A palynology and paleoenvironmental study of a section from the Amansiodo-1 well, Anambra Basin, southeastern Nigeria

• Autorzy: Chukwuma-Orji J. N. , Okosun E. A. , Ekom J. C. , Abolarin J. F.

Identyfikatory

DOI

10.7494/geol.2017.43.4.293

• Języki publikacji: EN

Abstrakty

EN

Palynological analysis was carried out on twenty (20) ditch cutting samples from a section (1284.73–1496.57 m) of the Amansiodo-1 well, Anambra Basin, southeastern Nigeria with the aim of determining the age, biozone, and depositional environment of the sediments within the depth interval. The laboratory techniques of digesting sediments in hydrochloric and hydrofluoric acids for silicates and carbonates removal were followed to process the samples for the recovery of palynomorphs. Fifty two (52) palynomorph specimens were recovered. An assemblage zone of Echitriporites trianguliformis Zone has been established. The section was dated to the upper Maastrichtian due to the occurrences of age diagnostic marker species such as: Cingulatisporites ornatus, Distaverrusporites simplex, Proteacidites sigalii, Dinogymnium cf auclaense, Echitriporites trianguliformis and Retidiporites magdalensis. Based on the palynomorph marine index and environmental indicator flora, the section was inferred to be deposited in marine to brackish (coastal) environments with little influence of fresh water.

Słowa kluczowe

EN

southeastern Nigeria; Anambra Basin; palynology; paleoenvironment; Amansiodo-1 well

• Wydawca: Wydawnictwa AGH
• Czasopismo: Geology, Geophysics and Environment
• Rocznik: 2017
• Tom: Vol. 43, no. 4
• Strony: 293--301
• Opis fizyczny: Bibliogr. 23 poz., rys., tab., wykr.

Twórcy

autor

Chukwuma-Orji J. N.

• Federal University of Technology, Department of Geology; Minna, Nigeria

autor

Okosun E. A.

• Federal University of Technology, Department of Geology; Minna, Nigeria

autor

Ekom J. C.

• Federal University of Technology, Department of Geology; Minna, Nigeria

autor

Abolarin J. F.

• Federal University of Technology, Department of Geology; Minna, Nigeria

Bibliografia

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Uwagi

PL

Opracowanie rekordu w ramach umowy 509/P-DUN/2018 ze środków MNiSW przeznaczonych na działalność upowszechniającą naukę (2018).