GRANULOMETRIC AND GEOCHEMICAL ASSESSMENT OF AJALI SANDSTONE IN FUGAR AREA IN BENIN FLANK OF ANAMBRA BASIN, NIGERIA

The aim of this study is to carry out granulometric and geochemical assessment of Ajali Sandstone outcrops in Fugar area in Benin Flank of Anambra Basin, Nigeria using results from grain size, major oxide and trace elements analyses. The study area lies between longitudes 06o 35’ 04” E and 06o 35’ 56” E and latitudes 07o 05’ and 21” N 07o 05’ 52” N. Five samples were collected from the study area for the analyses. Automated sieve shaking machine and Epsilon-5 x-ray fluorescence pAnalytical model were used. The sediments are fine-grained to coarse-grained poorly sorted to very well sorted. The sediments are strongly fine skewed to strongly coarse skewed. The sedimentary structures and the bimodal distribution of the grain size parameters pointed to intertidal environment of deposition for the sediments. SiO2 has the average concentration of 81.78 wt. % with range of 81.6 – 82.0 wt. %. It is followed by Al2O3 with average concentration of 9.41 wt. %. Fe2O3 has average concentration of 5.61 wt. %. Zr has average concentration of 1,500 ppm followed by Ba with mean concentration values of 1,290 ppm. Cu has an average concentration of 280.5 ppm. Conversely, U, Th, Co, Ni, As, Au and Pb have low concentration in the analysed samples. The sandstone samples are highly ferruginised because of their high Fe2O3 contents. The presence of ferromagnesian trace elements such as Cr, V and Co enrichment and the high weight percentages of SiO2 in the sandstone samples indicated origin from source rocks such as granites and migmatites. The sandstones from the study area are suitable raw materials for construction because of the negligible contents and non-pollution level of the radioactive elements in them.&nbsp

Taxonomic Notes on Some Species of Genus Globigerinoides from Kafe Field, Offshore Western Niger Delta, Nigeria

The aim of the study is to identify and record the taxonomic notes on species of Genus Globigerinoides from the study area located in Kafe field of the offshore western Niger Delta area of Nigeria. 550 ditch cuttings samples were retrieved at 18.29 metres intervals from the five wells studied (Kafe-1, Kafe-2, Kafe-4, Kafe-5 and Kafe-6). The standard micropaleontological preparation technique for foraminiferal samples was employed. The foraminiferal contents were identified under binocular microscope and recorded. The species of the Genus Globigerinoides identified are Globigerinoides obliquus BOLLI, Globigerinoides extremus BOLLI and BERMUDEZ, Globigerinoides quadrilobatus D’ORBIGNY, Globigerinoides subquadrilobatus (BRÖNNIMANN), Globigerinoides trilobus REUSS and Globigerinoides sacculifer BRADY and their taxonomic notes were documented accordingly

SEISMIC STRATIGRAPHIC AND STRUCTURAL CHARACTERIZATION OF XY-1 (TOMBOY) FIELD, OFFSHORE WESTERN NIGER DELTA, NIGERIA

The focal aim of the study is to map the structures in the study area using seismic characterization methodology. Key stratal terminations such as onlaps, toplaps and erosional unconformities (or truncations) were recognized. Nine surface boundaries, namely: four maximum flooding surfaces and five sequence boundaries were detected as peaks and troughs of the seismic onsets, respectively. The maximum flooding surfaces and the sequence boundaries depths were converted to time in milliseconds using check shot data. The converted time represents two-way travel time. Accordingly, the wireline logs were effectively tied to the seismic lines for better stratigraphic interpretation. The structural style of the field is characterized by two systems of antithetic and growth faults. On the seismic lines, shale structures were recognized as zones of chaotic or transparent seismic reflection

Palynomorphs Content and Paleodepositional Environments of Mamu Formation in Okpekpe-1, Imiegba-1 and Imiegba-2, Benin Flank of Anambra Basin, Nigeria

Twenty surface samples were taken from road cuttings along Okpekpe and Imiegba areas located in Benin Flank of Anambra Basin, Nigeria with an aim to establish the biozones, age and paleodepositional environments of the Mamu Formation. Using palynological laboratory standard procedures, the shale surface samples collected from the Mamu Formation in the study area were prepared and analyzed. The recovered marker pollens, spores and dinoflagellate cysts from the study area are Milforadia jardinei, Milforadia sp., Longapertites  marginatus, Longapertites sp., Retidiporites sp., Monocolpites marginatus,Cyathidites minor, Cyathidites spp., Cingulatisporites ornatus, Distaverrusporites simplex, Laevigatosporites spp., Foveotriletes margaritae, Subtilisphaera sp., Andalusiella sp., Paleocystodinium australinium and microforaminiferal wall linings. Four biozones were erected for the shale intervals in the study area, namely: Longapertites sp., Monocolpites marginatus, Cyathidites minor, and Paleocystodinium australinium biozone, respectively, dated to Upper Maastrichtian to Early Paleocene age, which are lateral equivalents to Spinizonocolpites baculatus biozone of the Upper Benue Trough. The presence of the dinoflagellates cysts such as Paleocystodinium australinium, Subtilisphaera sp. and Andalusiella sp., microforaminiferal wall linings, pollens and spores established that the shales were deposited in nearshore to shallow marine environments. The presence of Cingulatisporites ornatus and Distaverrusporites simplex are indicative of marine regression that was followed by fluvial continental influence in anoxic bottom conditions that in turn favored the formation of coal seams in shales in the study area. The paucity of palynomorphs in the study area is inferred to have occurred because of the dry climatic condition that prevailed during the Upper Maastrichtian to Early Paleocene

LITHOSTRUCTURAL RELATIONSHIPS AND PETROGENETIC AFFINITIES OF THE BASEMENT COMPLEX ROCKS AROUND OKPELLA, NIGERIA

Okpella area is the eastern extension of the Igarra Schist Belt, Southwestern Nigerian Basement Complex. The area comprises granite gneiss, metasedimentary rocks and Pan-African intrusives. Metasedimentary rocks occurring in the area include garnet-biotite schist, marble and calc-silicate gneiss, quartzite and Banded Iron Formation (BIF). The Pan-African intrusives include granite, charnockite, hybrid rocks, pegmatite, aplite and basic dykes. Structural data of rocks in the area suggest the presence of two contrasting structural trends. The older one which appears restrictedto thegranite gneiss, calc-silicate gneissandgarnet-biotite schisttrendsENE-WSWtoEW with moderate dips to the south. The latter NW-SE to NS trend is pervasive and occurs in all the metasediments and granite gneiss. These two trends are related to two deformational episodes and probably two orogenic periods. All the metasediments show affinity for sedimentary parentage, the granite gneiss is probably of igneous origin while the intrusives are magmatic. The charnockite-granite hybrid rock probably represents a zone of magma mixing between two contrasting magmas that were emplaced contemporaneously. The occurrence of metacarbonates in association with deformed metapelites as well as the complete absence of metavolcanics in the area suggests deposition of their protoliths in a continental environment along which crustal distention occurred. A sequence of nine geological events is suggested for the evolution of the area as deduced from field observation

Elucidation of the Fourth-Order Generalized Schrodinger Problem for Hydrogen Atom using Frobenius Series Application

The hydrogen atom is a fundamental system in quantum mechanics that has been extensively studied due to its simplicity and relevance to atomic physics. The accurate determination of the energy levels of the hydrogen atom is of paramount importance for various applications in physics and chemistry. Hence, the objective of this work is to solve the fourth-order generalized Schrodinger problem for the hydrogen atom using the Frobenius series application. Findings obtained demonstrate the effectiveness and efficiency in determining the energies of the hydrogen atom, thereby contributing to a deeper understanding of quantum mechanical systems

Taxonomic Notes on Coccolithophorids from Tomboy Field, Offshore Western Niger Delta, Nigeria

ABSTRACT The aim of this paper is to present the taxonomic notes on Coccolithophorids found in five wells in the Tomboy Field, offshore western Niger Delta area of Nigeria. Niger Delta lies between latitudes 4° and 6° N and longitudes 3° and 9° E in the south-south geo-political region of Nigeria. Ditch cutting samples collected from five wells at the industry standard of 9.14 m depth intervals were subjected to the pipette and smear laboratory technique to prepare them for microscopic assessment for coccoliths. The Coccolithophorids (coccoliths) present in the samples were identified and their taxonomic notes were written in line with the International Code for Botanical Nomenclature