Geochemical characterisation of Early Cretaceous lacustrine sediments of Bima Formation, Yola Sub-basin, Northern Benue Trough, NE Nigeria: Organic matter input, preservation, paleoenvironment and palaeoclimatic conditions

Yandoka, Babangida M. Sarki; Abdullah, Wan Hasiah; Abubakar, M.; Hakimi, Mohammed Hail; Adegoke, Adebanji Kayode

doi:10.1016/j.marpetgeo.2014.12.010

Cited by 133 publications

(61 citation statements)

References 61 publications

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“…Previous research has suggested that the relative contents and distribution of some major and TEs in fine-grained rocks could infer the paleoclimatic conditions [6,15,39,65]. A consensus has been achieved by previous studies [15,39,66] that Fe, Mn, V, Cr, Co, and Ni are relatively enriched under moist climatic conditions. On the contrary, the upwelling of water alkalinity owing to evaporation under arid climatic conditions facilitates saline minerals to precipitate, so elements like Ca, Mg, Na, K, Ba, and Sr are comparatively concentrated.…”

Section: Paleoclimatic Conditionsmentioning

confidence: 99%

“…In addition, some trace element ratios, such as Sr/Cu and Ga/Rb ratios, can also be employed for characterizing the paleoclimate [6,65,66]. Ga is chiefly enriched in the clay minerals, especially in kaolinite, implying warm and humid climatic conditions [65,68].…”

Section: Paleoclimatic Conditionsmentioning

confidence: 99%

“…In general, fine-grained sediments are characterized by low Sr/Cu ratios and high Ga/Rb ratios in warm and humid climatic conditions [6,15]. The value of Sr/Cu ratios between 1.3 and 5.0 can indicate warm-humid environments, whereas the value in excess of 5.0 represents hot-arid climatic conditions [15,66]. Figure 13 displays that the values of Ga/Rb and Sr/Cu ratios in shale and mudstone samples vary 0.14-0.28 and 3.38-54.17, on average of 0.19 and 16.5, respectively, while the corresponding values in marlstone samples are 0.16-0.19 and 10.39-31.91, on average of 0.18 and 16.33, respectively.…”

Section: Paleoclimatic Conditionsmentioning

confidence: 99%

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Elemental Geochemical Evidence for Depositional Conditions and Organic Matter Enrichment of Black Rock Series Strata in an Inter-Platform Basin: The Lower Carboniferous Datang Formation, Southern Guizhou, Southwest China

et al. 2018

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The Datang Formation black rock series deposited in an inter-platform basin are considered to be one of the main source rocks in Southwest China. However, their depositional conditions and organic matter enrichment in such a setting are not well understood. In this study, geochemical characteristics of total organic carbon (TOC), major, trace and rare earth elements (REEs) of thirty black rock series samples from a newly-cut roadside outcrop (Zhenning section) in Southern Guizhou, Southwest China are systematically investigated to examine provenance, paleoredox conditions, paleoclimate, paleoproductivity and sedimentary rate, and further to explore their influence on organic matter enrichment. Results show that TOC contents of the investigated samples range from 0.90% to 2.83%, with an average of 1.45%, with TOC variations being in accord with the stratigraphic cyclicity. These data also indicate that the target black rock series were deposited in a combination of continental island arc and active continental margin tectonic setting that exhibited moderate weathering, oxic/dysoxic oxygen levels, hot and arid to semiarid climate, and a higher sedimentary rate. Multiple paleoredox indicators (e.g., Ni/Co, V/Cr, U/Th and V/(V + Ni) ratios), together with slightly negative Ce anomalies and EF U -EF Mo covariation, totally suggest an oxic/dysoxic water environment, which is usually considered unfavorable for organic matter preservation. Average (La/Yb) N ratios (1.41) reflect a higher sedimentary rate, resulting in shortening the exposure time of organic matter in the degradation region of aerobic bacteria under oxic/dysoxic conditions. Of the three factors that could affect organic matter enrichment, including paleoproductivity, paleoredox conditions and sedimentary rate, the relatively high paleoproductivity indicated by the relatively high TOC contents appears to be the dominant factor. In contrast, the other two factors, i.e., paleoredox conditions and the rate of sedimentation play relatively less significant roles. Based on these factors, an enrichment model of organic matter for the black rock series in Southern Guizhou Depression is established. These findings also contribute to constraining the sedimentary environment in such a setting and further deepen our understanding of the potential shale gas resources of the Southern Guizhou Province.

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Section: Paleoclimatic Conditionsmentioning

confidence: 99%

Section: Paleoclimatic Conditionsmentioning

confidence: 99%

Section: Paleoclimatic Conditionsmentioning

confidence: 99%

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Elemental Geochemical Evidence for Depositional Conditions and Organic Matter Enrichment of Black Rock Series Strata in an Inter-Platform Basin: The Lower Carboniferous Datang Formation, Southern Guizhou, Southwest China

et al. 2018

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“…Acyclic isoprenoids (pristane/phytane ratios) have been widely used as indicators of organic matter source inputs and paleo-redox conditions in depositional environments (Peters et al, 2005;Adegoke et al, 2014;Sarki Yandoka et al, 2015). Organic matter originating from terrestrial plants would be expected to (Peters and Moldowan, 1993;Hakimi et al, 2011).…”

Section: Paleo-redox Conditionsmentioning

confidence: 99%

Sedimentology, geochemistry and paleoenvironmental reconstruction of the Cretaceous Yolde formation from Yola Sub-basin, Northern Benue Trough, NE Nigeria

Yandoka

Abubakar

Abdullah

et al. 2015

Marine and Petroleum Geology

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“…Therefore, to clarify the organic matter accumulation mechanism in a lacustrine rift basin, it is important to characterize organic matter sources, depositional paleoenvironment, and water column properties. Organic geochemical parameters and elemental geochemistry are effective methods because they can provide vast information about organic matter source, climate condition, primary productivity, and redox conditions (Cao, Liu, et al, ; Ding et al, ; Fu, Wang, Zeng, Tan, & Feng, ; Hao et al, ; Harris, Freeman, Pancost, White, & Mitchell, ; Jia, Bechtel, et al, ; Ma, Wang, Lv, Li, & Yi, ; Makeen, Hakimi, & Abdullah, ; Quan et al, ; Sarki Yandoka, Abdullah, Abubakar, Hakimi, & Adegoke, ).…”

Section: Introductionmentioning

confidence: 99%

Geochemical characteristics, depositional environment, and controlling factors of Lower Cretaceous shales in Chagan Sag, Yingen‐Ejinaqi Basin

et al. 2017

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The Lower Cretaceous shales of Chagan Sag, Yingen‐Ejinaqi Basin, are considered as the source rocks of hydrocarbons discovered in the sag. Borehole shales from the Lower Cretaceous were subjected to comprehensive geochemical study to evaluate the quality of source rock, to reconstruct the paleodepositional environment and to determine the controlling factors of organic matter enrichment. Content of present‐day total organic carbon, and hydrogen index, averaging 1.4% and 259.2 mg hydrocarbon/g total organic carbon, respectively reveal poor to fair quality of organic matter. Average value of vitrinite reflectance (Ro) of 1.0% indicates mature organic matter. Maceral composition and biomarker analysis provide evidence for a mixed aquatic and terrigeous organic matter input. Based on Sr/Cu, Sr/Ba, and gammacerane index, we propose that organic matter was deposited in closed hypersaline under hot and arid climate conditions. The ratios of V/(V + Ni), and pristane/phytane (Pr/Ph), as well as the presence of β‐carotene suggest a stratified water column with anoxic bottom water condition. Low to moderate productivity as a result of deficient nutrient supply, the excellent organic matter preservation condition under stratified anoxic water column and high sedimentary rate controlled the quality of source rock. In addition, influence of factors such as content of clay minerals on organic matter enrichment cannot be ignored.

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Geochemical characterisation of Early Cretaceous lacustrine sediments of Bima Formation, Yola Sub-basin, Northern Benue Trough, NE Nigeria: Organic matter input, preservation, paleoenvironment and palaeoclimatic conditions

Cited by 133 publications

References 61 publications

Elemental Geochemical Evidence for Depositional Conditions and Organic Matter Enrichment of Black Rock Series Strata in an Inter-Platform Basin: The Lower Carboniferous Datang Formation, Southern Guizhou, Southwest China

Elemental Geochemical Evidence for Depositional Conditions and Organic Matter Enrichment of Black Rock Series Strata in an Inter-Platform Basin: The Lower Carboniferous Datang Formation, Southern Guizhou, Southwest China

Sedimentology, geochemistry and paleoenvironmental reconstruction of the Cretaceous Yolde formation from Yola Sub-basin, Northern Benue Trough, NE Nigeria

Geochemical characteristics, depositional environment, and controlling factors of Lower Cretaceous shales in Chagan Sag, Yingen‐Ejinaqi Basin

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