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Acta Geologica Sinica(English Edition) 2018年第5期92卷 2030-2031页

作者： QIN Ya FENG Zuohai hu rongguo LI Saisai WANG Chunzeng Collaborative Innovation Center for Exploration of Hidden Nonferrous Metal Deposits and Development of New Materials in Guangxi & Guangxi Key Laboratory of Hidden Metallic Ore Exploration Guilin University of Technology Guilin 541004 China University of Maine at Presque Isle Presque lsle Maine 04769 USA

Objective The northern Guangxi region is in the southwestern part of the Southern China continent,which is located at the junction of the southwest section of the Early Paleozoic Yangtze block and Cathaysian block.A series of NNE-trending ductile shear zones are developed in this region,and these ductile shear zones are mostly previously suggested boundary faults of the Early Paleozoic Yangtze block and Cathaysian block,such as the Shoucheng–Piaoli ductile shear zone in Northern Guangxi （Meng Yuanku et al., 2016; Zhang Xuefeng et al., 2015）.

关键词： Pb Th Northern Guangxi Timing of the Early Paleozoic Yangtze and Cathysian Convergence Constraint from U-Pb Geochronology of Hydrothermal Zircons from Mafic Mylonite within the Shoucheng-Piaoli Ductile Shear Zone

Retrograde metamorphism of the eclogite in North Qaidam,western China:Constraints by joint ^(40)Ar/^(39)Ar in vacuo crushing and stepped heating

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Geoscience Frontiers 2015年第5期6卷 759-770页

作者： rongguo hu Jan Wijbrans Fraukje Brouwer Linghao Zhao Min Wang huaning Qiu State Key Laboratory of Isotope Geochemistry Guangzhou Institute of GeochemistryChinese Academy of Sciences Department of Earth Sciences VU University Amsterdam University of Chinese Academy of Sciences

Two amphiboles and a syn-metamorphic quartz vein from the Yuka terrane,North Qaidam,western China,have been analyzed by joint40Ar/39Ar crushing in vacuo and stepwise heating *** crushing in vacuo results provide information to directly constrain the timing of fluid activity and the age of amphibolite-facies *** stepwise heating results could further be used to decipher the thermal history of the UHP *** from amphibolites and quartz vein within garnetamphibolite lens analyzed by in vacuo crushing yield similarly shaped age spectra and exhibit relatively flat age plateaus for the last several *** characteristics of gas release patterns and geochronological data testify to the presence of significant excess40Ar within the fluid *** age plateaux with weighted mean ages（WMA） ranges from 488 to 476 Ma for amphiboles and 403 Ma for quartz（2σ）.These data points constitute amphibole WMA yielding excellent isochrons with isochron ages of 469 and 463 Ma with initial40Ar/36Ar ratios of 520 and 334,*** isochron ages are interpreted to represent initial amphibolite-facies *** data points constituting the quartz age plateaux give an isochron age of 405 Ma with initial40Ar/36Ar ratio of 295,recording a significant aqueous fluid flow episode during the early *** spectra obtained by stepwise heating of amphibole residues remaining after crushing experiments are characterized by younger and relatively complex age spectra,which are probably influenced by the combined effects of resetting argon and/or mineral ***,we note that the spectra shapes have features in common:excluding the last two steps,minimum apparent ages are found at temperatures of around 500 ℃,corresponding to319 and 249 Ma,perhaps representing the time of isotopic resetting or resulting from release gas from mineral inclusions of,e.g.,biotite or *** apparent ages are obtained at temperatures of aro

关键词： 40Ar/39Ar techniques In vacuo crushing Amphibolite

Geochronology, geochemistry, and Sr-Nd isotopes of Early Carboniferous magmatism in southern West Junggar, northwestern China: Implications for Junggar oceanic plate subduction

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Journal of Arid Land 2021年第11期13卷 1163-1182页

作者： LIU Pengde LIU Xijun XIAO Wenjiao ZHANG Zhiguo SONG Yujia XIAO Yao LIU Lei hu rongguo WANG Baohua Guangxi Key Laboratory of Hidden Metallic Ore Deposits Exploration College of Earth SciencesGuilin University of TechnologyGuilin 541004China Xinjiang Research Center for Mineral Resources Xinjiang Institute of Ecology and GeographyChinese Academy of SciencesUrumqi 830011China Collaborative Innovation Center for Exploration of Nonferrous Metal Deposits and Efficient Utilization of Resource Guilin University of TechnologyGuilin 541004China

West Junggar is a key area for understanding intra-oceanic plate subduction and the final closure of the Junggar *** of the Carboniferous tectonic evolution of the Junggar Ocean region is required for understanding the tectonic framework and accretionary processes in West Junggar,Central Asian Orogenic Belt.A series of Early Carboniferous volcanic and intrusive rocks,namely,basaltic andesite,andesite,dacite,and diorite,occur in the Mayile area of southern West Junggar,northwestern *** new LA-ICPMS zircon U-Pb geochronological data reveal that diorite intruded at 334(±1)Ma,and that basaltic andesite was erupted at 334(±4)*** intrusive and volcanic rocks are calc-alkaline,display moderate MgO(1.62%-4.18%)contents and Mg#values(40-59),and low Cr(14.5×10-6-47.2×10-6)and Ni(7.5×10-6-34.6×10-6)contents,and are characterized by enrichment in light rare-earth elements and large-ion lithophile elements and depletion in heavy rare-earth elements and high-field-strength elements,meaning that they belong to typical subduction-zone island-arc *** samples show low initial 87Sr/86Sr ratios(range of 0.703649-0.705008),positiveεNd(t)values(range of 4.8-6.2 and mean of 5.4),and young TDM Nd model ages ranging from 1016 to 616 Ma,indicating a magmatic origin from depleted mantle involving partial melting of 10%-25%garnet and spinel *** our results with those of previous studies,we suggest that these rocks were formed as a result of northwestward subduction of the Junggar oceanic plate,which caused partial melting of sub-arc *** conclude that intra-oceanic arc magmatism was extensive in West Junggar during the Early Carboniferous.

关键词： Early Carboniferous magmatism geochronology geochemistry Junggar Oceanic plate subdution West Junggar Central Asian Orogenic Belt

Neoproterozoic I-type granites in the Central Tianshan Block (NW China):geochronology,geochemistry,and tectonic implications

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Journal of Arid Land 2022年第1期14卷 82-101页

作者： SONG Yujia LIU Xijun XIAO Wenjiao ZHANG Zhiguo LIU Pengde XIAO Yao LI Rui WANG Baohua LIU Lei hu rongguo Guangxi Key Laboratory of Hidden Metallic Ore Deposits Exploration College of Earth SciencesGuilin University of TechnologyGuilin 541004China Xinjiang Research Center for Mineral Resources Xinjiang Institute of Ecology and GeographyChinese Academy of SciencesUrumqi 830011China Collaborative Innovation Center for Exploration of Nonferrous Metal Deposits and Efficient Utilization of Resource Guilin University of TechnologyGuilin 541004China

The Central Tianshan Block is one of numerous microcontinental blocks within the Central Asian Orogenic Belt(CAOB)that overlies Precambrian basement *** the evolution of these ancient basement rocks is central to understanding the accretionary and collisional tectonics of the CAOB,and their place within the Rodinia ***,to date,the timing and tectonic settings in which the basement rocks in the Central Tianshan Block formed are poorly constrained,with only sparse geochemical and geochronological data from granitic rocks within the northern segment of the ***,we present a systematic study combining U-Pb geochronology,whole-rock geochemistry,and the Sr-Nd isotopic compositions of newly-identified granitic gneisses from the Bingdaban area of Central Tianshan *** analyzed samples yield a weighted mean Neoproterozoic 206Pb/238U ages of 975-911 *** weakly-peraluminous granitic rocks show a common geochemical I-type granite *** granitic gneisses are calc-alkaline and enriched in large ion lithophile elements(LILEs)and light rare earth elements(LREEs),but they are depleted in high field strength elements(HFSEs);these characteristics are similar to those of typical subduction-related *** samples show initial(^(87)Sr/^(86)Sr)(t)ratios between 0.705136 and *** forεNd(t)in the granitic gneisses are in the range from-5.7 to-1.2,which correspond to Nd model ages of 2.0-1.7 Ga,indicating a role for Mesoproterozoic to Paleoproterozoic rocks in the generation of the granitic *** documented geochemical features indicate that the protoliths for the gneisses have a similar petrogenesis and magmatic source,which may reflect partial melting of thickened crust with the addition of small amounts of mantle-derived *** Central Tianshan Block probably constitute part of an exterior orogen that developed along the margin of the Rodinian supercontinent during the Early Neoproterozoic and underw

关键词： Neoproterozoic I-type granites geochronology Central Tianshan Block Rodinian supercontinent Central Asian Orogenic Belt(CAOB)

WARM STORIES IN LHODRAK

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China's Tibet 2022年第1期33卷 23-26页

作者： Drapa Wangchen hu rongguo Duan Min Yang Xiaojuan Zhu Nan huang Wenjuan(Translated) 不详

Benpa Township of Lhodrak County in Lhoka City,the Tibet Autonomous Region,is famous for possessing thousands of ancient *** we came across Saldron and Zhou Jinsheng,the two were wandering hand in hand between these l... 详细信息

关键词： spite tower everything

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口语交际“灵动”课堂构建初探

语文教学通讯 2022年第36期1218卷 72-74页

作者：胡蓉国重庆市合川区双凤镇中心小学重庆401520

口语交际是听说互动的过程,而如何鼓励学生表达却成为一个问题。教师可以通过创设交际情境激发学生的激情,采用多种形式促进学生的交际,拓展延伸口语交际渠道,有效提升学生的口语交际能力。

关键词：口语交际情境创设构建探讨

湘东南锡田钨锡多金属矿床锡石^40Ar/^39Ar直接定年

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大地构造与成矿学 2015年第6期39卷 1049-1060页

作者：王敏白秀娟胡荣国程顺波蒲志平邱华宁中国科学院广州地球化学研究所同位素地球化学国家重点实验室广东广州510640 中国地质大学(武汉)资源学院构造与油气资源教育部重点实验湖北武汉430074 中国地质调查局武汉地质调查中心湖北武汉430205

锡田矿床是近年来新发现的一个大型钨锡多金属矿床。为了探讨锡石直接定年的可能性,拓宽流体包裹体^(40)Ar/^(39)Ar定年对象,本文对锡田钨锡矿床一块矿石的共生白云母和锡石进行了^(40)Ar/^(39)Ar定年对比研究。白云母采用激光阶段加热... 详细信息

锡田矿床是近年来新发现的一个大型钨锡多金属矿床。为了探讨锡石直接定年的可能性,拓宽流体包裹体^(40)Ar/^(39)Ar定年对象,本文对锡田钨锡矿床一块矿石的共生白云母和锡石进行了^(40)Ar/^(39)Ar定年对比研究。白云母采用激光阶段加热分析,锡石采用真空击碎法提取流体包裹体进行定年,两者获得了非常一致的^(40)Ar/^(39)Ar年龄。白云母形成平坦的年龄谱,坪年龄为155.6±1.7 Ma(2σ)。锡石真空击碎分析形成了下降型阶梯状年龄谱,最初7个阶段表观年龄明显偏老且迅速下降,表明锡石中次生包裹体含有过剩氩;第8~18阶段形成了年龄坪,对应的^(39)Ar释放量占83.8%,坪年龄为154.3±3.0 Ma。锡石年龄坪数据点构成高度线性相关的等时线,等时年龄为155.1±7.0 Ma,代表了原生包裹体的年龄。锡石原生包裹体年龄与共生白云母年龄一致,代表了锡田矿床的成矿年龄,成矿作用发生在~155 Ma,属华南晚侏罗世大规模钨锡多金属成矿高峰期。在K-Cl-40Ar相关图解上,次生、原生包裹体数据点截然分开,表明次生、原生包裹体的流体性质完全不同,且根据这些图解可以获得锡石次生包裹体年龄约为104 Ma。

关键词：锡石流体包裹体 ^40Ar/^39Ar法湖南锡田

柴北缘锡铁山花岗质片麻岩深熔作用年代和冷却历史:来自浅色体^(40)Ar/^(39)Ar年代学证据

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大地构造与成矿学 2016年第1期40卷 125-135页

作者：胡荣国邱华宁 Jan R.WIJBRANS Fraukje M.BROUWER 何立言王敏桂林理工大学广西隐伏金属矿产勘查重点实验室广西桂林541004 中国科学院广州地球化学研究所同位素地球化学国家重点实验室广东广州510640 Department of Petrology VU University Amsterdam

长英质浅色体广泛出露于柴北缘造山带中段锡铁山地体花岗质片麻岩中,多呈脉状、不规则透镜状顺区域片麻理走向产出,主要由钾长石、斜长石、角闪石、石英以及少量黑云母组成,是黑云母花岗质片麻岩深融作用的产物。温压估算获得其形成条件... 详细信息

长英质浅色体广泛出露于柴北缘造山带中段锡铁山地体花岗质片麻岩中,多呈脉状、不规则透镜状顺区域片麻理走向产出,主要由钾长石、斜长石、角闪石、石英以及少量黑云母组成,是黑云母花岗质片麻岩深融作用的产物。温压估算获得其形成条件为P=(6.5~9.6)′102 MPa,T=640~690℃,达麻粒岩相。选取浅色体角闪石和钾长石单矿物进行激光阶段加热^(40)Ar/^(39)Ar定年。角闪石共进行了17个阶段,其中3~17阶段数据形成平坦年龄谱,坪年龄为442.5±4.0 Ma;构成年龄坪的数据对应的等时线年龄为441.6±3.9 Ma,相应初始捕获氩比值为303±4,暗示该角闪石样品不含过剩^(40)Ar。坪年龄~442.5 Ma解释为角闪石初始结晶年龄,代表了锡铁山地区黑云母片麻岩发生深融(混合岩化)的时代。共生钾长石阶段加热获得一个低温和一个高温坪,坪年龄分别为307.5±2.9 Ma和323.3±3.0 Ma;等时线图谱暗示该钾长石样品未受过剩^(40)Ar干扰。坪年龄分别代表浅色体冷却到钾长石封闭温度~200℃和~250℃的时间。^(40)Ar/^(39)Ar定年结果显示锡铁山黑云母片麻岩深熔作用后经历了低速抬升(0.1~0.2 km/Ma)和缓慢冷却(3~3.6℃/Ma)的演化历史。

关键词：浅色体花岗质片麻岩深熔作用 40Ar/39Ar定年冷却历史锡铁山地体

扬子地块西缘中元古代A型花岗岩的形成时代、地球化学特征及其大地构造意义

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大地构造与成矿学 2021年第5期45卷 1007-1022页

作者：赵锴蔡永丰冯佐海徐天德周云刘风雷胡荣国刘昊茹桂林理工大学广西隐伏金属矿产勘查重点实验室广西桂林541004 桂林理工大学广西有色金属隐伏矿床勘查及材料开发协同创新中心广西桂林541004 四川省地质矿产勘查开发局区域地质调查队四川成都610213

为阐明扬子地块西缘中元古代大地构造演化特征,本文对扬子地块西缘苴林地区花岗岩展开了系统的LA-ICP-MS锆石U-Pb年代学、全岩地球化学和Sr-Nd同位素研究。两个代表性花岗岩样品LA-ICP-MS锆石U-Pb年代学分析分别给出了1063±9 Ma和1064... 详细信息

为阐明扬子地块西缘中元古代大地构造演化特征,本文对扬子地块西缘苴林地区花岗岩展开了系统的LA-ICP-MS锆石U-Pb年代学、全岩地球化学和Sr-Nd同位素研究。两个代表性花岗岩样品LA-ICP-MS锆石U-Pb年代学分析分别给出了1063±9 Ma和1064±6 Ma的年龄。全岩地球化学分析结果显示,苴林地区花岗岩具有高硅钾、贫镁钙、低磷钛特征,其A/CNK平均值为1.37,属于高钾钙碱性过铝质岩石;稀土元素配分曲线表现为右倾“海鸥”型,具负Eu异常,富集高场强元素Zr、Th、Hf和大离子亲石元素Rb、K,亏损Ba、Sr、P、Ti等元素;样品具有相对富集的Nd同位素组成,其εNd(t)值为−9.90~−4.53。综合研究表明,苴林地区花岗岩形成于中元古代晚期,表现出A型花岗岩的地球化学特征。结合前人研究认为,苴林地区花岗岩是古老地壳物质重熔的产物,形成于后碰撞或后造山的拉张环境,其形成与Rodinia超大陆的聚合密切相关。

关键词：锆石U-Pb定年中元古代 A型花岗岩 Rodinia超大陆苴林群扬子地块

广西大厂花岗斑岩黑云母成分特征及其成岩成矿意义

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地球科学 2020年第4期45卷 1213-1226页

作者：胡荣国赵义来蔡永丰冯佐海刘希军周志辉沙培哲桂林理工大学地球科学学院广西隐伏金属矿产勘查重点实验室广西桂林541004 柳州华锡集团有限责任公司广西柳州545006

广西大厂锡多金属矿床是世界上最大的锡多金属矿床之一,区内花岗斑岩主要分布于铜坑-长坡-巴里-龙头山矿区的东侧,受近SN向张扭性断裂构造控制,并对早期形成的矿体产生了叠加改造作用.为了探讨花岗斑岩的成岩成矿条件,对花岗斑岩中以斑... 详细信息

广西大厂锡多金属矿床是世界上最大的锡多金属矿床之一,区内花岗斑岩主要分布于铜坑-长坡-巴里-龙头山矿区的东侧,受近SN向张扭性断裂构造控制,并对早期形成的矿体产生了叠加改造作用.为了探讨花岗斑岩的成岩成矿条件,对花岗斑岩中以斑晶、包体以及基质形式产出的黑云母进行了详细的电子探针分析.结果显示:花岗斑岩中的黑云母主要为岩浆成因的铁质黑云母,且指示岩体具有高碱度的特征.与斑晶和包体黑云母相比,基质黑云母相对富铁、锰、锂,贫镁、钛.斑晶和包体黑云母结晶温度为688~715℃,结晶压力为1.7~2.3 kbar,相当于6.3~8.4 km的侵位深度;基质黑云母的结晶温度为630~673℃,结晶压力为1.6~2.0 kbar,相当于6.0~7.4 km的侵位深度.斑晶、包体和基质黑云母的氧逸度分别为-17.0^-16.1、-17.0^-16.6和-19.0^-17.4,指示在侵位的过程中,伴随着岩浆的上涌,氧逸度随之降低,成岩条件由相对氧化向相对还原的方向变化.与花岗斑岩有关的共存流体性质研究显示,斑晶黑云母中的lg(fH2O/fHF)Fluid、lg(fH2O/fHCl)Fluid和lg(fHF/fHCl)Fluid值分别为3.41~3.82、3.78~4.07和-0.54^-0.17;包体黑云母中的lg(fH2O/fHF)Fluid、lg(fH2O/fHCl)Fluid和lg(fHF/fHCl)Fluid值分别为3.90~4.11、3.86~4.11和-0.74^-0.43;基质黑云母中的lg(fH2O/fHF)Fluid、lg(fH2O/fHCl)Fluid和lg(fHF/fHCl)Fluid值分别为3.90~4.39、3.85~4.96和-0.61~0.25.结果显示,在花岗斑岩上侵的过程中,与不同阶段结晶生成的斑晶、包体和基质黑云母共存的流体在成分上有一定的差异性,不是单一的流体.大厂花岗斑岩中黑云母成分的变化指示岩浆结晶过程早期阶段具有高温、高碱度和低氧逸度的特征,有利Sn元素的活化、迁移、富集,进而对大厂锡多金属矿床起到叠加改造作用.

关键词：大厂花岗斑岩黑云母氧逸度锡多金属矿床矿床