Arabian Journal of Geosciences最新文献

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Investigation of the effects of different layering characteristics on the response of semi-sine hills 不同分层特征对半正弦山丘响应影响的研究
IF 1.827
Arabian Journal of Geosciences Pub Date : 2024-11-18 DOI: 10.1007/s12517-024-12120-1
Mohammad Hossein Nateqi, Masoud Amelsakhi, Morteza Nateqi
{"title":"Investigation of the effects of different layering characteristics on the response of semi-sine hills","authors":"Mohammad Hossein Nateqi,&nbsp;Masoud Amelsakhi,&nbsp;Morteza Nateqi","doi":"10.1007/s12517-024-12120-1","DOIUrl":"10.1007/s12517-024-12120-1","url":null,"abstract":"<div><p>Investigating the phenomenon of topographic amplification and the seismic response of the site is an important issue that has already attracted the attention of many researchers. The studies and researches conducted in the field of topographical effects and also the phenomenon of the amplification of earthquake waves in passing through surface layers have shown that topography has a great impact on the amount of damage caused by earthquakes. The local topographic characteristics amplify the strong movements of the ground during an earthquake and ultimately cause great damages. In this article, the effects of a site (take, for example, one of the most common topographical forms in nature, such as a semi-sinusoidal hill) on the seismic response of the earth’s surface subjected to vertically propagating shear vertical (SV) waves have been studied using FLAC 2D, a two-dimensional finite-difference program. In the numerical modeling, the elastic linear behavior has been used. In this regard, in order to investigate the effects of layering on the response of semi-sine hills, two-layered and three-layered hills with different layering characteristics and thicknesses are considered the basis of this article. In this research, the effect of soil characteristics, layering thickness, and the position of the loose layer has been investigated. From the obtained results, it can be concluded that the characteristics and thickness of the layering and the position of the loose layer have effects on the general trend of amplification on top of the hills and de-amplification near the toe of hills in response to horizontal motion for acceleration, velocity, and displacement components.</p></div>","PeriodicalId":476,"journal":{"name":"Arabian Journal of Geosciences","volume":"17 12","pages":""},"PeriodicalIF":1.827,"publicationDate":"2024-11-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142664438","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}
引用次数: 0
Hydrogeomorphological analysis of Niger River Sub-basins for flood prediction in Anambra State, Nigeria 尼日利亚阿南布拉州用于洪水预测的尼日尔河子流域水文地质分析
IF 1.827
Arabian Journal of Geosciences Pub Date : 2024-11-18 DOI: 10.1007/s12517-024-12127-8
Romanus Udegbunam Ayadiuno, Dominic Chukwuka Ndulue
{"title":"Hydrogeomorphological analysis of Niger River Sub-basins for flood prediction in Anambra State, Nigeria","authors":"Romanus Udegbunam Ayadiuno,&nbsp;Dominic Chukwuka Ndulue","doi":"10.1007/s12517-024-12127-8","DOIUrl":"10.1007/s12517-024-12127-8","url":null,"abstract":"<div><p>Climate change is associated with heavy and excessive rainfalls in the tropics with anticipated fluvial and pluvial flooding. This study aimed to analyze the natural predispositions of river basins in Anambra State, Nigeria to flooding in this era of changing rainfall characteristics necessitated by climate change. This study used primary and secondary data sources. The primary data include field visits and observations, oral interviews, photographs, and measurements, whereas the secondary data include satellite images from the USGS (SRTM DEM), shapefile from Diva GIS, and other related literature. The morphometric parameters analyzed included the area of the sub-basin, perimeter of the sub-basin, stream order, stream length, stream numbers, and sub-basin length, the drainage density, drainage texture, form factor, shape factor, elongation ratio, relief ratio, relative ratio, ruggedness number, and bifurcation ratio. The findings revealed that the sub-basins are elongated in shape, with a dendritic stream pattern, whereas the other hydrogeomorphological characteristics revealed the flooding propensity and erosivity level downstream of their basins. The drainage density (D<sub>d</sub>) of the sub-basins of Anambra state indicates that the basins are made up of porous subsurface material and, therefore, will not encourage flooding. The drainage texture (D<sub>t</sub>) has a very coarse texture category and indicates the presence of fewer streams over basins, as it considers the total number of streams of all orders. The form factor (R<sub>f</sub>) indicates that there is a very low possibility of sudden peak discharge in the basins during heavy rainfalls. The shape factor (S<sub>f</sub>) indicates strongly elongated basins (i.e., S<sub>f</sub> &gt; 0.45) elongated basins indicate a long travel time for flow from the headwaters to the outlets. The sub-basins’ terrain are categorized as having slight, moderate, and sharp morphology with slight, moderate, and sharp roughness and unevenness; slight to moderate exposure to the risks of flood hazards; moderate soil erosion; and/or mass movement. This implies that the increase in flooding in the state might be attributed to increasing urbanization, dense settlement, and human intervention in river flow.</p></div>","PeriodicalId":476,"journal":{"name":"Arabian Journal of Geosciences","volume":"17 12","pages":""},"PeriodicalIF":1.827,"publicationDate":"2024-11-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142664481","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}
引用次数: 0
Well log petrophysics and interpretation of 3D seismic profiles of reservoirs in the Southern Field, Rio Del Rey Basin, Cameroon 喀麦隆里奥德雷盆地南部油田储层的测井岩石学和三维地震剖面解释
IF 1.827
Arabian Journal of Geosciences Pub Date : 2024-11-16 DOI: 10.1007/s12517-024-12083-3
Mbouemboue Nsangou Moussa Ahmed, Olugbengha Ajayi Ehinola, Wokwenmendam Nguet Pauline, Anatole Eugene Djieto Lordon, Anas Mohamed Abaker Babai, Togozo Francis Thierry
{"title":"Well log petrophysics and interpretation of 3D seismic profiles of reservoirs in the Southern Field, Rio Del Rey Basin, Cameroon","authors":"Mbouemboue Nsangou Moussa Ahmed,&nbsp;Olugbengha Ajayi Ehinola,&nbsp;Wokwenmendam Nguet Pauline,&nbsp;Anatole Eugene Djieto Lordon,&nbsp;Anas Mohamed Abaker Babai,&nbsp;Togozo Francis Thierry","doi":"10.1007/s12517-024-12083-3","DOIUrl":"10.1007/s12517-024-12083-3","url":null,"abstract":"<div><p>This work principally involves the petrophysical evaluation and the determination of hydrocarbon saturation of potential reservoirs in the Rio del Rey basin. Petrel 2017 software was used to interpret the obtained data well logs and seismic. Illustrator CS was used to find tune and arrange the maps and figures. From the studies, four reservoirs (S1A1, S1A2, S1A3 and RB) in total were successfully detected from two target wells: S-C1 and S-FB. Porosity, permeability and water saturation ranged between 17 to 22%, 149 to 193.5 mD and 60 to 100%, respectively. Good reservoirs were discovered based on the petrophysical studies at multiple zones, but only two were of interest to this work. The most prolific zones are those with less than 80% saturation of water and porosity of 17% and 22%. The remaining zones had the same porosity and permeability range but were not considered prolific zones due to high shale volume and more than 80% water saturation. Seismic interpretation revealed the presence of seven listric faults, two major faults (F9 and F19 trending in the NE-SW and E-W direction, respectively) and five minor faults (F7, and F2, and F6 which appear in the two wells). Faults F9, F2 and F6 trend in the same direction as the major faults: Eastern to Western. Four major horizons (S1A1, S1A2, S1A3, RB) were identified in well S-C1, and only one of these major horizons was identified in well S-FB (S1A3). All these horizons correspond to the five reservoir tops to be studied in the two target wells. Rollover anticlinal structures and fault closures between the listric faults were identified. All three types of environments of deposition of sediments were found in the reservoirs: progradational (sediment shift landward), aggradational (deposition far away from shore) and retrogradational (sediment shift seaward) sequences. Rollover anticline or four-way structural closure constitutes the main mechanism for trap formation. STOOIP of the reservoirs have been determined with S1A3 and RB zone being more prolific. The STOOIP of S1A3 is given by 11.2 MMbbls high case, 8.5 MMbbls base case and 7.4 MMbbls low case, while the STOOIP of RB is given by 8.6 MMbbls for the base case and 10.8 MMbbls for the high case.</p></div>","PeriodicalId":476,"journal":{"name":"Arabian Journal of Geosciences","volume":"17 12","pages":""},"PeriodicalIF":1.827,"publicationDate":"2024-11-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142645667","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}
引用次数: 0
Spatio-temporal rainfall distribution and trend analysis of upper Godavari basin, India 印度上戈达瓦里盆地降雨时空分布与趋势分析
IF 1.827
Arabian Journal of Geosciences Pub Date : 2024-11-15 DOI: 10.1007/s12517-024-12123-y
Jyoti Pathare, Pragati Deshmukh, Ashali Kharake, Anilkumar Pathare
{"title":"Spatio-temporal rainfall distribution and trend analysis of upper Godavari basin, India","authors":"Jyoti Pathare,&nbsp;Pragati Deshmukh,&nbsp;Ashali Kharake,&nbsp;Anilkumar Pathare","doi":"10.1007/s12517-024-12123-y","DOIUrl":"10.1007/s12517-024-12123-y","url":null,"abstract":"<div><p>This current research analyzed the spatio-temporal trends and variability of monsoon season and month-wise rainfall for 26 tehsils in the upper Godavari basin (UGB) of Maharashtra, India. An attempt has been evaluated on rainfall data (1998–2023) obtained from the Department of Agriculture, Maharashtra. To assess the basic trends of the rainfall data statistical techniques, i.e., mean monthly and monsoonal rainfall, standard deviation (SD), and non-parametric method such as Mann–Kendall (MK) trend test, furthermore, simple linear regression (SLR) equation has been applied. Rainfall variability has been examined using the coefficient of variation (CV), and analyzed data has been incorporated into the GIS environment to prepare various maps. The MK analysis revealed an insignificant decreasing trend, especially in June, which suggests a declining trend in rainfall quantity. In contrast, an insignificant increasing trend has been noticed in September which interprets that maximum rainfall occurred in this month in the UGB. In the monsoon season, most of the places denoted no trend, while Dindori (<i>Z</i> = 2.51) and Akole (<i>Z</i> = 1.76) tehsils show significant increasing trends but a drastic decline in the Igatpuri tehsil (<i>Z</i> = − 2.65) The rainfall has been seen to increase towards the west due to the block posed by the Western Ghat to the east-flowing monsoon wind. This study also revealed the monsoon rainfall varied between 93% (Ahmednagar tehsil) and 25% (Aurangabad tehsil) and monsoon month-wise maximum variability (154%) at Ahmednagar in September and minimum (29%) at Igatpuri in July. The approach adopted in this paper identified the micro-level rainfall distribution, trend, and variability which will be greatly advantageous for sustainable water resource management.</p></div>","PeriodicalId":476,"journal":{"name":"Arabian Journal of Geosciences","volume":"17 12","pages":""},"PeriodicalIF":1.827,"publicationDate":"2024-11-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142636766","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}
引用次数: 0
Assessment of groundwater resources to support urban extension in West Nile Delta, Egypt 支持埃及西尼罗河三角洲城市扩展的地下水资源评估
IF 1.827
Arabian Journal of Geosciences Pub Date : 2024-11-14 DOI: 10.1007/s12517-024-12121-0
Kamal Ali, Osman Ebrahem, Mahmoud Zayed
{"title":"Assessment of groundwater resources to support urban extension in West Nile Delta, Egypt","authors":"Kamal Ali,&nbsp;Osman Ebrahem,&nbsp;Mahmoud Zayed","doi":"10.1007/s12517-024-12121-0","DOIUrl":"10.1007/s12517-024-12121-0","url":null,"abstract":"<div><p>The study area represents a western urban extension of the overpopulated Nile Delta toward the west. The exploration and evaluation of groundwater in the West Nile Delta has great importance because of the need to establish new industrial and agricultural areas while preserving the agricultural lands of the Nile Delta. This study includes the direct current (DC) resistivity method for exploring water-bearing layers and the hydrogeochemical assessment of groundwater for drinking, irrigation, and other uses. The DC resistivity results reflected four geoelectrical layers, with one water-bearing layer selected. The hydrogeochemical evaluation was carried out by the analysis of physicochemical parameters and major ion concentrations. The water quality index (WQI) results showed that the groundwater was divided into 53.3% excellent, 33.3% good, 6.6% poor, 6.6% very poor, and 0% unsuitable for drinking. The electrical conductivity, total dissolved solids, soluble sodium percentage, sodium absorption ratio, residual sodium carbonate, magnesium absorption ratio, and chloride content were used to estimate the groundwater quality for irrigation. While TDS, total hardness, and corrosivity ratio were used to evaluate groundwater for domestic uses, the findings of the WQI study recommend that the excellent and good water wells can be utilized for drinking, while the remainder of the wells can’t be used without filtering with adequate membranes.</p></div>","PeriodicalId":476,"journal":{"name":"Arabian Journal of Geosciences","volume":"17 12","pages":""},"PeriodicalIF":1.827,"publicationDate":"2024-11-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142636848","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}
引用次数: 0
Quartz grain surface features and mineralogy of sediments in the Sundarbans Forest site, Bangladesh: Constraints on the depositional environment and provenance 孟加拉国孙德尔本斯森林遗址沉积物的石英颗粒表面特征和矿物学:沉积环境和产地的制约因素
IF 1.827
Arabian Journal of Geosciences Pub Date : 2024-11-11 DOI: 10.1007/s12517-024-12124-x
H. M. Zakir Hossain, Md. Aminul Islam, Anas Al Hossain, John S. Armstrong-Altrin, Farzana Yeasmin Nipa
{"title":"Quartz grain surface features and mineralogy of sediments in the Sundarbans Forest site, Bangladesh: Constraints on the depositional environment and provenance","authors":"H. M. Zakir Hossain,&nbsp;Md. Aminul Islam,&nbsp;Anas Al Hossain,&nbsp;John S. Armstrong-Altrin,&nbsp;Farzana Yeasmin Nipa","doi":"10.1007/s12517-024-12124-x","DOIUrl":"10.1007/s12517-024-12124-x","url":null,"abstract":"<div><p>An investigation on medium to coarse-grained quartz grains (QG) recovered from a ~ 100-m drilled core section of the Sundarbans Forest site in the southwestern Bangladesh was carried out to infer the source and depositional environment. Thirty-six microtextures were identified from 200 QG using a scanning electron microscopy (SEM). The QG surface features are categorized into mechanical (number of features <i>n</i> = 25), chemical (<i>n</i> = 5), and combined mechanical and chemical (<i>n</i> = 6), which provide invaluable insights on the transport mechanism, provenance, and depositional environment. Microtextures of mechanical origin include parallel striations, straight steps, crescentic percussion marks, conchoidal fractures, arcuate steps, fresh polished surfaces, V-shaped marks, broken edges, abrasion fatigue, and bulbous and meandering edges, which are more common in QG and ascribed to high-energy eolian and fluvial transports. The abundant chemical features such as crystalline overgrowth, silica globules, scaling, silica pellicle, and silica flower are omnipresent on QG surfaces, demonstrating a subaqueous diagenetic environment. Fracture plates/planes, high relief, elongated depressions, adhering particles, chatter marks, and oriented etch pits are common in the QG, suggesting a subaqueous nearshore marine environment. There is a high abundance of quartz (Si), feldspar (Na and K), titanite (Ti), and zircon (Zr) in the core sediments, indicating their derivation from felsic source rocks.</p></div>","PeriodicalId":476,"journal":{"name":"Arabian Journal of Geosciences","volume":"17 12","pages":""},"PeriodicalIF":1.827,"publicationDate":"2024-11-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s12517-024-12124-x.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142598843","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Organic carbon and nutrient enrichment in clay-rich calcareous soils in self-regenerating fallows in humid tropical agroecology 湿润热带农业生态中自再生休耕的富含钙质的粘土土壤中的有机碳和养分富集作用
IF 1.827
Arabian Journal of Geosciences Pub Date : 2024-11-11 DOI: 10.1007/s12517-024-12122-z
Samuel Ayodele Mesele, Paul A. S. Soremi, Benedicta Essel Ayamba, Jamiu Aderolu, Victor A. Olayiwola
{"title":"Organic carbon and nutrient enrichment in clay-rich calcareous soils in self-regenerating fallows in humid tropical agroecology","authors":"Samuel Ayodele Mesele,&nbsp;Paul A. S. Soremi,&nbsp;Benedicta Essel Ayamba,&nbsp;Jamiu Aderolu,&nbsp;Victor A. Olayiwola","doi":"10.1007/s12517-024-12122-z","DOIUrl":"10.1007/s12517-024-12122-z","url":null,"abstract":"<div><p>Self-regenerating fallows are areas left to regenerate naturally after agricultural use and are typically characterized by diverse plant species and minimal human intervention. To measure the efficiency of this natural fallow system, we evaluated soil organic carbon (SOC) and nutrient concentrations vis-à-vis the fallow duration. The study site was located in the Onigbedu community, Ogun State, Nigeria, with large commercial limestone deposits. Mining and agriculture are the main land use types. The study was oriented on 100 hectares of land previously cultivated at different times and left to fallow. The fallow duration ranged between less than 3 years and more than 20 years. At the end of this study, it was observed that the soils are within a large group of calcareous soils. SOC ranged from 15 to 26 mg/g, available phosphorus from 3.0 to 6.0 mg/kg, total nitrogen from 0.5–2.0 mg/g, effective cation exchange capacity (ECEC) from 2.0–24.0 cmol<sub>(+)</sub>/kg, calcium from 2.0–20 cmol<sub>(+)</sub>/kg, Mg from 1.0–2.0 cmol<sub>(+)</sub>/kg, 0.1–0.4 cmol<sub>(+)</sub>/kg, manganese from 19 to 80 mg/kg, and zinc from 1.5–2.0 mg/kg in increasing order of fallow duration. Soil nutrients and SOC improved consistently with increasing fallow periods. While fallow duration influenced soil nutrient build-up, other management practices and environmental factors also play significant roles. Farmers can enhance soil fertility and nutrient levels by optimizing fallow durations and using efficient soil management practices, leading to sustainable agriculture and improved crop yields.</p></div>","PeriodicalId":476,"journal":{"name":"Arabian Journal of Geosciences","volume":"17 12","pages":""},"PeriodicalIF":1.827,"publicationDate":"2024-11-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142598844","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}
引用次数: 0
Pollution status of drinking water sources proximal to dumpsites: insights from diverse geo-environmental settings in Nigeria 垃圾场附近饮用水源的污染状况:从尼日利亚不同地理环境中得出的启示
IF 1.827
Arabian Journal of Geosciences Pub Date : 2024-11-05 DOI: 10.1007/s12517-024-12116-x
Temitayo Olamide Ale, Thompson Henry Tolulope Ogunribido
{"title":"Pollution status of drinking water sources proximal to dumpsites: insights from diverse geo-environmental settings in Nigeria","authors":"Temitayo Olamide Ale,&nbsp;Thompson Henry Tolulope Ogunribido","doi":"10.1007/s12517-024-12116-x","DOIUrl":"10.1007/s12517-024-12116-x","url":null,"abstract":"<div><p>Clean and potable water is an essential investment for good health. This study investigated the impacts of dumpsites on groundwater quality in Ondo State, Nigeria, and analyzed groundwater contamination across different geological environments in the country; using multi-pollution indices and statistical analyses. Water samples from sixteen wells and two streams (Well 1-Well 16, Stream 1 and 2) around the three dumpsites were collected and analyzed for pH, total dissolved solid (TDS), electrical conductivity (EC), sodium (Na), calcium (Ca), magnesium (Mg), potassium (K), chromium (Cr), lead (Pb), zinc (Zn), nickel (Ni), manganese (Mn), and iron (Fe). All the samples met the World Health Organization (WHO) and Nigerian Specification for Drinking Water Quality (NSDWQ) specifications for TDS, EC, Na, Ca, Mg, Mn, Zn and Fe. Some water samples had moderately high concentrations of K, Ni, Cr and Pb, rendering them unsafe for consumption. The multi-pollution indices indicated significant contamination in the water samples. Similarly, the human health risk assessment revealed that prolonged consumption of water from the analyzed wells may pose significant health risks to the local population. The analysis of variance (ANOVA) revealed that pH and temperature varied significantly among the dumpsites while the Pearson’s correlation coefficient (PCC) revealed strong correlations for EC-TDS, Ni-K, Pb-Mn, and Ni-pH between the three dumpsites, suggesting similar hydrogeochemical processes from a common source. A Cd-Zn relationship was also observed for dumpsites in the three geological environments. Regular monitoring of heavy metal concentrations in groundwater near dumpsites is crucial to ensure the safety and quality of water resources for local communities.</p></div>","PeriodicalId":476,"journal":{"name":"Arabian Journal of Geosciences","volume":"17 12","pages":""},"PeriodicalIF":1.827,"publicationDate":"2024-11-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142579380","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}
引用次数: 0
Mineral mapping of a gold prospect using ordinary cokriging and support vector machine algorithm: case of the Tikondi gold permit (eastern Cameroon) 使用普通 cokriging 和支持向量机算法绘制金矿远景的矿产图:Tikondi 金矿许可(喀麦隆东部)案例
IF 1.827
Arabian Journal of Geosciences Pub Date : 2024-11-04 DOI: 10.1007/s12517-024-12119-8
Andre William Boroh, Esaïe Silvère Lawane, Bertrand Ngwang Nfor, Reynolds Yvan Abende, Francois Ndong Bidzang
{"title":"Mineral mapping of a gold prospect using ordinary cokriging and support vector machine algorithm: case of the Tikondi gold permit (eastern Cameroon)","authors":"Andre William Boroh,&nbsp;Esaïe Silvère Lawane,&nbsp;Bertrand Ngwang Nfor,&nbsp;Reynolds Yvan Abende,&nbsp;Francois Ndong Bidzang","doi":"10.1007/s12517-024-12119-8","DOIUrl":"10.1007/s12517-024-12119-8","url":null,"abstract":"<div><p>This study applied geostatistical and machine learning models, namely ordinary cokriging (OCK) and the support machine vector (SVM) algorithm, for mineral mapping of a gold prospect at Tikondi (East, Cameroon). For this purpose, five hundred and fifty (550) soil samples were collected and analyzed for Au, Ag, Zn, Fe, Cu, Pb, As, Sb, W and Bi. OCK and SVM models were validated using numerical and graphical methods of validation. Results showed that the gold grade ranged from 1 to 2480 ppb, with an average value of 9.973 ppb. The principal component analysis (PCA) demonstrated that bismuth (Bi) has the strongest association with gold grades. For OCK, the histogram of errors indicated a solid assessment when the root mean square error (RMSE = 21.41), mean absolute error (MAE = 4.76) and correlation coefficient (<i>R</i> = 0.841) indicated that OCK is a decent model, but with certain values poorly predicted. The confusion matrix and ROC measurement indicated clearly that SVM was a robust and efficient predictor for prospect mapping.</p></div>","PeriodicalId":476,"journal":{"name":"Arabian Journal of Geosciences","volume":"17 12","pages":""},"PeriodicalIF":1.827,"publicationDate":"2024-11-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142573684","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}
引用次数: 0
Radioactive potentiality and uranium migration as assessed from airborne gamma-ray spectrometric data, north Wadi Qena area, Northern Eastern Desert, Egypt 根据机载伽马射线光谱数据评估的放射性潜力和铀迁移,埃及东部沙漠北部 Wadi Qena 北部地区
IF 1.827
Arabian Journal of Geosciences Pub Date : 2024-11-01 DOI: 10.1007/s12517-024-12118-9
Reda Abdu Yousef El‑Qassas
{"title":"Radioactive potentiality and uranium migration as assessed from airborne gamma-ray spectrometric data, north Wadi Qena area, Northern Eastern Desert, Egypt","authors":"Reda Abdu Yousef El‑Qassas","doi":"10.1007/s12517-024-12118-9","DOIUrl":"10.1007/s12517-024-12118-9","url":null,"abstract":"<div><p>The airborne gamma-ray spectrometric (AGS) data of the north Wadi Qena area were used to map the radioactive potentiality and uranium migration. Examination of the potassium (K), equivalent uranium (eU), equivalent thorium (eTh), and ternary maps displayed the areas of potential radioactivity. The results of uranium favorability (U<sub>2</sub>) index revealed that the granitic rocks, Rakhiyat, Esna, and Sudr formations, have high uranium potential. On the other hand, the computed uranium migration maps (original uranium (U<sub>o</sub>), migrated uranium (U<sub>m</sub>), uranium migration rate (P%), eU-eTh/3.5, and eU point anomaly) allowed the delineation of migration patterns (inward and outward) for all the rock units of the area under study. The inward uranium migration distinguished the Sudr, Esna, and Rakhiyat formations, while the other rocks displayed outward uranium migration. The investigation of geological structural data indicated that the research area was influenced by NNW-SSE, NE-SW, NNE-SSW, ENE-WSW, and WNW-ESE trends. These structures most likely had a significant influence on uranium movement and migration (in and out) of the rocks in the current study area.</p></div>","PeriodicalId":476,"journal":{"name":"Arabian Journal of Geosciences","volume":"17 11","pages":""},"PeriodicalIF":1.827,"publicationDate":"2024-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142565945","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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