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Journal of Earth Science 2024年第1期35卷 301-305页

作者： Zhaoliang Hou kunfeng qiu Tong Zhou Yiwei Cai Frontiers Science Center for Deep-time Digital Earth China University of GeosciencesBeijing 100083China Department of Geology University of ViennaVienna 1090Austria State Key Laboratory of Geological Processes and Mineral Resources School of Earth Sciences and ResourcesChinaUniversity of GeosciencesBeijing 100083China

Backscatter electron analysis from scanning electron microscopes(BSE-SEM)produces high-resolution image data of both rock samples and thin-sections,showing detailed structural and geochemical(mineralogical)*** allows an in-depth exploration of the rock microstructures and the coupled chemical characteristics in the BSE-SEM image to be made using image processing *** image processing is a powerful tool for revealing the more subtle data“hidden”in a picture,it is not a commonly employed method in geoscientific microstructural ***,we briefly introduce the general principles of image processing,and further discuss its application in studying rock microstructures using BSE-SEM image data.

关键词： Image processing rock microstructures electron-based imaging data mining

Extensional Setting of Hainan Island in Mesoproterozoic:Evidence from Granitic Intrusions in the Baoban Group

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Acta Geologica Sinica(English Edition) 2022年第4期96卷 1199-1212页

作者： LIU Yuheng MAO Jingwen qiu kunfeng HU Jun WANG Lei XU Deming MNR Key Laboratory of Geochemical Exploration Institute of Geophysical and Geochemical ExplorationChinese Academy of Geological SciencesLangfangHebei 065000China UNESCO International Centre on Global-scale Geochemistry LangfangHebei 065000China MNR Key Laboratory of Metallogeny and Mineral Assessment Institute of Mineral ResourcesChinese Academy of Geological SciencesBeijing 100037China China University of Geosciences(Beijing) Beijing 100083China State Key Laboratory of Geological Processes and Mineral Resources School of Earth Sciences and ResourcesChina University of Geosciences(Beijing)Beijing 100083China Frontiers Science Center for Deep Ocean Multispheres and Earth System Key Lab of Submarine Geosciences and Prospecting TechniquesMOE and College of Marine GeosciencesOcean University of ChinaQingdaoShandong 266100China Laboratory for Marine Mineral Resources Qingdao National Laboratory for Marine Science and TechnologyQingdaoShandong 266237China Wuhan Center of China Geological Survey(Central South China Innovation Center for Geosciences) Wuhan 430205China

The Mesoproterozoic Baoban Group is the oldest basement in Hainan Island and has played an important role in Columbia(Nuna)supercontinent *** Mesoproterozoic granitic intrusions in the Baoban Group are the most widely-exposed Precambrian magmatic rocks and are the key to understanding the tectonic settings of Hainan Island and its relationship with the South China Block and the Columbia *** LA-ICP-MS zircon U-Pb dating on three mylonitic granite samples from the Tuwaishan and Baoban areas yield ages ranging from 1447 Ma to 1437 Ma,representing the absolute timing of the emplacement of the granitic *** with previously published geochronological data for rocks from the Baoban Group and regional mafic intrusions,it is concluded that the Baoban Group formed at 1460-1430 Ma,coeval with the emplacement of the granitic and mafic *** in-situ zircon LuHf isotope analyses for the three mylonitic granite samples yielded positiveε(t)values,ranging from+0.49 to+8.27,with model ages(T~C)ranging from 2181 Ma to 1687 Ma,suggesting that the granitic intrusions originated from a mixed source of Paleoproterozoic crust with juvenile *** zircon trace element data show characteristics of high Th/U values of 0.24-1.50,steep slopes from LREE to HREE and negative Pr,Eu anomalies with positive Ce,Sm anomalies,representing typical magmatic zircons formed in continental *** with available magmatic and detrital zircon ages from Precambrian rocks in the Cathaysia Block,Yangtze Block and western Laurentia,it is inferred that Hainan Island was separated from both the Cathaysia Block and the Yangtze Block,instead being connected with western Laurentia in the Columbia *** the decreasing tendency of basin deposition time along the western margin of Laurentia,it is proposed that Hainan Island was located to the north or northwest of the Belt-Purcell Supergroup,along the western margin of Laurentia,during

关键词： zircon U-Pb dating Lu-Hf isotopes granitic intrusions Baoban Group extensional setting Hainan Island

Metallogenetic model of Jiaodong-type gold deposits,eastern China

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Science China Earth Sciences 2023年第10期66卷 2287-2310页

作者： Jun DENG Qingfei WANG Liang ZHANG Shengchao XUE Xuefei LIU Lin YANG Liqiang YANG kunfeng qiu Yayun LIANG State Key Laboratory of Geological Process and Mineral Resources China University of GeosciencesBeijing100083China Frontiers Science Center for Deep-time Digital Earth China University of GeosciencesBeijing100083China School of Civil and Resource Engineering University of Science and Technology BeijingBeijing100083China

The genesis of giant gold provinces is an international scientific frontier,in which the source of a huge amount of gold and the drive for mineralization are key *** mineralization intensity of the Jiaodong gold province in eastern China is a rare occasion in the world,because it owns gold reserves of~5500 tons within an area of less than 10,000 km^(2).The Jiaodong gold province formed in the superimposed domain of diverse tectonic regimes in an intracontinental *** regional peak metamorphism and Triassic continental collision are followed by the tectonic transition and gold mineralization at ca.120 Ma with time intervals of 1.9 billion years and about 100 million years,*** Jiaodong gold deposits are different from orogenic and intrusion-related gold deposits in terms of the tectonic background,types of host rocks,and oreforming *** gold deposits show close spatial-temporal and genetic relationships to mafic igneous rocks,implying the derivation of ore-forming fluids from the metasomatic mantle *** dykes in Jiaodong have negativeε_(Hf)(t)values of-29.9 to-9.1,Os content of 0.002-0.16 ppb,heavyδ^(18)O up to 8.23‰,and high initial^(187)Os/^(188)Os ratios of *** indicate that the lithospheric mantle was metasomatized by ancient crust-derived *** lithospheric mantle in the western Jiaodong shows generally more enriched isotope features than that in the eastern part,which is explained to be an important reason for its huge gold *** mafic dykes show lighter Mg isotope characteristics(averageδ^(26)Mg of-0.33‰,n=50)and high Ca O content(overall greater than 6.5 wt%),indicating that the lithospheric mantle would also record the metasomatism by the carbonate rocks from the subducting oceanic *** the background of the rollback of the subducting paleo-Pacific slab and the destruction of the North China Craton,partial melting of the lower crust would produce granitic ma

关键词： Jiaodong-type gold deposits Mantle fluids Metasomatized lithospheric mantle Source of gold Tectonic regime transition

The Formation of the Jiaodong Gold Province

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Acta Geologica Sinica(English Edition) 2022年第6期96卷 1801-1820页

作者： DENG Jun WANG Qingfei LIU Xuefei ZHANG Liang YANG Liqiang YANG Lin qiu kunfeng GUO Linnan LIANG Yayun MA Yao State Key Laboratory of Geological Processes and Mineral Resources China University of GeosciencesBeijing 100083China Chengdu Center China Geological SurveyChengdu 610081China School of Civil and Resource Engineering University of Science and Technology BeijingBeijing 100083China

Gold deposits in Jiaodong,termed Jiaodong-type,are tectonically located in the southeastern margin of the North China *** major features are reviewed in this paper to highlight the differences between Jiaodong deposits and other genetic types of gold *** mineralization was synchronized with asthenosphere upwelling indicated by synore OIB-like mafic dike and large-scale crustal thinning suggested by decrease of Sr/Y from pre-ore to syn-ore *** upwelling induced by the roll-back of Paleo-Pacific Plate drove partial melting of lithospheric mantle and devolatilization,which induced the release of the ore-forming *** concomitant with magmatic records,mineralization migrated from the western Jiaobei terrane(133–127 Ma)to the eastern Sulu orogenic belt(114–108 Ma),corresponding to the eastward roll-back of Paleo-Pacific *** mineralization in Jiaodong formed in the transitions of ductile to brittle deformation,rapid to slow crustal uplift,and regional compression to *** the regional-scale,the gold deposits in the Jiaobei terrane are mostly situated at intersections between NE-trending faults and EW-trending basement faults,and gold orebodies dominantly controlled by the lithologic contacts between Precambrian metamorphic rocks and Mesozoic *** mineralization was dominated by the disseminated-veinlet ores related to quartz–sericite alteration in strong cataclasite-breccia zone,with subsidiary thick quartz-sulfide veins developed in secondary fault *** ore-forming fluids belong to a H_(2)O–CO_(2)–NaCl±CH_(4)system and show minor variations in salinity among different types of ***-fluid feedback involving fluid-rock reaction and hydrofracturing triggered the fluid phase separation and resultant gold *** Jiaodong gold deposits are distinct from orogenic and intrusion-related gold deposits in terms of tectonic setting,origin of ore-forming fluids,and mechanism of gold deposition.

关键词： Jiaodong-type geodynamic trigger ore-controlling structure ore-forming fluids structure-fluid feedback mineralization model

Recognizing Relative Depth of Porphyry Systems:Case Histories of the Wenquan and Taiyangshan deposits,Western Qinling, China

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吉林大学学报(地球科学版) 2015年第S1期 787-788页

作者： kunfeng qiu Jun Deng Liqiang Yang James Reynolds Thomas Monecke China University of Geosciences U. S. Geological Survey Denver Federal Center FLUID INC. Denver Colorado 80202 USA Colorado School of Mines Golden Colorado 80401 USA

Porphyry systems(i.e.,including porphyry copper,skarn,and epithermal deposits),defined as large volumes of hydrothermally altered rock centered on porphyry stocks,are one of the world’s most important repositories of copper,molybdenum,and ***,constructing detailed genetic models for porphyry systems is instrumental to increase our capability to discover a category of mineral deposits to our ***

关键词： instrumental constructing altered molybdenum stocks rock quartz inclusion magma salinity

Recognizing Relative Depth of Porphyry Systems:Case Histories of the Wenquan and Taiyangshan deposits,Western Qinling, China

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Recognizing Relative Depth of Porphyry Systems:Case Historie...

石英Ti/Ge-P:基于机器学习的矿床类型判别新图解

中国矿物岩石地球化学学会第15届学术年会

作者： kunfeng qiu Jun Deng Liqiang Yang James Reynolds Thomas Monecke China University of Geosciences U. S. Geological Survey Denver Federal Center

＜正＞Porphyry systems（i.e.,including porphyry copper,skarn,and epithermal deposits）,defined as large volumes of hydrothermally altered rock centered on porphyry stocks,are one of the world’s most important repositories of copper,molybdenum,and ***,constructing detailed genetic models for porphyry systems is instrumental to increase our capability to discover a category of mineral deposits to our ***

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岩石学报 2022年第1期38卷 281-290页

作者：王瑀邱昆峰侯照亮于皓丞中国地质大学(北京)地球科学与资源学院北京100083 中国地质大学地质过程与矿产资源国家重点实验室北京100083 维也纳大学地质系维也纳1090

石英的微量元素记录了石英生长的物理化学条件。通过微量元素对石英原岩进行分类的研究历史已久,经典工作是在以微量元素为坐标轴的图解上绘制各类型石英的分布范围,以区分石英类型。经典图解包括Rusk(2012)提出用于区分三种矿床类型石... 详细信息

石英的微量元素记录了石英生长的物理化学条件。通过微量元素对石英原岩进行分类的研究历史已久,经典工作是在以微量元素为坐标轴的图解上绘制各类型石英的分布范围,以区分石英类型。经典图解包括Rusk(2012)提出用于区分三种矿床类型石英的Al-Ti二元图解,和Schr9n et al.(1988)提出的用于判别不同岩浆岩类型石英的Ti-Al-Ge三元图解。越来越多的研究表明,上述图解不能满足对更多石英类型进行分类的需求,同时也出现与部分已知产状类型的石英微量元素判别相矛盾的情况。随着石英原位微区测试方法的成熟,高精度石英微量元素数据逐渐丰富为系统开展机器学习提供了大数据基础,为石英微量元素研究提供了新的角度和可能性。本研究运用机器学习分类方法对石英微量元素进行精确数学分析,提出Ti/Ge-P图解为石英成因研究提出新的地球化学指标。本文同时测试了六种经典机器学习分类算法,提高Ti/Ge-P图解在石英成因分类研究上的精度。此Ti/Ge-P图解适用于多种矿床研究,包括但不局限于斑岩型矿床、矽卡岩型矿床、浅成低温热液型矿床、卡林型矿床以及造山型矿床中的石英。这项工作是大数据技术与机器学习技术在地球化学研究中的积极探索。

关键词：石英微量元素 Ti/Ge-P判别图解形成环境大数据分析机器学习

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西秦岭温泉斑岩钼矿床岩浆-热液演化

岩石学报 2015年第11期31卷 3391-3404页

作者：邱昆峰宋开瑞宋耀辉中国地质大学地质过程与矿产资源国家重点实验室北京100083 美国地质调查局丹佛中心丹佛80225 核工业航测遥感中心石家庄050000

西秦岭北缘广泛出露印支期中酸性侵入岩和相关的斑岩-矽卡岩矿床。温泉矿床位于该矿带东段,是其内已探明规模最大的斑岩钼矿床。温泉矿床发育多阶段热液脉体,黄铁矿作为其中的贯通性金属硫化物,其化学组成蕴含着岩浆-热液演化及金属沉... 详细信息

西秦岭北缘广泛出露印支期中酸性侵入岩和相关的斑岩-矽卡岩矿床。温泉矿床位于该矿带东段,是其内已探明规模最大的斑岩钼矿床。温泉矿床发育多阶段热液脉体,黄铁矿作为其中的贯通性金属硫化物,其化学组成蕴含着岩浆-热液演化及金属沉淀过程等诸多信息,对于斑岩系统模型的厘定具有重要意义。温泉矿床热液脉体时序为:钾长石-黑云母-石英脉(A脉)、石英-黄铜矿脉、石英-辉钼矿脉(B脉)和石英-绢云母-黄铁矿脉(D脉)。A脉是斑岩系统岩浆-热液演化的最早期脉体,主要矿物组合为钾长石+黑云母+石英+黄铁矿±磁铁矿±磷灰石±黄铜矿,代表了引起早期基性岩浆矿物被蚀变为黑云母的流体通道;B脉与钾长石化蚀变关系密切,围岩中斜长石斑晶大量被蚀变为钾长石;石英-辉钼矿脉切割所有早期黑云母化-钾化蚀变阶段的石英-硫化物网脉,并形成于所有斑岩侵位之后,少量黄铁矿和黄铜矿共生于辉钼矿裂隙及边部;D脉是斑岩系统岩浆-热液成矿作用的最晚期事件,其主要被黄铁矿和石英及少量黄铜矿填充,发育晚期的绢英岩化和泥化蚀变,长石多发生破坏性蚀变。四个阶段石英网脉中黄铁矿电子探针分析显示,A脉的黄铁矿中Cu、Mo和Au含量均较低,有少量的金属硫化物(黄铁矿+黄铜矿)沉淀,但通常不能形成规模矿体;石英-黄铜矿脉的黄铁矿中Cu含量明显较高,且多与高品位Cu矿体的空间产出位置相一致,可能是斑岩系统伴随钾化蚀变作用主要的铜沉淀阶段;B脉的黄铁矿中Mo含量明显较高,与高品位钼矿体空间产出关系密切,可能代表了斑岩系统钼成矿作用的主要阶段;D脉的黄铁矿中Au含量明显升高,可能代表了金在斑岩系统岩浆-热液成矿作用的最晚期事件中的沉淀。

关键词：岩浆-热液作用石英网脉黄铁矿微量元素温泉矿床西秦岭

磷灰石Eu/Y-Ce:基于大数据的源区类型判别新图解

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岩石学报 2022年第1期38卷 291-299页

作者：周统邱昆峰王瑀于皓丞侯照亮中国地质大学(北京)地球科学与资源学院北京100083 中国地质大学地质过程与矿产资源国家重点实验室北京100083 维也纳大学地质系维也纳1090

磷灰石广泛分布于火成岩、沉积岩和变质岩中,是一种常见的、包含丰富微量元素的副矿物。磷灰石晶格可容纳丰富的微量元素,且因其形成的物理化学条件不同会表现出差异明显的微量元素特征。利用磷灰石微量元素特征可以追踪物质来源和演化... 详细信息

磷灰石广泛分布于火成岩、沉积岩和变质岩中,是一种常见的、包含丰富微量元素的副矿物。磷灰石晶格可容纳丰富的微量元素,且因其形成的物理化学条件不同会表现出差异明显的微量元素特征。利用磷灰石微量元素特征可以追踪物质来源和演化。现在常用的方法是利用磷灰石的微量元素绘制二元判别图解,经典判别图解包括Sr-Y、Sr-Mn、Y-(Eu/Eu^(*))和(Ce/Yb)_(N)-REE图解。随着微区测试技术发展,磷灰石微量元素数据日渐丰富,同时由于磷灰石化学成分的复杂性,传统图解已逐渐无法有效利用这些数据所携带的信息,进而无法准确判别其生成环境。建立能准确判别磷灰石物源的新型判别图解故而迫切。近年来,磷灰石微量元素数据的大量积累,为运用以大数据为依托,准确判别磷灰石物源奠定了数据基础。本研究将大数据技术与地球化学数据相结合,共收集整理了1925个代表性磷灰石测试点的微量元素数据,对富碱性火成岩、超镁铁质岩石、镁铁质火成岩、长英质花岗岩、中-低级变质岩、高级变质岩六种类型中磷灰石微量元素数据进行穷举端元处理,共获得7140个磷灰石物源判别图解端元组合,在轮廓系数限定下,进一步有效筛选并提取出能判别磷灰石物源类型的最优图解端元。本文构建了Eu/Y-Ce磷灰石判别新图解,相较于之前的磷灰石判别图解,其涵盖了更全面的物源类型,可以更准确地判别源区类型。

关键词：磷灰石微量元素物源判别大数据分析 Eu/Y-Ce判别图解

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Delay-Range-Dependent Robust Exponential Stabilization for Uncertain System with Mode-Dependent Time Delays and Markovian Jump Parameters

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Delay-Range-Dependent Robust Exponential Stabilization for U...