{"title":"Direction of material creep during the deformation phase in shear zones, role in mining prospecting: A case of the Nassara-Torkera gold deposits in the Gaoua region, Burkina Faso, West Africa","authors":"Ouiya Pascal, Hubert Zongo Gounwendmanaghre, Ouedraogo Adama, Naba Seta","doi":"10.5897/jgmr2023.0384","DOIUrl":"https://doi.org/10.5897/jgmr2023.0384","url":null,"abstract":".","PeriodicalId":430415,"journal":{"name":"Journal of Geology and Mining Research","volume":"67 6","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-11-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139206977","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}
Remote sensing is used in this work as a geological reconnaissance technique, demonstrating that it is profitable and effective in providing valuable information for distant regions of mining interest. Due to the Civil War that affected Sierra Leone from 1991 to 2002, Sierra Leone's mining resurgence has focused only on restoring closed mines and the exploitation of previously proven reserves. Thus, the main objective of this work is to locate new iron ores in the districts of Marampa and Tonkolili, located in areas outside the mining licensee sites where previous exploratory studies have not been carried out. To do this, Landsat 5 TM multispectral satellite images were used. Two different spectral enhancement methodologies were applied: Colour composition with band ratios and principal component analysis (PCA) applied to band ratios. The results were integrated to generate a map that delimits areas with exposed mineralization of iron oxides, which allowed us to associate them with the regional geology. Finally, access roads are included for field checking and detailed exploration.
{"title":"Identification of iron ores in Sierra Leone, Africa by using remote sensing techniques","authors":"Diaz G., Prol-Ledesma R.M.","doi":"10.5897/jgmr2022.0377","DOIUrl":"https://doi.org/10.5897/jgmr2022.0377","url":null,"abstract":"Remote sensing is used in this work as a geological reconnaissance technique, demonstrating that it is profitable and effective in providing valuable information for distant regions of mining interest. Due to the Civil War that affected Sierra Leone from 1991 to 2002, Sierra Leone's mining resurgence has focused only on restoring closed mines and the exploitation of previously proven reserves. Thus, the main objective of this work is to locate new iron ores in the districts of Marampa and Tonkolili, located in areas outside the mining licensee sites where previous exploratory studies have not been carried out. To do this, Landsat 5 TM multispectral satellite images were used. Two different spectral enhancement methodologies were applied: Colour composition with band ratios and principal component analysis (PCA) applied to band ratios. The results were integrated to generate a map that delimits areas with exposed mineralization of iron oxides, which allowed us to associate them with the regional geology. Finally, access roads are included for field checking and detailed exploration.","PeriodicalId":430415,"journal":{"name":"Journal of Geology and Mining Research","volume":"11 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-08-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139347429","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}
The increase in population has led to indiscriminate disposal and mismanagement of waste in the society, resulting to waterborne diseases. As a result, this study was done to determine the efficacy and the efficiency of LeGrand correlation chart in the evaluation of the potential of groundwater of an area to pollution. Ebohkhuala and Agbede were used as a case study. Electrical resistivity tomography (ERT) and hydrogeochemical analysis of groundwater in the two areas were used to validate the result of the correlation chart. The LeGrand correlation chart for Ebohkhuala and Agbede total point value for pollution evaluation were 32.5 and 7, respectively. These values showed that Ebohkhuala’s groundwater cannot be contaminated by nearby dump site owing to the result of the correlation which fell within the limits of impossibility, while that of Agbede fell in high possibility. The result of Ebohkhuala’s ERT resistivity signature depicts plume, ranged from 35 to 89 Ωm. The low values indicated migration of pollution without infiltrating the groundwater. However, that of Agbede ranged from 1.8 to 56 Ωm, which suggested high plume saturation. Similarly, the result of hydrogeochemical test of the ground water showed that Ebohkhuala did not have bacteria while Agbede has high concentration. The study has shown that LeGrand correlation is very efficient and efficacious in pollution prediction.
{"title":"Application of Legrand pollution correlation in the evaluation of contaminants migration within the groundwater of Ebhoakhuala in Ekpoma and Agbede, Edo State, Nigeria","authors":"Obomheile Salufu Samuel, Ososelase Okoduwa Samuel, Nkeonye Okanigbuan Philomina, O. Chukwuka","doi":"10.5897/jgmr2021.0365","DOIUrl":"https://doi.org/10.5897/jgmr2021.0365","url":null,"abstract":"The increase in population has led to indiscriminate disposal and mismanagement of waste in the society, resulting to waterborne diseases. As a result, this study was done to determine the efficacy and the efficiency of LeGrand correlation chart in the evaluation of the potential of groundwater of an area to pollution. Ebohkhuala and Agbede were used as a case study. Electrical resistivity tomography (ERT) and hydrogeochemical analysis of groundwater in the two areas were used to validate the result of the correlation chart. The LeGrand correlation chart for Ebohkhuala and Agbede total point value for pollution evaluation were 32.5 and 7, respectively. These values showed that Ebohkhuala’s groundwater cannot be contaminated by nearby dump site owing to the result of the correlation which fell within the limits of impossibility, while that of Agbede fell in high possibility. The result of Ebohkhuala’s ERT resistivity signature depicts plume, ranged from 35 to 89 Ωm. The low values indicated migration of pollution without infiltrating the groundwater. However, that of Agbede ranged from 1.8 to 56 Ωm, which suggested high plume saturation. Similarly, the result of hydrogeochemical test of the ground water showed that Ebohkhuala did not have bacteria while Agbede has high concentration. The study has shown that LeGrand correlation is very efficient and efficacious in pollution prediction.","PeriodicalId":430415,"journal":{"name":"Journal of Geology and Mining Research","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-05-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132776290","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}
Iroakazi Kalu Kalu, Emmanuel Opeyemi, Olanrewaju Alaba Clement
Land degradation in the form of creation of massive pits, and deforestation of land are some adverse impacts associated with open pit mining activities. Benin City and its environs have witnessed a high proliferation of open pit sand and/ laterite mining activities popularly called borrow pits in recent times, with its associated environmental risk. This research is carried on five selected sand mines in Benin City to estimate the cumulative land area degraded as a result of sand mining operations, thus it determines the level of environmental damage done and quantity of material required for refilling and reclamation. The method involves the use of a GPS based geomatics technique to acquire GIS data of five selected open pit sand mines, as well as computer softwares for the analysis, and area and/volume studies. The result showed that sites A, B, C, D, and E deforested a land area of 17,923.125, 33,991.803, 36,038.761, 13,212.545, and 2,882.046 m2 respectively; while the volume of excavation created by the five sites are respectively 1,792,154.644, 4,992,730.898, 2,701,846.644, 9,878,111.857, and 134,258.932 m3. Thus, a cumulative area of 104,048 m² of land was deforested in the five sites while 19,499,102.98 m³ of excavation was cumulatively created which requires refilling and total reclamation.
{"title":"Use of computer softwares and geomatic techniques for reclamation study of environmentally degraded mined lands in Benin City, Nigeria","authors":"Iroakazi Kalu Kalu, Emmanuel Opeyemi, Olanrewaju Alaba Clement","doi":"10.5897/jgmr2021.0356","DOIUrl":"https://doi.org/10.5897/jgmr2021.0356","url":null,"abstract":"Land degradation in the form of creation of massive pits, and deforestation of land are some adverse impacts associated with open pit mining activities. Benin City and its environs have witnessed a high proliferation of open pit sand and/ laterite mining activities popularly called borrow pits in recent times, with its associated environmental risk. This research is carried on five selected sand mines in Benin City to estimate the cumulative land area degraded as a result of sand mining operations, thus it determines the level of environmental damage done and quantity of material required for refilling and reclamation. The method involves the use of a GPS based geomatics technique to acquire GIS data of five selected open pit sand mines, as well as computer softwares for the analysis, and area and/volume studies. The result showed that sites A, B, C, D, and E deforested a land area of 17,923.125, 33,991.803, 36,038.761, 13,212.545, and 2,882.046 m2 respectively; while the volume of excavation created by the five sites are respectively 1,792,154.644, 4,992,730.898, 2,701,846.644, 9,878,111.857, and 134,258.932 m3. Thus, a cumulative area of 104,048 m² of land was deforested in the five sites while 19,499,102.98 m³ of excavation was cumulatively created which requires refilling and total reclamation.","PeriodicalId":430415,"journal":{"name":"Journal of Geology and Mining Research","volume":"73 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126272242","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}
The distribution and utilization of agrogeological resources in Nigeria are discussed. These are rocks and minerals applied in agriculture. They occur in a wide variety of environments that range in age from Pre-Cambrian to Recent. The resources may be utilized to solve problems of pH, texture and structure of rocks. Limestone, dolomite and any base-rich materials like carbonatites, as well as basic and ultra basic silicate rocks could be used to correct acidity in soils. The adverse effects of soil alkalinity may be tackled by the application of suphides, for example pyrite and marcasite. Texture can be modified by adding geological materials to the soil that have contrasting grain size. Solid structure may be improved upon by providing a good nutrient base and by encouraging a buildup of organic matter. The resources could also provide essential plant nutrients which include nitrogen, phosphorus, potassium, calcium, magnesium, copper, manganese, iron, molybdenum, sulphur and boron.
{"title":"A Review of Agrogeological resources of Nigeria","authors":"C. Chukwudi","doi":"10.5897/jgmr2021.0366","DOIUrl":"https://doi.org/10.5897/jgmr2021.0366","url":null,"abstract":"The distribution and utilization of agrogeological resources in Nigeria are discussed. These are rocks and minerals applied in agriculture. They occur in a wide variety of environments that range in age from Pre-Cambrian to Recent. The resources may be utilized to solve problems of pH, texture and structure of rocks. Limestone, dolomite and any base-rich materials like carbonatites, as well as basic and ultra basic silicate rocks could be used to correct acidity in soils. The adverse effects of soil alkalinity may be tackled by the application of suphides, for example pyrite and marcasite. Texture can be modified by adding geological materials to the soil that have contrasting grain size. Solid structure may be improved upon by providing a good nutrient base and by encouraging a buildup of organic matter. The resources could also provide essential plant nutrients which include nitrogen, phosphorus, potassium, calcium, magnesium, copper, manganese, iron, molybdenum, sulphur and boron.","PeriodicalId":430415,"journal":{"name":"Journal of Geology and Mining Research","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-10-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124294611","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}
Yolo lead-zinc mining district is an important area in Gongola Sub-basin of the Upper Benue Trough with paucity of rocks outcrops but abundant termite mounds. The termite mounds and their adjoining surface soils were analyzed for Pb, Zn, Ti, Cu, Sb, As, U, Cr, Zr and Li in an attempt to test their effectiveness in defining favorable areas for lead-Zinc mineralization in the Upper Benue Trough. The result shows a general trend of higher elemental concentration in termite mounds relative to their adjoining surface soils. The ore elements Pb, Zn together with Ti have the highest average concentrations of 503, 2136.5, and 6285 ppb in termite mounds compared to 356, 1662 and 2250 ppb respectively in adjoining surface soils. Biological Absorption Coefficient, calculated to evaluate their degree of concentration, shows 141 values of Biological Absorption Coefficient within enrichment category with only 59 values in the depletion category. The relatively high concentration of the ore elements Pb, Zn and the associated trace elements in termite mounds and the elevated contents of BAC values in the enrichment category together suggest that Pb, Zn and Ti in termite mounds can be effectively used for lead-zinc exploration in the Upper Benue Trough. Key words: Lead-Zinc, termite mound, Gongola Sub-basin, Upper Benue Trough.
{"title":"Geochemistry of termite mounds in the sediment-hosted Lead-Zinc Mining District of Yolo, Gongola Sub-basin: A guide for lead-zinc exploration in the Upper Benue Trough, Nigeria","authors":"I. Haruna, H. Ahmed, B. Suleiman","doi":"10.5897/JGMR2020.0348","DOIUrl":"https://doi.org/10.5897/JGMR2020.0348","url":null,"abstract":"Yolo lead-zinc mining district is an important area in Gongola Sub-basin of the Upper Benue Trough with paucity of rocks outcrops but abundant termite mounds. The termite mounds and their adjoining surface soils were analyzed for Pb, Zn, Ti, Cu, Sb, As, U, Cr, Zr and Li in an attempt to test their effectiveness in defining favorable areas for lead-Zinc mineralization in the Upper Benue Trough. The result shows a general trend of higher elemental concentration in termite mounds relative to their adjoining surface soils. The ore elements Pb, Zn together with Ti have the highest average concentrations of 503, 2136.5, and 6285 ppb in termite mounds compared to 356, 1662 and 2250 ppb respectively in adjoining surface soils. Biological Absorption Coefficient, calculated to evaluate their degree of concentration, shows 141 values of Biological Absorption Coefficient within enrichment category with only 59 values in the depletion category. The relatively high concentration of the ore elements Pb, Zn and the associated trace elements in termite mounds and the elevated contents of BAC values in the enrichment category together suggest that Pb, Zn and Ti in termite mounds can be effectively used for lead-zinc exploration in the Upper Benue Trough. \u0000 \u0000 Key words: Lead-Zinc, termite mound, Gongola Sub-basin, Upper Benue Trough.","PeriodicalId":430415,"journal":{"name":"Journal of Geology and Mining Research","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-02-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130991413","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}
Laser Ablation Inductively Coupled Plasma Mass Spectrometry (LA-ICP-MS) count per seconds (cps) results were tested for quantification, using the same spot analyses of Electron Microprobe Analyses (EMP) in weight percentage (wt. %); they were obtained from selected pyrite grains from Sheba, New Consort, and Fairview gold mines of the Barberton Greenstone Belt (BGB). Theoretically, data obtained from the same pyrite grains, using two different techniques must represent, to some extent, the same chemical composition, but not exclusively the same values. This comes because they applied to the same spots, and within the same pyrite grains. Yet, the results obtained in this study of the two techniques are not directly comparable. Graphical and statistical techniques were also applied to depict any existing relationships. However, all do not indicate any kind of similarity in the distribution of major or trace-elements in the pyrite of both datasets. The results of this study imply that the obvious correlations between data of the two techniques for matching spots are failed by several factors (spot size, zoning, heterogeneity, etc.), which are negatively influencing any direct standardization procedure of LA-ICP-MS data based on EMP results. Key words: Laser Ablation Inductively Coupled Plasma Mass Spectrometry (LA-ICP-MS), electron microprobe, Barberton greenstone belt, pyrite, standardization.
激光烧蚀电感耦合等离子体质谱(LA-ICP-MS)每秒计数(cps)结果进行定量测试，使用电子探针分析(EMP)相同的点分析重量百分比(wt. %);它们是从巴伯顿绿岩带(BGB)的Sheba, New Consort和Fairview金矿中精选的黄铁矿颗粒中获得的。从理论上讲，使用两种不同的技术从相同的黄铁矿颗粒中获得的数据在某种程度上必须代表相同的化学成分，但不完全相同的值。这是因为它们应用于相同的点，在相同的黄铁矿颗粒。然而，在本研究中获得的两种技术的结果不能直接比较。图形和统计技术也被用于描述任何现有的关系。然而，所有这些数据都没有表明黄铁矿中主要或微量元素的分布有任何相似之处。本研究结果表明，两种方法匹配斑点的数据之间的明显相关性由于多个因素(斑点大小、分区、异质性等)而失效，这些因素对基于EMP结果的LA-ICP-MS数据的任何直接标准化程序都产生了负面影响。关键词:激光烧蚀电感耦合等离子体质谱(LA-ICP-MS)，电子探针，Barberton绿岩带，黄铁矿，标准化
{"title":"LA-ICP-MS and EMP relationships in pyrite grains from Barberton Greenstone Belt, South Africa: An attempt for quantification","authors":"M. Altigani","doi":"10.5897/JGMR2020.0331","DOIUrl":"https://doi.org/10.5897/JGMR2020.0331","url":null,"abstract":"Laser Ablation Inductively Coupled Plasma Mass Spectrometry (LA-ICP-MS) count per seconds (cps) results were tested for quantification, using the same spot analyses of Electron Microprobe Analyses (EMP) in weight percentage (wt. %); they were obtained from selected pyrite grains from Sheba, New Consort, and Fairview gold mines of the Barberton Greenstone Belt (BGB). Theoretically, data obtained from the same pyrite grains, using two different techniques must represent, to some extent, the same chemical composition, but not exclusively the same values. This comes because they applied to the same spots, and within the same pyrite grains. Yet, the results obtained in this study of the two techniques are not directly comparable. Graphical and statistical techniques were also applied to depict any existing relationships. However, all do not indicate any kind of similarity in the distribution of major or trace-elements in the pyrite of both datasets. The results of this study imply that the obvious correlations between data of the two techniques for matching spots are failed by several factors (spot size, zoning, heterogeneity, etc.), which are negatively influencing any direct standardization procedure of LA-ICP-MS data based on EMP results. \u0000 \u0000 Key words: Laser Ablation Inductively Coupled Plasma Mass Spectrometry (LA-ICP-MS), electron microprobe, Barberton greenstone belt, pyrite, standardization.","PeriodicalId":430415,"journal":{"name":"Journal of Geology and Mining Research","volume":"58 1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126075218","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}
Detailed field geological mapping, outcrop petrography and thin-section microscopy are employed to delineate and describe igneous rocks, and to infer the tectono-magmatic and geochemical constraints affecting their emplacement in the Tse-Agberagba area, Southwest of Gboko, Southern Benue Trough. Magmatic activity, coupled with folding and deformation were the effects of the Santonian tectonic episode in the area. Petrological (outcrop and thin section) data on these rocks indicate that they are mainly dioritic and doleritic to basaltic on hand specimens. Thin-section microscopy reveals that the dioritic rocks are generally medium-grained and mesocratic, characterized by randomly oriented laths of plagioclase and hornblende. The doleritic rocks are generally melanocratic, fine-grained and porphyritic, and are characterized by randomly oriented microlites of plagioclase of labradorite composition, with olivine and augite in a groundmass of aphanitic plagioclase, olivine and nepheline. The rocks are characterized by sub-ophitic to intersertal relationships between plagioclase and clinopyroxene which develops calcite as an alteration product. The mineralogical assemblages in these rocks suggest crystallization from an alkali-enriched magma, in a divergent tectono-magmatic setting. Key words: Southern Benue Trough, magmatism, dioritic, doleritic, alkali-enriched magma, divergent tectonic setting.
{"title":"Petrological characteristics of some cretaceous igneous rocks, in Southwest of Gboko, Southern Benue Trough, Nigeria","authors":"Emmanuel Chigozie Ani, I. Oha","doi":"10.5897/JGMR2020.0333","DOIUrl":"https://doi.org/10.5897/JGMR2020.0333","url":null,"abstract":"Detailed field geological mapping, outcrop petrography and thin-section microscopy are employed to delineate and describe igneous rocks, and to infer the tectono-magmatic and geochemical constraints affecting their emplacement in the Tse-Agberagba area, Southwest of Gboko, Southern Benue Trough. Magmatic activity, coupled with folding and deformation were the effects of the Santonian tectonic episode in the area. Petrological (outcrop and thin section) data on these rocks indicate that they are mainly dioritic and doleritic to basaltic on hand specimens. Thin-section microscopy reveals that the dioritic rocks are generally medium-grained and mesocratic, characterized by randomly oriented laths of plagioclase and hornblende. The doleritic rocks are generally melanocratic, fine-grained and porphyritic, and are characterized by randomly oriented microlites of plagioclase of labradorite composition, with olivine and augite in a groundmass of aphanitic plagioclase, olivine and nepheline. The rocks are characterized by sub-ophitic to intersertal relationships between plagioclase and clinopyroxene which develops calcite as an alteration product. The mineralogical assemblages in these rocks suggest crystallization from an alkali-enriched magma, in a divergent tectono-magmatic setting. \u0000 \u0000 Key words: Southern Benue Trough, magmatism, dioritic, doleritic, alkali-enriched magma, divergent tectonic setting.","PeriodicalId":430415,"journal":{"name":"Journal of Geology and Mining Research","volume":"70 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-04-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124776371","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}
Ahmed Abubakar Sarki, M. Kwaya, Nasir Abdullahi Maiauduga, Timothy A. Adedokun, Y. Muhammad, Abubakar Nasir Karofi, A. Maigari
The study area is about 40 km2 that is (8 km × 5 km) which is located in Gwarzo Local Government area of Kano State part of Malumfashi sheet 79NE which lies within Longitude E07°57’19.5” and E08°00’00” and Latitude N11° 51’30”andN11°47‘00. Major rock types identified include medium grained biotite-muscovite granite, coarse grained muscovite-biotite granites, quartz-syenite, and quartz-monzonites. Most of the crystals show subhedral to anhedral form and a perfect cleavage is somehow visible. The interference colours observed under cross-polarized light include blue, dark grey, light grey, some pinkish colour and brown colour which disappear upon the stage rotation. Albite and Carlsbad twinning are seen and used to identify the feldspars. Various structural features were observed with NE- SW trend which represents the final imprint of the Pan-African orogeny. Key words: Biotite, granite, cross-polarized, twinning.
{"title":"Geology and petrography of Sabon Garin Kara and environs part of Malumfashi sheet 79 NE Nigeria","authors":"Ahmed Abubakar Sarki, M. Kwaya, Nasir Abdullahi Maiauduga, Timothy A. Adedokun, Y. Muhammad, Abubakar Nasir Karofi, A. Maigari","doi":"10.5897/JGMR2019.0318","DOIUrl":"https://doi.org/10.5897/JGMR2019.0318","url":null,"abstract":"The study area is about 40 km2 that is (8 km × 5 km) which is located in Gwarzo Local Government area of Kano State part of Malumfashi sheet 79NE which lies within Longitude E07°57’19.5” and E08°00’00” and Latitude N11° 51’30”andN11°47‘00. Major rock types identified include medium grained biotite-muscovite granite, coarse grained muscovite-biotite granites, quartz-syenite, and quartz-monzonites. Most of the crystals show subhedral to anhedral form and a perfect cleavage is somehow visible. The interference colours observed under cross-polarized light include blue, dark grey, light grey, some pinkish colour and brown colour which disappear upon the stage rotation. Albite and Carlsbad twinning are seen and used to identify the feldspars. Various structural features were observed with NE- SW trend which represents the final imprint of the Pan-African orogeny. \u0000 \u0000 Key words: Biotite, granite, cross-polarized, twinning.","PeriodicalId":430415,"journal":{"name":"Journal of Geology and Mining Research","volume":"185 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-10-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123245998","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}
3D Moho interface has been computed from the airborne Bouguer anomaly beneath the southern part of the Benue Trough (BT), using the MATLAB program 3DINVER.M. From the study, the maximum Moho depth of 27.5 km and the minimum Moho depth of 18.1 km were computed. Interpretation of the gravity data of the southern part of the BT suggests that igneous input contributed greatly to the understanding of its concomitant deep crustal processes. The Moho depth elevation from the area is calculated to be around 9.4 km. This is in agreement with the Moho uplift within the study region as suggested by earlier researchers. Key words: Lower Benue trough, crust, mantle, bouguer gravity data, 3DINVER.M.
{"title":"Crustal structure of southern Benue Trough, Nigeria from 3D inversion of gravity data","authors":"M. Abdullahi, U. Singh, Umar Muhammad Modibbo","doi":"10.5897/JGMR2018.0299","DOIUrl":"https://doi.org/10.5897/JGMR2018.0299","url":null,"abstract":"3D Moho interface has been computed from the airborne Bouguer anomaly beneath the southern part of the Benue Trough (BT), using the MATLAB program 3DINVER.M. From the study, the maximum Moho depth of 27.5 km and the minimum Moho depth of 18.1 km were computed. Interpretation of the gravity data of the southern part of the BT suggests that igneous input contributed greatly to the understanding of its concomitant deep crustal processes. The Moho depth elevation from the area is calculated to be around 9.4 km. This is in agreement with the Moho uplift within the study region as suggested by earlier researchers. \u0000 \u0000 Key words: Lower Benue trough, crust, mantle, bouguer gravity data, 3DINVER.M.","PeriodicalId":430415,"journal":{"name":"Journal of Geology and Mining Research","volume":"21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-10-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114275687","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}
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