Petrographic composition and depositional environments of Cretaceous coals and coal measures in the Middle Benue Trough of Nigeria

Obaje, Nuhu George; Ligouis, Bertrand; Abaa, S.I.

doi:10.1016/0166-5162(94)90012-4

Cited by 60 publications

(36 citation statements)

References 6 publications

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“…1 and 3). Reviews on the geology and stratigraphic successions in the Benue Trough with details on each formation, bed thicknesses, lateral extensions and stratigraphic locations have been given by Carter et al (1963), Offodile (1976), Petters (1982), Petters and Ekweozor (1982), Obaje (1994) amongst others. Details on the evolution and stratigraphic framework of the Chad Basin have been given in Avbovbo et al (1986) and Olugbemiro et al (1997).…”

Section: Regional Geologic Settingmentioning

confidence: 99%

Geochemical evaluation of the hydrocarbon prospects of sedimentary basins in Northern Nigeria

et al. 2006

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Sedimentary basins of Northern Nigeria comprise the Middle and Upper Benue Trough, the southeastern sector of the Chad Basin, the Mid-Niger (Bida) Basin, and the Sokoto Basin. Organic geochemical and organic petrologic studies indicate the existence of potential source rocks in the Benue Trough and the Chad Basin, with coal beds constituting major potential source rocks in the whole of the Benue Trough. The generation and production of liquid and gaseous hydrocarbons from coal beds presently is world-wide indisputable.Although TOC values and liptinite contents are relatively high in the Mid-Niger (Bida) Basin, Tmax values and biomarker data show that hydrocarbons are probably just being generated in the basin and may not yet have been expelled nor migrated in large quantities.

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Section: Regional Geologic Settingmentioning

confidence: 99%

Geochemical evaluation of the hydrocarbon prospects of sedimentary basins in Northern Nigeria

et al. 2006

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“…Obaje et al, 1994;Obaje & Abbas, 1996a;Obaje & Ligouis, 1996b;Obaje, 2000;Obaje & Hamza, 2000;Rayment, 1965;Lawal, 1982). Thus, only the vital salient areas will be discussed in this study to avoid repetition.…”

Section: Geological Settings Of the Benue Trough / Gombe Formationmentioning

confidence: 99%

An Assessment of the Hydrocarbon Potential of the Gombe Formation, Upper Benue Trough, Northeastern Nigeria: Organic Geochemical Point of View

Onoduku¹,

Okosun²,

Akande³

2013

ESR

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Gombe Formation is a heterogeneous sequence within the Upper Benue Trough consisting principally of shales with sands, clays and intercalations of coal. It is over 600 m thick maximally in some parts of the sub-basin and has been dated Maastritchtian. Fifteen (15) core samples from 3 boreholes (BA-7, BA-16 and BA-17) dug around the Maiganga Coal Mine have been studied geochemically using the Rock-Eval 6 method with the principal aim of evaluating their potential as possible source rocks for petroleum. The results of the Rock-Eval analysis for analyzed core samples from these boreholes within Gombe Formation shows that the samples in boreholes BA-7 and BA-16 contain Type II kerogen while those from borehole BA-17 contain Type III kerogen, and that the samples from boreholes BA-7 and BA-16 have very good generative potential while those from borehole BA-17 have good to very good potential. This study also reveals that the analyzed samples especially those from boreholes BA-7 and BA-16 may constitute good source rocks if the burial depth is sufficient. The Rock-Eval Tmax data available for thermal maturity assessment of the samples suggest that the analyzed samples from the three boreholes are thermally immature. This assessment is consistent with the immaturity status of their coeval Formations (Pindiga and Gongila Formations) in other part of the Benue Trough, suggesting that these contemporaneous Formations may be related in depth and/or have experienced similar geothermal gradient. It is therefore recommended that the thermal maturity of the analyzed samples from the three boreholes be re-evaluated by other thermal maturity indices such as vitrinite reflectance measurement and biomarker evaluation in order to further authenticate the maturity status of the Formation.

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“…The VI is a measure of vegetation type by contrasting the macerals of forest affinity with those of herbaceous and marginal aquatic affinity. Later on, those indices were adapted to assess the development of paleomires in different areas, for example [38,40].…”

Section: Vegetation and Groundwater Indexmentioning

confidence: 99%

“…Those indices were also used and modified to define the depositional environment of coals from different areas and ages (e.g., [26,37,38] and many others). Based on the modification by Lamberson et al, 1991 [23], Amijaya and Littke, 2005 [39], modified for their studied Tertiary Tanjung Enim low-rank coal from Sumatra as telovitrinite macerals were substituted by their precursors (humotelinite), detrovitrinite by humodetrinite, and gelovitrinite by humocollinite.…”

Section: Tissue Preservation and Gelificationmentioning

confidence: 99%

A Comparison of Maceral and Microlithotype Indices for Interpretation of Coals in the Samarinda Area, Lower Kutai Basin, Indonesia

Win

Amijaya

Surjono

et al. 2014

Advances in Geology

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Strata of the Middle Miocene Balikpapan Formation from the Lower Kutai basin are well exposed in a section near the Samarinda city, East Kalimantan, Indonesia. The succession is characterized by thick sandstone bodies alternating with shales and coal beds. A 250 m thick composite section of exposed sediments (not including the soil interval) was measured, from which 25 coal samples were collected. Petrographic, microlithotype, and maceral analyses were performed in order to determine the depositional environment of the Samarinda coals. In order to assess the development of paleomires, coal facies diagrams were obtained from microlithotype and maceral composition. According to the organic petrologic results, the Samarinda coals represent a highly degraded humodetrinite-rich group deposited from terrestrial into telmatic condition of peat formation with vegetation characteristics of highly degraded woody forest type evolved under alternate oxic to anoxic moor conditions. These formed with intermittent moderate to high flooding as the paleopeat environment shifted from mesotrophic to ombrotrophic.

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Petrographic composition and depositional environments of Cretaceous coals and coal measures in the Middle Benue Trough of Nigeria

Cited by 60 publications

References 6 publications

Geochemical evaluation of the hydrocarbon prospects of sedimentary basins in Northern Nigeria

Geochemical evaluation of the hydrocarbon prospects of sedimentary basins in Northern Nigeria

An Assessment of the Hydrocarbon Potential of the Gombe Formation, Upper Benue Trough, Northeastern Nigeria: Organic Geochemical Point of View

A Comparison of Maceral and Microlithotype Indices for Interpretation of Coals in the Samarinda Area, Lower Kutai Basin, Indonesia

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