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Litho-Bio Facies Analysis and Systematic Paleontology of Sediments in Amansiodo-1 Well, Anambra Basin, Southeastern Nigeria

Received: 10 April 2022     Accepted: 23 April 2022     Published: 8 June 2022
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Abstract

Sixty-two (62) ditch cutting samples were obtained from Amansiodo-1 well within the Anambra Basin, Nigeria, at depth intervals between 16 - 2191 m and analyzed for lithofacies, Foraminiferal, and systematically described. A total of thirty (30) benthonic foraminiferal species were retrieved: twenty-six (26) arenaceous and four (4) calcareous. The age of the well is determined to be Maastrichtian base on the appearance of benthonic arenaceous Haplophragmoides saheliense (Petters) species. Facies analysis of the samples indicated ten (10) lithofacies and two (2) facies associations. The facies comprise a base to top, the shale facies, shale/sandstone facies, shale/mudstone facies, mudstone/coal facies, sandstone/clay facies, mudstone/clay facies, very coarse sandstone facies, coarse sandstone facies, sandstone/clay facies and siltstone/clay facies, association FA-1 (subtidal) and FA-2 (Intertidal) corresponding to the Mamu Formation in the Anambra Basin. The studied sediments are assigned a shallow marine depositional environment based on the triangular plot of foraminiferal suborder test type (arenaceous, porcelaneous, and hyaline) and lithofacies distribution. The paleosalinity studies suggest a transition from brackish to an open marine depositional environment. Also, paleo-oxygenation of the sediments is anoxic based on foraminiferal distribution and the ratio of epifaunal to infaunal benthonic foraminifera respectively.

Published in Earth Sciences (Volume 11, Issue 3)
DOI 10.11648/j.earth.20221103.16
Page(s) 96-108
Creative Commons

This is an Open Access article, distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution and reproduction in any medium or format, provided the original work is properly cited.

Copyright

Copyright © The Author(s), 2022. Published by Science Publishing Group

Keywords

Paleontology, Paleosalinity, Biostratigraphy, Foraminifera, Paleo-Oxygenation

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Cite This Article
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    Lukman Musa Adamu, Nuhu George Obaje, Rufai Ayuba, Musa Tevorushung Kovona, Dare Anacetus Adesina, et al. (2022). Litho-Bio Facies Analysis and Systematic Paleontology of Sediments in Amansiodo-1 Well, Anambra Basin, Southeastern Nigeria. Earth Sciences, 11(3), 96-108. https://doi.org/10.11648/j.earth.20221103.16

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    ACS Style

    Lukman Musa Adamu; Nuhu George Obaje; Rufai Ayuba; Musa Tevorushung Kovona; Dare Anacetus Adesina, et al. Litho-Bio Facies Analysis and Systematic Paleontology of Sediments in Amansiodo-1 Well, Anambra Basin, Southeastern Nigeria. Earth Sci. 2022, 11(3), 96-108. doi: 10.11648/j.earth.20221103.16

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    AMA Style

    Lukman Musa Adamu, Nuhu George Obaje, Rufai Ayuba, Musa Tevorushung Kovona, Dare Anacetus Adesina, et al. Litho-Bio Facies Analysis and Systematic Paleontology of Sediments in Amansiodo-1 Well, Anambra Basin, Southeastern Nigeria. Earth Sci. 2022;11(3):96-108. doi: 10.11648/j.earth.20221103.16

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  • @article{10.11648/j.earth.20221103.16,
      author = {Lukman Musa Adamu and Nuhu George Obaje and Rufai Ayuba and Musa Tevorushung Kovona and Dare Anacetus Adesina and Nsikan Jackson Etukudo and Umaru Ohiani Aliyu},
      title = {Litho-Bio Facies Analysis and Systematic Paleontology of Sediments in Amansiodo-1 Well, Anambra Basin, Southeastern Nigeria},
      journal = {Earth Sciences},
      volume = {11},
      number = {3},
      pages = {96-108},
      doi = {10.11648/j.earth.20221103.16},
      url = {https://doi.org/10.11648/j.earth.20221103.16},
      eprint = {https://article.sciencepublishinggroup.com/pdf/10.11648.j.earth.20221103.16},
      abstract = {Sixty-two (62) ditch cutting samples were obtained from Amansiodo-1 well within the Anambra Basin, Nigeria, at depth intervals between 16 - 2191 m and analyzed for lithofacies, Foraminiferal, and systematically described. A total of thirty (30) benthonic foraminiferal species were retrieved: twenty-six (26) arenaceous and four (4) calcareous. The age of the well is determined to be Maastrichtian base on the appearance of benthonic arenaceous Haplophragmoides saheliense (Petters) species. Facies analysis of the samples indicated ten (10) lithofacies and two (2) facies associations. The facies comprise a base to top, the shale facies, shale/sandstone facies, shale/mudstone facies, mudstone/coal facies, sandstone/clay facies, mudstone/clay facies, very coarse sandstone facies, coarse sandstone facies, sandstone/clay facies and siltstone/clay facies, association FA-1 (subtidal) and FA-2 (Intertidal) corresponding to the Mamu Formation in the Anambra Basin. The studied sediments are assigned a shallow marine depositional environment based on the triangular plot of foraminiferal suborder test type (arenaceous, porcelaneous, and hyaline) and lithofacies distribution. The paleosalinity studies suggest a transition from brackish to an open marine depositional environment. Also, paleo-oxygenation of the sediments is anoxic based on foraminiferal distribution and the ratio of epifaunal to infaunal benthonic foraminifera respectively.},
     year = {2022}
    }
    

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  • TY  - JOUR
    T1  - Litho-Bio Facies Analysis and Systematic Paleontology of Sediments in Amansiodo-1 Well, Anambra Basin, Southeastern Nigeria
    AU  - Lukman Musa Adamu
    AU  - Nuhu George Obaje
    AU  - Rufai Ayuba
    AU  - Musa Tevorushung Kovona
    AU  - Dare Anacetus Adesina
    AU  - Nsikan Jackson Etukudo
    AU  - Umaru Ohiani Aliyu
    Y1  - 2022/06/08
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    T2  - Earth Sciences
    JF  - Earth Sciences
    JO  - Earth Sciences
    SP  - 96
    EP  - 108
    PB  - Science Publishing Group
    SN  - 2328-5982
    UR  - https://doi.org/10.11648/j.earth.20221103.16
    AB  - Sixty-two (62) ditch cutting samples were obtained from Amansiodo-1 well within the Anambra Basin, Nigeria, at depth intervals between 16 - 2191 m and analyzed for lithofacies, Foraminiferal, and systematically described. A total of thirty (30) benthonic foraminiferal species were retrieved: twenty-six (26) arenaceous and four (4) calcareous. The age of the well is determined to be Maastrichtian base on the appearance of benthonic arenaceous Haplophragmoides saheliense (Petters) species. Facies analysis of the samples indicated ten (10) lithofacies and two (2) facies associations. The facies comprise a base to top, the shale facies, shale/sandstone facies, shale/mudstone facies, mudstone/coal facies, sandstone/clay facies, mudstone/clay facies, very coarse sandstone facies, coarse sandstone facies, sandstone/clay facies and siltstone/clay facies, association FA-1 (subtidal) and FA-2 (Intertidal) corresponding to the Mamu Formation in the Anambra Basin. The studied sediments are assigned a shallow marine depositional environment based on the triangular plot of foraminiferal suborder test type (arenaceous, porcelaneous, and hyaline) and lithofacies distribution. The paleosalinity studies suggest a transition from brackish to an open marine depositional environment. Also, paleo-oxygenation of the sediments is anoxic based on foraminiferal distribution and the ratio of epifaunal to infaunal benthonic foraminifera respectively.
    VL  - 11
    IS  - 3
    ER  - 

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Author Information
  • Department of Earth Sciences, Kogi State University, Anyigba, Nigeria

  • Department of Geology, Nigerian National Petroleum Corporation Professorial Chair in Basinal Studies, Ibrahim Badamasi Babangida University, Lapai, Nigeria

  • Department of Earth Sciences, Kogi State University, Anyigba, Nigeria

  • Department of Geology, Ahmadu Bello University, Zaria, Nigeria

  • Department of Earth Sciences, Kogi State University, Anyigba, Nigeria

  • Department of Geology, Akwa Ibom State University, Ikot, Nigeria

  • Department of Geology, University of Maiduguri, Borno, Nigeria

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