Arabian Journal of Geosciences最新文献

Drainage basin analysis of Sunai River, Odisha, India: A remote sensing and GIS-based approach 印度奥里萨邦苏奈河流域分析：基于遥感和gis的方法

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Arabian Journal of Geosciences Pub Date : 2025-10-10 DOI: 10.1007/s12517-025-12328-9

Pawan Kumar Gautam, Dhirendra Kumar, Satyajit Sahu, Anoop Kumar Singh

{"title":"Drainage basin analysis of Sunai River, Odisha, India: A remote sensing and GIS-based approach","authors":"Pawan Kumar Gautam, Dhirendra Kumar, Satyajit Sahu, Anoop Kumar Singh","doi":"10.1007/s12517-025-12328-9","DOIUrl":"10.1007/s12517-025-12328-9","url":null,"abstract":"<div><p>The Sunai River, a right-bank tributary of the Budhabalanga River in Odisha, originates near Siriapal village in Mayurbhanj district and confluences with the Budhabalanga near Dolagohira village in Baleshwar district, Odisha. The basin, categorized as a 7th order system, covers an area of 1,432.26 km<sup>2 </sup>and a basin length of 63.63 km. The mean stream length ratio (14.06) reflects an advanced stage of erosion and high runoff conditions, indicating active fluvial processes. A bifurcation ratio of 3.85 suggests a stable tectonic setting, while a drainage density of 2.27 km/km<sup>2</sup> indicates moderate to long overland flow. The drainage texture (6.47) and stream frequency (2.85) point to low infiltration and high surface runoff, increasing susceptibility to erosion. Moreover, the low drainage intensity value (1.25) shows a higher vulnerability to soil erosion, likely exacerbated by sparse vegetation or unconsolidated surface material. Morphometric shape indices form factor (0.35), elongation ratio (0.67), and circulatory ratio (0.35) reveal the basin’s elongated form, which can influence flow concentration and flood risk. The low RHO coefficient (0.15) suggests limited water storage during heavy discharge periods, contributing to flash flood vulnerability. The region exhibits steep slopes and significant elevation variation on the basis of basin relief (1,151 m) and a high relief ratio (18.09). Despite this, the ruggedness number (2.61) reflects a relatively smooth and moderately dissected terrain. The analysis highlights the basin’s dynamic runoff and stream flow behavior, emphasizing the urgent need for integrated and sustainable watershed management strategies to counteract environmental degradation and hydro-geomorphological challenges.\u0000</p></div>","PeriodicalId":476,"journal":{"name":"Arabian Journal of Geosciences","volume":"18 11","pages":""},"PeriodicalIF":1.827,"publicationDate":"2025-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145256503","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

Large-scale experimental study on seepage erosion characteristics of the deep alluvial sandy and glacial gravel at Xiaqu hydropower station 下渠水电站深层冲积砂和冰川砾石渗流侵蚀特性的大型试验研究

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Arabian Journal of Geosciences Pub Date : 2025-10-10 DOI: 10.1007/s12517-025-12351-w

Wei Zhou, Rongtao Xie, Bo Zhang, Weibo Wang, Gang Wang

{"title":"Large-scale experimental study on seepage erosion characteristics of the deep alluvial sandy and glacial gravel at Xiaqu hydropower station","authors":"Wei Zhou, Rongtao Xie, Bo Zhang, Weibo Wang, Gang Wang","doi":"10.1007/s12517-025-12351-w","DOIUrl":"10.1007/s12517-025-12351-w","url":null,"abstract":"<p>The Xiaqu Hydropower Station is a large hydroelectric project in western China. The right abutment of its dam comprises deep soil strata, with the underlying layers being a glacial gravelly soil layer and an alluvial sandy soil layer. Given that glacial gravel is typically internally unstable soil, significant concerns have been raised regarding the long-term safety against seepage erosion risks. To investigate this, a large-scale seepage apparatus was utilized to study the internal erosion behavior of the glacial soil layer as well as the contact erosion behavior between the alluvial and glacial soil layers under high surcharge pressures. The test results demonstrated that when the hydraulic gradient surpassed 0.1 to 0.2, the glacial soil exhibited pronounced fine particle loss, which corroborated the geometric criteria-based judgment of its internal instability. Moreover, it was found that increasing the surcharge pressure could partially alleviate the extent of internal erosion. In contrast, despite the geometric criteria suggesting a low likelihood of contact erosion, it was, in fact, observed during the large-scale experiments. This was due to the severe internal erosion within the glacial gravel, which altered its gradation and subsequently enlarged the void constrictions. These findings underscore the crucial importance of conducting seepage erosion tests to validate the contact erosion characteristics beyond mere reliance on geometric criteria. The test results thereby provided valuable reference for the selection of seepage erosion control measures and the evaluation of seepage erosion safety for the project.</p>","PeriodicalId":476,"journal":{"name":"Arabian Journal of Geosciences","volume":"18 11","pages":""},"PeriodicalIF":1.827,"publicationDate":"2025-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145256219","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

Diagenetic perspectives from C–O–Sr isotopes in Early Cambrian carbonates: implications for reservoir evolution in the Buah Formation, Jabal Akhdar and Huqf regions, Oman 阿曼Jabal Akhdar和Huqf地区早寒武世碳酸盐岩C-O-Sr同位素成岩作用及其对Buah组储层演化的启示

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Arabian Journal of Geosciences Pub Date : 2025-10-10 DOI: 10.1007/s12517-025-12331-0

Arshad Ali, Mohamed El-Ghali, Tomoyuki Shibata, Masako Yoshikawa, Mohamed Moustafa, Iftikhar Abbasi, Leonardo Brandão Nogueira

{"title":"Diagenetic perspectives from C–O–Sr isotopes in Early Cambrian carbonates: implications for reservoir evolution in the Buah Formation, Jabal Akhdar and Huqf regions, Oman","authors":"Arshad Ali, Mohamed El-Ghali, Tomoyuki Shibata, Masako Yoshikawa, Mohamed Moustafa, Iftikhar Abbasi, Leonardo Brandão Nogueira","doi":"10.1007/s12517-025-12331-0","DOIUrl":"10.1007/s12517-025-12331-0","url":null,"abstract":"<div><p>The Buah Formation, a key carbonate unit within the Huqf Supergroup of Oman, was deposited during the latest Ediacaran to early Cambrian (~ 541–530 Ma) and is well-exposed in the Jabal Akhdar (JA) and Huqf regions. These carbonates offer critical insights into early Cambrian diagenetic processes and serve as valuable records for geochemical and isotopic investigations. Samples from both regions were analyzed for carbon, oxygen, and strontium isotopes, along with elemental ratios using multiple mass spectrometry techniques. JA samples exhibit a broader and more variable range of δ<sup>13</sup>C and δ<sup>18</sup>O values compared to the more constrained values in Huqf, reflecting more extensive diagenetic overprinting. Positive δ<sup>13</sup>C–δ<sup>18</sup>O correlations in both regions indicate diagenetic alteration by meteoric and/or burial fluids. In the JA section, δ<sup>13</sup>C values as low as − 8‰ at lower stratigraphic levels likely result from the oxidation of Neoproterozoic organic carbon, releasing <sup>12</sup>C-enriched DIC, a signature consistent with the Ediacaran Shuram excursion in the underlying Shuram Formation. Mn/Sr ratios distinguish diagenetic systems, with burial diagenesis and/or organic carbon oxidation dominating in JA, and meteoric diagenesis prevailing in Huqf. Strontium concentrations in Huqf samples range from 20 to 2600 ppm, with most exhibiting uniform <sup>87</sup>Sr/<sup>86</sup>Sr ratios (~ 0.7088), outside typical marine dolomite values. A subset aligns with marine signatures, suggesting mixed Sr sources including terrigenous, hydrothermal, and weathering-derived inputs. Two δ<sup>13</sup>C-based sample populations (< 0.5‰ and ≥ 0.5‰) in Huqf highlight diagenetic variability with implications for reservoir quality, fluid migration, and source preservation in early Cambrian petroleum systems in Oman.</p></div>","PeriodicalId":476,"journal":{"name":"Arabian Journal of Geosciences","volume":"18 11","pages":""},"PeriodicalIF":1.827,"publicationDate":"2025-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145256275","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

A modified method for evaluating hydraulic conductivities from on-the-fly piezocone sounding 一种改进的动态压锥测深水力传导性评价方法

IF 1.827

Arabian Journal of Geosciences Pub Date : 2025-10-10 DOI: 10.1007/s12517-025-12339-6

Jia-Bin Li, Ming-Guang Li, Xiao Xiao, Lei Han, Jin-Hui He

{"title":"A modified method for evaluating hydraulic conductivities from on-the-fly piezocone sounding","authors":"Jia-Bin Li, Ming-Guang Li, Xiao Xiao, Lei Han, Jin-Hui He","doi":"10.1007/s12517-025-12339-6","DOIUrl":"10.1007/s12517-025-12339-6","url":null,"abstract":"<div><p>Engineering practices have shown that the accurate assessment of stratum hydraulic conductivity (SHC) is crucial for ensuring engineering safety. A method proposed by Elsworth and Lee (2005) based on on-the-fly piezocone sounding provides an effective approach to SHC evaluation, but previous studies overlooked SHC anisotropy. The literature review reveals that the anisotropy ratio (horizontal-to-vertical SHC) typically ranges between 1.1 and 2.7 for most sedimentary formations, reflecting moderate but consistent directional dependence in SHC. This study addresses this limitation by incorporating SHC anisotropy into the original assumptions and further explicitly considers the effect of OCR. To validate the efficacy of this modified method, two case histories are examined. The results indicate that the predicted SHCs obtained using the modified method are in closer agreement with measured values compared to previous methods. The influence of SHC anisotropy and OCR on predicted SHCs cannot be disregarded, and the modified assumptions demonstrate a stronger correlation with engineering outcomes.</p></div>","PeriodicalId":476,"journal":{"name":"Arabian Journal of Geosciences","volume":"18 11","pages":""},"PeriodicalIF":1.827,"publicationDate":"2025-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145256504","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

Optimization of borehole layout in equal-diameter empty hole parallel cut blasting 等直径空孔平行切孔爆破钻孔布置优化

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Arabian Journal of Geosciences Pub Date : 2025-10-10 DOI: 10.1007/s12517-025-12341-y

Yi-ming Sheng, Li Wu, Guang-jin Liu, Yao Cheng

{"title":"Optimization of borehole layout in equal-diameter empty hole parallel cut blasting","authors":"Yi-ming Sheng,  Li Wu, Guang-jin Liu, Yao Cheng","doi":"10.1007/s12517-025-12341-y","DOIUrl":"10.1007/s12517-025-12341-y","url":null,"abstract":"<div><p>Cut blasting is a critical technique in roadway excavation, where the layout of cut holes directly affects the quality of excavation blasting. Based on the engineering context of phosphate mining in Hubei Province, this study first analyzed the effects of blasting gases and stress waves according to rock blasting mechanics, derived the calculation formula for the fracture zone radius, and determined the optimal distance between cut holes and empty holes. Subsequently, based on the calculated optimal distance, two empty hole layouts were designed: a six-empty-hole pattern and an eight-empty-hole pattern. Using ANSYS/LS-DYNA software, the effectiveness of cut blasting under these different layouts was analyzed from the perspectives of surrounding rock damage, dynamic evolution of the stress field, and extent of the cut cavity, followed by validation through field experiments. The results indicate that the optimal hole spacing between cut holes and empty holes is 170 mm, and that at the same distance, empty holes arranged at 45° generate greater circumferential (hoop) stress compared to those arranged horizontally. Furthermore, when sufficient compensation space cannot be provided, it is advisable to appropriately reduce the hole spacing, thereby reducing the rock volume between cut holes and empty holes to allow adequate expansion space for the rock.</p></div>","PeriodicalId":476,"journal":{"name":"Arabian Journal of Geosciences","volume":"18 11","pages":""},"PeriodicalIF":1.827,"publicationDate":"2025-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145256623","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

Evaluate digital surface model for cultural heritage documentation based on close-range photogrammetry 评估基于近景摄影测量的文化遗产文献数字表面模型

IF 1.827

Arabian Journal of Geosciences Pub Date : 2025-10-02 DOI: 10.1007/s12517-025-12340-z

Shireen Younus Ismael, Farsat Heeto Abdulrahman

{"title":"Evaluate digital surface model for cultural heritage documentation based on close-range photogrammetry","authors":"Shireen Younus Ismael, Farsat Heeto Abdulrahman","doi":"10.1007/s12517-025-12340-z","DOIUrl":"10.1007/s12517-025-12340-z","url":null,"abstract":"<div><p>Documentation of historic structures is widely recognized as an initial and crucial step in safeguarding tangible cultural heritage. Capturing and preserving detailed information (geometry and any architectural ornamental features) of these structures can ensure long-term conservation and provide valuable resources for research, education, and future conservation efforts. Selecting appropriate methods and techniques for documentation to create a comprehensive 3D representation of the historic structure is always a subject of research, and it is a challenging issue, specifically if the site is in an area with security concerns. This research aims to evaluate the Digital Surface Model of the Minaret of Amedy, a heritage site that is nationally registered. The data collection process was planned and executed, involving an e-survey GNSS receiver for measuring ground control points and a total station (TS, Leica TS06) for measuring control points on the four sides of the Minaret. Two hundred three images were taken by UAV, DJI Phantom 4 pro manually flown, and 196 images using Nikon D5300. The data was processed using the Agisoft Metashape photogrammetry software to create the final 3D Surface model and orthophotos. The RMS errors gained from UAV orthophotos are presented relative to the TS. Sub-centimeter accuracy for horizontal and vertical positions was obtained at low flight altitudes. The 3D digital models’ accuracy of the Minaret was assessed using conventional survey measurements, resulting in a maximum standard deviation in the coordinates of ±2.4 cm. The relative accuracy in distance measurement ranged from 0.00% to 0.20% and 0.00% to 0.30% in the horizontal and vertical directions, respectively. In addition, the maximum inclination of the Minaret in the East and West direction is about 18 cm and 13 cm, respectively, which were observed. These results reveal that the finding is valuable for future intervention and further research.\u0000</p></div>","PeriodicalId":476,"journal":{"name":"Arabian Journal of Geosciences","volume":"18 10","pages":""},"PeriodicalIF":1.827,"publicationDate":"2025-10-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145210224","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

Orbital-scale depositional controls and reservoir heterogeneity in the Dengying formation in Northern Yunnan and Guizhou 滇黔北地区灯影组轨道尺度沉积控制与储层非均质性

IF 1.827

Arabian Journal of Geosciences Pub Date : 2025-09-30 DOI: 10.1007/s12517-025-12336-9

Honglin Shu, Qingsong Cheng, Cheng Liu, Gaocheng Wang, Jinsong Wang

{"title":"Orbital-scale depositional controls and reservoir heterogeneity in the Dengying formation in Northern Yunnan and Guizhou","authors":"Honglin Shu, Qingsong Cheng, Cheng Liu, Gaocheng Wang, Jinsong Wang","doi":"10.1007/s12517-025-12336-9","DOIUrl":"10.1007/s12517-025-12336-9","url":null,"abstract":"<div><p>Based on preliminary seismic and drilling studies suggesting substantial thickness of the Dengying Formation in the Taiyang-Changning area along the southern margin of the Sichuan Basin's Northern Yunnan and Guizhou Depression as a platform margin, the risk exploration well TT1 was implemented to investigate sedimentary reservoir characteristics and exploration potential of the Dengying platform margin. Integrated analysis of astrochronological cycles, core tests, and log interpretations from the TT1 well enabled comprehensive 3D seismic interpretation of the Dengying Formation in the Taiyang area. Results demonstrate that Milankovitch cycles are extractable from calcium-element logging data of the TT1 well's Dengying Formation, with sedimentation controlled by a 35-kyr obliquity cycle at rates ranging from 6.24 to 13.17 cm/ka (mean: 9.81 cm/ka). Comparative analysis with the Yang-1 well at the same platform margin reveals well-developed reservoirs in the Yang-1 well's Dengying Formation, whereas the TT1 well exhibits overall poor reservoir development—only thin reservoirs occurring at the tops of the Deng-4 and Deng-2 Members—showing no correlation between reservoir presence and sedimentation rates, indicating dominant control by dissolution during the late Tongwan Movement. Integrated regional geological and seismic interpretation indicates that although the Changning-Taiyang platform margin features considerable stratigraphic thickness, the strong reservoir heterogeneity necessitates re-evaluation of reservoir formation and hydrocarbon accumulation mechanisms in the Dengying Formation..</p></div>","PeriodicalId":476,"journal":{"name":"Arabian Journal of Geosciences","volume":"18 10","pages":""},"PeriodicalIF":1.827,"publicationDate":"2025-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145210566","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

Evaluation on ground movements induced by shield tunneling considering shallow and deep buried depth in clays 考虑粘土浅埋深和深埋深的盾构隧道地表移动评价

IF 1.827

Arabian Journal of Geosciences Pub Date : 2025-09-30 DOI: 10.1007/s12517-025-12297-z

Changfu Huang, Yinong Hao, Shaohua Li, Anjie Li, Zhonghua Zhao, Yangyang Han, Yunjuan Jiang, Zhiguo Zhang

引用次数: 0

Campanian alluvial processes in SW Anambra Basin, Nigeria: insights from sedimentology and lithofacies analysis of the Lokoja Formation 尼日利亚西南部阿南布拉盆地坎帕期冲积过程：来自Lokoja组沉积学和岩相分析的见解

IF 1.827

Arabian Journal of Geosciences Pub Date : 2025-09-30 DOI: 10.1007/s12517-025-12334-x

Aitalokhai Joel Edegbai, Obehiye Precious Eigbiluese, Frances Osayamen Edosomwan

{"title":"Campanian alluvial processes in SW Anambra Basin, Nigeria: insights from sedimentology and lithofacies analysis of the Lokoja Formation","authors":"Aitalokhai Joel Edegbai, Obehiye Precious Eigbiluese, Frances Osayamen Edosomwan","doi":"10.1007/s12517-025-12334-x","DOIUrl":"10.1007/s12517-025-12334-x","url":null,"abstract":"<div><p>Strata of the Campanian to mid-Maastrichtian Lokoja Formation exposed on road cuts in the Benin Flank, Anambra Basin, Nigeria, were subjected to facies analysis, visual textural analysis, sieve analysis, and pebble morphometry. The aim was to decipher the nature, transport mechanisms, and paleodepositional environment. Four distinct lithofacies—L1, L2, L3, and L4—were identified. Observed data show L1 and L2 as normally graded, poorly sorted trough cross-bedded, and planar cross-bedded matrix-supported gravels, respectively, which were categorized as gravel bars and bedforms lithofacies association representing braided streamflow paleodepositional processes. Similarly, L3 is described as poorly-moderately sorted normally graded planar cross-bedded sand, while L4 shows intercalations of thin beds of mud and sand. L3 and L4 were thereafter characterized as laminated sheet sand and mud lithofacies association depicting sheetflood paleodepositional processes. The braided streamflow and sheetflood paleodepositional processes are hypothesized to depict a middle-outer alluvial fan gross depositional environment. This inference is supported by binary discriminant plots of parameters from statistical analysis of granulometry data from 12 representative samples and pebble morphometry data obtained from 111 gravels from L1 and L2. Furthermore, paleocurrent data, textural analysis, and mineralogy of framework depict textural immaturity and low compositional maturity, which indicate first-cycle sedimentation, sourced from the Precambrian rocks of the Igarra Schist Belt, north of the study area. This contribution reinforces the multiple sediment provenance hypothesis of the Anambra Basin, comprising Precambrian basement and pre-Santonian rocks.</p></div>","PeriodicalId":476,"journal":{"name":"Arabian Journal of Geosciences","volume":"18 10","pages":""},"PeriodicalIF":1.827,"publicationDate":"2025-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145210992","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

Geochemistry and Sm–Nd isotope characteristics of the Neoarchean I- and S-type granitoids of Nalgonda region, Eastern Dharwar Craton, India: petrogenesis and geodynamic implications 印度东Dharwar克拉通Nalgonda地区新太古代I型和s型花岗岩的地球化学特征及Sm-Nd同位素特征：岩石成因及其地球动力学意义

IF 1.827

Arabian Journal of Geosciences Pub Date : 2025-09-30 DOI: 10.1007/s12517-025-12329-8

Soumya Shukla, Ntieche Benjamin, Ntoumbe Mama, Ilouga Dieudonne Charles Isidore, Mounjouohou Mahomed Aziz, Wokwenmendam Nguet Pauline, Nchouwet Zakari

{"title":"Geochemistry and Sm–Nd isotope characteristics of the Neoarchean I- and S-type granitoids of Nalgonda region, Eastern Dharwar Craton, India: petrogenesis and geodynamic implications","authors":"Soumya Shukla, Ntieche Benjamin, Ntoumbe Mama, Ilouga Dieudonne Charles Isidore, Mounjouohou Mahomed Aziz, Wokwenmendam Nguet Pauline, Nchouwet Zakari","doi":"10.1007/s12517-025-12329-8","DOIUrl":"10.1007/s12517-025-12329-8","url":null,"abstract":"<div><p>Situated in the Eastern Dharwar Craton, the Nalgonda granitoid suites consist of Tonalite Trondhjemite Granodiorite (TTG), biotite and two-mica granites, sanukitoids and hybrid granites. The petrography, whole-rock geochemistry and the Sm–Nd isotope geochemistry of the studied granitoids were done. The rocks are mainly made up of quartz, K-feldspar, plagioclase and biotite ± apatite. The biotite and two-mica granites are exclusively peraluminous in nature with S-type affinity, while the sanukitoids and the hybrid granites display both the I- and S-type characters with the metaluminous and peraluminous nature. The studied granitoids present negative anomalies in Nb–Ta, Pb and Ti suggesting the arc environment and the possible involvement of the subducted crust component to their formation. The isotope geochemistry results indicate heterogeneous source characteristics for the studied granitoids. The biotite and two-mica granites are from typical felsic crustal source, while the sanukitoids and the hybrid granites are from mixed older mafic crustal source with mantle component. The hybrid granites are formed due to interactions between the biotite and two-mica granites, the sanukitoids and the TTG. The geochemical and isotope systematics support a two-stage emplacement model for the Nalgonda granitoids as in the entire Eastern Dharwar Craton. The first stage is long process forming the TTG basement, and the second stage is short process generating the other three variants. This implies that, the subduction-collision tectonic setting is the principal tectonic model that permitted the emplacement of the Nalgonda granitoids.</p></div>","PeriodicalId":476,"journal":{"name":"Arabian Journal of Geosciences","volume":"18 10","pages":""},"PeriodicalIF":1.827,"publicationDate":"2025-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145210993","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