Pub Date : 2018-08-10DOI: 10.14419/IJAG.V6I2.13475
O. Oluwajana, A. Ogunyele, J. Egunjobi, A. Ajayi
Subsurface mapping of a marble deposit around Igarra and geochemical analysis of seven marble samples collected at different depths in four drill holes were carried out with the aim of determining the chemical compositions and economic viabilities of the deposit. Subsurface mapping and lithologic description revealed that snow-white and grey to dark grey marble layers occur in the four drill holes. Results of the geochemical analysis show that the CaO and MgO contents of the snow-white marble samples retrieved from depths between 10 m and 20 m (43.90-48.90 wt. % and 0.19-2.35 wt. % respectively) reflected calcitic to fairly dolomitic nature of the marble samples. This is confirmed by the high CaCO3 (91.65-95.75 wt. %) content of the samples. Grey to dark grey marble samples taken from depths between 30 m and 48 m have moderately high CaO contents (44.00-52.60 wt. %) and significantly high MgO contents (3.50-8.70 wt. %) which makes them highly dolomitic and impure. The pure, calcitic to fairly dolomitic marble is considered suitable as raw material for Portland cement production, flux in steel making and for paper production while the impure, dolomitic marble is suitable for making dimension stones and structural wares for landscaping purpose.
{"title":"Subsurface mapping and geochemical investigation of a marble deposit around Igarra, Southwestern Nigeria","authors":"O. Oluwajana, A. Ogunyele, J. Egunjobi, A. Ajayi","doi":"10.14419/IJAG.V6I2.13475","DOIUrl":"https://doi.org/10.14419/IJAG.V6I2.13475","url":null,"abstract":"Subsurface mapping of a marble deposit around Igarra and geochemical analysis of seven marble samples collected at different depths in four drill holes were carried out with the aim of determining the chemical compositions and economic viabilities of the deposit. Subsurface mapping and lithologic description revealed that snow-white and grey to dark grey marble layers occur in the four drill holes. Results of the geochemical analysis show that the CaO and MgO contents of the snow-white marble samples retrieved from depths between 10 m and 20 m (43.90-48.90 wt. % and 0.19-2.35 wt. % respectively) reflected calcitic to fairly dolomitic nature of the marble samples. This is confirmed by the high CaCO3 (91.65-95.75 wt. %) content of the samples. Grey to dark grey marble samples taken from depths between 30 m and 48 m have moderately high CaO contents (44.00-52.60 wt. %) and significantly high MgO contents (3.50-8.70 wt. %) which makes them highly dolomitic and impure. The pure, calcitic to fairly dolomitic marble is considered suitable as raw material for Portland cement production, flux in steel making and for paper production while the impure, dolomitic marble is suitable for making dimension stones and structural wares for landscaping purpose.","PeriodicalId":424421,"journal":{"name":"International Journal of Advanced Geosciences","volume":"159 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-08-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116205669","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2018-08-04DOI: 10.14419/IJAG.V6I2.13742
Ram Proshad, M. Islam, Tapos Kormoker, Md Abdul Kaium Masud, M. Ali
Toxic metal contamination is a major problem globally, especially in developing countries. In this study, the levels of toxic metals such as Cr, Ni, Cu, As, Cd and Pb in surface water and sediment of Korotoa River of Bogra City, Bangladesh were investigated. The average concentration of Cr, Ni, Cu, As, Cd and Pb in studied sediment were 1.01, 0.89, 1.98, 6.02, 0.0054 and 0.469 mg/kg, respectively. In the water sample, the mean concentration of Cr, Ni, Cu, As, Cd and Pb were 1.13, 1.33, 3.02, 2.62, 0.75 and 0.81 mg/kg, respectively. A huge amount of municipal wastes, industrial effluents and agricultural runoff from the periphery of Bogra City notably are dumped to this river. Most of the effluents channeled into these rivers are not treated. Considering the sampling sites, the decreasing order of total metal concentration in water samples were Cu > As > Ni > Cr > Pb > Cd and in sediment were As > Cu > Cr> Ni > Pb > Cd. Total average concentrations of Cr, Ni, Cu, As, Cd and Pb in the water samples were higher than WHO guidelines for drinking water quality. This contamination level implied that the condition is much frightening and probably severely affecting the aquatic ecology of the river.
有毒金属污染是一个全球性的主要问题，特别是在发展中国家。本研究调查了孟加拉国Bogra市Korotoa河地表水和沉积物中Cr、Ni、Cu、as、Cd和Pb等有毒金属的含量。研究沉积物中Cr、Ni、Cu、As、Cd和Pb的平均浓度分别为1.01、0.89、1.98、6.02、0.0054和0.469 mg/kg。水样中Cr、Ni、Cu、As、Cd和Pb的平均浓度分别为1.13、1.33、3.02、2.62、0.75和0.81 mg/kg。博格拉市周边的大量城市垃圾、工业废水和农业径流被倾倒到这条河中。流入这些河流的大部分污水都没有经过处理。从采样地点来看，水样中总金属浓度的降序为Cu > As > Ni > Cr> Pb > Cd，沉积物中总金属浓度的降序为As > Cu > Cr> Ni > Pb > Cd。水样中Cr、Ni、Cu、As、Cd和Pb的总平均浓度均高于WHO饮用水水质标准。这种污染程度表明情况非常可怕，可能会严重影响河流的水生生态。
{"title":"Assessment of toxic metal contamination with ecological risk of surface water and sediment of Korotoa River in Bangladesh","authors":"Ram Proshad, M. Islam, Tapos Kormoker, Md Abdul Kaium Masud, M. Ali","doi":"10.14419/IJAG.V6I2.13742","DOIUrl":"https://doi.org/10.14419/IJAG.V6I2.13742","url":null,"abstract":"Toxic metal contamination is a major problem globally, especially in developing countries. In this study, the levels of toxic metals such as Cr, Ni, Cu, As, Cd and Pb in surface water and sediment of Korotoa River of Bogra City, Bangladesh were investigated. The average concentration of Cr, Ni, Cu, As, Cd and Pb in studied sediment were 1.01, 0.89, 1.98, 6.02, 0.0054 and 0.469 mg/kg, respectively. In the water sample, the mean concentration of Cr, Ni, Cu, As, Cd and Pb were 1.13, 1.33, 3.02, 2.62, 0.75 and 0.81 mg/kg, respectively. A huge amount of municipal wastes, industrial effluents and agricultural runoff from the periphery of Bogra City notably are dumped to this river. Most of the effluents channeled into these rivers are not treated. Considering the sampling sites, the decreasing order of total metal concentration in water samples were Cu > As > Ni > Cr > Pb > Cd and in sediment were As > Cu > Cr> Ni > Pb > Cd. Total average concentrations of Cr, Ni, Cu, As, Cd and Pb in the water samples were higher than WHO guidelines for drinking water quality. This contamination level implied that the condition is much frightening and probably severely affecting the aquatic ecology of the river. ","PeriodicalId":424421,"journal":{"name":"International Journal of Advanced Geosciences","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-08-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121077414","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2018-07-29DOI: 10.14419/IJAG.V6I2.13151
Mohammadali Sarparandeh, A. Hezarkhani
Principal component analysis (PCA) is a sufficient way for finding the groups of correlated features. In geochemical exploration of precious metals, it helps to cluster the elements. Especially for rare earth elements (REEs), because of multiplicity of parameters, the proposed method helps to have a better interpretation. Geochemical exploration programs aim to find the hidden information about specific element(s), its abundance, its behavior and its relation with minerals and some other elements. REEs are a group of elements with same chemical behavior. However, some chemical characteristics of light rare earth elements (LREEs) and heavy rare earth elements (HREEs) are different. In this study, relationship between these elements was investigated by applying PC analysis method in Kiruna-type iron ore deposit of Se-Chahun in Central Iran. The four first PCs covered the most variances of the REEs. All the elements showed a correlation together with exception of La, Ce, Nd, Yb and Y. Results of PC analysis are related to the anomaly of Rare earth elements. It can be concluded that in anomalous areas, loadings of the principal components are affected by variance and anomalous content of the elements.
{"title":"Principal component analysis of rare earth elements in Sechahun iron deposit, central Iran.","authors":"Mohammadali Sarparandeh, A. Hezarkhani","doi":"10.14419/IJAG.V6I2.13151","DOIUrl":"https://doi.org/10.14419/IJAG.V6I2.13151","url":null,"abstract":"Principal component analysis (PCA) is a sufficient way for finding the groups of correlated features. In geochemical exploration of precious metals, it helps to cluster the elements. Especially for rare earth elements (REEs), because of multiplicity of parameters, the proposed method helps to have a better interpretation. Geochemical exploration programs aim to find the hidden information about specific element(s), its abundance, its behavior and its relation with minerals and some other elements. REEs are a group of elements with same chemical behavior. However, some chemical characteristics of light rare earth elements (LREEs) and heavy rare earth elements (HREEs) are different. In this study, relationship between these elements was investigated by applying PC analysis method in Kiruna-type iron ore deposit of Se-Chahun in Central Iran. The four first PCs covered the most variances of the REEs. All the elements showed a correlation together with exception of La, Ce, Nd, Yb and Y. Results of PC analysis are related to the anomaly of Rare earth elements. It can be concluded that in anomalous areas, loadings of the principal components are affected by variance and anomalous content of the elements. ","PeriodicalId":424421,"journal":{"name":"International Journal of Advanced Geosciences","volume":"71 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-07-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132982582","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2018-07-28DOI: 10.14419/IJAG.V6I2.14150
D. Sivanesan, M. J. Idrisi
Agriculture depends mainly on the rainfall especially in countries like Ethiopia (Africa) as irrigation system is not much in practice. One of the main reasons is because of its natural topography. Though there are many factors that affect the agricultural yield, it is appropriate to consider the main factor rainfall that decides about the food production. The prediction of the rainfall can be done by using different techniques like regression analysis, clustering, artificial neural network (ANN) and fuzzy logic. Therefore, the significance of this research is essential for the Tepi region in the south west part of Ethiopia (SNNPR) where agriculture is the main occupation of the people living here. This research is first of its kind conducted in this region, and this paper shows the result related with the rainfall prediction by using LR – Linear Regression technique for the early prediction of the next consecutive three (3) years based on the previous available rainfall data.
农业主要依赖于降雨，特别是在像埃塞俄比亚(非洲)这样的国家，因为灌溉系统在实践中并不多。其中一个主要原因是因为它的自然地形。虽然影响农业产量的因素很多，但应该考虑决定粮食产量的主要因素是降雨。降雨的预测可以通过使用不同的技术，如回归分析、聚类、人工神经网络(ANN)和模糊逻辑来完成。因此，这项研究的意义对于埃塞俄比亚西南部的特皮地区(SNNPR)是至关重要的，因为农业是生活在这里的人们的主要职业。本研究在该地区尚属首次，本文基于已有降水资料，利用LR - Linear Regression技术对未来连续三年的降水进行早期预测，结果与降雨预测相关。
{"title":"Data mining techniques for rainfall prediction in the Tepi region of Ethiopia","authors":"D. Sivanesan, M. J. Idrisi","doi":"10.14419/IJAG.V6I2.14150","DOIUrl":"https://doi.org/10.14419/IJAG.V6I2.14150","url":null,"abstract":"Agriculture depends mainly on the rainfall especially in countries like Ethiopia (Africa) as irrigation system is not much in practice. One of the main reasons is because of its natural topography. Though there are many factors that affect the agricultural yield, it is appropriate to consider the main factor rainfall that decides about the food production. The prediction of the rainfall can be done by using different techniques like regression analysis, clustering, artificial neural network (ANN) and fuzzy logic. Therefore, the significance of this research is essential for the Tepi region in the south west part of Ethiopia (SNNPR) where agriculture is the main occupation of the people living here. This research is first of its kind conducted in this region, and this paper shows the result related with the rainfall prediction by using LR – Linear Regression technique for the early prediction of the next consecutive three (3) years based on the previous available rainfall data. ","PeriodicalId":424421,"journal":{"name":"International Journal of Advanced Geosciences","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-07-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131335224","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2018-07-28DOI: 10.14419/IJAG.V6I2.13687
E. Menegbo, J. C. Ojiako
This work aims at geospatial mapping of healthcare facilities in Obio/Akpor LGA in Rivers State. The objectives are to acquire primary and secondary data sets within the study area, to create a functional spatial database on health facilities, and to perform various spatial and attrib-ute query that will aid the mapping of healthcare facilities. Primary data for healthcare facilities location was acquired with Global Positional Systems (GPS) receiver. Google earth Pro Satellite imagery was used. Secondary data was obtained from relevant government agency. ArcGIS 10 version software was used for data processing and analysis. Various spatial and attribute queries was formulated for geospatial mapping of healthcare facilities. The results show the distribution of health facilities within the study area on a digital map in form of maps and tabular data among others. Results obtained show that 10 healthcare facilities have least at 10000 populations. Four facilities were found to have no medical doctor. Two healthcare facilities were found to be located in ward 14. Fourteen healthcare facilities were found to have at least total of 10 personnel, the highest personnel per facilities and a total of 16 healthcare facilities were distributed all over the study area. A total of 37 settlements were distributed all over the study area. Over 21 settlements are left out of the service areas of 1km. PHC Ru-muokwuta and St Jude Hospital Rumuokoro have least healthcare personnel of 6 and 5 respectively. 10 healthcare facilities have at least 10000 populations to physician ratio standard recommended by World Health Organization (WHO). The creation of Geospatial health in-formation systems is useful in data collection and management of healthcare facilities within the study area and Nigeria in general.
{"title":"Geospatial mapping and analysis of public health care facilities in OBIO/AKPOR LGA, rivers state, Nigeria","authors":"E. Menegbo, J. C. Ojiako","doi":"10.14419/IJAG.V6I2.13687","DOIUrl":"https://doi.org/10.14419/IJAG.V6I2.13687","url":null,"abstract":"This work aims at geospatial mapping of healthcare facilities in Obio/Akpor LGA in Rivers State. The objectives are to acquire primary and secondary data sets within the study area, to create a functional spatial database on health facilities, and to perform various spatial and attrib-ute query that will aid the mapping of healthcare facilities. Primary data for healthcare facilities location was acquired with Global Positional Systems (GPS) receiver. Google earth Pro Satellite imagery was used. Secondary data was obtained from relevant government agency. ArcGIS 10 version software was used for data processing and analysis. Various spatial and attribute queries was formulated for geospatial mapping of healthcare facilities. The results show the distribution of health facilities within the study area on a digital map in form of maps and tabular data among others. Results obtained show that 10 healthcare facilities have least at 10000 populations. Four facilities were found to have no medical doctor. Two healthcare facilities were found to be located in ward 14. Fourteen healthcare facilities were found to have at least total of 10 personnel, the highest personnel per facilities and a total of 16 healthcare facilities were distributed all over the study area. A total of 37 settlements were distributed all over the study area. Over 21 settlements are left out of the service areas of 1km. PHC Ru-muokwuta and St Jude Hospital Rumuokoro have least healthcare personnel of 6 and 5 respectively. 10 healthcare facilities have at least 10000 populations to physician ratio standard recommended by World Health Organization (WHO). The creation of Geospatial health in-formation systems is useful in data collection and management of healthcare facilities within the study area and Nigeria in general. ","PeriodicalId":424421,"journal":{"name":"International Journal of Advanced Geosciences","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-07-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115341041","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2018-07-26DOI: 10.14419/IJAG.V6I2.13505
A KagouDongmo, .S GuedjeoC, Primus A.T, P. Wotchoko, C. M.L, Aziwo B.T, Kamgang K.V
The weathering mechanism of rocks exposed under the same conditions on the Bamenda Mountain is not well understood. The aim of this study is to characterize basalt, trachyte and rhyolite and their products on the geochemical and geotechnical aspect. Here three wells were hand dug on rocks developed on basalt, trachyte and rhyolite and studied. The results showed that, Ki values (0.34-6.57) indicate SiO2 are more leached on soils developed on basalt than those on trachyte and rhyolite. CIA (72.62-97.8) and CIW (72.76-98.8) indicate an advanced to extreme chemical weathering in this environment, with rhyolite and trachyte more weathered than basalts. Soils formed on basalt have ICV >1 signifying they are young and immature, while those on trachyte and rhyolite ICV =0.3-0.5 indicate intense chemical weathering. Al (EFAl=1.5) and Fe (EFFe=1.3) are enriched in the soils and while SiO2, Na, K, Ca and Mg are depleted in the soils profile as one moves upward. Geotechnically, these soils are predominantly silts, well graded, less plastic (LI<0), plastic (CI>1) to moderately plastic (PI=7.2-15.8). Soils developed on rhyolite have high clay content MBV= 3.3-8, but low water content (10-42%). Texturally, these soil are silty loam, loam to sandy loam soils. Soil strength of the soils is low: cohesion (<0.5bar), angle of internal friction (10-43°), with shallow landslides (1-2m) more likely to occur on trachyte and on rhyolites.
{"title":"Geochemical and geotechnical characterization of soils developed on volcanic rocks on the Bamenda mountain (Cameroon volcanic line)","authors":"A KagouDongmo, .S GuedjeoC, Primus A.T, P. Wotchoko, C. M.L, Aziwo B.T, Kamgang K.V","doi":"10.14419/IJAG.V6I2.13505","DOIUrl":"https://doi.org/10.14419/IJAG.V6I2.13505","url":null,"abstract":"The weathering mechanism of rocks exposed under the same conditions on the Bamenda Mountain is not well understood. The aim of this study is to characterize basalt, trachyte and rhyolite and their products on the geochemical and geotechnical aspect. Here three wells were hand dug on rocks developed on basalt, trachyte and rhyolite and studied. The results showed that, Ki values (0.34-6.57) indicate SiO2 are more leached on soils developed on basalt than those on trachyte and rhyolite. CIA (72.62-97.8) and CIW (72.76-98.8) indicate an advanced to extreme chemical weathering in this environment, with rhyolite and trachyte more weathered than basalts. Soils formed on basalt have ICV >1 signifying they are young and immature, while those on trachyte and rhyolite ICV =0.3-0.5 indicate intense chemical weathering. Al (EFAl=1.5) and Fe (EFFe=1.3) are enriched in the soils and while SiO2, Na, K, Ca and Mg are depleted in the soils profile as one moves upward. Geotechnically, these soils are predominantly silts, well graded, less plastic (LI<0), plastic (CI>1) to moderately plastic (PI=7.2-15.8). Soils developed on rhyolite have high clay content MBV= 3.3-8, but low water content (10-42%). Texturally, these soil are silty loam, loam to sandy loam soils. Soil strength of the soils is low: cohesion (<0.5bar), angle of internal friction (10-43°), with shallow landslides (1-2m) more likely to occur on trachyte and on rhyolites. ","PeriodicalId":424421,"journal":{"name":"International Journal of Advanced Geosciences","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-07-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121858171","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2018-07-23DOI: 10.14419/IJAG.V6I2.12660
Umar, Nuhu Degree, Idris, I. Giza, Abdullahi Aliyu Itari
The role of climate variation on groundwater level and its geotechnical implication was studied. Static water levels (SWL) and elevations of 57 dug wells and boreholes were measured during dry and wet seasons. The differences between the SWL for dry and wet season was used to establish the depth of groundwater fluctuation, while geophysical investigation was conducted to delineate the subsurface geo-electric layers. This information is vital for groundwater assessment and evaluation, however, this research is biased towards its geotechnical implications. SWL varied between 5.5 – 13 and 2.2 - 9.2 meters below sea level (mbsl), while groundwater elevation ranges from 131.8 – 157.2 and 136-160 meters above sea level (masl) for dry and wet seasons respectively. The depth of fluctuation (active zone) lies between 1.1 – 5.9 mbsl. The wells showed a direct rapid response to short term seasonal precipitation attributable to climate variation, which implies a shallow aquifer. Groundwater flows from the northern parts towards the southern parts. Foundations in the study area are underlain by sandy-clays, clays and sands as revealed by geophysical investigations. Engineering structures with shallow foundation may be prone to shrink-swell behavior, and should be laid beyond active zone.
{"title":"Groundwater Level Fluctuation in Response to Climatic Variation and its Geotechnical Implication in Part of Awgu Shale, Central Benue Trough, Nigeria","authors":"Umar, Nuhu Degree, Idris, I. Giza, Abdullahi Aliyu Itari","doi":"10.14419/IJAG.V6I2.12660","DOIUrl":"https://doi.org/10.14419/IJAG.V6I2.12660","url":null,"abstract":"The role of climate variation on groundwater level and its geotechnical implication was studied. Static water levels (SWL) and elevations of 57 dug wells and boreholes were measured during dry and wet seasons. The differences between the SWL for dry and wet season was used to establish the depth of groundwater fluctuation, while geophysical investigation was conducted to delineate the subsurface geo-electric layers. This information is vital for groundwater assessment and evaluation, however, this research is biased towards its geotechnical implications. SWL varied between 5.5 – 13 and 2.2 - 9.2 meters below sea level (mbsl), while groundwater elevation ranges from 131.8 – 157.2 and 136-160 meters above sea level (masl) for dry and wet seasons respectively. The depth of fluctuation (active zone) lies between 1.1 – 5.9 mbsl. The wells showed a direct rapid response to short term seasonal precipitation attributable to climate variation, which implies a shallow aquifer. Groundwater flows from the northern parts towards the southern parts. Foundations in the study area are underlain by sandy-clays, clays and sands as revealed by geophysical investigations. Engineering structures with shallow foundation may be prone to shrink-swell behavior, and should be laid beyond active zone. ","PeriodicalId":424421,"journal":{"name":"International Journal of Advanced Geosciences","volume":"83 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-07-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115203297","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2018-06-27DOI: 10.14419/IJAG.V6I1.10738
Fadimatou Ngounouno Yamgouot, Isaac Bertrand Gbambié Mbowou, I. Ngounouno, Azizi Abdoul Youpoungam, Isaac Daama, B. Déruelle
Alkaline volcanic activities occurred in the Mt Cameroon at the ocean-continent boundary of the Cameroon Line. It is characterized by a volcanic association of alkali basalts and hawaiites extruded during the late Miocene to Recent times. The major and trace element geochemistry of the Mt Cameroon are consistent with the fractional crystallization of olivine ± clinopyroxene ± plagioclase (± amphibole). Petrographical and mineralogical study reveals the presence of xenocryts (olivine, clinopyroxene and spinel) in Mt Cameroon basalts. Their composition are similar to xenoliths and rocks crystals and they come from cumulates formed in the upper lithospheric mantle. Mt Cameroon magmas were generated near the boundary of garnet and spinel mantle stability domains (60–75 km depth), at the base of the lithospheric mantle that the compositions of the Mt Cameroon magmas are consistent with derivation from a infralithospheric mantle that was metasomatised by carbonatite melts. Basaltic volcanism in the Mt Cameroon occurred probably as a result of minor plume activity coupled with lithospheric extension.
{"title":"Insight into geochemistry of basaltic rocks from Mt Cameroon and characterization of the mantle source","authors":"Fadimatou Ngounouno Yamgouot, Isaac Bertrand Gbambié Mbowou, I. Ngounouno, Azizi Abdoul Youpoungam, Isaac Daama, B. Déruelle","doi":"10.14419/IJAG.V6I1.10738","DOIUrl":"https://doi.org/10.14419/IJAG.V6I1.10738","url":null,"abstract":"Alkaline volcanic activities occurred in the Mt Cameroon at the ocean-continent boundary of the Cameroon Line. It is characterized by a volcanic association of alkali basalts and hawaiites extruded during the late Miocene to Recent times. The major and trace element geochemistry of the Mt Cameroon are consistent with the fractional crystallization of olivine ± clinopyroxene ± plagioclase (± amphibole). Petrographical and mineralogical study reveals the presence of xenocryts (olivine, clinopyroxene and spinel) in Mt Cameroon basalts. Their composition are similar to xenoliths and rocks crystals and they come from cumulates formed in the upper lithospheric mantle. Mt Cameroon magmas were generated near the boundary of garnet and spinel mantle stability domains (60–75 km depth), at the base of the lithospheric mantle that the compositions of the Mt Cameroon magmas are consistent with derivation from a infralithospheric mantle that was metasomatised by carbonatite melts. Basaltic volcanism in the Mt Cameroon occurred probably as a result of minor plume activity coupled with lithospheric extension. ","PeriodicalId":424421,"journal":{"name":"International Journal of Advanced Geosciences","volume":"148 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-06-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114315154","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2018-06-05DOI: 10.14419/ijag.v6i1.11633
Irteja Hasan, Milton Shaha, S. Islam, S. Islam, Solayman, Miraz Hossen, H. Kabir
Environmental Impact Assessment (EIA) may provide a mechanism for executing sustainable development and it is also becoming a very significance revision before authorizing of any project plan. EIA helps to decision making process whether the project is beneficial or harmful effects for the environment. Both on site and off site environmental impacts can be reduced through undertaking EIA for any bridge construction activities. This paper mainly concentrates on to find out potential environmental impact during the construction, operation and maintenance phase of the project using different matrix method. It also finds out the effective mitigation measures of the adverse impacts that will be helpful for the surrounding environment. Primary data were collected from field survey, focus group discussion. Most of the impacts and other consequences are identified based on public perception and the interview of the key personnel’s. Secondary data were also collected for conducting the research. The study found that the bridge is connecting three regions (Bauphal, Patuakhali and Barisal) and it will be a great achievement for the local coastal community. This new bridge project will not only increase the communication facilities but also other facilities such as economic flow, medical facilities etc. The EIA study founds some major negative Impacts such as loss of land and resettlement, loss of aquatic habitat, loss of local trees varieties, loss of agricultural lands, loss of vegetation, potential impact on ecological resources, impact on fish migration etc. But analyzing the overall impact of the environment, the EIA study found that that the possible negative impact is not so high and the project can be implemented. Different environmental management plans are suggested for reducing the potential negative impact of the bridge construction project.
{"title":"Environmental Impact Assessment: Integrated Evaluation of Bridge Construction Project in Bangladesh","authors":"Irteja Hasan, Milton Shaha, S. Islam, S. Islam, Solayman, Miraz Hossen, H. Kabir","doi":"10.14419/ijag.v6i1.11633","DOIUrl":"https://doi.org/10.14419/ijag.v6i1.11633","url":null,"abstract":"Environmental Impact Assessment (EIA) may provide a mechanism for executing sustainable development and it is also becoming a very significance revision before authorizing of any project plan. EIA helps to decision making process whether the project is beneficial or harmful effects for the environment. Both on site and off site environmental impacts can be reduced through undertaking EIA for any bridge construction activities. This paper mainly concentrates on to find out potential environmental impact during the construction, operation and maintenance phase of the project using different matrix method. It also finds out the effective mitigation measures of the adverse impacts that will be helpful for the surrounding environment. Primary data were collected from field survey, focus group discussion. Most of the impacts and other consequences are identified based on public perception and the interview of the key personnel’s. Secondary data were also collected for conducting the research. The study found that the bridge is connecting three regions (Bauphal, Patuakhali and Barisal) and it will be a great achievement for the local coastal community. This new bridge project will not only increase the communication facilities but also other facilities such as economic flow, medical facilities etc. The EIA study founds some major negative Impacts such as loss of land and resettlement, loss of aquatic habitat, loss of local trees varieties, loss of agricultural lands, loss of vegetation, potential impact on ecological resources, impact on fish migration etc. But analyzing the overall impact of the environment, the EIA study found that that the possible negative impact is not so high and the project can be implemented. Different environmental management plans are suggested for reducing the potential negative impact of the bridge construction project.","PeriodicalId":424421,"journal":{"name":"International Journal of Advanced Geosciences","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-06-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115494774","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2018-05-30DOI: 10.14419/IJAG.V6I1.10907
J. R. Nimnu, G. Aigbadon, F. Ogbikaya
A high resolution Foraminiferal biostratigrpahic study has been carried out using data from three wells located in the Coastal and Central Swamp depobelts of Niger Delta.The study defined six (N6-N15) Foraminiferal zones for the early to middle Miocene Niger Delta on the basis of index Foraminiferal and this was correlated to Blow, 1969 and Bergreen et al., 1995. Foraminiferal analysis shows that Oshi-13Field is very rich in calcareous and araneceous benthics, calcareous and planktic foraminiferal. The abudance of fossils and index fossils are responsible for constructing the biostratigraphic chart and hydrocarbon saturation in the field. The biostratigraphy chart constructed act as a basis in establishing the ages of sediments/ sequence in the studied field.
利用位于尼日尔三角洲沿海和中部沼泽沉积带的三口井的数据进行了高分辨率有孔虫生物地层研究。根据有孔虫指数，本研究确定了中新世早至中尼日尔三角洲的6个(N6-N15)有孔虫带，并与Blow, 1969和Bergreen et al.， 1995进行了对比。有孔虫分析表明，oshi -13田具有丰富的钙质和砂质底栖动物，钙质和浮游有孔虫。化石和指示化石的丰度是构建野外生物地层图和油气饱和度的重要依据。构建的生物地层学图是确定研究区沉积物/层序年龄的基础。
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