidence: 99%

Bitumen II from the Paleoproterozoic Here’s Your Chance Pb/Zn/Ag deposit: Implications for the analysis of depositional environment and thermal maturity of hydrothermally-altered sediments

Holman¹,

Grice²,

Jaraula³

et al. 2014

Geochimica et Cosmochimica Acta

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“…In low-rank coals they may derive mainly from chemical and/or microbiological transformations of terpenoid precursors trapped in the coal, which undergo successive aromatization during peatification/coalification (Hayatsu et al, 1978;Chaffee et al, 1986). In higher rank coals the main PACs derived probably from the macromolecular coal matrix by partial fragmentation of the polymeric network during coalification (Hayatsu et al, 1978;Radke et al, 1982).…”

Section: Polycyclic Aromatic Compounds (Pacs)mentioning

confidence: 99%

Variation in the content and distribution of biomarkers in two closely situated peat and lignite deposits

Rı́o

Vila

Martı́n

1992

Organic Geochemistry

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Abstract--A peat and two lignite samples taken from closely situated deposits in the Granada Basin (South Spain) were analysed for their lipid composition. Variations in the distributions and abundances of various compound classes including normal, branched and unsaturated fatty acids, aliphatic hydrocarbons, aliphatic and steroid alcohols and ketones, aldehydes, diterpenoids and triterpenoids suggest that a gradient in maturity exists among the samples indicating that the lignites were generally more mature than the peat. In spite of their similar rank, a different hopane distribution was observed between both lignite samples. Source materials include contributions from terrigenous (coniferous) higher plants as well as microbial sources. A possible contribution from marine phytoplankton can also be inferred in the lignite on the basis of the sterol distribution.

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“…As the chemical structures of alkylcarbazoles are similar to those of the alkyl dibenzothiophenes, Clegg et al (1998b) suggested that alkylcarbazoles may be formed through alkylation of the parent compound and interconversion of isomers in similar ways to those proposed for dibenzothiophenes (Radke et al, 1982), phenanthrenes (Alexander et al, 1995) and phenols (Ioppolo-Armanios et al, 1994). This suggestion may be quite plausible if potential source rocks across a wide range of thermal maturity are concerned, e.g.…”

Section: Dmc/18dmc+1ecmentioning

confidence: 91%

Occurrence and Geochemical Significance of Carbazoles and Xanthones in Crude Oil from the Western Desert, Egypt

Bakr¹

2009

ear

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Abstract. This paper describes an approach that involves the evaluation of the occurrence and distributions of nitrogen-and oxygen-containing aromatic compounds in Egyptian crude oils and source rocks. Carbazoles and xanthones represent nitrogen-and oxygen-containing aromatic compounds, respectively.Alkylcarbazoles and benzocarbazoles were quantitatively studied in crude oils taken from the Abu Gharadig and Shushan basins in north Western Desert of Egypt in order to investigate their occurrence, concentrations and distributions. The abundances of carbazole, methylcarbazoles and dimethylcarbazoles in the marine Abu Gharadig oils are much higher than that of the terrestrial Shushan oils. The results presented here indicate that thermal maturation can be ruled out as a major factor in controlling the changes in the carbazole ratios in the crude oils. Most likely, source characteristics of the studied samples play a significant role in controlling the distribution of carbazole compounds in reservoired oils. The alkylcarbazoles 1MC/1MC+1EC, 3MC/4MC and 18DMC/18DMC+1EC when correlated with specific biomarker signatures provide background information discriminating between two main types of depositional setting: 1) Terrestrial dominated source deposited in oxidizing conditions for the Shushan oils and, 2) marine shale dominated sourced oils deposited in suboxic environments for the Abu Gharadig samples. Similarly, benzocarbazole distributions were found to be independent of maturity, but influenced by organic facies and depositional environments. Therefore, in this study, alkylcarbazole and benzocarbazoles compounds are well suited for the differentiation of Abu Gharadig and Shushan crude oils with respect to origin and variations of facies and depositional environment. M.M.Y. Bakr 128Using various kinds of Egyptian crude oils derived from marine carbonates, marine clastics and terrestrial sources, the current study indicates that xanthones and its alkylated homologues are abundant only in source extracts and crude oils that have terrestrial organic matter input. This is the second description of xanthones in crude oils, and the first in Egyptian petroleum systems. Overall, based on the data of this study, xanthones signatures show great promise as terrestrial source markers in a given petroleum system.

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Aromatic components of coal: relation of distribution pattern to rank

Cited by 473 publications

References 36 publications

Bitumen II from the Paleoproterozoic Here’s Your Chance Pb/Zn/Ag deposit: Implications for the analysis of depositional environment and thermal maturity of hydrothermally-altered sediments

Bitumen II from the Paleoproterozoic Here’s Your Chance Pb/Zn/Ag deposit: Implications for the analysis of depositional environment and thermal maturity of hydrothermally-altered sediments

Variation in the content and distribution of biomarkers in two closely situated peat and lignite deposits

Occurrence and Geochemical Significance of Carbazoles and Xanthones in Crude Oil from the Western Desert, Egypt

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