SEDIMENTARY AND GEOCHEMICAL EVIDENCE FOR TERRESTRIAL ORGANIC MATTER INPUT DRIVING ANOXIA EVENTS FOUND IN LATE DEVONIAN BLACK-GRAY SHALE TRANSITIONS, APPALACHIAN BASIN, NORTH-CENTRAL OHIO

<p>Fifteen samples were collected from coal mines Mae Than basins located in Lampang Province, Northern Thailand to investigate organic geochemical characterization which can provide organic matter input, thermal maturity and depositional environment. The total organic carbon (TOC) content of the coal samples ranges from 30.12 to 73.71 wt. %, while shales and mudstones value between 5.98 &#8211; 24.87 wt. %. The extractable organic matter (EOM) content of all samples, which is yielded from bitumen extraction, values in the range of 1,256 and 16,421 ppm indicating good to excellent hydrocarbon generation potential. The organic geochemical data were studied by using Gas-chromatography Mass-spectrometry (GC-MS) providincg biomarker and non-biomarker data. The thermal maturity of studied samples is represented as immature stage due to ratio of Ts/(Ts+Tm) and homohopane isomerization. The distribution of normal alkanes is predominantly long-chain normal alkanes with odd-numbered carbon. The high Carbon Preference Index (CPI) value of samples indicates terrestrial organic matter input. The depositional environment of the study area can be interpreted that the coal formation is occurred within an oxidizing condition with the majority of higher plant input, whereas shale and mudstone is slightly more anoxic-aquatic environment.</p>

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Biomarker evidence for changes in terrestrial organic matter input into the Yellow Sea mud area during the Holocene

Science China Earth Sciences ◽

10.1007/s11430-016-5283-y ◽

2016 ◽

Vol 59 (6) ◽

pp. 1216-1224 ◽

Cited By ~ 10

Author(s):

Peng Wu ◽

XiaoTong Xiao ◽

ShuQin Tao ◽

ZuoSheng Yang ◽

HaiLong Zhang ◽

...

Keyword(s):

Organic Matter ◽

Yellow Sea ◽

The Yellow Sea ◽

Terrestrial Organic Matter ◽

The Holocene ◽

Sea Mud ◽

Mud Area ◽

Organic Matter Input

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Late Cretaceous marine arthropods relied on terrestrial organic matter as a food source: Geochemical evidence from the Coon Creek Lagerstätte in the Mississippi Embayment

Geobiology ◽

10.1111/gbi.12270 ◽

2018 ◽

Vol 16 (2) ◽

pp. 160-178 ◽

Cited By ~ 1

Author(s):

M. B. Vrazo ◽

A. F. Diefendorf ◽

B. E. Crowley ◽

A. D. Czaja

Keyword(s):

Organic Matter ◽

Late Cretaceous ◽

Food Source ◽

Terrestrial Organic Matter ◽

Mississippi Embayment ◽

Geochemical Evidence

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The origins of paraffinic oils collected from oilfields in the western Siberian Basin, Russia: implications from geochemical and physical characteristics

Journal of Petroleum Exploration and Production Technology ◽

10.1007/s13202-021-01325-9 ◽

2021 ◽

Author(s):

Mohammed Hail Hakimi ◽

Shadi A. Saeed ◽

Ameen A. Al-Muntaser ◽

Mikhail A. Varfolomeev ◽

Richard Djimasbe ◽

...

Keyword(s):

Organic Matter ◽

Sulfur Content ◽

Source Rock ◽

Environmental Conditions ◽

Saturated Hydrocarbon ◽

Source Rocks ◽

Terrestrial Organic Matter ◽

Low Sulfur Content ◽

Low Sulfur ◽

Organic Matter Input

AbstractFour oil samples were collected from oilfields in the western Siberian Basin, and analyzed using conventional geochemical and physical methods. The results of this study were used to evaluate the oil samples, focusing on the characteristics of their source rocks, including the origin of organic matter input; redox depositional conditions and degree of thermal maturity of their probable source rock were studied. The obtained SARA results show that the examined oils are paraffinic oils owing to their high saturated hydrocarbon fraction values of greater than 70% volume. The observed API gravity values (23.55° to 32.57°) and low sulfur content of less than 0.25% wt indicate that the examined oils are sweet oils and were generated from source rock containing Type-II, with low sulfur content. The low sulfur content combined with the vanadium (V) and nickel (Ni) ratios indicates that the examined oils were scoured from a mixture of aquatic and terrestrial organic matter, depositing under generally suboxic environmental conditions. The n-alkane and isoprenoid distributions, with their ratios and parameters further suggest that the examined oil samples were generated from source rock containing a mixed organic matter input and deposited under suboxic to relatively oxic environmental conditions. Bulk compositions and distributions of n-alkane and isoprenoid indicate that the oil samples were generated from mature source rock.

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Biomarker Characterization of Oil Seepages in Tomori Basin, Central Sulawesi, Indonesia

IOP Conference Series Earth and Environmental Science ◽

10.1088/1755-1315/921/1/012026 ◽

2021 ◽

Vol 921 (1) ◽

pp. 012026

Author(s):

M S Burhanuddin ◽

A Jaya ◽

A Maulana

Keyword(s):

Gas Chromatography ◽

Organic Matter ◽

Hypersaline Environment ◽

Terrestrial Organic Matter ◽

Anoxic Conditions ◽

Biomarker Analysis ◽

Oil Seepage ◽

Anoxic Environment ◽

Seepage Characteristics ◽

Organic Matter Input

Abstract Tomori Basin is located close to the Banggai Basin which has several productive oil fields. Further investigation of the hydrocarbon potential in Tomori Basin is an important issue as potential hydrocarbon resources are indicated by the discovery of several oil seepages in the area. This study identified Tomori Basin oil seepage characteristics using a biomarker analysis approach. The Wosu and Kolo Areas were the main objectives of this study. Oil seepage characteristics were determined using Gas Chromatography (GC) and Gas Chromatography-Mass Spectrometry (GC-MS) methods to generate biomarker data which could be analysed to identify organic matter origin, oxic and anoxic conditions, source facies, or depositional environment. Based on the GC analysis of is oprenoids, the Pristane C19/Phytane C20 ratio (Pr/Ph) of Wosu Oil was 0.75, indicating anoxic conditions typical of a hypersaline environment. Kolo Oil had a Pr/Ph ratio of 3.37 indicative of terrestrial organic input under oxic conditions. A cross plot between Pristane/nC17 and Pr/Ph ratios indicates that Wosu Oil derives from a highly anoxic environment with algae/bacterial organic matter input whereas Kolo Oil derives from a suboxic-oxic environment dominated by terrestrial organic matter input. Trycyclic terpene analysis from C19 to C25 shows Wosu Oil seepages tend to originate from an environment of mixed terrestrial and marine organic matter (transitional environment). Overall, biomarker characteristics indicate that Wosu Oil originated from organic matter in a hypersaline and anoxic environment, whereas Kolo Oil originated from terrestrial matter in a suboxic – oxic environment.

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