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Geochronology and Geochemistry of Ore-related Granitoids in the Giant Gariatong Rb Deposit,Tibet and Implications for Rb Metallogeny in China

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Acta Geologica Sinica(English Edition) 2024年第1期98卷 83-103页

作者： LIN Bin TANG Juxing TANG Pan SUN Yan QI Jing msantosh XIE Jinling DENG Shilin LI Faqiao XIE Fuwei ZHOU Aorigele MNR Key Laboratory of Metallogeny and Mineral Assessment Institute of Mineral ResourcesChinese Academy of Geological SciencesBeijing 100037China SinoProbe Laboratory Chinese Academy of Geological SciencesBeijing 100094China The Key Laboratory of the Ministry of Education on Solid Waste Treatment and Recycling School of Environment and ResourceSouthwest University of Science and TechnologyMianyangSichuan 621010China School of Earth Sciences and Resources China University of Geosciences(Beijing)Beijing 100083China Department of Earth Sciences University of AdelaideAdelaide SA-5005Australia Faculty of Geosciences and Environmental Engineering Southwest Jiaotong UniversityChengdu 610031China Regional Geological Survey Team of the Tibetan Bureau of Geology and Mineral Exploration and Development Lhasa 851400China College of Earth Science and Key Laboratory of Tectonic Controlled Mineralization and Oil Reservoirs Chengdu University of TechnologyChengdu 610059China

Rubidium(Rb)deposits mostly occur in the South China and Central Asia orogenic belts and are often closely associated with highly differentiated *** study investigates a newly-discovered giant Rb deposit at Gariatong in the Central Lhasa terrane in *** field studies and logging data revealed that the Rb mineralization mainly occurs in monzogranite and is related to ***-ICP-MS U-Pb dating of zircon yielded ages of 19.1±0.2 Ma and 19.0±0.2 Ma for greisenized monzogranite and fresh monzogranite,*** monzogranites are characterized as strongly peraluminous,with high contents of SiO2,Al2O3,K2O and Na2O as well as a high differentiation *** are enriched in light rare earth and large ion lithophile elements with significant negative Eu anomalies and depleted high fieldstrength *** and geochemical features of these ore-related monzogranites suggest that they are highly fractionated S-type granites,derived from remelting of crustal materials in a post-collisional *** geochemistry of zircon and apatite points to a low oxygen fugacity of the ore-related monzogranite during the magma’s *** discovery of the Gariatong Rb deposit suggests that the Central Lhasa terrane may be an important region for rare metal mineralization.

关键词： LA-ICP-MS U-Pb dating geochemistry Rb metallogeny Gariatong Tibet

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The Early-Middle Triassic Supervolcano in the Yangtze Block,South China and associated obstacles to biotic recovery

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Geoscience Frontiers 2024年第1期15卷 69-83页

作者： Haifeng Chen Hao Zou msantosh Huawen Cao Franco Pirajno Changcheng Huang Mingcai Hou State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation Chengdu University of TechnologyChengduSichuan 610059China College of Earth Science Chengdu University of TechnologyChengduSichuan 610059China School of Earth Sciences and Resources China University of GeosciencesBeijing 100083China Department of Earth Science University of AdelaideAdelaideSA 5005Australia Yonsei Frontier Lab Yonsei UniversitySeoulSouth Korea Centre of Exploration Targeting The University of Western Australia35 Stirling HighwayCrawleyWA 6009Australia

The end-Permian mass extinction was one of the major global crises spanning the entire Early Triassic or *** of volcanos were one of the factors that delayed the biotic recovery after this *** eruptions can cause catastrophic effects on global environment,climate,and *** we investigate the tuff layers from Early-Middle Triassic boundary in the Yangtze Block and identify a supervolcano eruption *** zircon U-Pb ages of the section-Langdai,section-Daijiagou and section-Longmendong tuff samples are 247.1±1.9 Ma,247.6±2.0 Ma and 247.7±1.7 Ma,*** ages mark the Olenekian-Anisian *** zircon grains from the tuff layers have negativeεHf(t)(-15.3 to-0.8),two-stage Hf model(TDM2)ages(1.7 to 2.2 Ga)and display high-δ18O values(mostly>10‰).Clay minerals and quartz dominate the rock *** whole rock compositions show that the tuff layers were derived from magma of intermediate to felsic composition,which formed by the remelting of Paleoproterozoic materials of continental *** volcanic eruption site is located in the Jinshajiang-Ailaoshan-Song Ma suture zone in the southwestern margin of the Yangtze Block.A combination of the closure of the Paleo-Tethys Ocean Basin and the collision of the Indochina Block and South China contributed to the eruption,which was a supervolcano eruption under the active continental margin arc *** speculate that this supervolcano eruption might have contributed to the delayed biotic recovery after the end-Permian mass extinction.

关键词： Early-Middle Triassic Tuff layer Supervolcano Yangtze Block Biotic recovery

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Contrasting sources and enrichment mechanisms in lithium-rich salt lakes:A Li-H-O isotopic and geochemical study from northern Tibetan Plateau

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Geoscience Frontiers 2024年第2期15卷 315-333页

作者： Fei Xue Hongbing Tan Xiying Zhang msantosh Peixin Cong Lu Ge Chao Li Guohui Chen Yu Zhang School of Earth Sciences and Engineering Hohai UniversityNanjing 210098PR China Key Laboratory of Comprehensive and Highly Efficient Utilization of Salt Lake Resources Qinghai Provincial Key Laboratory of Geology and Environment of Salt LakesQinghai Institute of Salt LakesChinese Academy of SciencesQinghai 810008PR China School of Earth Sciences and Resources China University of Geosciences BeijingBeijing 100083PR China Department of Earth Sciences University of AdelaideSA 5005Australia Yonsei Frontier Lab Yonsei UniversitySeoul 0372Korea

Lithium(Li),a crucial mineral resource for modern high-tech industries,is notably abundant in the northern Tibetan Plateau,primarily within lithium-rich salt ***,the exploration and development of these resources are hindered due to an incomplete understanding of their nature and *** we present results from a comprehensive study on the hydrochemical parameters,whole-rock geochemistry,H-O isotopes,and Li concentrations in surface brine,river water,geothermal springs,and associated rocks from two representative lithium-enriched salt lakes,the Laguo Co(LGC)and Cangmu Co(CMC)in Tibet to understand the genetic *** water-salt balance calculations and H-O isotopic analysis reveal that Li in LGC and CMC primarily originates from the Suomei Zangbo(SMZB,~91%)and Donglong Zangbo(DLZB,~75%)rivers,*** is estimated that the LGC and CMC took a minimum of 6.0 ka and 3.0 ka to accumulate their current lithium resources,*** distinct geological characteristics reflect evolutionary differences between the two lakes,suggesting diverse lithium sources and enrichment *** high lithium ion concentration and light lithium isotope composition in the SMZB river waters indicate the genetic relationship with lithium-enriched geothermal springs in the Tibetan *** results suggest that lithium in the LGC originates from lithium-enriched geothermal springs and is primarily supplied through the small-scale SMZB *** contrast,the formation and evolution of CMC are influenced by the northern Lunggar rifts,receiving a prolonged and stable input from the DLZB,resulting in high lithium concentrations and isotopic *** absence of lithium-enriched geothermal springs and the prevalence of silicate rocks in the CMC catchment suggest that lithium may be sourced from the weathering of silicate rocks,such as granitic pegmatite veins containing lithium-rich beryl,widely distributed in the upstream area of *** forward modeling a

关键词： Lithium isotopes Hydrochemistry Salt lakes Enrichment mechanism Tibetan Plateau

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Multi-stage metallogeny in the southwestern part of South China,and paleotectonic and climatic implications:A high precision geochronologic study

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Geoscience Frontiers 2023年第3期14卷 131-147页

作者： Yanbin Liu Lifei Zhang msantosh Guochen Dong Hongying Zhou Chaoyang Que Cheng-Xue Yang State Key Laboratory of Geological Processes and Mineral Resources and School of Earth Science and ResourcesChina University of GeosciencesBeijing 100083China MOE Key Laboratory of Orogenic Belts and Crustal Evolution School of Earth and Space SciencesPeking UniversityBeijing 100871China Department of Earth Science University of AdelaideAdelaide SA 5005Australia Tianjin Institute of Geology and Mineral Resources China Geological SurveyTianjin 300170China Zijin Mining Industry Groups Co. Ltd.Xiamen 361009FujianChina

The South China Block(SCB)is among the large-scale W-Sn mineralized regions of the *** Laojunshan W-Sn-dominant ore area(LOA)in the western part of the SCB preserves the records of the tectonic history of the Tethys realm extending through North Vietnam,and Yangtze to Cathaysia blocks,with coeval formation of giant metallic *** prolonged tectonic activities and their control on the genesis and spatio-temporal distribution of giant metallic deposits in the LOA provide a window for a holistic understanding of the tectono-metallogenesis of the *** this study,we present results from a multi-chronologic study to determine the timing of formation of the cassiterite-wolframite-schee lite *** results suggest three distinct tectono-metallogenic periods in the LOA during the geodynamic evolution of the surrounding tectonic *** opening of the Proto-Tethys Ocean between the Yangtze-Indochina blocks and the westward Paleo-Pacific subduction beneath the Cathaysia block(420–380 Ma)jointly contributed to the Silurian to early Devonian intracontinental orogeny in the middle of the SCB that involved top-to-the-north thrusting along NE-striking shear *** event generated the Dulong-Song Chay granitoids,together with the formation of Xinzhai Sn deposit related to sheared mylonitic granites(ca.419 Ma)and pegmatites(ca.389 Ma),which include the early-stage Sn-sulfide skarn(ca.418 Ma)and the late-stage Sn-bearing schist(ca.389 Ma).During the Late Permian to Late Triassic(260–220 Ma),with the closure of the Proto-Tethys oceans in the west and ongoing Paleo-Pacific westward subduction in the east,the SCB and Indochina Block(IB)were amalgamated which also marks the time of formation of the Nanwenhe scheelite skarn *** subducted PaleoTethys oceanic crust was likely entrained by the nearby rising Emeishan mantle plume(270–259 Ma),which formed the Maguan diabase(ca.260 Ma)that shows significantly older Re-Os model age of ca.268 Ma,suggesting

关键词： Sn-W mineralization Geochronology Tectonics setting South China Block Tethys realm

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Detrital Zircon Records of the Banxi Group in the Western Jiangnan Orogen:Implications for Crustal Evolution of the South China Craton

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Acta Geologica Sinica(English Edition) 2023年第1期97卷 35-54页

作者： ZHOU Weijian HUANG Dezhi YU Zhiqiang msantosh CAO Yusen ZHANG Jiandong LIU Lei CUI Jianjun LI Jianyuan Key Laboratory for Metallogenic Prediction of Nonferrous Metals and Geological Environment Monitoring Ministry of EducationSchool of Geosciences and Info-PhysicsCentral South UniversityChangsha 410083China School of Earth Science and Resources China’s University of GeosciencesBeijing 100083China Department of Earth Sciences University of AdelaideAdelaide SA 5005Australia Key Laboratory of Mineralogy and Metallogeny Guangzhou Institute of GeochemistryChinese Academy of SciencesGuangzhou 510640China Institute of Geomechanics Chinese Academy of Geological SciencesBeijing 100081China Laboratory of Paleomagnetism and Tectonic Reconstruction of Ministry of Natural Resources Institute of GeomechanicsChinese Academy of Geological SciencesBeijing 100081China Liaoning Metallurgical Geological Exploration Research Institute Co.Ltd. AnshanLiaoning 114000China

The Neoproterozoic evolution of the Jiangnan Orogen is important for understanding the tectonic history of South *** a volcanic-sedimentary sequence developed in the Nanhua rift,the Banxi Group preserves the records of important magmatic and tectonic events linked to the assembly and breakup of the Rodinia *** this study,we report the results from whole-rock major-and trace-element concentrations,with zircon LA-(MC)-ICP-MS U-Pb ages,trace elements and Lu-Hf isotopic compositions of sandstones from the Banxi *** rocks are characterized by high SiO_(2)(65.88%–82.76%,with an average of 75.50%)contents,moderate(Fe_(2)O_(3)^(T)+MgO)(1.81%–7.78%,mean:3.79%)and TiO_(2)(0.39%–0.54%,mean:0.48%),low K_(2)O/Na_(2)O(0.03–0.40,mean:0.10)ratios and low Al_2O_(3)/SiO_(2)(0.11–0.24,mean:0.15)*** sandstones have highΣREE contents(mean:179.1 ppm),with chondrite-normalized REE patterns similar to the upper crust and PAAS,showing enriched LREE((La/Yb)_N mean:14.85),sub-horizontal HREE curves and mild Eu(Eu/Eu^(*):0.75–0.89,mean:0.81)negative *** geochemical characteristics resemble those of passive continental margin *** of the zircons are magmatic in origin and yield a U-Pb age distribution with three peaks:a major age peak at 805 Ma and two subordinate age peaks at 1990 Ma and 2470 Ma,implying three major magmatic *** Neoproterozoic zircons haveε_(Hf)(t)values ranging from-47.4 to 12.4(mostly-20 to 0),suggesting a mixture of some juvenile arc-derived material and middle Paleoproterozoic heterogeneous crustal *** Hf model ages of middle Paleoproterozoic zircons(~1990 Ma)with negativeε_(Hf)(t)values(-12.65 to-6.21,Ave.=-9.8)concentrated around the Meso-Paleoarchean(mean T_(DM)^(C)=3.3–3.1 Ga).For late Neoarchean detrital zircons(~2470 Ma),ε_(Hf)(t)values are divided into two groups,one with negative values(-9.16 to-0.6)with model ages of 3.5–2.9 Ga,the other featuring positive values(1.0 to 3.9)with model ages of 2

关键词： detrital zircon U-Pb age Lu-Hf isotope episodic magmatism Jiangnan Orogen

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“印度-欧亚大陆碰撞及其远程效应”专栏寄语(附“纲领性工作图件”)

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地学前缘 2021年第5期28卷 226-229页

作者：董树文高锐 msantosh VSANKOV 赵俊猛不详

伴随着五月的鸟语花香,“印度欧亚大陆碰撞及其远程效应”栏目即将与大家见面。板块构造理论完美地解释了大洋岩石圈的形成和演化,是地球科学的一场革命。但占地球表面积35%的大陆,其岩石圈的构造和变形并没有在板块构造理论中涉及,这... 详细信息

伴随着五月的鸟语花香,“印度欧亚大陆碰撞及其远程效应”栏目即将与大家见面。板块构造理论完美地解释了大洋岩石圈的形成和演化,是地球科学的一场革命。但占地球表面积35%的大陆,其岩石圈的构造和变形并没有在板块构造理论中涉及,这是具有重大科学意义的基础科学问题,而青藏高原被认为是发展板块构造理论的最佳场所。

关键词：板块构造理论地球科学欧亚大陆基础科学问题岩石圈最佳场所

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塔里木过渡型大火成岩省粗面英安岩中水硅铁石的识别及意义

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地球科学 2020年第11期45卷 4026-4026页

作者：郎明德程志国张招崇汪方跃毛骞 msantosh 不详

塔里木大火成岩省以发育高比例长英质岩石为特征,因而被界定为介于镁铁质大火成岩省和硅质大火成岩省之间的过渡型大火成岩省,但目前对于塔里木大火成岩省为何能够产生如此巨量的长英质岩石依然认识不清.文章以塔里木大火成岩省粗面英... 详细信息

塔里木大火成岩省以发育高比例长英质岩石为特征,因而被界定为介于镁铁质大火成岩省和硅质大火成岩省之间的过渡型大火成岩省,但目前对于塔里木大火成岩省为何能够产生如此巨量的长英质岩石依然认识不清.文章以塔里木大火成岩省粗面英安岩中的水硅铁石为研究对象,对其开展系统的电子探针剖面和LA-ICP-MS矿物微量元素研究,认为水硅铁石是岩浆快速上升过程中由角闪石裂解而成.

关键词：塔里木大火成岩省英安岩长英质岩石镁铁质大火成岩省过渡型电子探针快速上升矿物微量元素

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