Palaeocene-Eocene organic sedimentary archives of Bikaner-Nagaur Basin, Rajasthan, India: An integrated revelation from biogeochemical and elemental proxies

Kumar, D. Nagesh; Ghosh, Santanu; Tiwari, Balram; Varma, Atul Kumar; Mathews, Runcie P.; Chetia, Rimpy

doi:10.1016/j.coal.2021.103848

Cited by 9 publications

(2 citation statements)

References 104 publications

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“…The origin of organic compounds from Angiosperms was also affirmed by the presence of olean-12-ene compounds in PLM 1, 2, 3, and 5 which derived from β-amirin as a precursor. A similar result was reported in the study of coastal sediments and soils around the city of Tromso [41][42]. The hopanoid triterpenoid compounds in Polaman sediments depicted the presence of C27-C30 hopane homologues such as Tm, 17β(H)-22,29,30-trisnorhopane, 17α(H),21β(H)-30norhopane, 17β(H),21β(H)-30-norhopane, 17β(H),21β (H)-hopane, and 17β(H),21α(H)-30-normorethane.…”

Section: Triterpenoidsupporting

confidence: 90%

“…Therefore, the presence of de-A-lupane in Polaman sediments affirmed the organic origin from higher terrestrial plants Angiosperms and the presence of bacterial input during sediment deposition [37,39]. This result was also supported by the presence of similar biomarkers in the Bikaner, Nagaur, Jalore, Jaisalmer, and Barmer districts of Rajasthan, western India, and Papua Basin, Papua New Guinea, as indicators of sources of terrestrial higher plant organic matter [40][41]. The origin of organic compounds from Angiosperms was also affirmed by the presence of olean-12-ene compounds in PLM 1, 2, 3, and 5 which derived from β-amirin as a precursor.…”

Section: Triterpenoidmentioning

confidence: 64%

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Organic Geochemical Characteristics of Ngrayong Formation Polaman Sediment Rock, Northeast Java Basin-Indonesia

Zetra,

Burhan,

Sulistiyono

et al. 2023

Indones. J. Chem.

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A study of the sedimentary rocks of the Ngrayong formation has been carried out on five samples from the Polaman outcrop point to determine the potential of coal as a source rock for producing oil and gas through GC-MS analysis. Biomarker analysis shows the presence of n-alkanes (C16-C36) with a bimodal distribution, indicating that the source of organic material in sedimentary rocks comes from bacteria, algae, and vascular plants, which is supported by several parameters such as CPI, OEP, LHCPI, wax index, ACL and AlkTerr values. This dominant source of terrigenous organic matter is also proven by the TAR value, C31/C19, C29/C17 ratio, and several aromatic compounds and their derivatives. Bacterial input as an organic source of allouchtonic sedimentary rocks is also proven by the presence of hopanoid, de-A-lupane biomarkers, and C17/C31 ratio. The oxic deposition environment is indicated by the Pr/Ph ratio. CPI and OEP parameters, C29 bb/ab ratio > 0.15 and C31 22S/(22S+22R) < 1 indicate low maturity of the sediment sample. Several parameters and the presence of biomarkers stated above conclude that Ngrayong coal as a source rock has the potential to produce oil and gas.

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Section: Triterpenoidsupporting

confidence: 90%

Section: Triterpenoidmentioning

confidence: 64%

Organic Geochemical Characteristics of Ngrayong Formation Polaman Sediment Rock, Northeast Java Basin-Indonesia

Zetra,

Burhan,

Sulistiyono

et al. 2023

Indones. J. Chem.

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Tertiary Coal and Lignite Deposits of India and their Source Rock Potential: A Review on the Contribution of the Indian Coal Petrologists

Kumar

2022

Journal of the Geological Society of India

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Coal could be utilized as an important source of energy because it contain an ample amount of organic matter favoring suitability for hydrocarbon generation and industrial utilization. Indian coal deposits are associated with two stratigraphic horizons: Gondwana coal of the Permian age and Tertiary coal and lignites of the Paleogene age. The Permian coal has high demand in India due to its grade, for industrial utilization and power generation, resulting in the shortage of reserves with a hike in price. Therefore, people are orientated to Tertiary coal and lignite deposits for their optimum utilization. The significant lignite deposits of India occur in the states Tamil Nadu, Gujarat, Rajasthan, Jammu & Kashmir, and Kerala. Besides the lignite horizons, coal-bearing horizon seams also occur in Tertiary sediments. The known coal deposits of the Tertiary age occur in the northern and north-eastern parts of India. In the northern region, Tertiary coal deposits occur in the state of Jammu & Kashmir. Whereas, in the north-eastern part, Tertiary coal deposits are located in Meghalaya, Assam, Arunachal Pradesh, and Nagaland. The objective of this review is to provide brief information about the contribution of Indian coal petrologists on various Tertiary coal deposits for their source rock potential.

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Spectral signatures of solvent-extracted macromolecules in Indian coals of different rank: Insights from fluorescence excitation-emission matrix

Sarkar,

Bhui,

Das

et al. 2024

Int J Coal Sci Technol

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Solvent-extracted fractions of six Indian coal samples of different ranks were investigated using multiple geochemical, petrological and spectroscopic proxies and an attempt was made to indicate possible fingerprint regions for different polycyclic aromatic hydrocarbons (PAH) with the help of excitation-emission matrix (EEM). In this study, for the very first time, the influence of rank and maturation of organic matter in the characterisation of coal solvent-extracts from Indian coals were perceived from the viewpoint of fluorescence EEM. Vitrinite reflectance (VRo) values were used to determine the general ranks of the original coal samples viz. lignite, subbituminous, bituminous and anthracite. Different fluorescence peak regions corresponding to different fused aromatic ring (FAR) systems were delineated using the EEM and their indicative depositional environments could be inferred. Our observations indicate that solvent-extracted fractions of low rank coals comprise of a larger number of shorter carbon chains compared to the other samples. For the low rank coal samples, the solvent-extracts show a strong humic influence and the presence of smaller PAH rings while for the medium rank coals, the extracted fractions tend to show a more bimodal distribution of PAHs, possibly comprising of different sized PAHs. Higher fluorescence sensitivity and quick response of smaller PAHs impart a singular centralised region in the EEM for the low rank coal samples while interference in the fluorescence of differently sized PAHs indicate a multimodal distribution of the fluorophores in the medium rank coals. The high rank coal used in this study shows a bimodal distribution with very low intensity of the peaks, indicating the low abundance of extractable macromolecules, possibly as a result of deformation.

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Palaeocene-Eocene organic sedimentary archives of Bikaner-Nagaur Basin, Rajasthan, India: An integrated revelation from biogeochemical and elemental proxies

Cited by 9 publications

References 104 publications

Organic Geochemical Characteristics of Ngrayong Formation Polaman Sediment Rock, Northeast Java Basin-Indonesia

Organic Geochemical Characteristics of Ngrayong Formation Polaman Sediment Rock, Northeast Java Basin-Indonesia

Tertiary Coal and Lignite Deposits of India and their Source Rock Potential: A Review on the Contribution of the Indian Coal Petrologists

Spectral signatures of solvent-extracted macromolecules in Indian coals of different rank: Insights from fluorescence excitation-emission matrix

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