Interpreting Rock–Eval pyrolysis data using graphs of S2 vs. TOC: Middle Triassic–Lower Jurassic units, eastern part of SE Turkey

Multidisciplinary analysis of the carbonaceous sediments of Warkalli Formation (Mio-Pliocene) from the Warkalli cliff section has been done to assess the source of organic matter, palaeo-depositional settings and the hydrocarbon potential. The n-alkane distribution from n-C12 to n-C33 along with bimodal distribution indicates significant organic matter contribution from microbial activity and higher plants. The contribution from angiosperm source vegetation is indicated by the oleanane type of triterpenoids. The hopanes distribution indicates the immature stage of the organic matter, which is in agreement with the Tmax (av. 401 °C) and huminite reflectance (av. 0.28% Rr) values. The total organic carbon (TOC) contents vary between 0.8 and 6.72 wt. % in the studied sediments. Hydrogen index and oxygen index values range from 16 to106 mg HC/g TOC, and 113 to 344 mg CO2/g TOC, respectively. The maceral content is low, being dominated by the detrohuminite submaceral and the mineral matter accounts for 68 to 77% of the total composition. The phytoclast group (63-87%) is dominant with subordinate amorphous organic matter (4-35%). The study shows that the sediments were deposited in a marginal suboxic basin with intermittent variations. All the parameters unequivocally suggest that the studied sequence holds the potential to generate gaseous hydrocarbons.

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Evaluation of Organic Matter, Hydrocarbon Source, and Depositional Environment of Onshore Warkalli Sedimentary Sequence from Kerala-Konkan Basin, South India

Mathews

Singh

2018

Journal of the Geological Society of India

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Revelation of organic matter sources and sedimentary environment characteristics for shale gas formation by petrographic analysis of middle Jurassic Dameigou formation, northern Qaidam Basin, China

Qin

Wang²,

Sanei

et al. 2018

International Journal of Coal Geology

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The influence of Early Cretaceous paleoclimate warming event on sedimentary environment evolution and organic matter sources in Yin'e Basin: Evidence from petrology and molecular geochemistry

Zhang

Liu

Ding

et al. 2022

International Journal of Coal Geology

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Interpreting Rock–Eval pyrolysis data using graphs of S2 vs. TOC: Middle Triassic–Lower Jurassic units, eastern part of SE Turkey

Cited by 11 publications

References 10 publications

Evaluation of Organic Matter, Hydrocarbon Source, and Depositional Environment of Onshore Warkalli Sedimentary Sequence from Kerala-Konkan Basin, South India

Evaluation of Organic Matter, Hydrocarbon Source, and Depositional Environment of Onshore Warkalli Sedimentary Sequence from Kerala-Konkan Basin, South India

Revelation of organic matter sources and sedimentary environment characteristics for shale gas formation by petrographic analysis of middle Jurassic Dameigou formation, northern Qaidam Basin, China

The influence of Early Cretaceous paleoclimate warming event on sedimentary environment evolution and organic matter sources in Yin'e Basin: Evidence from petrology and molecular geochemistry

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