Microstructures in the Cretaceous Bima Sandstone,Upper Benue Trough,N.E. Nigeria: Implication for hydrocarbon migration |
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| Institution: | 1. Geology Programme, Abubakar Tafawa Balewa University, Bauchi, P.M.B. 0248, Bauchi, Nigeria;2. Deparment of Geology and Mining, Nasarawa State University, Keffi, Nasarawa State, Nigeria;1. National Centre for Petroleum Research and Development, A.T.B.U, Bauchi, Nigeria;2. Department of Geology, University of Malaya, 50603, Kuala Lumpur, Malaysia;3. Department of Geology, Ekiti State University, P.M.B. 5363, Ado-Ekiti, Nigeria;4. Department of Geology, Abubakar Tafawa Balewa University, PMB 0248, Bauchi, Nigeria;1. High Level Engineering Research Center of Biopharmaceutical Molecules and Diagnostic Apparatuses, Jiangxi Provincial Colleges and Universities, Jiangxi Science and Technology Normal University, Nanchang, Jiangxi 330013, China;2. Jiangxi Key laboratory of Surface Engineering, Jiangxi Science and Technology Normal University, Nanchang, Jiangxi 330013, China;3. College of Chemistry, Sichuan University, Chengdu, Sichuan 610064, China;1. Institut de Cancerologie de l''Ouest - Centre René Gauducheau, Saint-Herblain, France;2. Centrum Onkologii, Instytut im. M. Sklodowskiej-Curie, Krakow, Poland;3. Department of Medical Oncology, Aristotle University of Thessaloniki School of Medicine, Papageorgiou Hospital, Thessaloniki, Greece;4. UOC di Oncologia Medica, Università Cattolica del S. Cuore, Rome, Italy;5. Merck KGaA, Darmstadt, Germany;6. Cancer Communications and Consultancy Ltd, Knutsford, Cheshire, UK;7. Siriraj Hospital, Bangkok, Thailand;1. Geology Programme, Abubakar Tafawa Balewa University, Bauchi, PMB 0248 Bauchi, Nigeria;2. School of Geography, Earth and Environmental Sciences, Plymouth University, Drake Circus, Plymouth, Devon PL4 8AA, UK |
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| Abstract: | Faulting related to movements along major fault zones in the Upper Benue Trough during Albian times, with evidence of deformation in the Cretaceous Bima Sandstone are common especially around the Kaltungo, Gombe, Zambuk and Teli lineaments. Conjugate extensional systems of deformation bands show increased siliceous cementation of the sandstones adjacent to these lineaments. During the Late Cretaceous compressional event, the deformation bands and faults in the Upper Benue Trough were reactivated, resulting into dilational opening of fractures believed to have acted as fluid conduits and/or barriers. These deformation bands which decrease in density away from the major faults are characterized with increasing porosity and permeability in the host sandstone abruptly away from the tectonic barrier. It is proposed here that the master faults of the Benue Trough, linking it with the Anambra Basin and the Niger Delta probably served as conduits for the migration of hydrocarbons into the Cretaceous reservoirs of the Upper Benue Trough and by extension into the Niger Delta. |
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