Geochemical characteristic of the Lutetian black shale (Bayburt, NE-Turkey): amount, nature, origin of organic matter and palaeo-environment conditions DOI
Çiğdem Saydam Eker

Geological Magazine, Journal Year: 2024, Volume and Issue: 161

Published: Jan. 1, 2024

Abstract To define the amount, thermal maturity and type of organic matter (OM), a comprehensive analysis major trace elements, carbon isotope geochemistry was conducted on Lutetian black shales found in Everek (Bayburt) region northeastern Turkey. Total (TOC) levels shale samples range from 0.62% to 6.75%, II–III III kerogen is generated, displaying combination high terrigenous low marine OM. The δ 13 C values (ranging –28.22‰ –28.23‰), aromatic hydrocarbon compounds (methyl phenanthrene, dibenzothiophene, tri-aromatic monoaromatic steroids), saturated (sterane terpane), acyclic isoprenoids, n-alkane distribution (n-C –n-C 36 ) inorganic geochemical characterization support that were deposited terrestrial-marine transition environment had proportion terrestrial OM with small amounts preserved relatively arid hot climate oxic suboxic conditions. biomarker markers, T max 449–458 o C) estimated vitrinite reflectance (varying 0.92 1.08%) suggest have reached oil window. As result, are thought contain TOC, mixed type, reach level produce little hydrocarbons.

Language: Английский

Organic Matter Accumulation Model of Jurassic Lianggaoshan Shale Under Lake-Level Variations in Sichuan Basin: Insights from Environmental Conditions DOI Open Access
Dong Huang, Ming‐Hui Qi,

Xiang Deng

et al.

Minerals, Journal Year: 2025, Volume and Issue: 15(2), P. 159 - 159

Published: Feb. 9, 2025

Organic matter (OM) is the primary carrier for generation and occurrence of shale oil gas. The combination sequence stratigraphy elemental geochemistry plays a crucial role in study organic enrichment mechanisms marine shale, but it rarely applied to terrestrial lacustrine basins. As product last large-scale lake transgression Sichuan Basin, Early Jurassic Lianggaoshan Formation (LGS Fm.) developed multiple organic-rich intervals, which good example studying OM Based on high-resolution stratigraphic framework, evolutionary process debris input, redox conditions, paleo-productivity during sedimentary period at different stages lake-level variations has been revealed. main controlling factors establishment their patterns have determined. Sequence studies shown that there are three third-order transgression-lake regression (T-R) cycles LGS Formation. total carbon content (TOC) higher TST cycle, especially T-R3 lower RST cycle. There differences paleo-productivity, detrital transport, accumulation under influence deposition system tracts. results indicate changes level significant impact reducibility bottom water surface seawater, relatively small input debris. In gradually increases, while opposite true. Within mainly influenced by condition water, with moderate playing positive role. inducing factor enrichment, followed flux diluting role, generally not conducive accumulation.

Language: Английский

Citations

0
Provenance, weathering, and metallogenic characteristics of lateritic soils in the Koubou district, Eastern Cameroon DOI
Amaya Adama,

Bisse Salomon Bertrant,

Bokanda Ekoko Eric

et al.

Arabian Journal of Geosciences, Journal Year: 2025, Volume and Issue: 18(4)

Published: March 15, 2025

Language: Английский

Citations

0
Geochemical and mineralogical characteristics of shales from the early to middle Permian Dohol Formation in Peninsular Malaysia: Implications for organic matter enrichment, provenance, tectonic setting, palaeoweathering and paleoclimate DOI Creative Commons
Alidu Rashid, Numair Ahmed Siddiqui, Nisar Ahmed

et al.

Heliyon, Journal Year: 2024, Volume and Issue: 10(6), P. e27553 - e27553

Published: March 1, 2024

The early to middle Permian Dohol Formation is characterized by a significant presence of shale deposits. While these shales exhibit low potential generate hydrocarbons, there need ascertain the possible reasons for hydrocarbon generation potential. Also, are several unidentified properties and attributes associated with in terms their inorganic geochemical characteristics mineralogy. This study focused on using XRF, ICPMS, SEM EDX determine mineralogical aspects use data discuss provenance history tectonic setting interpret paleoclimatic paleoweathering conditions. analysis shows that from felsic igneous source. were also identified be passive margin based bivariate plot SiO2 vs log (K2O/Na2O) multidimensional diagram plots. CIA CIW data, as well A–CN–K plot, all point degree chemical weathering, ranging mild intense. Sr/Cu ratio C-value, combined various other proxies, indicate formed warm-humid climatic samples mainly composed kaolinite illite, this result was supported elemental composition.The high terrigenous influx sediments, oxic sub-oxic conditions which sediments deposited, marine productivity, finally tectonically active depositional environment found TOC mature organic matter Formation.

Language: Английский

Citations

3
Tracking environmental changes in an Early Cretaceous epicontinental sea: sedimentology and geochemistry of the Romualdo Formation (Araripe Basin, NE Brazil) DOI
Laís de Oliveira Ferreira, Victor Eletherio Chagas,

Fabia Emanuela Rafaloski Bobco

et al.

Cretaceous Research, Journal Year: 2024, Volume and Issue: 166, P. 105986 - 105986

Published: Aug. 25, 2024

Language: Английский

Citations

2
Geochemical constrains for unravelling the condition of sedimentation, provenance, paleoclimate variation, and metallogenic implication of the cretaceous deposits of Mayo Oulo Basin (North Cameroon, Africa) DOI Creative Commons

Jeannette Ngo Elogan Ntem,

Vannelle Ngounfack Tiokeng,

René Toyama

et al.

Solid Earth Sciences, Journal Year: 2024, Volume and Issue: 9(3), P. 100188 - 100188

Published: June 11, 2024

Language: Английский

Citations

1
Geochemical constraints for unravelling the conditions of sedimentation, Paleoclimate variations, and provenance and metallogenic implication of the Cretaceous sequence deposits along the Mayo Louti, Babouri-Figuil Basin (North Cameroon, Africa) DOI

Justeol Pholker Takou,

Christel Sobdjou-Kemteu,

Milan Stafford Tchouatcha

et al.

Arabian Journal of Geosciences, Journal Year: 2024, Volume and Issue: 17(10)

Published: Sept. 24, 2024

Language: Английский

Citations

0
Geochemical characteristic of the Lutetian black shale (Bayburt, NE-Turkey): amount, nature, origin of organic matter and palaeo-environment conditions DOI
Çiğdem Saydam Eker

Geological Magazine, Journal Year: 2024, Volume and Issue: 161

Published: Jan. 1, 2024

Abstract To define the amount, thermal maturity and type of organic matter (OM), a comprehensive analysis major trace elements, carbon isotope geochemistry was conducted on Lutetian black shales found in Everek (Bayburt) region northeastern Turkey. Total (TOC) levels shale samples range from 0.62% to 6.75%, II–III III kerogen is generated, displaying combination high terrigenous low marine OM. The δ 13 C values (ranging –28.22‰ –28.23‰), aromatic hydrocarbon compounds (methyl phenanthrene, dibenzothiophene, tri-aromatic monoaromatic steroids), saturated (sterane terpane), acyclic isoprenoids, n-alkane distribution (n-C –n-C 36 ) inorganic geochemical characterization support that were deposited terrestrial-marine transition environment had proportion terrestrial OM with small amounts preserved relatively arid hot climate oxic suboxic conditions. biomarker markers, T max 449–458 o C) estimated vitrinite reflectance (varying 0.92 1.08%) suggest have reached oil window. As result, are thought contain TOC, mixed type, reach level produce little hydrocarbons.

Language: Английский

Citations

0