The genesis of calcite in carbonate rocks of the sedimentary basins: Evidence from the stable carbon and oxygen isotopes composition

Yurchenko, A. Yu.

doi:10.3103/s0145875214050135

Cited by 3 publications

(7 citation statements)

References 3 publications

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“…The diagram presents the data on carbon and oxygen isotope composition of the studied samples as well as the published data on isotope composition of carbonates from the Bazhenov Formation and the upper part of underlying Abalak Formation in the central part of the West Siberian petroleum basin. Group I shown in the diagram includes points with values of 0 ± 4‰VPDB for both δ 13 С and δ 18 О, corresponding to primary biogenic limestones or shell remains [47], which is also consistent with the data reported in [18][19][20][21]. Not a single sample from the studied sections fell into Group I.…”

Section: Resultssupporting

confidence: 88%

“…Secondary carbonates of group III are common for the Bazhenov Formation and are also characteristic for calcite veins in limestones in the upper part of the Abalak Formation [7,38,47]. Group I shown in the diagram includes points with values of 0 ± 4‰VPDB for both δ 13 C and δ 18 O, corresponding to primary biogenic limestones or shell remains [47], which is also consistent with the data reported in [18][19][20][21]. Not a single sample from the studied sections fell into Group I.…”

Section: Resultsmentioning

confidence: 99%

“…Group II includes points with δ 13 C values less than −15‰VPDB and δ 18 O values above −5‰VPDB. According to [7,47], this group corresponds to sedimentary-diagenetic methane-derived limestones. These carbonates are formed on the seabed in the areas of focused methane discharge, when methane reaching the seafloor surface is oxidized by microorganisms under anaerobic conditions.…”

Section: Resultsmentioning

confidence: 99%

“…These carbonates are formed on the seabed in the areas of focused methane discharge, when methane reaching the seafloor surface is oxidized by microorganisms under anaerobic conditions. Due to bacterial reworking of the isotopically light methane, the carbon dioxide and carbonates which are formed with participation of this carbon dioxide are considerably depleted in 13 C [47][48][49][50][51][52]. Since the process generally occurs in the upper part of marine sediments, δ 18 O of methane-derived carbonates is close to normal marine biogenic ones.…”

Section: Resultsmentioning

confidence: 99%

“…A significant shift in the carbon and oxygen isotope composition towards smaller values for the samples of group III is associated with their formation or recrystallization under conditions of elevated temperatures in the presence of formation water of marine genesis, as well as isotopically light carbon dioxide formed during the OM and HC transformation in catagenesis. Secondary carbonates of group III are common for the Bazhenov Formation and are also characteristic for calcite veins in limestones in the upper part of the Abalak Formation [7,38,47].…”

Section: Resultsmentioning

confidence: 99%

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Application of the Data on δ13C and δ18O of Carbonates for the Study of Unconventional Reservoirs on the Example of the Bazhenov Source Rocks, Western Siberia, Russia

et al. 2021

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This paper addresses potential application of data on stable carbon and oxygen isotope composition of carbonates for study of organic rich source rocks on the example of the Late Jurassic–Early Cretaceous Bazhenov Formation (West Siberian petroleum basin, Russia). Geochemical studies were conducted for sections located in central (most productive) and peripheral (northern and southern) regions of the Bazhenov Formation distribution area, containing deposits formed under different conditions. We identified key factors impacting stable isotope composition of carbonate minerals and established relation of their isotope composition to the formation conditions. Using a thermodynamic model of carbon and oxygen isotope exchange in the carbonate–water–carbon dioxide system, it is shown that variations in the isotope composition of secondary carbonates are affected by isotopic composition of primary carbonates in sediments and by the isotope exchange reactions with water and carbon dioxide, generated during the source rocks transformation. Our results demonstrate that stable isotope data for carbonates in the Bazhenov Formation together with standard geochemical methods can be efficiently applied to determine sedimentation conditions and secondary alteration processes of oil source rocks.

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Section: Resultssupporting

confidence: 88%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

See 3 more Smart Citations

Application of the Data on δ13C and δ18O of Carbonates for the Study of Unconventional Reservoirs on the Example of the Bazhenov Source Rocks, Western Siberia, Russia

et al. 2021

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A Mississippian black shale record of redox oscillation in the Craven Basin, UK

Emmings

Poulton

Vane

et al. 2020

Palaeogeography, Palaeoclimatology, Palaeoecology

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Upper Jurassic–Lower Cretaceous Source Rocks in the North of Western Siberia: Comprehensive Geochemical Characterization and Reconstruction of Paleo-Sedimentation Conditions

et al. 2021

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The present work is devoted to geochemical studies of the Bazhenov Formation in the north of the West Siberian Petroleum Basin. The object is the Upper Jurassic–Lower Cretaceous section, characterized by significant variations in total organic carbon content and petroleum generation potential of organic matter at the beginning of the oil window. The manuscript presents the integration of isotopic and geochemical analyses aimed at the evaluation of the genesis of the rocks in the peripheral part of the Bazhenov Sea and reconstruction of paleoenvironments that controlled the accumulation of organic matter in sediments, its composition and diagenetic alterations. According to the obtained data, the sediments were accumulated under marine conditions with a generally moderate and periodically increasing terrigenous influx. The variations in organic matter composition are determined by redox conditions and terrigenous input which correlate with the eustatic sea level changes during transgressive/regressive cycles and activation of currents. Transgression is associated with an intensive accumulation of organic matter under anoxic to euxinic conditions and insignificant influence of terrigenous sources, resulting in the formation of rocks with oil-generating properties. During the regression periods, the terrigenous sedimentation increased along with the dissolved oxygen concentration, and deposits with low organic matter content and gas-generating properties were formed.

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The genesis of calcite in carbonate rocks of the sedimentary basins: Evidence from the stable carbon and oxygen isotopes composition

Cited by 3 publications

References 3 publications

Application of the Data on δ13C and δ18O of Carbonates for the Study of Unconventional Reservoirs on the Example of the Bazhenov Source Rocks, Western Siberia, Russia

Application of the Data on δ13C and δ18O of Carbonates for the Study of Unconventional Reservoirs on the Example of the Bazhenov Source Rocks, Western Siberia, Russia

A Mississippian black shale record of redox oscillation in the Craven Basin, UK

Upper Jurassic–Lower Cretaceous Source Rocks in the North of Western Siberia: Comprehensive Geochemical Characterization and Reconstruction of Paleo-Sedimentation Conditions

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