Geological Journal最新文献

{"title":"Genesis of the Bailingshan Iron Deposit in Eastern Tianshan, NW China: Constraints From Geology, Geochemistry and Isotopic Compositions","authors":"Hui Zhang,&nbsp;Yin-Hong Wang,&nbsp;Kang Wang,&nbsp;Wei Zhang,&nbsp;Wen-Xin Gu,&nbsp;Wen-Xuan Xia","doi":"10.1002/gj.5150","DOIUrl":"https://doi.org/10.1002/gj.5150","url":null,"abstract":"<div>\u0000 \u0000 <p>The Bailingshan deposit is located in the Yamansu arc in eastern Tianshan, NW China. As an economically significant iron deposit in the region, Bailingshan is spatially and temporally associated with volcanism and is hosted in the submarine volcanic and volcaniclastic rocks of the Middle Carboniferous Matoutan Formation, suggesting a potential genetic relationship. The trace element compositions of the major ore mineral (magnetite) from iron ores show lower Ga (1.99–10.80 ppm), Zn (10.0–42.8 ppm), V (9.8–17.3 ppm), Ti (21.2–77.8 ppm) and Cr (10.6–31.3 ppm), but higher Ni (21.0–92.8) and Ni/Cr (1.39–5.89). Together with an evaluation of the morphology of orebody, ore fabrics and petrology, we correlate the iron mineralisation at the Bailingshan area with the hydrothermal process. The δ¹⁸O values of magnetite span from −1.5‰ to 3.5‰, while the δ³⁴S values of pyrite sulphides range from 1.7‰ to 7.6‰, demonstrating a wide variation, which suggests that the source components of the ore-forming materials originated from a mixture of magma and seawater. In addition, the Pb isotopic compositions of pyrite are similar to those of igneous rocks (e.g., dacitic tuff and granodiorite) at Bailingshan, suggesting a common Pb isotope origin. Based on the results of this study, it is proposed that primary magmatic-hydrothermal fluids, which interacted with infiltrating seawater, played a crucial role in the significant iron mineralisation observed at Balingshan.</p>\u0000 </div>","PeriodicalId":12784,"journal":{"name":"Geological Journal","volume":"60 7","pages":"1638-1652"},"PeriodicalIF":1.4,"publicationDate":"2025-01-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144635618","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}

{"title":"Early Cretaceous W–Nb–Ta Mineralisation in the Southeastern Xingmeng Orogenic Belt, NE China: Geochronological Evidence From the Jiabusi Nb–Ta and Narewula W Deposits","authors":"Rongzhen Zhang,&nbsp;Xi Diao,&nbsp;Dehui Zhang,&nbsp;Zhu Li,&nbsp;Penglong Zhu,&nbsp;Lin Li,&nbsp;Li Wang","doi":"10.1002/gj.5141","DOIUrl":"https://doi.org/10.1002/gj.5141","url":null,"abstract":"<div>\u0000 \u0000 <p>The Xianghuangqi region in the southeastern section of the Xingmeng Orogenic Belt (XMOB) has gained attention for its potential rare mineral yield, particularly from multiple W and Nb–Ta deposits. However, limited geochronological data limits our understanding of their origin and progress in W–Nb–Ta exploration. We thus performed ⁴⁰Ar/³⁹Ar muscovite and U–Pb wolframite, cassiterite and columbite dating on the Jiabusi Nb–Ta and Narenwula W deposits within the Xianghuangqi region. Our findings revealed that the ⁴⁰Ar/³⁹Ar plateau age of muscovite from the Jiabusi deposit (135.17 ± 1.34 Ma) aligns with that of the Narenwula W deposit (135.83 ± 1.43 Ma). This consistency is further supported by U–Pb dating of wolframite, cassiterite and columbite in Jiabusi, at 136.4 ± 2.0, 132.1 ± 3.1 and 136.0 ± 3.5 Ma, respectively. These data suggest that mineralisation of W–Nb–Ta in the Xianghuangqi area occurred during the Early Cretaceous, probably in association with the late-stage evolution of intrusions within the granite complex. Zircon U–Pb dating of Jiabusi albite granites yielded an age of 137.5 ± 1.2 Ma, indicating later formation than the Kusigui biotite granites, which date at approximately 149 Ma in the same region. The geochronological data highlight a regional Early Cretaceous event of W–Nb–Ta mineralisation around 135 Ma, influenced by tectonic interactions between the Mongolia–Okhotsk Ocean and the Paleo-Pacific Plate. We conclude that, most probably, W–Nb–Ta ore deposits of the southeastern segment of the XMOB in the Xianghuangqi area were emplaced during the Early Cretaceous.</p>\u0000 </div>","PeriodicalId":12784,"journal":{"name":"Geological Journal","volume":"60 7","pages":"1539-1558"},"PeriodicalIF":1.4,"publicationDate":"2025-01-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144635574","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}

{"title":"Numerical Simulation of Overburden Deformation Mechanism and Surface Settlement Characteristics Induced by Underground Coal Mining: A Case Study","authors":"Qihang Li,&nbsp;Yunmin Wang,&nbsp;Jiawen Wang,&nbsp;Bin Gong,&nbsp;Xiaoshuang Li","doi":"10.1002/gj.5149","DOIUrl":"https://doi.org/10.1002/gj.5149","url":null,"abstract":"<div>\u0000 \u0000 <p>Underground mining in mountainous regions presents a significant geological hazard, characterised by the occurrence of land subsidence and movement of overlying strata. To aggrandise the theory of mine rock mechanics, we conducted a systematic investigation into the deformation and failure mechanisms of overlying strata as well as the patterns of surface subsidence in mountainous regions. With the method of engineering mechanics and theoretical analysis, supplemented by the universal distinct element code (UDEC) numerical simulation, the mining status of Songzao mine was simulated effectively. Herein, the results revealed that the nonlinearity of the overlying strata failure field occurred during mining, as evidenced by an increase in the failure field when the coal approached the seam roof. The subsidence curve of the underlying lower strata exhibits an inverted trapezoid pattern, while that of the overlying upper overburden displays a funnel-shaped trend. Additionally, the upward transmission displacement velocity was significantly attenuated due to the shielding effect exerted by the key stratum in the overburden, resulting in a greater spatial separation from the underlying strata. The critical stratum fractures as the working face advanced to 120 m, subsequently leading to an increase in vertical displacement and cessation of surface subsidence. The surface subsidence value and speed, however, exhibited a gradual increase as the coal seam mining progressed. Due to the influence of mountain surface landforms, the subsidence value of convex landforms surpasses that of concave landforms, thereby expediting the rate of subsidence and resulting in geological hazards.</p>\u0000 </div>","PeriodicalId":12784,"journal":{"name":"Geological Journal","volume":"60 7","pages":"1622-1637"},"PeriodicalIF":1.4,"publicationDate":"2025-01-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144635572","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}

{"title":"Eco-Transformation: Shaping the Future of Manufacturing With Green Technologies and Cleaner Production-Practices","authors":"Arsalan Zahid Piprani,&nbsp;Sajid Nazir,&nbsp;Wai Chuen Poon,&nbsp;Mahmood Ali,&nbsp;Shehnaz Tehseen","doi":"10.1002/gj.5137","DOIUrl":"https://doi.org/10.1002/gj.5137","url":null,"abstract":"<div>\u0000 \u0000 <p>In recent years, we have seen a manifold increase in natural calamities resulting from the continual degradation of our environment. The overuse of fossil fuels and other natural resources has contributed towards increasing global warming. This research investigates the environmental challenges posed by the overuse of natural resources and the subsequent carbon footprint. It emphasises the critical need for green technology and cleaner production practices to overcome environmental challenges. Focusing on developing countries, it investigates the effects of green technology and cleaner production-practices on energy efficiency, waste reduction and corporate sustainability in Pakistan's manufacturing industry. Through a cross-sectional analysis, it investigates the influence of sustainable practices on corporate sustainability in diverse manufacturing sectors. The findings reveal a positive correlation between the adoption of green technology and cleaner production-practices and a reduction in energy consumption, highlighting the significant role of resource commitment in enhancing the effectiveness of green technologies. However, the study notes a lack of significant impact of green technology on waste reduction and the broader concept of corporate sustainability, while cleaner production-practices show a beneficial influence on sustainability measures. This study contributes to the understanding of sustainable practices in emerging economies and underscores the importance of top management support and resource allocation in achieving environmental and economic sustainability goals.</p>\u0000 </div>","PeriodicalId":12784,"journal":{"name":"Geological Journal","volume":"60 6","pages":"1474-1487"},"PeriodicalIF":1.4,"publicationDate":"2025-01-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144207036","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}

{"title":"Assessing Thermal Gradients Across Archean Stratigraphy Using Raman Spectra of Carbonaceous Material Thermometry and Mineral Chemistry in the Western Dharwar Craton, India","authors":"Lakshmanan Sreehari,&nbsp;Sasidharan Kiran,&nbsp;Tomokazu Hokada,&nbsp;Madhusoodhan Satish-Kumar,&nbsp;Tsuyoshi Toyoshima,&nbsp;Krishnan Sajeev,&nbsp;Perumal Rajkumar,&nbsp;Justin K. Antony","doi":"10.1002/gj.5135","DOIUrl":"https://doi.org/10.1002/gj.5135","url":null,"abstract":"<p>This study investigates the metamorphic evolution of the Chitradurga Schist Belt (CSB) in the Western Dharwar Craton, India, emphasising its relationship with tectonic processes. Due to the limited availability of ideal mineral assemblages for calculating metamorphic temperatures, we selected metasedimentary rocks containing carbonaceous material (CM) from each stratigraphic unit in the CSB to understand the tectono-metamorphic evolution. Raman spectra of carbonaceous material (RSCM) thermometry was integrated with mineral chemical analyses to elucidate the regional metamorphic conditions. These findings were then coupled with the microstructural evolution and deformation history of the CSB to clarify the tectonic evolution of the terrane. Our findings reveal a distinct metamorphic gradient, with the Bababudan Group exhibiting amphibolite-facies metamorphism at temperatures exceeding 500°C. Other stratigraphic units in the study area recorded greenschist-facies metamorphism at temperatures below 450°C. Detailed examinations of metamorphic mineral assemblages align with RSCM temperature estimates; hornblende is a major constituent in the Bababudan Group and is replaced by actinolite and chlorite during D₂ or D₃ deformation. Hydrous minerals such as muscovite and chlorite are distributed across all stratigraphic units, appearing along S₂ or S₃ foliation. The metamorphism in the Bababudan Group is likely linked to the early stages of collisional events/metamorphism of pre-rift sequences. In contrast, the pervasive hydration and lower-grade metamorphism are associated with the later stages of hinterland-thrust belt formation. This study highlights the significant influence of plate tectonic processes on regional-scale metamorphism and deformation in the Meso-Neoarchean Dharwar Craton.</p>","PeriodicalId":12784,"journal":{"name":"Geological Journal","volume":"60 2","pages":"560-581"},"PeriodicalIF":1.4,"publicationDate":"2025-01-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/gj.5135","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143438987","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Identification of Astronomical Cycles in Fine-Grained Rocks and Their Application in High-Resolution Stratigraphic Correlation: A Case Study of the Fourth Member of the Shahejie Formation in the Leijia Area, Western Sag of the Liaohe Depression, China","authors":"Yang Li,&nbsp;Xiaoguang Li,&nbsp;Tingshan Zhang,&nbsp;Chang Chen,&nbsp;Jinpeng Li,&nbsp;Peng Lai,&nbsp;Yang Gao","doi":"10.1002/gj.5140","DOIUrl":"https://doi.org/10.1002/gj.5140","url":null,"abstract":"<div>\u0000 \u0000 <p>In the Western Sag of the Liaohe Depression within the Bohai Bay Basin, the fourth member of the Shahejie Formation (E₂s₄) in the Leijia area is characterised by lacustrine fine-grained sedimentary rocks, primarily composed of clay, felsic minerals, carbonates and analcime. These rocks serve as the key hydrocarbon reservoirs in the region. However, their complex lithology and rapid lateral variations lead to significant reservoir heterogeneity, posing challenges for the identification of favourable reservoirs. This study addresses these challenges through cyclostratigraphic analysis to enhance stratigraphic resolution and improve reservoir prediction. We employed time-series analysis, high-precision U–Pb carbonate dating and gamma ray (GR) logging data to identify astronomical cycles within the E₂s₄ fine-grained mixed rocks. Spectral analysis of GR data from wells lei93, lei37, lei53 and lei14 revealed signals consistent with standard eccentricity, obliquity and precession cycles. Using the 405 kyr long eccentricity cycle for astronomical tuning, we established a detailed chronostratigraphic framework for the E₂s₄, constrained by U–Pb dating results from several wells. In total, we identified six long eccentricity cycles (405 kyr) and approximately 19 short eccentricity cycles (~129 kyr). The correlation between Earth's orbital cycles and high-frequency sequences allowed us to construct a refined stratigraphic division and correlation framework at an eccentricity timescale. This refined framework offers a clearer understanding of reservoir distribution, greatly enhancing hydrocarbon exploration accuracy in the Leijia area. Moreover, our findings highlight the significant role of cyclostratigraphy in guiding future oil and gas exploration efforts in the Bohai Bay Basin, showcasing its potential application in broader geological contexts.</p>\u0000 </div>","PeriodicalId":12784,"journal":{"name":"Geological Journal","volume":"60 6","pages":"1515-1531"},"PeriodicalIF":1.4,"publicationDate":"2025-01-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144207011","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}

{"title":"Early Cretaceous Tuffs From the Southwestern Ordos Basin, North China Craton: Geochronology, Geochemistry and Geological Significance","authors":"Yin Chen,&nbsp;Jianguo Li,&nbsp;Lulu Chen,&nbsp;Bo Zhang,&nbsp;Hualei Zhao","doi":"10.1002/gj.5143","DOIUrl":"https://doi.org/10.1002/gj.5143","url":null,"abstract":"<div>\u0000 \u0000 <p>Tuffs are the significant medium to figure out volcanic activities, explore regional tectonic evolution and constrain the depositional ages in basins. Tuff intervals are found in the Early Cretaceous successions from the southwestern Ordos Basin, southwestern part of the North China Craton, which supplies new geochronological and geochemical evidence to understand the Early Cretaceous tectonic setting. In this work, whole-rock and zircon geochemistry, zircon U–Pb dating and Hf isotopic analyses were conducted. Zircon U–Pb dating results yielded ages of 125.32, 121.71 and 118.20 Ma, which have recorded the erupting of rhyolites and constrained the depositional age precisely to belong to the Aptian. Two groups of zircons Hf isotopic data are ε_Hf(t) of 8 with T_DM2 of 693–570 Ma and ε_Hf(t) of −11.7 with T_DM2 of 1908 Ma. Westerlies or southwesterlies were prevailing in the Early Cretaceous and can bring cinerites from the western or southwestern part of China. Comparative analysis of geochemistry and zircon Hf isotopes exhibited that the volcanoes from the Qiangtang Block and the Qingling Orogen were the most potential sources for the tuffs. These Early Cretaceous volcanic eruptions were triggered by the subduction of the Bangong-Nujiang Ocean and the Paleo-Pacific Ocean with plate roll-back and lithospheric destruction.</p>\u0000 </div>","PeriodicalId":12784,"journal":{"name":"Geological Journal","volume":"60 7","pages":"1559-1575"},"PeriodicalIF":1.4,"publicationDate":"2025-01-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144635602","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}

{"title":"Late Triassic to Jurassic Tectonic Evolution of the Northern Sichuan Foreland Basin, South China Craton","authors":"Can Xiong,&nbsp;Xiangyang Yang,&nbsp;Yunpeng Dong,&nbsp;Ming Xiao,&nbsp;Zhaoying Wei,&nbsp;Yanbo Feng,&nbsp;Jiaopeng Sun,&nbsp;Lingzi Xiang,&nbsp;Lin Yu,&nbsp;Songlin Xie,&nbsp;Cuifang Wang,&nbsp;Songlin Zhang","doi":"10.1002/gj.5131","DOIUrl":"https://doi.org/10.1002/gj.5131","url":null,"abstract":"<div>\u0000 \u0000 <p>The Northern Sichuan Foreland Basin, which is located in the northwest of South China Craton (SCC), was formed by the intracontinental thrusting between the Qinling Orogenic Belt (QOB) and SCC. The Upper Triassic to Jurassic sedimentary successions within this foreland basin, contain crucial information for revealing the intracontinental deformation sequence between the QOB and the SCC. In this study, based on a systematic dataset, including the palaeocurrent orientation, sandstone modal composition, and detrital zircons U–Pb age data, we attempt to reveal the tectonic processes during the Late Triassic to Jurassic interval. The palaeocurrent orientations, which is primarily directed in the southward and northwestward directions, indicate that the sediments were sourced from the north and southeast. The sandstone clastic components reveal multiple sources, including the magmatic arc and continental crust. Detrital zircons from six samples yield six major U–Pb age groups, including 2650–2350, 2050–1720, 1000–620, 520–380, 350–210, and 205–160 Ma. The Upper Triassic sediments contain a relatively high density of 2490, 1860, 810, 440, and 230 Ma, which are mostly consistent with the QOB, northern SCC and Jiangnan Suture Zone provenances. The majority age population of 2050–1750 Ma observed within the Xujiahe Formation, is considered to be primarily sourced from northern SCC, suggesting the uplift and erosion of the northern SCC, probably imply extreme shortening between the QOB and SCC. The Baitianba and Xintiangou formations, which contain lesser 2050–1720 Ma aged zircons, indicate a period of lacustrine expansion and tectonic quiescence after the shortening. The Middle Jurassic Shaximiao Formation, and the Upper Jurassic Suining and Penglaizhen formations, involve a major age population of 2050–1720 Ma that were sourced from northern SCC, indicate another phase of uplifting of the northern SCC related to a second stage of extreme intracontinental shortening and deformation between the SCC and the QOB. In summary, the above results indicate that, an initial phase of extensive shortening between the QOB and the SCC during the Late Triassic, was followed by a period of tectonic quiescence during the Early Jurassic, and another phase of extreme intracontinental shortening between the QOB and SCC during the Middle to Late Jurassic.</p>\u0000 </div>","PeriodicalId":12784,"journal":{"name":"Geological Journal","volume":"60 2","pages":"531-559"},"PeriodicalIF":1.4,"publicationDate":"2025-01-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143439231","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}

{"title":"Reduced Granitic Rocks and Related Gold Mineralisation: Implications From Chronology, Geochemistry and Sr–Nd–Hf–O Isotopic System of Early Cretaceous Granites From the Wulong Gold Deposit, Liaodong Peninsula, NE China","authors":"Jun Liu,&nbsp;Xiao-Tong Wang,&nbsp;Jun-Cheng He,&nbsp;Tie-Gang Li","doi":"10.1002/gj.5146","DOIUrl":"https://doi.org/10.1002/gj.5146","url":null,"abstract":"<div>\u0000 \u0000 <p>The Liaodong Peninsula is the northeastern part of the North China Craton and hosts abundant Late Mesozoic granites and associated gold deposits. The Wulong deposit contains 57.5 t Au with an average grade of 7.1 g/t and is the largest gold deposit in the Liaodong Peninsula. The Wulong gold orebodies are hosted in Mesozoic biotite granites and have a close association with synchronous granite porphyry dykes. In this study, we provide a systemic geochemical and chronological study to distinguish fertile granites from barren ones from the Wulong deposit. Our study shows that the Wulong fertile granite porphyry (high Sr/Y) and Sanguliu barren granite (low Sr/Y) have zircon U–Pb ages of 132 ± 1 and 136 ± 0.4 Ma, respectively. The fertile and barren granites share similar REE patterns by characteristic of LREE enrichment and HREE depletion. They are classified as reduced ilmenite-type granitic rocks. Petrochemistry and Sr–Nd–Hf–O isotopes show that the Wulong fertile and Sanguliu barren granites were derived from intensive crustal reworking in the North China Craton. The Wulong fertile granites were derived from mixing of lithospheric mantle–derived and thickened ancient lower crust–derived magmas. The Sanguliu barren granites were derived from partial melting of the ancient lower crust with normal crustal thickness. Geochemical features of zircon and apatite indicate that the both fertile and barren granites are similar in crystallisation temperature, water content, and oxygen fugacity. Our study suggests that magma source composition is essential to gold metallogeny, and mantle-derived components are a key indicator to distinguish fertile and barren granitoids. Exploration for gold deposits related to reduced intrusions may be promising within the Liaodong Peninsula.</p>\u0000 </div>","PeriodicalId":12784,"journal":{"name":"Geological Journal","volume":"60 7","pages":"1601-1621"},"PeriodicalIF":1.4,"publicationDate":"2025-01-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144635601","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}

{"title":"Ce-Yb Fingerprinting of Phanerozoic Volcanic Rocks and Its Applicability to Some Archean Greenstone Belt Magmas","authors":"Subarna Baidya,&nbsp;Rajagopal Anand,&nbsp;Swayoma Bose,&nbsp;Nongmaithem Lakhan Singh","doi":"10.1002/gj.5126","DOIUrl":"https://doi.org/10.1002/gj.5126","url":null,"abstract":"<div>\u0000 \u0000 <p>Rare earth element fractionation in volcanic rocks can be used to recognise both petrogenetic processes and tectonic settings. We present a simple geochemical modelling approach using Ce<span></span>Yb proxy employing the Magma Chamber Simulator tool and the binary mixing model to understand the range and the limits of variation in the enrichment of incompatible trace elements, brought about in evolved magmas by differentiation processes in known Phanerozoic tectonic settings in conjunction with the Th<span></span>Nb<span></span>Yb proxy. By extending this approach to the volcanic rocks of the Meso-Neoarchean greenstone belts it is observed that rocks, which fall beyond the limits set by binary mixing and fractional crystallisation in a bivariant trace element plot were most likely generated by the modification of the mantle source by subducting slab-derived fluids prior to the melting of the source and the diversification of the magmas into differentiated rocks. Subduction–accretion process was established at least by the Meso-Neoarchean. The greenstone belts of the Dharwar and Yilgarn cratons represent Archean analogues of oceanic crust that were predominantly emplaced in a convergent-margin tectonic setting and probably acted as suture zones that juxtaposed continental crustal masses by horizontal tectonic forces.</p>\u0000 </div>","PeriodicalId":12784,"journal":{"name":"Geological Journal","volume":"60 2","pages":"509-530"},"PeriodicalIF":1.4,"publicationDate":"2025-01-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143438736","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}