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Pre-Vegetation Mixed (Wave-Tide) Energy Trangressive Nearshore Sedimentation: Evidence From the Proterozoic Passive Margin Sequence of NW Himalaya, India 前植被混合(波潮)能量海侵近岸沉积:来自印度西北喜马拉雅元古代被动边缘层序的证据
IF 1.4 4区 地球科学
Geological Journal Pub Date : 2024-10-27 DOI: 10.1002/gj.5078
Subhojit Saha
{"title":"Pre-Vegetation Mixed (Wave-Tide) Energy Trangressive Nearshore Sedimentation: Evidence From the Proterozoic Passive Margin Sequence of NW Himalaya, India","authors":"Subhojit Saha","doi":"10.1002/gj.5078","DOIUrl":"https://doi.org/10.1002/gj.5078","url":null,"abstract":"<div>\u0000 \u0000 <p>The coupled evolution of the Earth's atmosphere–biosphere system through time has caused irreversible changes in the geodynamics as well as surface processes and sedimentation patterns. One such significant change took place in sedimentation in the Palaeozoic (i.e., Silurian) by the appearance of vascular vegetation. While the impact of evolving vegetation on the terrestrial fluvial environment has been relatively well documented, vegetation-induced effects down the system in marginal or nearshore marine settings have undergone little study. The Meso- to Neoproterozoic Rautgara Formation exposed in the Himalayan Orogenic Belt of NW India, offers a chance to study a well-preserved fluvial–marine transition to nearshore sedimentation before the appearance of vascular vegetation. A detailed sedimentological analysis identifies six genetically linked facies associations (FA) probably deposited in barrier, back-barrier, and subtidal deltaic environments. Contrary to the other transgressive barrier models (where beach-barrier overlie the back barrier environments), in the present case, wave-dominated barrier deposits mostly occupy the basal part of the stratigraphy. In the middle stratigraphic level, back-barrier deposits lack thick mud flats and show a dominance of sandstone over mudstone. Stacked subtidal sand bar facies association represents the top part of the sequence. Two sequence stratigraphic surfaces, that is, subaerial unconformity and maximum flooding surface, have been identified and the whole succession is interpreted in terms of HST and TST. Barrier and back-barrier sediments are deposited during HST and TST, respectively. Subtidal deltaic system developed in late TST. The lack of frequent interbedding between the barrier and back-barrier facies indicates negligible landward migration of the barrier and demonstrates system stability. The barrier system might have resulted from vertical aggradations akin to modern vegetated systems. The study portrays that sandy barrier systems are common in the Proterozoic. Vegetation and thick mud flats are not always essential for the stability of a barrier-beach system.</p>\u0000 </div>","PeriodicalId":12784,"journal":{"name":"Geological Journal","volume":"60 2","pages":"359-386"},"PeriodicalIF":1.4,"publicationDate":"2024-10-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143438998","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
A Multicriteria Approach for Landslide Hazard Zonation in the Lesser Kumaun Himalaya 小库仑-喜马拉雅地区滑坡灾害区划的多准则方法
IF 1.4 4区 地球科学
Geological Journal Pub Date : 2024-10-23 DOI: 10.1002/gj.5076
Rahul Kumar Verma, Rajesh Singh, Prateek Sharma, Ravi Kumar Umrao, T. N. Singh
{"title":"A Multicriteria Approach for Landslide Hazard Zonation in the Lesser Kumaun Himalaya","authors":"Rahul Kumar Verma,&nbsp;Rajesh Singh,&nbsp;Prateek Sharma,&nbsp;Ravi Kumar Umrao,&nbsp;T. N. Singh","doi":"10.1002/gj.5076","DOIUrl":"https://doi.org/10.1002/gj.5076","url":null,"abstract":"<div>\u0000 \u0000 <p>The socioeconomic prosperity of a region is intricately tied to its infrastructure development, particularly the connectivity provided by highways. Preserving the economic well-being of an area demands meticulous planning and the execution of construction projects with minimal risk. Landslide hazard zonation (LHZ) is a crucial tool for assessing the likelihood of landslide occurrences in specific regions. This study delves into the LHZ of a 171.2 km<sup>2</sup> area, focusing on critical causative factors such as slope inclination and aspect, slope mass material, Land Use/Land Cover (LULC), distance from fault lines, roads, and drainage systems. The classification resulted in four distinct zones along the National Highway (NH-109) stretch from Bhowali to Almora. Notably, the moderate-hazard zone encompasses 60.4% of the area, followed by the high-hazard zone at 24.4%, the low-hazard zone at 11.9%, and the very high-hazard zone at 3.3%. To enhance the reliability of the study, 63 previously identified landslide locations were marked based on diverse sources, including field studies and landslide inventory data from the Geological Survey of India (GSI). In the validation process, 12 past landslide occurrences were situated within the very high-hazard zone, 32 in the high-hazard zone, 18 in the moderate-hazard zone, and only one in the low-hazard zone. The receiver operating characteristic (ROC) curve yielded a commendable quality with a % area under the curve (AUC) of 71.2%. In summary, this research underscores the importance of LHZ in assessing and mitigating landslide risks along a stretch of the NH-109 corridor. The findings provide valuable insights for informed decision-making in infrastructure development and risk management, contributing to the sustainable growth and protection of the region's livelihood.</p>\u0000 </div>","PeriodicalId":12784,"journal":{"name":"Geological Journal","volume":"60 1","pages":"87-103"},"PeriodicalIF":1.4,"publicationDate":"2024-10-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143118546","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Optimising Neural Networks for Enhanced Fracture Density Prediction in Surrounding Rock of Coalbed Methane Reservoir 优化神经网络增强煤层气储层围岩裂缝密度预测
IF 1.4 4区 地球科学
Geological Journal Pub Date : 2024-10-22 DOI: 10.1002/gj.5075
Xinyang Men, Shida Chen, Heng Wu, Bin Zhang, Yafei Zhang, Shu Tao
{"title":"Optimising Neural Networks for Enhanced Fracture Density Prediction in Surrounding Rock of Coalbed Methane Reservoir","authors":"Xinyang Men,&nbsp;Shida Chen,&nbsp;Heng Wu,&nbsp;Bin Zhang,&nbsp;Yafei Zhang,&nbsp;Shu Tao","doi":"10.1002/gj.5075","DOIUrl":"https://doi.org/10.1002/gj.5075","url":null,"abstract":"<div>\u0000 \u0000 <p>Fractures influence the mechanical strength of coal roof and floor, constraining the design of hydraulic fracturing for coalbed methane production. Currently, the predominant approach involves the integration of petrophysical logging with machine learning for fracture prediction. Nevertheless, challenges exist regarding the model's accuracy. In this study, we present a novel approach to predict fracture density. Our method optimises a back-propagation (BP) neural network and utilises principal component analysis for feature extraction. We employ logging parameters (density, compensated neutron and acoustic time difference) obtained from Shouyang Block well SY-1 and fracture density data from electrical imaging logging to construct the FVDC model's dataset. The BP neural network model is optimised using the Sparrow Search algorithm and Tent Chaotic Mapping. The results demonstrate a substantial enhancement over the BP neural network model, with reductions of 80.102% in mean absolute error, 94.182% in mean square error, 75.879% in root mean square error and 79.764% in mean absolute percentage error. When considering accuracy, the optimised model (97.098%) surpasses the support vector regression model (96.478%), the random forest model (94.404%) and the BP neural network model (85.657%). Scalability testing for the optimised model was conducted using data from well SY-2, yielding a remarkable prediction accuracy of 96.775%. This performance exceeds that of the BP neural network (with an accuracy of 85.102%), as well as the random forest and support vector regression models (with accuracies of 91.234% and 90.384%, respectively). These results underscore the potential of well logging and machine learning in FVDC prediction.</p>\u0000 </div>","PeriodicalId":12784,"journal":{"name":"Geological Journal","volume":"60 1","pages":"73-86"},"PeriodicalIF":1.4,"publicationDate":"2024-10-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143118200","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Reply to Comment on “Singh R, Vadlamani R, Bajpai S & Maurya AS (2024) Strontium Isotope Stratigraphy of Marine Oligocene–Miocene Sedimentary Successions of Kutch Basin, Western India. Geological Journal, 1–20. DOI: 10.1002/gj.4961” Singh R, Vadlamani R, Bajpai S和Maurya AS(2024)印度西部Kutch盆地渐新世-中新世海相沉积序列的锶同位素地层学。地质学报,1-20。DOI: 10.1002 / gj.4961”
IF 1.4 4区 地球科学
Geological Journal Pub Date : 2024-10-22 DOI: 10.1002/gj.5074
Rimjhim Singh, Ravikant Vadlamani, Sunil Bajpai, Abhayanand Singh Maurya
{"title":"Reply to Comment on “Singh R, Vadlamani R, Bajpai S & Maurya AS (2024) Strontium Isotope Stratigraphy of Marine Oligocene–Miocene Sedimentary Successions of Kutch Basin, Western India. Geological Journal, 1–20. DOI: 10.1002/gj.4961”","authors":"Rimjhim Singh,&nbsp;Ravikant Vadlamani,&nbsp;Sunil Bajpai,&nbsp;Abhayanand Singh Maurya","doi":"10.1002/gj.5074","DOIUrl":"https://doi.org/10.1002/gj.5074","url":null,"abstract":"<div>\u0000 \u0000 <p>This response addresses the comments made by Saraswati et al. on our recent publication in Geological Journal. In our study, we used a multi-analytical screening approach, including visual, XRD and trace element analysis, to evaluate diagenetic alteration of carbonate shell samples. Contrary to the claims made by Saraswati et al. our findings are based on well-preserved samples with minimal alteration. The Sr-isotope data from the Khari Nadi Formation (23.07–18.09 Ma) are largely consistent with existing biostratigraphic constraints, but suggest a possible extension of the upper age limit into the Burdigalian. Our Sr-isotope ages for the Chhasra Formation (15.11–12.29 Ma) are younger than those suggested previously, based on larger benthic foraminifers, but largely corroborate recent nannoplankton data. As a result of the new age data from Kutch, we suggest that the sedimentation rates, derived from multiple samples, increased significantly from the Oligocene to Miocene. We assert that ‘established’ ages are also subject to refinements as the rock units become amenable to new dating techniques. We welcome any criticism that is constructive, and remain open to any further data that could refine or challenge our interpretations.</p>\u0000 </div>","PeriodicalId":12784,"journal":{"name":"Geological Journal","volume":"59 12","pages":"3381-3384"},"PeriodicalIF":1.4,"publicationDate":"2024-10-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142762619","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Fabrics and Origin of Troctolites in the Keketoukeleke Ultramafic–Mafic Complex, South Altyn Tagh, Northwest China 南阿尔金地区克克图克勒克超镁铁质-镁铁质杂岩中滑石岩的构造与成因
IF 1.4 4区 地球科学
Geological Journal Pub Date : 2024-10-21 DOI: 10.1002/gj.5054
Guojian Geng, Liang Liu, Haijun Xu
{"title":"Fabrics and Origin of Troctolites in the Keketoukeleke Ultramafic–Mafic Complex, South Altyn Tagh, Northwest China","authors":"Guojian Geng,&nbsp;Liang Liu,&nbsp;Haijun Xu","doi":"10.1002/gj.5054","DOIUrl":"https://doi.org/10.1002/gj.5054","url":null,"abstract":"<div>\u0000 \u0000 <p>Troctolite is relatively rare compared with other ultramafic–mafic rocks, but its origins and rheological deformation are significant for understanding melt–rock interactions and fractional crystallization of mafic magmas. The Keketoukeleke ultramafic–mafic complex in the South Altyn Tagh, northwest China, consists mainly of dunite, coarse- and fine-grained troctolite. Based on petrographic observations, major and trace element variations of the dunites and troctolites, and low olivine Zr/Y and Ti/Y ratios, we propose that the troctolites were formed by fractional crystallization and late localized water-bearing melt injection. In addition, the olivine in the dunites has A- and E-type fabrics, whereas the olivine in the troctolites has a weak fabric and plagioclase has a pronounced fabric with the [010] axes aligned subnormal to the foliation and [100] axes subparallel to the lineation. The results suggest that the troctolite rheological deformation was concentrated mainly in plagioclase, and the olivine only underwent grain rotation or grain boundary slip. Furthermore, the dating of baddeleyite in troctolite suggests they crystallized at 378.6 ± 2.3 Ma, suggesting the Keketoukeleke ultramafic–mafic complex emplaced the continental crust extension after deep subduction–exhumation process of South Altyn.</p>\u0000 </div>","PeriodicalId":12784,"journal":{"name":"Geological Journal","volume":"59 12","pages":"3362-3376"},"PeriodicalIF":1.4,"publicationDate":"2024-10-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142762735","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Serpentinised Dunites of the Neoarchean Shimoga Greenstone Belt, Western Dharwar Craton, India: Insights on Ni-PGE Mineralisation and Genesis 印度Dharwar克拉通西部新太古代Shimoga绿岩带蛇纹岩质泥质岩:Ni-PGE矿化及其成因
IF 1.4 4区 地球科学
Geological Journal Pub Date : 2024-10-21 DOI: 10.1002/gj.5071
Th. Dhanakumar Singh, C. Manikyamba, G. Harshitha, M. Lingadevaru, K. S. V. Subramanyam, Arijit Pahari
{"title":"Serpentinised Dunites of the Neoarchean Shimoga Greenstone Belt, Western Dharwar Craton, India: Insights on Ni-PGE Mineralisation and Genesis","authors":"Th. Dhanakumar Singh,&nbsp;C. Manikyamba,&nbsp;G. Harshitha,&nbsp;M. Lingadevaru,&nbsp;K. S. V. Subramanyam,&nbsp;Arijit Pahari","doi":"10.1002/gj.5071","DOIUrl":"https://doi.org/10.1002/gj.5071","url":null,"abstract":"<div>\u0000 \u0000 <p>Ultramafic rocks of the Archean greenstone belts worldwide are potential hosts for Cu-Ni, precious metal deposits like platinum group elements (PGEs) and gold. This study highlights the geochemical evidence and genesis of Ni-PGE mineralisation in the ultramafic rocks of Shimoga greenstone belt of the Western Dharwar Craton, India. Petrographically, the studied rocks are identified to be serpentinised dunites, while their geochemical signatures indicate komatiitic affinity. Presence of disseminated sulphides and pronounced serpentinisation in these rocks suggest a combination of Type II (disseminated sulphides) and Type IV (post-magmatic alterations) komatiite-related Ni–Cu-PGE deposits. Chondritic Al<sub>2</sub>O<sub>3</sub>/TiO<sub>2</sub> (9.65–16.38) ratios, superchondritic Gd/Yb<sub>N</sub> (1.3–1.6), depleted high-field-strength elements (HFSEs) (Zr, Hf), enrichment of LREE over HREE and negative Nb–Ta anomalies reflect the generation of parental melts from plume-sourced Al-depleted komatiites with significant crustal contamination during their emplacement. The major, trace element and PGE relationships (FeO vs. MgO, Cu vs. Pd, Ni/Cu vs. Pd/Ir) infer the origin of sulphur undersaturated primary melts through moderate to higher degrees of partial melting followed by crustal assimilation that led to PGE enrichment. These observations suggest their formation from melts derived from greater depths of the upper mantle (&gt; 400 km) at high pressure (&gt; 10 GPa), wherein, the mantle residue retained majorite garnet. The high Ni (avg. Ni = 6511 ppm) substantiated by high Kambalda ratio ([Ni:Cr] × [Cu:Zn] = 5.6), Ni/Cr ratios (&gt; 1) with high concentration of PGEs (avg. ∑PGE = 3078 ppb) confirm the fertile/mineralised nature of the komatiitic source and potential Ni-PGE mineralization in the ultramafic rocks of the Shimoga greenstone belt.</p>\u0000 </div>","PeriodicalId":12784,"journal":{"name":"Geological Journal","volume":"60 1","pages":"45-63"},"PeriodicalIF":1.4,"publicationDate":"2024-10-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143117762","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Basin–Orogen Coupling-Driven Meso-Cenozoic Deformation Along the Southern Margin of the Junggar Basin, NW China: Insights From Integrated Multidisciplinary Analysis 盆地-造山带耦合驱动的准噶尔盆地南缘中新生代变形:多学科综合分析的启示
IF 1.4 4区 地球科学
Geological Journal Pub Date : 2024-10-21 DOI: 10.1002/gj.5079
Feiyu Zhao, Yanhui Suo, Sanzhong Li, Juzhi Deng, Ke Chen, Ian D. Somerville, Mengxue Dai, Xiao Chen, Bin Hu
{"title":"Basin–Orogen Coupling-Driven Meso-Cenozoic Deformation Along the Southern Margin of the Junggar Basin, NW China: Insights From Integrated Multidisciplinary Analysis","authors":"Feiyu Zhao,&nbsp;Yanhui Suo,&nbsp;Sanzhong Li,&nbsp;Juzhi Deng,&nbsp;Ke Chen,&nbsp;Ian D. Somerville,&nbsp;Mengxue Dai,&nbsp;Xiao Chen,&nbsp;Bin Hu","doi":"10.1002/gj.5079","DOIUrl":"https://doi.org/10.1002/gj.5079","url":null,"abstract":"<div>\u0000 \u0000 <p>The southern margin of the Junggar Basin (SMJB) represents the typical intra-continental basin–orogen coupling structure of the Central Asian Orogenic Belt and is a key area to study the deformation mechanisms and the geodynamic evolution processes of the North Tianshan Orogen. Herein, we compiled data from boreholes, gravity and magnetism, seismicity- and magnetotellurics-derived geological profiles and field data to recover the sedimentary history of the SMJB and discuss the intra-continental deformation driven by the basin–orogen coupling mechanism. The results show that the sedimentary and tectonic evolution of the SMJB were both profoundly controlled by the intra-continental orogeny of the North Tianshan Orogen and its coupling with the Junggar Basin during the Meso-Cenozoic period. Consequently, the SMJB is dominated by thick-skinned thrust nappes accompanied with strike-slip faulting and thrusting. The foreland thrust belt of the SMJB is characterised by three structural belts, from south to north, including the basement-involved thrust belt, the cover-detached foreland thrust-fold belt and the thrusted foreland basement uplifts, respectively. Meanwhile, as indicated by the geometry of the basement thrusts, the thickness of décollements and the structure of the foreland basement, the stress field in the SMJB is obviously stronger in the west and weaker in the east. The sedimentation and deformation migrated northwards into the basin area in a stepwise process, that corresponded to the pace of the overthrusting of the North Tianshan Orogen onto the Junggar Block. Intense regional compression induced the rapid uplifting of the North Tianshan and the significant crustal shortening of the Junggar Block, driving the three structural belts to form accordingly during the Late Jurassic to the Neogene. There are at least one or two décollements within the SMJB, representing one of the main features of basin–orogen coupling structure in most cases. The décollement of some layers represents the decoupling of the sedimentary cover with the basement, which helps to accommodate the lateral crustal shortening of the SMJB by a translation into vertical uplift. As a result, the detached foreland thrust-fold belts in the shallow level of the upper crust overthrusted upon the basement-involved nappes of the mountain's side, forming the opposite thrust system. Coevally, the basement of the basin, in the deep level of the upper crust keeps underthrusting beneath the North Tianshan Orogen, forming a typical crocodile mouth-like structure. In general, both the shallow and deep deformation in the SMJB have been formed by the intense intra-continental compression during the Meso-Cenozoic, which were driven by the basin–orogen coupling mechanism.</p>\u0000 </div>","PeriodicalId":12784,"journal":{"name":"Geological Journal","volume":"59 12","pages":"3214-3239"},"PeriodicalIF":1.4,"publicationDate":"2024-10-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142762738","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
A Comprehensive Review of Remote Sensing Technologies for Improved Geological Disaster Management 遥感技术在地质灾害管理中的应用综述
IF 1.4 4区 地球科学
Geological Journal Pub Date : 2024-10-21 DOI: 10.1002/gj.5072
Sheetal Kumari, Smriti Agarwal, Nitin Kumar Agrawal, Animesh Agarwal, Manoj Chandra Garg
{"title":"A Comprehensive Review of Remote Sensing Technologies for Improved Geological Disaster Management","authors":"Sheetal Kumari,&nbsp;Smriti Agarwal,&nbsp;Nitin Kumar Agrawal,&nbsp;Animesh Agarwal,&nbsp;Manoj Chandra Garg","doi":"10.1002/gj.5072","DOIUrl":"https://doi.org/10.1002/gj.5072","url":null,"abstract":"<div>\u0000 \u0000 <p>Over the past two decades, the frequency of natural hazard incidents has steadily risen, leading to substantial human casualties, infrastructure destruction, societal and economic disruption. The occurrence of disasters, both of natural and human origin, has exhibited an upward trend in frequency over the past few decades on a global scale, posing a significant threat to diverse populations. Over time, remote sensing technologies have proven to be effective in analysing and monitoring diverse natural disasters, including but not limited to droughts, earthquakes, tsunamis, landslides and cyclones. The significant extent of its coverage capacity and the ability to repeat observations make its application economically efficient. This paper aims to elucidate the fundamental contributions and role of remote sensing in disaster management applications. In a comprehensive analysis, this study explores recent practical applications in the context of disaster events. The utilisation of diverse methodologies and functions of remote sensing in disaster monitoring and control is further expanded to encompass the domain of disaster risk management, employing cutting-edge sensors and satellites from emerging technological advancements. This paper also addresses challenges related to disaster monitoring, detection and management. Emergencies, particularly during typical catastrophe scenarios, often witness partial disruptions in communication networks. Consequently, the role of alternative networks becomes paramount in enabling effective disaster detection and management strategies. Emerging issues are highlighted, and potential directions for future research are outlined and also support sustainable development goal 13 (climate action).</p>\u0000 </div>","PeriodicalId":12784,"journal":{"name":"Geological Journal","volume":"60 1","pages":"223-235"},"PeriodicalIF":1.4,"publicationDate":"2024-10-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143117763","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Comment on “Singh R, Vadlamani R, Bajpai S, Maurya AS (2024) Strontium Isotope Stratigraphy of Marine Oligocene–Miocene Sedimentary Successions of Kutch Basin, Western India. Geological Journal, 1–20. DOI: 10.1002/gj.4961” Singh R, Vadlamani R, Bajpai S, Maurya AS(2024)印度西部Kutch盆地渐新世-中新世海相沉积序列锶同位素地层学述评。地质学报,1-20。DOI: 10.1002 / gj.4961”
IF 1.4 4区 地球科学
Geological Journal Pub Date : 2024-10-21 DOI: 10.1002/gj.5069
Pratul Kumar Saraswati, Gianluca Frijia, György Less
{"title":"Comment on “Singh R, Vadlamani R, Bajpai S, Maurya AS (2024) Strontium Isotope Stratigraphy of Marine Oligocene–Miocene Sedimentary Successions of Kutch Basin, Western India. Geological Journal, 1–20. DOI: 10.1002/gj.4961”","authors":"Pratul Kumar Saraswati,&nbsp;Gianluca Frijia,&nbsp;György Less","doi":"10.1002/gj.5069","DOIUrl":"https://doi.org/10.1002/gj.5069","url":null,"abstract":"<div>\u0000 \u0000 <p>This is a comment on the paper of Singh et al. (<i>Geological Journal</i>, 2024:1–20) on Strontium isotope stratigraphy of marine Oligocene–Miocene sedimentary successions of Kutch Basin, western India. Kutch hosts stratotypes of some lithostratigraphic and chronostratigraphic units of India. In this study, the Sr-isotope estimated ages of the studied formations deviate significantly from their known ages based on biostratigraphy. The authors have not validated the interpreted ages with biostratigraphy. We believe a scrupulous screening of samples and validation of Sr-isotope data with biostratigraphy are two essential requirements of Sr-isotope stratigraphy. Unfortunately, Singh et al. made a new contribution to Kutch stratigraphy that falls short of meeting both conditions, leading to incorrect ages of the regional chronostratigraphic units of India.</p>\u0000 </div>","PeriodicalId":12784,"journal":{"name":"Geological Journal","volume":"59 12","pages":"3377-3380"},"PeriodicalIF":1.4,"publicationDate":"2024-10-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142762736","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Late Ordovician Bentonites From the Southern Ordos Basin: Response to the Subduction of the Proto-Tethys Ocean 鄂尔多斯盆地南部晚奥陶世膨润土:对原特提斯洋俯冲的响应
IF 1.4 4区 地球科学
Geological Journal Pub Date : 2024-10-20 DOI: 10.1002/gj.5077
Zuochen Li, Xianzhi Pei, Lei Pei, Youxin Chen, Hao Wang, Hao Lin, Li Qin, Yajie Yang, Shang Ji, Liang'e Chen, Weiyi Hou, Irshad Hussain, Gang Zhang
{"title":"Late Ordovician Bentonites From the Southern Ordos Basin: Response to the Subduction of the Proto-Tethys Ocean","authors":"Zuochen Li,&nbsp;Xianzhi Pei,&nbsp;Lei Pei,&nbsp;Youxin Chen,&nbsp;Hao Wang,&nbsp;Hao Lin,&nbsp;Li Qin,&nbsp;Yajie Yang,&nbsp;Shang Ji,&nbsp;Liang'e Chen,&nbsp;Weiyi Hou,&nbsp;Irshad Hussain,&nbsp;Gang Zhang","doi":"10.1002/gj.5077","DOIUrl":"https://doi.org/10.1002/gj.5077","url":null,"abstract":"<div>\u0000 \u0000 <p>The connection between the Ordovician bentonites on the southern margin of the Ordos Basin and the Early Palaeozoic volcanic rocks of the North Qinling Orogenic Belt is crucial for understanding the subduction and collisional closure of the Shangdan Ocean during the Early Palaeozoic. This paper investigates zircon U–Pb ages, geochemistry and Lu–Hf isotopic compositions of zircons in the Upper Ordovician Zhaolaoyu Formation bentonites located on the southern margin of the Ordos Basin. U–Pb dating of zircon indicates a coeval age of 453.3 ± 1.4 Ma (MSWD = 0.99), which represents the crystallisation age during the Late Ordovician Katian stage. The bentonites exhibit higher SiO<sub>2</sub> (57.94–77.95 wt.%) and Al<sub>2</sub>O<sub>3</sub> (9.21–14.33 wt.%), classifying them within the low-potassium alkali basalt to medium-potassium calc-alkaline series. The parent rock of the bentonites is likely intermediate to felsic volcanic rocks. The rare earth element partitioning curves of the bentonites are right-dipping, with a more pronounced negative Eu anomaly (<i>δ</i>Eu = 0.48–0.67). The zircons in the bentonites yield two-stage model ages ranging from 546 to 956 Ma, along with <i>ε</i>\u0000 <sub>Hf</sub>(<i>t</i>) values between 5.56 and 13.55. These results indicate that the bentonites are products of volcanic arc magma formed in a subduction–collision environment. The interbedded bentonites in the Upper Ordovician limestones of the southern margin of the Ordos Basin may be associated with the northward subduction of the Shangdan Oceanic crust, reflecting the subduction and consumption of the Proto-Tethys Ocean along the southern margin of the North China Block.</p>\u0000 </div>","PeriodicalId":12784,"journal":{"name":"Geological Journal","volume":"60 1","pages":"104-132"},"PeriodicalIF":1.4,"publicationDate":"2024-10-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143117622","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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