The relative role of lower and upper crustal processes in the formation of trace element compositions of oils

Родкин, М. В.; Рундквист, Д. В.; Пунанова, С. А.

doi:10.1134/s0016702916090068

Cited by 4 publications

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References 4 publications

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“…In other words, the geochemical specialization of oil is strongly influenced by the catalytic and/or solubilized metals that could be accumulated in the hydrocarbon systems. Noting the special features of petroleum in organic geochemistry, recently it was shown that geochemistry of crude oils could be dual-there are both traces of its deep origin and its interaction with sedimentary rocks [21,35].…”

Section: Inorganic Geochemistry Of Tatarstan Crude Oilsmentioning

confidence: 99%

“…Well-founded ideas are also developing [20,21] about several sources of trace elements in oils: inherited from biogenic matter, borrowed from oil-bearing sedimentary rocks, and stratal waters and introduced through permeable zones from deep parts of bark and possibly mantle. Thus, the complex of impurity elements present in crude oils and their resinous-asphaltene fractions is polygenic; in terms of REE, it is likely to be an indicator of the input of some part of the oil components from subcrustal horizons.…”

Section: Introductionmentioning

confidence: 99%

“…A statistical analysis of the values of the correlation between the microelement composition of caustobioliths (crudes, coals, combustible, and black shales) with the composition of the upper and lower continental crust and the living matter was carried out [21]. It is shown that the content of the trace element composition of coals and oil shale correlates better with the chemical composition of the upper crust, while the correlation of the concentration of trace element composition in oils is higher with the composition of the lower continental crust.…”

Section: Introductionmentioning

confidence: 99%

“…The calculation results also confirm the closeness of the trace element composition of oils within the same oil and gas basin and its difference in different basins. It has been shown that there are several "characteristic" elements (Cs, Rb, K, U, V, Cr, and Ni), the analysis of the concentration of which makes it possible to steadily assess the contribution of the influence of the upper and lower continental crust to the trace element composition of oils [21].…”

Section: Introductionmentioning

confidence: 99%

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Inorganic Geochemistry of Crude Oils of Northern Eurasia after ICP-MS Data as Clear Evidence for Their Deep Origin

2021

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The emergence of mass-spectroscopy with inductively-coupled plasma (ICP-MS) made it possible to study the microelement composition of crude oil and its derivatives with the limit of detection (LOD) at the ppt level. We have studied the crudes from West Siberian (Shaimsky, Sredneobsky and Oktyabrsky regions) and Tatarstan Romashinskoye oilfields with the ICP-MS method to detect 50 rare, rare-earth, and other microelements. The elemental composition is reasonably comparable to their concentrations in ultrabasites whereas the contents of most of the elements are low to the limit. On the diagrams of rare-earth elements, one can see the prevalence of light lanthanides and positive europium anomaly. Increased content of platinoids was found in Tatar oils; in some cases, the concentration of ruthenium reaches 0.06 g/t. The study shows that studied crudes have a specific microelement composition. Based on the elevated contents of transit elements and platinoids, a conclusion was made about the “ultrabasic” geochemical–metallogenic specialization of studied petroleum systems and the assumption about its origin was proposed.

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Section: Inorganic Geochemistry Of Tatarstan Crude Oilsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Inorganic Geochemistry of Crude Oils of Northern Eurasia after ICP-MS Data as Clear Evidence for Their Deep Origin

2021

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Correlation Analysis of the Trace Element Composition of Naphthides: Method, Results, and Interpretation

Родкин

Пунанова

2022

Izv. Atmos. Ocean. Phys.

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Comparison of the contribution of differently depth geological processes in the formation of a trace elements characteristic of caustobiolites

Пунанова

Родкин

2019

Georesursy

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The article analyzes the correlation dependences between the logarithms of the concentrations of trace elements (TE) in various geochemical environments (oil, coal, fuel and black shales, as well as in clays, organic matter (OM) of various types and biota) in comparison with the average chemical composition of the upper, middle and lower continental crust. At the same time, along with the TE content of oils of the main oil and gas basins (OGB) – the Volga-Ural and West Siberian ones, the data on the TE content in the so-called young oils were summarized; as such, data on the oil fields of the West Kamchatka oil and gas field and oil manifestations in the area of the caldera of the Uzon volcano were used. Particular attention was also paid to the results of the analysis of the TE composition of the oils of the Romashkino group of fields, as it is possible that they are subject to the influence of deep-seated processes. The correlation coefficients between the studied parameters for the various studied oil- and gas-generating basins, including for the Romashkino group of fields, turned out to be close. For all oils, except for the young oils of Kamchatka and the caldera of the Uzon volcano, a closer connection of their TE composition with the TE composition of the lower crust was revealed. For young oils of the Uzon caldera in Kamchatka, this trend is absent, and a slightly closer relationship is revealed with the average composition of the upper but not lower crust, while for statistically more reliable data on the TE composition of the hydrothermal waters of the caldera of the Uzon volcano, a significantly closer relationship is observed with the average chemical composition of the middle and upper crust. Based on the identified correlations between the TE compositions of oil, caustobioliths and the crust of different levels, conclusions are made about the likely relationship between biogenic and deep processes in the formation of oil and gas fields. According to the authors, the obtained results support the crucially important role in the processes of naphthidogenesis of the upward flows of the low crustal fluids with the dominant source of hydrocarbons from the initial OM of sedimentary basins.

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The relative role of lower and upper crustal processes in the formation of trace element compositions of oils

Cited by 4 publications

References 4 publications

Inorganic Geochemistry of Crude Oils of Northern Eurasia after ICP-MS Data as Clear Evidence for Their Deep Origin

Inorganic Geochemistry of Crude Oils of Northern Eurasia after ICP-MS Data as Clear Evidence for Their Deep Origin

Correlation Analysis of the Trace Element Composition of Naphthides: Method, Results, and Interpretation

Comparison of the contribution of differently depth geological processes in the formation of a trace elements characteristic of caustobiolites

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