Coal deposition in the Barito Basin (Southeast Borneo): The Eocene Tanjung Formation compared to the Miocene Warukin Formation

Fikri, Hafidz Noor; Sachsenhofer, Reinhard; Bechtel, Achim; Groß, Doris

doi:10.1016/j.coal.2022.104117

Cited by 12 publications

(4 citation statements)

References 65 publications

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“…This interpretation is corroborated by the observed absence of non-coal epiclastic partings in the seams (Sia and Abdullah 2012). However, given the established dry-seasonal tropical climate in the Late Pliocene, the Balingian paleopeats possibly originated in rheotrophic mires that were protected from detrital inputs (Cecil et al 1985;Fikri et al 2022). This theory is supported by the TOC and S T contents, which suggest that the Balingian paleopeats developed within ombrogenous to topogenous mire facies (Fig.…”

Section: Paleosalinity and Marine Influencementioning

confidence: 70%

Geochemistry of Cenozoic coals from Sarawak Basin, Malaysia: implications for paleoclimate, depositional conditions, and controls on petroleum potential

Asiwaju,

Mustapha,

Abdullah

et al. 2024

Int J Coal Sci Technol

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Forty Tertiary coals from Mukah-Balingian and Merit-Pila coalfields of the Sarawak Basin, Malaysia were investigated using bulk and molecular geochemical techniques such as proximate analysis, gas chromatography-mass spectrometry, elemental analyser, isotope ratio mass spectrometry, and inductively coupled plasma mass spectrometry to reconstruct their paleovegetation, paleoclimate, and environments of deposition. In addition, principal component analysis (PCA) of selected geochemical parameters was carried out to determine the controlling influences on the petroleum potential of the humic coals. δ13C values and the abundance of terpenoids imply the predominant contribution of angiosperms to the paleoflora. Bimetal proxies (Sr/Ba, Sr/Cu, and C-value), and δD values are generally suggestive of a warm and humid climate during the accumulation of the paleopeats. However, n-alkane proxies (Pwax, Paq, n-C23/n-C29, etc.) and polycyclic aromatic hydrocarbons (PAHs) distribution suggest that Balingian coals accumulated under relatively drier and strongly seasonal paleoclimate in the Late Pliocene. When compared with published global average abundances, the investigated coals are mostly depleted in major oxides and trace elements, suggesting peat accumulation in freshwater-influenced environments. Nonetheless, higher (> 0.5 wt%) total sulfur content in some Mukah-Balingian coals suggests some degree of epigenetic marine influence. Furthermore, the low to moderately-high ash contents of the Sarawak Basin coals indicate the presence of ombrotrophic and rheotrophic peat deposits. PCA result of selected geochemical proxies suggests that source input, paleoflora, and marine incursions are not major controlling influences on the petroleum potential. However, climatic, and depositional conditions appear to slightly influence the petroleum potential of the studied humic coals.

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Section: Paleosalinity and Marine Influencementioning

confidence: 70%

Geochemistry of Cenozoic coals from Sarawak Basin, Malaysia: implications for paleoclimate, depositional conditions, and controls on petroleum potential

Asiwaju,

Mustapha,

Abdullah

et al. 2024

Int J Coal Sci Technol

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“…In terms of sulfur, both the Datanhao and Adaohai coals are low-sulfur coals. , Sulfur in low-sulfur coal, as reported by Chou and Dai et al, was derived primarily from parent plant materials, and in most cases, low-sulfur coals formed in nonmarine influenced environments. − Sulfur in such low-sulfur coals has a very little effect on both abundance and modes of occurrence of other elements in coal, − different from that in high-sulfur coals (total sulfur higher than 3%). − Therefore, the impact of sulfur on the modes of occurrence of trace elements in Datanhao and Adaohai coals is not significant.…”

Section: Results and Discussionmentioning

confidence: 93%

Advocating the Use of Bayesian Network in Analyzing the Modes of Occurrence of Elements in Coal

Xu,

Li,

Zhu

et al. 2023

ACS Omega

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Modes of occurrence of elements in coal are important because they can be used not only to understand the origin of inorganic components in coal but also to determine the impact on the environment and human health and the deposition process of coal seams as well. Statistical analysis is one of the commonly used indirect methods used to analyze the modes of occurrence of elements in coal, among which hierarchical clustering is widely used. However, hierarchical clustering may lead to misleading results due to its limitation that it focuses on the clusters of elements rather than a single element. To tackle this issue, we use the first part of a well-known Bayesian network structure learning algorithm, i.e., Peter−Clark (PC) algorithm, to explore the relationships of the coal elemental data and then infer modes of occurrence of elements in coal. A data set containing 95 Late Paleozoic coal samples from the Datanhao and Adaohai mines in Inner Mongolia, China, is used for the performance evaluation. Analytical results show that many instructive and surprising insights can be concluded from the first part of the PC algorithm. Compared with the hierarchical clustering algorithm, the first part of the PC algorithm demonstrates superiority in analyzing the modes of occurrence of elements in coal.

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“…Each coal has different characteristics. Eocene coal of Tanjung Formation at Tanjung Alam Jaya (TAJ Pit -1D) site at Tutupan area relatively has low to moderate ash yield (~8 wt%, dry basis) and moderate sulfur content (1.2 wt%, dry basis while Miocene coal contents very low ash yield (<3 wt%, dry basis) and low sulfur content (0.12 wt%, dry basis) [1,3]. The main controlling factors of coal's characteristics depends on the conditions of wetlands where peat accumulation and coalification [4].…”

Section: Introductionmentioning

confidence: 99%

Microfacies and Paleomire Reconstruction of Coal in the Tanjung Formation, Barito Basin, Kandangan Area, South Kalimantan

Sinabang,

Anggara,

Amijaya

et al. 2024

IOP Conf. Ser.: Earth Environ. Sci.

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The occurrence of the Tanjung Formation as a coal-bearing formation that has thick coals and is laterally distributed along in Barito Basin causes it to be well-known as one of the biggest coal-producing basins in Indonesia. The genesis of Eocene coal formed in terrestrial depositional environment influenced by freshwater and marine transgression is the uniqueness of this coal and interesting to examine maceral’s characteristic and its microfacies, and the evolution of paleomire seam AGM-B3, AGM-B4, AGM-B5, and AGM-B6 in Kandangan area by organic petrography’s analysis and coal’s chemical analysis. The result of subbituminous coal’s petrography show vitrinite is the most abundant maceral ranging from 56,.6% - 80.36% vol, liptinite (15.27% - 39.45% vol), inertinite (0.55% - 15.18% vol), and mineral matter (0.18% - 4.36% vol) which is dominated by pyrite. Based on maceral’s assemblages, coal’s microfacies divided into four groups are (1) telovitrinite-rich group, (2) detrovitrinite-rich group, (3) telovitrinite-liptinite-rich group, (4) inertinite-rich group. The basal section of seam AGM-B6 is characterized by detrovitrinite-rich group while seam AGM-B3, AGM-B4, and AGM-B5 are characterized by telovitrinite-liptinite-rich group. The middle section only represented the inertinite-rich group in seam AGM-B3, and the top section of the coal seams, except AGM-B6, is typically represented by the telovitrinite-rich group. The vertical profile of paleomire evolution shows a repetition of topogenous mire changing into ombrogenous mire and then back to topogenous mire. The paleomire type developed includes wet forest swamp, forested peatlands, and intermittently dry forested swamp and the environmental conditions are telmatic. The correlation between paleomire’s type and coal maceral’s abundance in the Kandangan area reflects that the type of vegetation from woody plants that underwent high degradation, moderate gelification, and intensive oxidation processes triggered by a short dry season.

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Coal deposition in the Barito Basin (Southeast Borneo): The Eocene Tanjung Formation compared to the Miocene Warukin Formation

Cited by 12 publications

References 65 publications

Geochemistry of Cenozoic coals from Sarawak Basin, Malaysia: implications for paleoclimate, depositional conditions, and controls on petroleum potential

Geochemistry of Cenozoic coals from Sarawak Basin, Malaysia: implications for paleoclimate, depositional conditions, and controls on petroleum potential

Advocating the Use of Bayesian Network in Analyzing the Modes of Occurrence of Elements in Coal

Microfacies and Paleomire Reconstruction of Coal in the Tanjung Formation, Barito Basin, Kandangan Area, South Kalimantan

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