Bituminological Studies of the Samples from Site 379 and Laboratory Simulation of Dispersed Organic Matter Transportation

Geodekyan, A. A.; Ulmishek, Gregory F.; Tchernova, T.G.; Avilov, V. I.; Bokovoy, A.P.; Verkhovskaya, Z. I.; Fedorova, M.S.

doi:10.2973/dsdp.proc.42-2.129.1978

Cited by 2 publications

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“…The content of TOC-normalized EOM1 (β; Table 2) shows values less than 6% in most of the samples attesting to the syngenetic type of bituminous components of OM and the host rock [69,71,72]. The exception is sediments enriched in oil (sites 7 and 8), where bituminous components are of epigenetic origin (β up to 86%).…”

Section: Group Composition Of the Extractable Organic Mattermentioning

confidence: 99%

Molecular Indicators of Sources and Biodegradation of Organic Matter in Sediments of Fluid Discharge Zones of Lake Baikal

et al. 2022

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This paper performs a detailed study of a wide set of organic-geochemical proxies in 15 sediment cores collected from the main basins of Lake Baikal (the northern, the central and the southern) where processes of focused fluid discharge were detected. A variety of studied zones includes sites with gas and hydrothermal seepage, mud volcanoes with or without gas-oil fluid discharge, gas hydrates and authigenic carbonates. The composition of the dispersed organic matter and individual hydrocarbon molecular markers (n-alkanes, dimethyl alkanes, isoprenoids, steranes, terpanes and polycyclic aromatic hydrocarbons) testify to the input from predominantly allochthonous terrestrial and autochthonous microbial and algal sources. The studied sources, maturity and biodegradation parameters of organic matter vary significantly for areas with different fluid discharge. The composition of specific biomarkers including isoprenoids and immature hopanoids reflects the lateral and vertical changes of microbial activity in sediments associated with various environmental conditions. The identified types of terpanes distribution (mature, mixed and immature) correlate well with types of fluid discharge and attest to the development of various methanogenic and methanotrophic microbial communities in sediments. Moreover, the revealed specificity of microbial molecular markers distribution allowed us to suggest the fluid discharge processes in zones where they were not previously detected.

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Section: Group Composition Of the Extractable Organic Mattermentioning

confidence: 99%

Molecular Indicators of Sources and Biodegradation of Organic Matter in Sediments of Fluid Discharge Zones of Lake Baikal

et al. 2022

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“…The procedure is diagrammed in Figure 1. Details have been described earlier (Geodekyan et al, 1978) except for two operations: (1) removal of elemental sulfur from chloroform extract (butimen A ch i) and (2) removal of mineral salts from the alcohol-benzene extract (A a i b ).…”

Section: Methodsmentioning

confidence: 99%

Chemical and Bituminological Studies from Holes 434, 434A, and 434B, Deep Sea Drilling Project

Geodekyan¹,

Chernova²,

Trotsyuk³

et al. 1980

Initial Reports of the Deep Sea Drilling Project

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Geochemical investigation of 18 samples of sediments from Site 434 involved determining the content of organic carbon, of bitumoid A (The chloroform A^ and alcohol-benzene A alb extracts) and its various fractions, and of individual hydrocarbons as well as the structural group composition of resins. We identified certain samples that differed sharply from the rest by their increased bitumen content and relatively low molecular hydrocarbons and by the fact that their resinous components were more neutral and aliphatic in composition. The distribution of bitumoid and its components seems to reflect migration processes in operation during the early stages of the transformation of organic matter.

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Bituminological Studies of the Samples from Site 379 and Laboratory Simulation of Dispersed Organic Matter Transportation

Cited by 2 publications

References 0 publications

Molecular Indicators of Sources and Biodegradation of Organic Matter in Sediments of Fluid Discharge Zones of Lake Baikal

Molecular Indicators of Sources and Biodegradation of Organic Matter in Sediments of Fluid Discharge Zones of Lake Baikal

Chemical and Bituminological Studies from Holes 434, 434A, and 434B, Deep Sea Drilling Project

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