Arabian Journal of Geosciences最新文献

筛选
英文 中文
Geology and structural evolution of neoproterozoic rocks of Tahtai Logomti Area, Tigrai, Northern Ethiopia 埃塞俄比亚北部Tigrai地区Tahtai Logomti地区新元古代岩石地质与构造演化
IF 1.827
Arabian Journal of Geosciences Pub Date : 2025-01-29 DOI: 10.1007/s12517-025-12203-7
Azeb Gebremicale, Mulugeta Alene, Teklay Gidey
{"title":"Geology and structural evolution of neoproterozoic rocks of Tahtai Logomti Area, Tigrai, Northern Ethiopia","authors":"Azeb Gebremicale,&nbsp;Mulugeta Alene,&nbsp;Teklay Gidey","doi":"10.1007/s12517-025-12203-7","DOIUrl":"10.1007/s12517-025-12203-7","url":null,"abstract":"<div><p>The current study examines the metamorphism, petrography characteristics, and geological structures to construct a detailed geological map of the Tahtai Logomti region. The rock types include low-grade metavolcanic, metavolcanoclastic, carbonate, and clastic metasedimentary. Both petrographic description and field studies were conducted to accurately identify the different lithologies, structural features and mineral assemblages. Field and petrographic observations show rocks that have undergone low-grade metamorphism and fall within the lower greenschist facies. Three distinct phases of deformations (D1, D2, and D3) were identified and correlated with the previous classifications. According to the result, the rocks exhibit an NW–SE trend of joints oriented vertically to sub-vertical and a NE-SW trend of foliation, consistent with the regional trend of the Mai-Kenetal syncline. Hydrothermal-induced epidotization, chloritization, and sericitization are common in the study area.</p></div>","PeriodicalId":476,"journal":{"name":"Arabian Journal of Geosciences","volume":"18 2","pages":""},"PeriodicalIF":1.827,"publicationDate":"2025-01-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143110097","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 heavy metal pollution in groundwater and prediction of distance of tolerable health risks to a contiguous huge waste dump in a Nigerian City 对尼日利亚某城市地下水重金属污染的评估和对可容忍健康风险距离的预测
IF 1.827
Arabian Journal of Geosciences Pub Date : 2025-01-29 DOI: 10.1007/s12517-025-12183-8
Emeka Ogbuene, Uzoma Nwankwo, Uzochukwu C. Ugochukwu
{"title":"Assessment of heavy metal pollution in groundwater and prediction of distance of tolerable health risks to a contiguous huge waste dump in a Nigerian City","authors":"Emeka Ogbuene,&nbsp;Uzoma Nwankwo,&nbsp;Uzochukwu C. Ugochukwu","doi":"10.1007/s12517-025-12183-8","DOIUrl":"10.1007/s12517-025-12183-8","url":null,"abstract":"<div><p>In this study, the heavy metal pollution of the groundwater contiguous to the largest waste dump site in Aba, Abia State Nigeria was investigated to determine the variation of health risks of exposure to the heavy metals with distance away from the waste dumpsite so as to generate regression models that could predict distance to the dumpsite of tolerable health risks. The concentration of the heavy metals in the groundwater was measured using atomic absorption spectrometry (AAS). Heavy metals of common pollution sources and their likely sources were determined using principal component analysis (PCA). The extent of heavy metal pollution of the groundwater was evaluated using heavy metal pollution index (HPI) and heavy metal evaluation index (HEI). The risk index (RI) and hazard index (HI) were employed in ascertaining carcinogenic and non-carcinogenic health risks respectively. The models for prediction of distances of tolerable health risks were generated using linear and polynomial regression models. Results indicate that the concentration of the heavy metals decreased with distance away from the waste dump site. Lead and cadmium had concentrations exceeding that of WHO standard at all the Boreholes at concentrations ranging from 0.03 to 1.94 mg/L for lead and 0.03 to 0.19 mg/L for cadmium. The PCA results indicate that copper and zinc had same source whereas nickel, chromium, lead and cadmium had same source with nickel and cadmium also showing an auxiliary same source. The HEI values (21 to 1401) indicate that some of the boreholes have groundwater of low heavy metal pollution whereas others are either of medium or high heavy metals pollution. The HPI values (275–4307) indicate that the groundwater for all boreholes is heavy metal polluted. The HI and RI values were significant across all boreholes and also significantly decrease with distance away from the dumpsite. The polynomial regression models were more robust in predicting the distance of tolerable health risks. Consequently, polynomial regression models as opposed to linear regression models may find utility in water quality management that is geared towards minimization of health risks.</p></div>","PeriodicalId":476,"journal":{"name":"Arabian Journal of Geosciences","volume":"18 2","pages":""},"PeriodicalIF":1.827,"publicationDate":"2025-01-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143110126","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
Mechanics and modelling approaches of rockfall: a comprehensive review for hazard mitigation in hill roads 岩崩的力学和建模方法:山道减灾的综合综述
IF 1.827
Arabian Journal of Geosciences Pub Date : 2025-01-28 DOI: 10.1007/s12517-025-12189-2
Shreya Maheshwari, Riya Bhowmik, Manojit Samanta
{"title":"Mechanics and modelling approaches of rockfall: a comprehensive review for hazard mitigation in hill roads","authors":"Shreya Maheshwari,&nbsp;Riya Bhowmik,&nbsp;Manojit Samanta","doi":"10.1007/s12517-025-12189-2","DOIUrl":"10.1007/s12517-025-12189-2","url":null,"abstract":"<div><p>Rockfall, a rapid and high-impact landslide phenomenon, poses significant risks to lives, infrastructure, and transportation routes in hilly and mountainous regions. This hazard is characterized by sudden occurrences, widespread impact, fluctuating magnitudes, randomness, and a high fatality rate. The present study aims to provide a knowledge base for stakeholders in infrastructure projects in hilly regions by consolidating findings from reported studies on rockfall. Through a review of reported studies, three key aspects of rockfall are discussed: kinematics, source zone identification, and modelling approaches. Factors influencing rockfall detachment, modes of motion, impact force, and fragmentation are discussed, along with challenges in identifying potential source zones and proposed advanced methodologies for more precise identification and monitoring. Various modelling approaches for assessing rockfall characteristics and trajectories are evaluated, emphasizing the significance of numerical simulations and 3D modelling for accurate evaluation and mitigation strategy assessment. The study also highlights limitations in current modelling approaches and outlines future research directions including the integration of vegetation-related factors, incorporation of fragmentation phenomenon, utilization of advanced technologies for source zone identification, and advancements in rockfall detection and prediction through deep learning techniques. The ultimate goal is to apprise the stakeholders about present tools and techniques for conducting detailed rockfall trajectory simulation and prediction, so that the most suitable rockfall mitigation and/or protection strategy can be selected and implemented based on the specific characteristics of the site.</p></div>","PeriodicalId":476,"journal":{"name":"Arabian Journal of Geosciences","volume":"18 2","pages":""},"PeriodicalIF":1.827,"publicationDate":"2025-01-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143109840","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 water quality on the reservoir of hydropower plant: case study Bajo Anchicayá dam, Colombia 水电站水库水质评价:以哥伦比亚Bajo anchicay<e:1>大坝为例
IF 1.827
Arabian Journal of Geosciences Pub Date : 2025-01-25 DOI: 10.1007/s12517-025-12187-4
Pedro Wirley Castro, Henry Nelson Vargas
{"title":"Assessment of water quality on the reservoir of hydropower plant: case study Bajo Anchicayá dam, Colombia","authors":"Pedro Wirley Castro,&nbsp;Henry Nelson Vargas","doi":"10.1007/s12517-025-12187-4","DOIUrl":"10.1007/s12517-025-12187-4","url":null,"abstract":"<div><p>This paper presents the effects of the hydroelectric reservoir on the water quality in Bajo Anchicaya, a hydropower plant in the southwest of Colombia. The study implicated the comparison of water quality at five sites: before the reservoir, entering the reservoir, at the intake, in the reduced channel, and downstream of the hydropower plant discharge. The data collected were analyzed with the analysis of variance (ANOVA) statistical tool to investigate the significance of the reservoir, season, and the hydropower plant operation on the water quality. The IPOMO (pollution index by organic matter) showed that contamination by organic matter in all cases was none or low, the IPOSUS (pollution index by suspended solids) showed that there was no contamination by suspended solids, and the WQI (water quality index) showed good results. From the ANOVA results, season (flow) and hydropower plant are all significant about the water quality. ANOVA also showed a positive effect of the hydropower plant operation on water quality in terms of the Settleable solids and electrical conductivity in the water. Studies like these can improve the understanding of the influence of reservoirs and hydropower plants on water quality to implement water resource management strategies that maintain good water quality indices and prevent its deterioration.</p></div>","PeriodicalId":476,"journal":{"name":"Arabian Journal of Geosciences","volume":"18 2","pages":""},"PeriodicalIF":1.827,"publicationDate":"2025-01-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143109685","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 agricultural land use suitability using TOPSIS and VIKOR models: a case study of Koch Bihar district, West Bengal 基于TOPSIS和VIKOR模型的农业用地适宜性评估:以西孟加拉邦科赫比哈尔邦为例
IF 1.827
Arabian Journal of Geosciences Pub Date : 2025-01-25 DOI: 10.1007/s12517-025-12193-6
Pritam Saha, Shasanka Kumar Gayen
{"title":"Assessment of agricultural land use suitability using TOPSIS and VIKOR models: a case study of Koch Bihar district, West Bengal","authors":"Pritam Saha,&nbsp;Shasanka Kumar Gayen","doi":"10.1007/s12517-025-12193-6","DOIUrl":"10.1007/s12517-025-12193-6","url":null,"abstract":"<div><p>As the need for food crops and other agricultural goods continues to rise, there is an apparent shift towards intensive agricultural land usage and growth in the Koch Bihar district of West Bengal. However, the quantity of land accessible for agriculture, its location and its suitability for farming have not been adequately investigated. Finding suitable land for agriculture in the Koch Bihar district with the aid of multiple physical, hydrological, climatic and infrastructural variables is the primary objective of this present study. Therefore, eighteen causative factors, including geomorphology, slope, elevation, land use and land cover, soil texture, rainfall, groundwater depth, modified soil adjusted vegetation index, temperature, river density, topographic wetness index, distance from road, organic carbon, soil pH, total nitrogen, cation exchange capacity, bulk density, and silt particles, were considered for land suitability analysis using Technique for Order Preference by Similarity to Ideal Solution (TOPSIS) and Vise Kriterijumska Optimizacijaik Ompromisno Resenje (VIKOR) models. Results showed that in the TOPSIS model, most of the region (36.88%) was classified as moderately suitable, followed by 27.60% as marginally suitable, 17.87% as highly suitable, 14.57% as currently not suitable and 3.08% as unsuitable for agriculture. In contrast, 34.26% of the region was categorized as moderately suitable and 20.56% as highly suitable in the VIKOR model. 350 Ground Control Points (GCP) from the study area that represented a variety of topographical and LULC conditions were examined for the model validation. With an appropriate degree of discrimination, shown by the area under the curve value of 0.911, VIKOR has demonstrated a great result between the two models. Identifying and mapping suitable agricultural land is essential for sustainable development because it provides food security, optimizes resource usage, protects the environment, enables land use planning and promotes economic growth.</p></div>","PeriodicalId":476,"journal":{"name":"Arabian Journal of Geosciences","volume":"18 2","pages":""},"PeriodicalIF":1.827,"publicationDate":"2025-01-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143109573","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
Geo-electrical characterization and delineation of subsurface fractures to detect in-situ seepage in lake waters 地下裂缝的地电表征与圈定以探测湖泊水体的原位渗漏
IF 1.827
Arabian Journal of Geosciences Pub Date : 2025-01-24 DOI: 10.1007/s12517-025-12182-9
Anil Kumar Misra, Rakesh Kr. Ranjan, Nishchal Wanjari, Swapan Dolui, Manish Kumar Keshare, Kuldeep Dutta, Bidyutjyoti Baruah
{"title":"Geo-electrical characterization and delineation of subsurface fractures to detect in-situ seepage in lake waters","authors":"Anil Kumar Misra,&nbsp;Rakesh Kr. Ranjan,&nbsp;Nishchal Wanjari,&nbsp;Swapan Dolui,&nbsp;Manish Kumar Keshare,&nbsp;Kuldeep Dutta,&nbsp;Bidyutjyoti Baruah","doi":"10.1007/s12517-025-12182-9","DOIUrl":"10.1007/s12517-025-12182-9","url":null,"abstract":"<div><p>Geophysical electrical resistivity surveys were carried out in a small lake named as “Nagi lake” located at Namthang, South District, Sikkim, India, for determining the source of in-situ seepage of lake water. Preliminary investigation suggests that the water seepage problem increased after the extension of the lake or after making a check dam surrounding the extended lake. The present study characterizes the origin of water seepage through an unknown fracture in the subsurface of “Nagi Lake.” Seepage path directions were demarcated with the help of an Azimuthal method, whereas sites of fractured areas causing lake water leakages were analyzed via Electrical sounding and profiling techniques. Maps of the fractured zone were developed with the help of a statistical analysis method, also known as the factor method of the traditional vertical electrical sounding (VES) that is ambiguous in method of curve matching. Main emphasis was given to locate subsurface fractures and their orientation. Delineation of location of subsurface fractures and their treatment will aid in minimizing the seepage of water from the lake. Retention of water throughout the year in lake will boost tourism near Nagi Lake area as well as aid in promoting water security in the region.</p></div>","PeriodicalId":476,"journal":{"name":"Arabian Journal of Geosciences","volume":"18 2","pages":""},"PeriodicalIF":1.827,"publicationDate":"2025-01-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143109100","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
Sweet spot prediction and technology application of coalbed methane development in Tiaohu-Malang depression of Santanghu Basin 三塘湖盆地条湖—马郎凹陷煤层气开发甜点预测及技术应用
IF 1.827
Arabian Journal of Geosciences Pub Date : 2025-01-24 DOI: 10.1007/s12517-024-12167-0
Yue Chen, Haoran Zhu, Xinggang Wang, Gaoxiang Rong, Qiqi Lei, Chenlu Tang, Jinbo Shi, Zan Liu
{"title":"Sweet spot prediction and technology application of coalbed methane development in Tiaohu-Malang depression of Santanghu Basin","authors":"Yue Chen,&nbsp;Haoran Zhu,&nbsp;Xinggang Wang,&nbsp;Gaoxiang Rong,&nbsp;Qiqi Lei,&nbsp;Chenlu Tang,&nbsp;Jinbo Shi,&nbsp;Zan Liu","doi":"10.1007/s12517-024-12167-0","DOIUrl":"10.1007/s12517-024-12167-0","url":null,"abstract":"<div><p>Unconventional oil and gas resources are characterized by low abundance and strong heterogeneity. Effective sweet spot prediction and mining technology are important for their efficient development. At present, the exploration and development of coalbed methane in the Santanghu Basin is still in the initial stage. Many problems in coalbed methane sweet spot prediction and mining technology seriously restrict the efficient development of coalbed methane resources. In order to study the most suitable evaluation indexes and methods for sweet spot prediction of coalbed methane development in Tiaohu-Malang Depression of Santanghu Basin, various technical means such as high-pressure mercury injection experiment, liquid nitrogen adsorption, and nuclear magnetic resonance are jointly used to analyze the occurrence state and mining technical conditions of coalbed methane in this area, establish a coalbed methane resource evaluation system, and accurately predict the sweet spot area of coalbed methane development. The results show that the main buried depth of the No.9 coal seam of Xishanyao Formation in Tiaohu-Malang Depression is 600–2600 m, and the thickness of coal seam is 5.0–60.9 m. The proportion of pore size volume of No.9 coal seam in the T1 well is mainly large pores and micropores, the proportion of mesopores is slightly smaller, and the specific surface area is opposite. The open pores of coal samples are more developed and the connectivity is better. The smaller pore size section of the coal sample is larger. When the P/P<sub>0</sub> value of the coal sample is about 0.5, there are sudden drop points and more ink bottle-shaped pores are developed. The lithology of the roof and floor is mainly mudstone, and the occurrence condition of coalbed methane is superior. Based on the geological conditions of coalbed methane in this area and the experience of coalbed methane exploration and development at home and abroad, 14 index evaluation indexes such as coal seam thickness, burial depth, lithology of coal seam roof and floor, structure, and so on are optimized and optimized. The sweet spot area of coalbed methane (type I area) is predicted to be mainly distributed in the northeast of Tiaohu Depression and the west of Malang Depression. Taking T1-5 well as an example, the five-stage dual-pressure control method is adopted in the drainage system. The bottom well flow pressure drop is controlled to be ≤ 0.02 MPa/d in the pressure holding and production release stages, and the bottom well flow pressure drop is ≤ 0.01 MPa/d in the stable production stage. The above methods and technologies have achieved initial results in the development of well T1-5, with the highest gas production of 2297 m<sup>3</sup>/d and the average gas production of 1300 m<sup>3</sup>/d, showing good gas production effect, which has important guiding significance for the subsequent efficient development of low-rank coalbed methane in Santanghu Basin.</p></div>","PeriodicalId":476,"journal":{"name":"Arabian Journal of Geosciences","volume":"18 2","pages":""},"PeriodicalIF":1.827,"publicationDate":"2025-01-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143109109","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
Effects of land use/land cover change on soil physicochemical properties and soil carbon stock in Kochore district, southern Ethiopia 埃塞俄比亚南部Kochore地区土地利用/覆被变化对土壤理化性质和土壤碳储量的影响
IF 1.827
Arabian Journal of Geosciences Pub Date : 2025-01-24 DOI: 10.1007/s12517-025-12181-w
Cherinet Miju, Alemayehu Kiflu, Shimelis Gizachew
{"title":"Effects of land use/land cover change on soil physicochemical properties and soil carbon stock in Kochore district, southern Ethiopia","authors":"Cherinet Miju,&nbsp;Alemayehu Kiflu,&nbsp;Shimelis Gizachew","doi":"10.1007/s12517-025-12181-w","DOIUrl":"10.1007/s12517-025-12181-w","url":null,"abstract":"<div><p>Land use changes from year to year due to natural and human-made factors are a serious cause of the degradation of soil properties. Therefore, this study aimed to investigate the impact of land use land cover changes on selected soil physicochemical properties and soil organic carbon stocks in Kochore district, Southern Ethiopia. Satellite images (2000, 2010, and 2020) were used as sources of information for land use and land cover analysis using ArcGIS 10.3 and ERDAS Imagine 2014 software. Three land use types (cultivated, agroforestry, and grazing land) were identified through field surveys and satellite image analysis. Soil samples were collected at different depths (0–20 cm and 20–40 cm), and selected soil properties were analyzed. The results indicate that geospatial data of the land cover of agroforestry continuously increased and a decrease in grazing and cultivated in the given periods of 2000, 2010, and 2020, and soil properties revealed such as sand, bulk density, organic carbon, total nitrogen, pH, cation exchange capacity, and exchangeable bases were significantly (<i>P</i> &lt; 0.001) affected by land use and soil depth. The highest content of OC (2.37), Av.P. (3.36), and TN (0.13) was observed on agroforestry land, and the lowest 1.43 and 0.08 was OC and TN respectively. The highest value of soil organic carbon stock (60.2 mg ha<sup>−1</sup>) was observed in AFL. The study suggests the deterioration of soil properties under cultivated and grazing land, emphasizing the importance of sustainable integrated soil fertility management to optimize and maintain favorable soil physicochemical properties.</p></div>","PeriodicalId":476,"journal":{"name":"Arabian Journal of Geosciences","volume":"18 2","pages":""},"PeriodicalIF":1.827,"publicationDate":"2025-01-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s12517-025-12181-w.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143109645","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
Petrological and geochemical studies of highly fractionated I-type granites at Abu Marwa–Abu Harba area, Northern Eastern Desert, Egypt 埃及东北部沙漠Abu Marwa-Abu Harba地区高分选i型花岗岩岩石学与地球化学研究
IF 1.827
Arabian Journal of Geosciences Pub Date : 2025-01-23 DOI: 10.1007/s12517-025-12178-5
Shimaa A. Nasser, Mohamed M. El-Sayed, Hassen I. El Sandouly
{"title":"Petrological and geochemical studies of highly fractionated I-type granites at Abu Marwa–Abu Harba area, Northern Eastern Desert, Egypt","authors":"Shimaa A. Nasser,&nbsp;Mohamed M. El-Sayed,&nbsp;Hassen I. El Sandouly","doi":"10.1007/s12517-025-12178-5","DOIUrl":"10.1007/s12517-025-12178-5","url":null,"abstract":"<div><p>The granite rocks at the Abu Marwa-Abu Harba area, located at the North Eastern Desert, are classified into trondhjemite, syenogranite, and alkali feldspar granite. They are formed through the Neoproterozoic late to post-orogenic period (~ 600 Ma). The common fault trends in the area based on their number and length proportions are NE-SW, ENE-WSW, WNW-ESE, E-W, N-S, NNE-SSW, NNW-SSE, and NW–SE. The study area is characterized by the abundance of joint systems and was divided into shear and tension joints based on their tectonic origin. Mineralogicaly, the trondjhmite consists of plagioclase, quartz, k-feldspar, biotite, and hornblende. On the other hand, the syenogranite and alkali feldspar granite are mineralogicaly similar and composed of plagioclase, quartz, k-feldspar, biotite, and hornblende but the k-feldspar and quartz in the alkali feldspar granites are more abundant relative to the syenogranite. The Abu Marwa-Abu Harba granite rock types are classified as peraluminous, Fe-rich granites with calc-alkaline and highly fractionated I-type affinity. The trondhjemite has a significantly lower content of TiO<sub>2</sub>, CaO, K<sub>2</sub>O, Ba, Rb, Sr, Zr, and ƩREE than the syenogranite and the alkali feldspar granite. The trondhjemite displays a gullwing-shaped REE pattern with deeper negative Eu anomaly while the syenogranite and the alkali feldspar granite are rather smooth and subparallel with negative Eu anomaly. The late orogenic trondjhmite was suggested to be generated by partial melting of the mantle source followed by fractional crystallization of k-feldspar, plagioclase, and apatite phases. On the other hand, the post-orogenic syenogranite and alkali feldspar granite were generated by partial melting of the upper crust at different depths followed by fractional crystallization. The fractionated phases were plagioclase, k-feldspar, biotite, hornblende, apatite, and titanite. In addition, the hydrothermal volatile-rich fluids played a role in the formation and generating of the studied post-orogenic syenogranite and alkali feldspar granite.</p></div>","PeriodicalId":476,"journal":{"name":"Arabian Journal of Geosciences","volume":"18 2","pages":""},"PeriodicalIF":1.827,"publicationDate":"2025-01-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143109199","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
Stability analysis of overburden rocks—a new approach 覆岩稳定性分析——一种新方法
IF 1.827
Arabian Journal of Geosciences Pub Date : 2025-01-22 DOI: 10.1007/s12517-025-12188-3
Subodh Kumar, Kaushik Dey
{"title":"Stability analysis of overburden rocks—a new approach","authors":"Subodh Kumar,&nbsp;Kaushik Dey","doi":"10.1007/s12517-025-12188-3","DOIUrl":"10.1007/s12517-025-12188-3","url":null,"abstract":"<div><p>Overburden dumping is an important issue in consideration of economy and safety for surface mining of coal. The higher slope angle and increased dump height improve the economic benefits, however decrease the stability of the dumps. Dumping methods are classified as (i) end-tipping method and (ii) paddock-dumping method. However, the stability analysis models practised for both the cases are same. The dump slope stability models consider internal friction angle, cohesion and some other properties as the essential parameters affecting the stabilising and destabilising forces. These parameters are significantly changes with the types and sizes of the rock materials. While the dumping methods are different, these properties are changing at different depths of dump. This consideration is missing in the current dump slope stability modelling. This paper focusses on the comparative analysis of stability achieved by forming an overburden dump by an end-dumping approach as well as the paddock approach. From a dump stability analysis, it is found that end dumping exhibits a better factor of safety up to a dump height of 90 m (3 benches of 30 m each) and paddock dumping exhibits better factor of safety than the end-dumping method beyond that and up to a dumb height of 150 m. The paddock-dumping method poses a better factor of safety as compared to the end-dumping method as the number of benches goes up. The reason for higher safety factor in paddock dumping as compared to end dumping may be attribute to the better size distribution and compaction due to machine movements.</p></div>","PeriodicalId":476,"journal":{"name":"Arabian Journal of Geosciences","volume":"18 2","pages":""},"PeriodicalIF":1.827,"publicationDate":"2025-01-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142995769","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
0
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
提示
您的信息不完整,为了账户安全,请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
确定
请完成安全验证×
相关产品
×
本文献相关产品
联系我们:info@booksci.cn Book学术提供免费学术资源搜索服务,方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。 Copyright © 2023 布克学术 All rights reserved.
京ICP备2023020795号-1
ghs 京公网安备 11010802042870号
Book学术文献互助
Book学术文献互助群
群 号:481959085
Book学术官方微信