Trace and rare earth elements were studied by TXRF and ICP-MS in about 12 oil samples obtained fr... more Trace and rare earth elements were studied by TXRF and ICP-MS in about 12 oil samples obtained from the Niger Delta basin. The distribution patterns of these elements in different oil samples show that, the distributions of trace and rare elements are different in these samples. The finger printing obtained makes another unique geochemical signature of different oil types. Another significant feature of finger printing of trace and rare elements in oil samples is that, it is cheaper to obtain as compared with GC finger printing of oils.
Reconnaissance stream sediment geochemical studies were carried out in Telemu-Awo-Ede areas of Os... more Reconnaissance stream sediment geochemical studies were carried out in Telemu-Awo-Ede areas of Osun State to determine the concentrations and distribution patterns of trace elements. This was with a view to assessing the mineralization potential of the study area. Ninety six active stream sediments were collected from stream channels in Telemu-Awo-Ede. The samples were air-dried and sieved. One gram each of the minus 177 micron fraction was subjected to hot acid extraction with aqua regia (3 HCl: 1 HNO 3) and perchloric acid (HClO 4) in ratio 2:1. The aliquots were analyzed for Mo, Co,
This study was an attempt at a geostatistical estimation and quantification of two Upper Cretaceo... more This study was an attempt at a geostatistical estimation and quantification of two Upper Cretaceous tar-bearing horizons X and Y from forty boreholes as against the conventional, non-spatial estimation methods that were used to estimate the reserves by previous authors. This is with a view to possibly obtaining a reliable, unbiased assessment of the bitumen reserves in the study area. The geologic continuity in the depth, thickness and dry tar concentration from the horizons were quantified using exponential variogram models and gridded using the ordinary kriging algorithm. The gridding allowed for estimation of the modelled properties at 2800 points making up 2673 squares (sub-areas) of approximately 150 x 150 m 2 each. The estimated parameters were used to obtain the total mineable tar sand (TMT) in metric tonnes, bitumen-in-place (BIP) and probable recoverable reserves (pRRE) in barrels at 10%, 25%, 50%, 75%, 85% and 90% recovery factors (RF). The TMT for the X and Y horizons is ...
Total reflection X-ray fluorescence (TXRF) analytical technique was used to determine the element... more Total reflection X-ray fluorescence (TXRF) analytical technique was used to determine the elemental composition of Southwestern Nigeria oil sands. Twelve elements: K, Ca, Ti, V, Cr, Mn, Fe, Ni, Cu, Zn, As, and Pb were detected and their concentrations, enrichment factors, and correlation determined. Very high enrichment factors were obtained for Cu, Zn, and As. The high enrichment factors for
Total reflection X-ray fluorescence (TXRF) analytical technique was used to determine the element... more Total reflection X-ray fluorescence (TXRF) analytical technique was used to determine the elemental composition of Southwestern Nigeria oil sands. Twelve elements: K, Ca, Ti, V, Cr, Mn, Fe, Ni, Cu, Zn, As, and Pb were detected and their concentrations, enrichment factors, and correlation determined. Very high enrichment factors were obtained for Cu, Zn, and As. The high enrichment factors for
... Tissot and Welte (1984), Ekweozor and Nwachukwu (1989), Oderinde and Olanipekun (1990 a ), Bi... more ... Tissot and Welte (1984), Ekweozor and Nwachukwu (1989), Oderinde and Olanipekun (1990 a ), Bitumen (This study). ... 173–188. [4] AF Oluwole, OI Asubiojo, JI Nwachukwu, JO Ojo, OJ Ogunsola and JA Adejumo et al.. J Radioanal Nucl Chem Articles, 168 (1993), pp. 145–152. ...
... Tissot and Welte (1984), Ekweozor and Nwachukwu (1989), Oderinde and Olanipekun (1990 a ), Bi... more ... Tissot and Welte (1984), Ekweozor and Nwachukwu (1989), Oderinde and Olanipekun (1990 a ), Bitumen (This study). ... 173–188. [4] AF Oluwole, OI Asubiojo, JI Nwachukwu, JO Ojo, OJ Ogunsola and JA Adejumo et al.. J Radioanal Nucl Chem Articles, 168 (1993), pp. 145–152. ...
Even though ground geophysical surveys (especially Induced polarization and resistivity) are appl... more Even though ground geophysical surveys (especially Induced polarization and resistivity) are applied in mineral exploration, their effectiveness in identification of mineralised zones is often enhanced by integrating other mineral exploration techniques such as remote sensing and geological investigations. Integrating different techniques helps in reducing uncertainty that is often associated with mineral exploration. The methods being integrated also depend on characteristics of mineralisation and those of host rock. In this study, geophysical survey methods (induced polarization and resistivity) were integrated with remote sensing and geological methods to delineate mineralised zones in Lolgorien beyond reasonable doubt. By integrating these methods, it was found that Lolgorien’s gold and sulphide minerals (disseminated minerals) are hosted in massive quartz veins and auriferous quartz veins hosted in Banded Iron Formations. It was also found that this mineralisation was controlle...
Despite Lolgorien being one of the most active gold mining areas in Kenya, it is one of the most ... more Despite Lolgorien being one of the most active gold mining areas in Kenya, it is one of the most geologically understudied areas. To the best knowledge of the authors, Lolgorien geological map was last updated in the 1940s. Current technologies such as remote sensing allow new structural features such as faults to be easily identified. In this regard, this study employed remote sensed data to map structural features found in and around Lolgorien Subcounty, Narok, Kenya. This was done to identify any new structural features that might have been missed in the past. Shuttle Radar 152 Topography Mission Digital Elevation Model (SRTM-DEM) image was downloaded and analysed using hillshade technique. From this analysis, the research identified new structural features which were not included in the current geological map but exist on the ground. One such structural feature (fault) is located approximately at 9866237, 703601 (Universal Transverse Mercator, UTM coordinates) and trends in NW–S...
... 3.1 Quality assurance. The results of the analysis of the IAEA Standard Reference Soil (Soil ... more ... 3.1 Quality assurance. The results of the analysis of the IAEA Standard Reference Soil (Soil 7) are presented in table 1 alongside the certified values for the reference soil. ... 1991. Guidelines and Standards for Environmental Pollution Control in Nigeria , Vol. ...
The growing awareness of internet based information resources has made students to reduce their u... more The growing awareness of internet based information resources has made students to reduce their use of the physical library in which university has invested huge financial resources for nation building. Past research efforts on the use of library have mostly focused on the generality of students without localised study on a particular set of students. This paper therefore looked at whether graduate students of agricultural economics still use the physical library in the face of the growing efforts of promoting agricultural study and production in Nigeria. The factors that affect the length of time students spend in the library were also established. Simple random sampling was used to select 60 graduate students during the 2010/2011 academic session in Agricultural Economics Department, University of Ibadan. The students were administered with structured questionnaire and 57 were successful for analysis. Majority of the respondents were female while 47.37 per cent was single. Majority of the students visit the university, faculty department and outside library occasionally while 73.68 per cent are of full time mode of study. Almost all the students, 96.49 per cent use internet based library. The tobit regression revealed that full-time mode of study, increase in weekly financial allowance on study, membership of registered group off-and on-campus encourages students to spend more hours in the library. Full-time mode of study should be encouraged among the graduate students while the library should be equipped with adequate and reliable internet facilities and personal computers to encourage students' visit and use of the library towards the promotion of agricultural scholarship for food sufficiency which is a valid aim of agricultural development and nation building.
An assessment of health implications of natural radioactivity in the tar sand deposit of Ondo Sta... more An assessment of health implications of natural radioactivity in the tar sand deposit of Ondo State, southwestern Nigeria.
... 3.1 Quality assurance. The results of the analysis of the IAEA Standard Reference Soil (Soil ... more ... 3.1 Quality assurance. The results of the analysis of the IAEA Standard Reference Soil (Soil 7) are presented in table 1 alongside the certified values for the reference soil. ... 1991. Guidelines and Standards for Environmental Pollution Control in Nigeria , Vol. ...
This study was an attempt at a geostatistical estimation and quantification of two Upper Cretaceo... more This study was an attempt at a geostatistical estimation and quantification of two Upper Cretaceous tar-bearing horizons X and Y from forty boreholes as against the conventional, non-spatial estimation methods that were used to estimate the reserves by previous authors. This is with a view to possibly obtaining a reliable, unbiased assessment of the bitumen reserves in the study area. The geologic continuity in the depth, thickness and dry tar concentration from the horizons were quantified using exponential variogram models and gridded using the ordinary kriging algorithm. The gridding allowed for estimation of the modelled properties at 2800 points making up 2673 squares (sub-areas) of approximately 150 x 150 m 2 each. The estimated parameters were used to obtain the total mineable tar sand (TMT) in metric tonnes, bitumen-in-place (BIP) and probable recoverable reserves (pRRE) in barrels at 10%, 25%, 50%, 75%, 85% and 90% recovery factors (RF).
Trace and rare earth elements were studied by TXRF and ICP-MS in about 12 oil samples obtained fr... more Trace and rare earth elements were studied by TXRF and ICP-MS in about 12 oil samples obtained from the Niger Delta basin. The distribution patterns of these elements in different oil samples show that, the distributions of trace and rare elements are different in these samples. The finger printing obtained makes another unique geochemical signature of different oil types. Another significant feature of finger printing of trace and rare elements in oil samples is that, it is cheaper to obtain as compared with GC finger printing of oils.
Reconnaissance stream sediment geochemical studies were carried out in Telemu-Awo-Ede areas of Os... more Reconnaissance stream sediment geochemical studies were carried out in Telemu-Awo-Ede areas of Osun State to determine the concentrations and distribution patterns of trace elements. This was with a view to assessing the mineralization potential of the study area. Ninety six active stream sediments were collected from stream channels in Telemu-Awo-Ede. The samples were air-dried and sieved. One gram each of the minus 177 micron fraction was subjected to hot acid extraction with aqua regia (3 HCl: 1 HNO 3) and perchloric acid (HClO 4) in ratio 2:1. The aliquots were analyzed for Mo, Co,
This study was an attempt at a geostatistical estimation and quantification of two Upper Cretaceo... more This study was an attempt at a geostatistical estimation and quantification of two Upper Cretaceous tar-bearing horizons X and Y from forty boreholes as against the conventional, non-spatial estimation methods that were used to estimate the reserves by previous authors. This is with a view to possibly obtaining a reliable, unbiased assessment of the bitumen reserves in the study area. The geologic continuity in the depth, thickness and dry tar concentration from the horizons were quantified using exponential variogram models and gridded using the ordinary kriging algorithm. The gridding allowed for estimation of the modelled properties at 2800 points making up 2673 squares (sub-areas) of approximately 150 x 150 m 2 each. The estimated parameters were used to obtain the total mineable tar sand (TMT) in metric tonnes, bitumen-in-place (BIP) and probable recoverable reserves (pRRE) in barrels at 10%, 25%, 50%, 75%, 85% and 90% recovery factors (RF). The TMT for the X and Y horizons is ...
Total reflection X-ray fluorescence (TXRF) analytical technique was used to determine the element... more Total reflection X-ray fluorescence (TXRF) analytical technique was used to determine the elemental composition of Southwestern Nigeria oil sands. Twelve elements: K, Ca, Ti, V, Cr, Mn, Fe, Ni, Cu, Zn, As, and Pb were detected and their concentrations, enrichment factors, and correlation determined. Very high enrichment factors were obtained for Cu, Zn, and As. The high enrichment factors for
Total reflection X-ray fluorescence (TXRF) analytical technique was used to determine the element... more Total reflection X-ray fluorescence (TXRF) analytical technique was used to determine the elemental composition of Southwestern Nigeria oil sands. Twelve elements: K, Ca, Ti, V, Cr, Mn, Fe, Ni, Cu, Zn, As, and Pb were detected and their concentrations, enrichment factors, and correlation determined. Very high enrichment factors were obtained for Cu, Zn, and As. The high enrichment factors for
... Tissot and Welte (1984), Ekweozor and Nwachukwu (1989), Oderinde and Olanipekun (1990 a ), Bi... more ... Tissot and Welte (1984), Ekweozor and Nwachukwu (1989), Oderinde and Olanipekun (1990 a ), Bitumen (This study). ... 173–188. [4] AF Oluwole, OI Asubiojo, JI Nwachukwu, JO Ojo, OJ Ogunsola and JA Adejumo et al.. J Radioanal Nucl Chem Articles, 168 (1993), pp. 145–152. ...
... Tissot and Welte (1984), Ekweozor and Nwachukwu (1989), Oderinde and Olanipekun (1990 a ), Bi... more ... Tissot and Welte (1984), Ekweozor and Nwachukwu (1989), Oderinde and Olanipekun (1990 a ), Bitumen (This study). ... 173–188. [4] AF Oluwole, OI Asubiojo, JI Nwachukwu, JO Ojo, OJ Ogunsola and JA Adejumo et al.. J Radioanal Nucl Chem Articles, 168 (1993), pp. 145–152. ...
Even though ground geophysical surveys (especially Induced polarization and resistivity) are appl... more Even though ground geophysical surveys (especially Induced polarization and resistivity) are applied in mineral exploration, their effectiveness in identification of mineralised zones is often enhanced by integrating other mineral exploration techniques such as remote sensing and geological investigations. Integrating different techniques helps in reducing uncertainty that is often associated with mineral exploration. The methods being integrated also depend on characteristics of mineralisation and those of host rock. In this study, geophysical survey methods (induced polarization and resistivity) were integrated with remote sensing and geological methods to delineate mineralised zones in Lolgorien beyond reasonable doubt. By integrating these methods, it was found that Lolgorien’s gold and sulphide minerals (disseminated minerals) are hosted in massive quartz veins and auriferous quartz veins hosted in Banded Iron Formations. It was also found that this mineralisation was controlle...
Despite Lolgorien being one of the most active gold mining areas in Kenya, it is one of the most ... more Despite Lolgorien being one of the most active gold mining areas in Kenya, it is one of the most geologically understudied areas. To the best knowledge of the authors, Lolgorien geological map was last updated in the 1940s. Current technologies such as remote sensing allow new structural features such as faults to be easily identified. In this regard, this study employed remote sensed data to map structural features found in and around Lolgorien Subcounty, Narok, Kenya. This was done to identify any new structural features that might have been missed in the past. Shuttle Radar 152 Topography Mission Digital Elevation Model (SRTM-DEM) image was downloaded and analysed using hillshade technique. From this analysis, the research identified new structural features which were not included in the current geological map but exist on the ground. One such structural feature (fault) is located approximately at 9866237, 703601 (Universal Transverse Mercator, UTM coordinates) and trends in NW–S...
... 3.1 Quality assurance. The results of the analysis of the IAEA Standard Reference Soil (Soil ... more ... 3.1 Quality assurance. The results of the analysis of the IAEA Standard Reference Soil (Soil 7) are presented in table 1 alongside the certified values for the reference soil. ... 1991. Guidelines and Standards for Environmental Pollution Control in Nigeria , Vol. ...
The growing awareness of internet based information resources has made students to reduce their u... more The growing awareness of internet based information resources has made students to reduce their use of the physical library in which university has invested huge financial resources for nation building. Past research efforts on the use of library have mostly focused on the generality of students without localised study on a particular set of students. This paper therefore looked at whether graduate students of agricultural economics still use the physical library in the face of the growing efforts of promoting agricultural study and production in Nigeria. The factors that affect the length of time students spend in the library were also established. Simple random sampling was used to select 60 graduate students during the 2010/2011 academic session in Agricultural Economics Department, University of Ibadan. The students were administered with structured questionnaire and 57 were successful for analysis. Majority of the respondents were female while 47.37 per cent was single. Majority of the students visit the university, faculty department and outside library occasionally while 73.68 per cent are of full time mode of study. Almost all the students, 96.49 per cent use internet based library. The tobit regression revealed that full-time mode of study, increase in weekly financial allowance on study, membership of registered group off-and on-campus encourages students to spend more hours in the library. Full-time mode of study should be encouraged among the graduate students while the library should be equipped with adequate and reliable internet facilities and personal computers to encourage students' visit and use of the library towards the promotion of agricultural scholarship for food sufficiency which is a valid aim of agricultural development and nation building.
An assessment of health implications of natural radioactivity in the tar sand deposit of Ondo Sta... more An assessment of health implications of natural radioactivity in the tar sand deposit of Ondo State, southwestern Nigeria.
... 3.1 Quality assurance. The results of the analysis of the IAEA Standard Reference Soil (Soil ... more ... 3.1 Quality assurance. The results of the analysis of the IAEA Standard Reference Soil (Soil 7) are presented in table 1 alongside the certified values for the reference soil. ... 1991. Guidelines and Standards for Environmental Pollution Control in Nigeria , Vol. ...
This study was an attempt at a geostatistical estimation and quantification of two Upper Cretaceo... more This study was an attempt at a geostatistical estimation and quantification of two Upper Cretaceous tar-bearing horizons X and Y from forty boreholes as against the conventional, non-spatial estimation methods that were used to estimate the reserves by previous authors. This is with a view to possibly obtaining a reliable, unbiased assessment of the bitumen reserves in the study area. The geologic continuity in the depth, thickness and dry tar concentration from the horizons were quantified using exponential variogram models and gridded using the ordinary kriging algorithm. The gridding allowed for estimation of the modelled properties at 2800 points making up 2673 squares (sub-areas) of approximately 150 x 150 m 2 each. The estimated parameters were used to obtain the total mineable tar sand (TMT) in metric tonnes, bitumen-in-place (BIP) and probable recoverable reserves (pRRE) in barrels at 10%, 25%, 50%, 75%, 85% and 90% recovery factors (RF).
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