Lithotype (maceral) composition and variation as correlated with paleo-wetland environments, Gates Formation, northeastern British Columbia, Canada

Lamberson, M.N.; Bustin, R. Marc; Kalkreuth, W.

doi:10.1016/0166-5162(91)90045-k

Cited by 122 publications

(75 citation statements)

References 5 publications

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“…Gelification Index (GI) and Tissue Preservation Index (TPI) were introduced by Diessel (1986) to characterize the depositional environments of Australian coals. Subsequently, some scientists made critical comments against the usage of these indices especially for Tertiary coals and lignites (Lamberson et al, 1991;Crosdale, 1993;Dehmer, 1995;Scott, 2002;Moore and Shearer, 2003;Amijaya and Littke, 2005). However, modifications were made in the indices by some researchers to make it applicable for other coals (Calder et al, 1991).…”

Section: Depositional Environmentmentioning

confidence: 99%

Petrographic and Geochemical Characterization of Coals from Tiru Valley, Nagaland, NE India

Singh

et al. 2012

Energy Exploration & Exploitation

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In Tiru valley region of Mon district coals occur in Barail Formation and are of Oligocene age. This study is the first investigation on the petrographic and geochemical characterization of these coals. These thinly bedded seams (<2 m) need systematic exploration for proper evaluation of the resource.The coals are bright to moderately bright in appearance and at places look moderately dull. The study reveals that Tiru valley coals are sub-bituminous to bituminous-D in rank. The chemical study reveals that these coals are perhydrous in nature with moderately high volatile matter content. The sulphur content was probably increased with pyrite inclusion as the most abundant mineral. Vitrinite is the most dominant maceral group constituting nearly 98% of all the macerals while liptinite and inertinite occur in very low concentration. Facies-critical models used to decipher the paleodepositional environment suggest that these coals evolved under wet moor with moderately high flooding in the paleomire which allowed the sulphate reducing bacteria to thrive.

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Section: Depositional Environmentmentioning

confidence: 99%

Petrographic and Geochemical Characterization of Coals from Tiru Valley, Nagaland, NE India

Singh

et al. 2012

Energy Exploration & Exploitation

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“…Inertinite in general, and fusinite in particular, have been treated as important indicators of "dry" conditions within mires in some petrographically based reconstructions of environments (Hacquebard and Donaldson, 1969;Gelification Index of Diessel, 1982Harvey and Dillon, 1985;Grady and Eble, 1990;Eble and Grady, 1990;Lamberson et al, 1991;Kalkreuth et al, 1991 but not by Calder et al, 1991or Calder, 1993. For fusinite, this inference appears to be based on the assumption that burning is likely to be more frequent in parts of mires with exposed, even if wet, substrates.…”

mentioning

confidence: 99%

Paleobotanical and paleoecological constraints on models of peat formation in the Late Carboniferous of Euramerica

DiMichele

Phillips

1994

Palaeogeography, Palaeoclimatology, Palaeoecology

273

119

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“…When the peat is flooded by water, vitrinite and geloinertinite tend to form. On the other hand, when the water table is lower and the peat surface becomes dryer or moist, teloinertinite and detroinertinite will form in the peat surface due to oxidation (Lamberson et al, 1991) GWI = Huminite + Macrinite Fusinite + Semifusinite + Sclerotinite + Inertedotrinite GWI and GI have different concepts. GWI changes reflect the fluctuation of water table which could happen in both high and low moor peat types.…”

Section: Methodsmentioning

confidence: 99%

Depositional Cycles of Muara Wahau Coals, Kutai Basin, East Kalimantan

Anggayana¹,

Rahmad²,

Widayat³

2014

Indonesian J. Geosci.

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-Fifteen samples were taken ply by ply from a 33 m thick drill core of Muara Wahau coal seams for interpretation of depositional environments. Generally, lithotype variation in the bottom part of the coal seams has a lower frequency than in the upper part. Petrographical analysis was performed to determine the maceral composition, groundwater index (GWI), and gelification index (GI). The samples from lower sections show much higher GWI-GI values and lower variation frequency than from the upper section. This characteristic is interpreted as the result of development of mesotrophic to ombrotrophic peats during the deposition of lower to upper parts of the section, respectively. During the development of the mesotrophic peat, water was more abundant and relatively stable in budget. However, during the development of ombrotrophic peat, water was less abundant and relatively not stable in budget. The latter is related to the water supply depending only on rain, resulted in the more sensitive water table in the ombrotrophic peat. The unstable water table is thought as the reason of higher variation frequency of lithotype, GWI, GI, as well as maceral composition in the upper part of the core. Unstable water table would lead to moist condition in the uppermost layer of the ombrotrophic peat, favoring fungi to grow. This is confirmed by the higher abundance of sclerotinite maceral in samples from the upper part of the coal core.

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Lithotype (maceral) composition and variation as correlated with paleo-wetland environments, Gates Formation, northeastern British Columbia, Canada

Cited by 122 publications

References 5 publications

Petrographic and Geochemical Characterization of Coals from Tiru Valley, Nagaland, NE India

Petrographic and Geochemical Characterization of Coals from Tiru Valley, Nagaland, NE India

Paleobotanical and paleoecological constraints on models of peat formation in the Late Carboniferous of Euramerica

Depositional Cycles of Muara Wahau Coals, Kutai Basin, East Kalimantan

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