Stable isotopes of organic carbon, palynology, and petrography of a thick low-rank Miocene coal within the Mile Basin, Yunnan Province, China: implications for palaeoclimate and sedimentary conditions

Liu, Jingjing; Dai, Shifeng; Hower, James C.; Moore, Tim A.; Moroeng, Ofentse M.; Nechaev, Victor P.; Petrenko, T.I.; French, David; Graham, Ian T.; Song, Xiaolin

doi:10.1016/j.orggeochem.2020.104103

Cited by 21 publications

(5 citation statements)

References 81 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Using a stable isotope of carbon as a determinant of sediment settings and paleoclimate is hard to decrypt. δ 13 C variability is predominant than observed between macerals of the exact succession; as such, these differences are not from changes in organic matter composition only (Jingjing et al 2020). A good correlation of maceral indices exists between δ 13 C and the vegetation index.…”

Section: Paleovegetation and Paleoclimatic Evolutionmentioning

confidence: 79%

See 1 more Smart Citation

Biomarkers, stable carbon isotope, and trace element distribution of source rocks in the Orange Basin, South Africa: implications for paleoenvironmental reconstruction, provenance, and tectonic setting

Yelwa

Mustapha

Opuwari

et al. 2021

J Petrol Explor Prod Technol

View full text Add to dashboard Cite

Aptian to Campanian sediments from the Western offshore to Central Orange Basin were studied by integrating molecular geochemistry, inorganic and isotopic studies to recognize their geochemical characteristics via the reconstruction of the Orange basin’s paleoweathering, paleosalinity, paleovegetation, paleoclimate, and tectonic records. Molecular analyses of both aliphatic and aromatic compounds reveal an input dominantly from a marine source. The source rocks accumulated in a reduced, anoxic, saline water column. Based on various biomarker proxies and vitrinite reflectance data, some samples are thermally mature to produce petroleum, while others are not. According to the V/Ni ratio, samples from the Orange Basin in South Africa are mainly anoxic, with only a few samples ranging from suboxic to anoxic. This is congruent with biomarker and isotope analyses that further indicate the presence of marine-derived source rocks with some terrestrial remains generating hydrocarbons. The investigated sediments are made up of intermediate igneous rocks that have undergone moderate chemical weathering. Geochemical figures on tectonic setting discriminant function diagrams revealed a continental rift of passive margin settings. As a result, the extrapolated crustal processes are directly analogous to the genesis and evolution of the Orange Basin, demonstrating Gondwana’s breaking up and the opening of the Atlantic Ocean Margin.

show abstract

Section: Paleovegetation and Paleoclimatic Evolutionmentioning

confidence: 79%

“…8b). Higher VI connotes woody vegetation, favoring drier and shallow water table (Calder et al 1991;Calder 1993;Jingjing et al 2020). Low VI, on the other hand, may indicate a wetter environment, resulting in larger, more microbially diverse herbaceous plants.…”

Section: Paleovegetation and Paleoclimatic Evolutionmentioning

confidence: 99%

Biomarkers, stable carbon isotope, and trace element distribution of source rocks in the Orange Basin, South Africa: implications for paleoenvironmental reconstruction, provenance, and tectonic setting

Yelwa

Mustapha

Opuwari

et al. 2021

J Petrol Explor Prod Technol

View full text Add to dashboard Cite

show abstract

“…However, due to the complex processes during the peat formation, assessing the environmental settings only through maceral ratios might introduce inadequate results. Therefore, additional information from organic and inorganic geochemical, mineralogical, and sedimentological data should also be considered. − …”

Section: Results and Discussionmentioning

confidence: 99%

Maceral and Organic Geochemical Characteristics of the Late Permian Coals from Yueliangtian Mine, Guizhou, Southwestern China

Qin

et al. 2021

ACS Omega

View full text Add to dashboard Cite

Compositional characteristics of maceral and extractable organic matter (EOM) of the No. 10 coal from the Yueliangtian mine, Guizhou, Southwestern China, were analyzed by optical microscopy, gas chromatography (GC), and gas chromatography-mass spectrometry (GC-MS). The depositional conditions, thermodynamic effect, type and maturity of organic matter, and possible health hazards were evaluated. The random vitrinite reflectance (R o ) is 1.01%, and the macerals are dominated by collodetrinite, inertodetrinite, collotelinite, and fusinite. The coal seam is a terrestrial sedimentary environment of the lower delta plain through the analysis of coal facies. Additionally, the extracted yield of EOM is 1.01%. The low ratio of saturated to aromatic fraction and the distribution of n-alkanes indicate that the coal-forming plants are primarily terrestrial higher plants. Typical isoprenoid biomarker parameters, including pristane/phytane (Pr/ Ph), Pr/n-C 17 , and Ph/n-C 18 , reflect a weak oxidizing environment of coal. The hopanoid biomarkers, odd−even predominance index (OEP), and carbon preference index (CPI) reveal that the organic matter was mature. More than one hundred polycyclic aromatic compounds (PACs) were eluted and identified, and the phenanthrenes and naphthalenes account for a higher proportion. Thermodynamic stabilities play an essential role in the conversion of molecular structures, which support the relatively high contents of 2-methylnaphthalene, 2-and 3-methylphenanthrenes, and 2,6-and 2,7-dimethylphenanthrenes compared to their respective isomers. The oxygen-containing and sulfur-containing aromatic compounds also indicate the weak oxidization of the coal-formation environment, which is consistent with the results of isoprenoid biomarkers. Because of the carcinogenicity and mutagenicity of PACs, the distribution and toxic equivalency of PACs are briefly summarized.

show abstract

“…Peat accumulation often occurs in a certain evolution stage and specific part of the sedimentary basin and shows a certain regularity in time and space [9,12,42]. Usually, factors such as paleotectonic, paleogeography, paleoclimate and the peat-forming plants all have certain influences on peat accumulation [1,2,5,43,44]. Nevertheless, in this study, we only focused on the control of sedimentation on the accumulation of the No.…”

Section: Peat-accumulating Regularity Of Main Coal Seamsmentioning

confidence: 99%

Seismic-Geological Integrated Study on Sedimentary Evolution and Peat Accumulation Regularity of the Shanxi Formation in Xinjing Mining Area, Qinshui Basin

et al. 2022

View full text Add to dashboard Cite

Accurate identification of the lithofacies and sedimentary facies of coal-bearing series is significant in the study of peat accumulation, coal thickness variation and coal-measured unconventional gas. This research integrated core, logging and 3D seismic data to conduct a comprehensive seismic–geological study on the sedimentary evolution characteristics and peat accumulation regularity of the Shanxi Formation in the Xinjing mining area of the Qinshui Basin. Firstly, the high-resolution sequence interface was identified, and the isochronous stratigraphic framework of the coal-bearing series was constructed. Then, the temporal and spatial evolution of sedimentary filling and sedimentary facies was dynamically analyzed using waveform clustering, phase rotation, stratal slice and frequency–division amplitude fusion methods. The results show that the Shanxi Formation in the study area can be divided into one third-order sequence and two fourth-order sequences. It developed a river-dominated deltaic system, mainly with delta plain deposits, and underwent a constructive–abandoned–constructive development stage. The locally distributed No. 6 coal seam was formed in a backswamp environment with distribution constrained by the distributary channels. The delta was abandoned at the later stage of the SS1 sequence, and the peat accumulation rate was balanced with the growth rate of the accommodation, forming a large-area distributed No. 3 thick coal seam. During the formation of the SS2 sequence, the No. 3 coal seam was locally thinned by epigenetic erosion of the river, and the thin coal belt caused by erosion is controlled by the location of the distributary channels and their extension direction. This study can provide a reference for the research on the distribution of thin sand bodies, sedimentary evolution and peat accumulation regularity in the coal-bearing series under the marine–continental transitional environment.

show abstract

Stable isotopes of organic carbon, palynology, and petrography of a thick low-rank Miocene coal within the Mile Basin, Yunnan Province, China: implications for palaeoclimate and sedimentary conditions

Cited by 21 publications

References 81 publications

Biomarkers, stable carbon isotope, and trace element distribution of source rocks in the Orange Basin, South Africa: implications for paleoenvironmental reconstruction, provenance, and tectonic setting

Biomarkers, stable carbon isotope, and trace element distribution of source rocks in the Orange Basin, South Africa: implications for paleoenvironmental reconstruction, provenance, and tectonic setting

Maceral and Organic Geochemical Characteristics of the Late Permian Coals from Yueliangtian Mine, Guizhou, Southwestern China

Seismic-Geological Integrated Study on Sedimentary Evolution and Peat Accumulation Regularity of the Shanxi Formation in Xinjing Mining Area, Qinshui Basin

Contact Info

Product

Resources

About