Carbon Sources and the Graphitization of Carbonaceous Matter in Precambrian Rocks of the Keivy Terrane (Kola Peninsula, Russia)

Fomina, Ekaterina; Kozlov, Evgeniy; Lokhov, K. I.; Lokhova, O. V.; Bocharov, Vladimir N.

doi:10.3390/min9020094

Cited by 10 publications

(5 citation statements)

References 57 publications

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“…Based on previously established correlations of Rr, Rmax, G‐band width, and peak temperature (Goodarzi and Murchison 1972; Barker and Pawlewicz 1994; Beyssac et al 2002; Fomina et al 2019; Korsakov et al 2019), and using Equations and , we derived two exponential correlations between temperature and G‐band width.…”

Section: Resultsmentioning

confidence: 99%

“…The first correlation (Equation ) that can be applied to long heating events with a duration of 10 kyr up to 25 Myr, is based on data from (1) Barker and Pawlewicz (1994), who studied burial heating between 50 °C and 220 °C, and ore deposits and active natural geothermal plants, encompassing temperature ranges from 100 °C to 350 °C, with event durations between 10 kyr and 1 Myr (Barker 1983; Barker and Goldstein 1990); (2) Beyssac et al (2002), who studied metasedimentary rocks in metamorphic belts encompassing temperature ranges from 300 °C to 600 °C, between 0.3 GPa and 3.2 GPa, with event durations between 10 and 25 Myr; (3) Fomina et al (2019), who studied CM graphitization in metamorphic terranes, from 400 °C to 600 °C at 0.4 GPa to 0.65 GPa; and (4) Korsakov et al (2019), who studied natural graphite cuboids in metamorphic terranes; only their data with 600 °C at 1.5–1.7 GPa were considered for this equation.

T_{italicgeol} (x) = A e^{- x / β}

where x = G FWHM ; A = 983.41; β = 37.04 cm ‐1 ; R 2 = 0.92; T [60–650 °C]; G FWHM [16–92 cm ‐1 ]; n = 160.…”

Section: Resultsmentioning

confidence: 99%

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Evaluation of terrestrial carbonaceous matter aromatization by Raman spectroscopy and its application to C chondrites

Schmidt

Hinrichs

2020

Meteorit & Planetary Scien

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A Raman method to estimate the aromatization degree of carbonaceous matter (CM) was established, and calibrated by literature data respecting differences in acquisition procedures. The generated equations allowed a comparison of the G-band width to vitrinite reflectance, and to additional structural organization parameter extracted from X-ray powder diffraction. The relations between aromatization degree and peak temperatures from literature were then propagated to G-band width parameter. The applicability of these geothermometers is demonstrated by the consistency of data obtained for carbonaceous chondrites with previous estimations. Since the CM aromatization is controlled by peak temperature and time span, it is possible to estimate the duration of chondrite's heating events. The G-band width relation to elemental ratio trends of organic matter in chondrites, interplanetary dust particles, glucose, and saccharose-based semi-coke favors synthesis by formose route. These findings provide new approaches for the future development of chemical kinetic models for organic matter of chondrites. A reliable chemical model may allow the external calibration of numerical models for accurately evaluating the peak temperatures and cooling durations of chondrites.

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Section: Resultsmentioning

confidence: 99%

T_{italicgeol} (x) = A e^{- x / β}

where x = G FWHM ; A = 983.41; β = 37.04 cm ‐1 ; R 2 = 0.92; T [60–650 °C]; G FWHM [16–92 cm ‐1 ]; n = 160.…”

Section: Resultsmentioning

confidence: 99%

Evaluation of terrestrial carbonaceous matter aromatization by Raman spectroscopy and its application to C chondrites

Schmidt

Hinrichs

2020

Meteorit & Planetary Scien

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“…C-3(b), observed in S-2(3), and S-3(3) represents graphitized carbon marked by high C/N and slightly enriched δ 13 C (as compared to δ 13 C organic ). An enrichment of δ 13 C during graphitization of carbonaceous matter occurs as 12 C-13 C bonds in C-complexes are broken with increasing thermal stress (Fomina et al, 2019). Although C-3(b) is a very small fraction of the total OC present in shale, its survival during combustion at temperature > 1000 • C, imply that it can be preserved even in the hottest subduction zones.…”

Section: >800 • Cmentioning

confidence: 99%

Stability of Organic Carbon Components in Shale: Implications for Carbon Cycle

et al. 2019

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Stability and mobility of organic matter in shale is significant from the perspective of carbon cycle. Shale can only be an effective sink provided that the organic carbon present is stable and immobile from the host sites and, not released easily during geological processes such as low pressure-temperature burial diagenesis and higher pressure-temperature subduction. To examine this, three Jurassic shale samples of known mineralogy and total organic carbon content, with dominantly continental source of organic matter, belonging to the Haynesville-Bossier Formation were combusted by incremental heating from temperature of 200 to 1400 • C. The samples were analyzed for their carbon and nitrogen release profiles, bulk δ 13 C composition and C/N atomic ratio, based on which, at least four organic carbon components are identified associated with different minerals such as clay, carbonate, and silicate. They have different stability depending on their host sites and occurrences relative to the mineral phases and consequently, released at different temperature during combustion. The components identified are denoted as, C-1 (organic carbon occurring as free accumulates at the edge or mouth of pore spaces), C-2 (associated with clay minerals, adsorbed or as organomineral nanocomposites; with carbonate minerals, biomineralized and/or occluded), C-3(a) (occurring with silicate minerals, biomineralized and/or occluded) and C-3(b) (graphitized carbon). They show an increasing stability and decreasing mobility from C-1 to C-3(b). Based on the stability of the different OC components, shale is clearly an efficient sink for the long term C cycle as, except for C-1 which forms a very small fraction of the total and is released at temperature of ∼200 • C, OC can be efficiently locked in shale surviving conditions of burial diagenesis and, subduction at fore arc regions in absence of infiltrating fluids. Under low fluid flux, C-3(b) can be efficiently retained as a refractory phase in the mantle when subducted. It is evident that the association and interaction of the organic matter with the different minerals play an important role in its retention in the shale.

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“…The available data are indicative of their discontinuous accumulation in the cratonization regime. This development of Keivy is indicated by data on the extensive formation of anomalously light carbon within this structure [54].…”

Section: Geodynamicsmentioning

confidence: 70%

The Keivy Domain of the Kola Granulite–Gneiss Area on the Baltic Shield: Most Ancient Median Massif of the Continental Crust

et al. 2023

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Studies of lithotectonic formations within the Keivy domain of the NE Baltic Shield have shown that the domain was tectonically overlapped by adjacent microcontinents during regional collision processes in the Late Archean. As a consequence, the continental crust of the Keivy domain was submerged, relative to other blocks of the continental crust, and the described domain acquired the features of a classical median massif. Surrounded on all sides by collision systems, the Keivy median massif entered the cratonization regime. This led to intensive processes of denudation of the surrounding domains of the crust and the accumulation of a thick sedimentary cover on the surface. The described processes occurred during the formation of the first supercontinent (Monogea) in the history of the Earth and the manifestation of the Early Precambrian Huronian glaciation, which left its traces on most domains of the Earth’s continental crust. Thus, the processes of peneplain formation within the Keivy massif occurred under the cold weather conditions, high volcanic activity in the peripheral zones, and sedimentary cover saturation with the products of the physical and chemical mineral transformation of tonalite–trondhjemite and greenstone rock assemblages. The unique combination of certain geodynamic and climatic cycles on the Baltic Shield in the Late Archean led to the accumulation of extensive stratiform deposits of alumina raw materials within the Keivy median massif.

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Carbon Sources and the Graphitization of Carbonaceous Matter in Precambrian Rocks of the Keivy Terrane (Kola Peninsula, Russia)

Cited by 10 publications

References 57 publications

Evaluation of terrestrial carbonaceous matter aromatization by Raman spectroscopy and its application to C chondrites

Evaluation of terrestrial carbonaceous matter aromatization by Raman spectroscopy and its application to C chondrites

Stability of Organic Carbon Components in Shale: Implications for Carbon Cycle

The Keivy Domain of the Kola Granulite–Gneiss Area on the Baltic Shield: Most Ancient Median Massif of the Continental Crust

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