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Sulfur isotope geochemistry of the Lemachang independent Ag {1., northeastern Yunnan——A concurrent discussion on the mechanism of sulfur isotope equilibrium between barite and freibergite below 300℃

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chinese Science Bulletin 1999年第S2期44卷 227-230页

作者： deng hailin~1, li chaoyang~1, zhou yunman~2 and wang Congwu~2 1. open laboratory of ore deposit geochemistry, institute of geochemistry, chinese academy of sciences, guiyang 550002, china 2. No.3 Braneh of No.1 Geology Party, Yunnan Bureau of Geology and Mineral Resources, Xundian 655205, china open {1. of ore deposit geochemistry Institute of Geochemistry Chinese Academy of Sciences Guiyang 550002 China No. 3 Branch No. 1 Geology Party Yunnan Bureau of Geology and Mineral Resources Xundian 655205 China

IN the study of hydrothermal deposits sulfur isotopes bear much information about the source of sulfur,{1.-forming temperature, the evolution of {1.-forming fluids and the mechanism of metallogenesis. Todetermine whether sulfur isotopes reach equilibrium between fluids and sulfur-bearing minerals precipitated from the former and among the sulfur-bearing minerals is the key to the application of sulfur isotopegeochemistry to geological problems. As it has been commonly accepted that sulfur isotopic equilibrium could not be reached between sulfate and sulfide below 350℃, little attention has been paid to thepossible mechanism of sulfur isotope equilibrium between sulfate and sulfide below 300℃. However, this note presents an example to show sulfur isotope equilibrium between barite and sulfate

关键词： sulfur isotope Lemachang independent Ag deposit barite freibergite sulfur isotope equilibrium below 300℃.

Geochemical constraints from hydrothermal fluid inclusions of altered deformation zone type Au(Ag)deposits in Yunkai area, South{1.

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chinese Science Bulletin 1999年第S2期44卷 230-232页

作者： wang Zuwei~1. ZHANG Haihua~2, YAO Dong{1.ang~2 and zhou Yongzhang~3 1. Department of Geography, Tianjin Normal University, Tianjin 300071. china 2. Guangzhou institute of geochemistry, chinese academy of sciences, Guangzhou 51.640, china 3. Department of Earth sciences, Zhongshan University, Guangzhou 51.275, china eeszhou@*** Department of Geography Tianjin Normal University Tianjin 300071 China Guangzhou {1. of geochemistry Chinese Academy of Sciences Guangzhou 510640 China Department of Earth sciences Zhongshan University Guangzhou 510275 China

THE altered deformation zone type Au (Ag) deposits share an important part from the precious metal{1.core deposits in the Yunkai area, South china. Their formation is a history of poly-stage evolution. Pre- {1.minary source strata, Ca{1.doniam metamorphism, Indosinian-Yanshanian ductile shear deformation andassociated hydrotheraml alteration all play certain roles in the history. This note discusses the geochemical conditional of the hydrothermal fluids during minera{1.zation. Two representative ore deposits, the Pangxidong Ag(Au) deposit and Hetai Au deposits are selectedfor this study. They are hosted in altered ductile shear zones. Wall-rock hydrothermal alteration is bothspatially and temporally associated with the development of the ductile shear system. Si{1.cification occurred throughout the whole alteration process. There are three groups of quartz: thepredeformational quartz, the early stage hydrothermal quartz, and the late stage hydrothermal quartz asso-

关键词： precious metallic deposit fluid inclusions mineralizing fluid South china.

Sulfur Isotopes geochemistry of the Nage Cu-Pb Polymetal{1.c deposit,Southeast Guizhou Province,china

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矿物学报 2009年第S1期29卷 128-128页

作者： LONG Xuan-lin1,zhou Jia-xi2,HUANG Zhi-long2,wang Jing-song1,YANG De-zhi1,3,FAN liang-wu2,BAO Guang-ping2,liU Yong-kun1(1. The 102 Geological Team,Guizhou Bureau of Exploration and Development of Geology and Mineral Resources,Zunyi 563003,china 2. State key laboratory of ore deposits geochemistry,institute of geochemistry,chinese academy of Science,guiyang 550002,china 3. china University of Geosciences(Wuhan) ,Wuhan 430074,china) evidence.

The Nage Cu-Pb polymetallic {1. is located in the transitional zone of the Yangtze craton and cathaysia,that is the southwest of Jiangnan orogenic belt. The mainly strata are Wentong formation of Mesoproterozoic Sibo group and the Jialu formation(Qbj) ,Wuye formation(Qbw) ,Fanzhao formation(Qbf) and Gongdong formation(Qbg) of the Neoproterozoic Qingbaikou System Xiajiang group.

关键词： Pb Sulfur Isotopes geochemistry of the Nage Cu-Pb Polymetal{1.c deposit,Southeast Guizhou Province,china Cu

与碱性岩-碳酸岩杂岩共生的铌-稀土成矿作用——兼论东昆仑大格勒铌-稀土矿床中的碱性岩-碳酸岩杂岩成因

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大地构造与成矿学 2024年第1期48卷 1-37页

作者：王强李五福王秉璋王涛周金胜马林李玉龙袁博武王春涛王军张新远刘建栋薛尔堃胡万龙黄彤宇李旺超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 青海省地质调查院青藏高原北部地质过程与矿产资源重点实验室青海西宁810012 中国科学院大学北京100049

铌(Nb)和稀土(REE)分别是我国重要的紧缺、优势战略矿产资源,其中Nb对外依存度接近1.0%。Nb和REE矿床在全世界(包括中国)都有分布,这类矿床中的矿石矿物种类繁多,但目前工业提取REE的矿石矿物主要为富轻稀土的氟碳铈矿、独居石,富重稀... 详细信息

铌(Nb)和稀土(REE)分别是我国重要的紧缺、优势战略矿产资源,其中Nb对外依存度接近1.0%。Nb和REE矿床在全世界(包括中国)都有分布,这类矿床中的矿石矿物种类繁多,但目前工业提取REE的矿石矿物主要为富轻稀土的氟碳铈矿、独居石,富重稀土、钇的磷钇矿,风化壳淋积型黏土矿等,而工业提取Nb元素的矿石矿物主要为烧绿石和铌铁矿等。与碱性岩-碳酸岩杂岩有关的Nb、REE矿床等是铌与稀土(尤其是轻稀土)资源最重要的来源。自然界中的Nb矿床分布较广,但绝大部分Nb资源集中在全球约十多个大型矿床中,且主要与碱性岩-碳酸岩及其相关的风化产物有关。碱性岩-碳酸岩杂岩主要来自地幔,且产出于一些特殊的构造背景(如裂谷或陆内伸展、碰撞后伸展、地幔柱、火山弧等),是研究深部地幔富集与熔融过程、物质(如碳)循环和深部动力学机制的重要“岩石探针”,是当前固体地球科学研究的前沿和热点领域之一。因此,研究碱性岩-碳酸岩杂岩的形成机制及相关的Nb-REE成矿作用,具有极其重要的地球动力学和关键金属成矿意义。在东昆仑新发现了与碱性岩-碳酸岩杂岩共生的大格勒Nb-REE矿,成矿岩石主要为碳酸岩、金云母岩和橄榄岩,包含多种含Nb、富REE和含P矿物,初步确定为碳酸岩型Nb-REE-P矿床。Nb矿体中最重要的含Nb矿石矿物是铌钙矿和铌铁矿,其Nb_(2)O_(5)含量最高分别达81.1.%、76.06%~79.67%,粒径最大分别可达1.2 mm、~1.mm,粒径和赋存形式明显优于白云鄂博矿床(粒径2)O_(5)平均品位0.092%~0.1.6%(最高1.28%),估算Nb_(2)O_(5)推断资源量超过1.万吨,表明大格勒矿区Nb资源已经达到大型矿床规模。矿区杂岩体中镁铁质-超镁铁质岩和碳酸岩主要形成于早泥盆世早期(~41.Ma),明显富集Nb、Ta、P和Sr等,具有相对稳定的ε_(Nd)(t)(-0.5~2.7)和变化的(^(87)Sr/^(86)Sr)i(0.7037~0.7063)。这些岩石主要起源于软流圈地幔,可能形成于碰撞后伸展背景中。但是大格勒矿区成岩与成矿的精确时代、岩浆来源与岩浆储库演化过程、岩石与矿床形成的深部动力学机制、金属超常富集与成矿作用、成矿元素的赋存状态与可利用性等还需要进一步深入研究。

关键词：碱性岩碳酸岩铌矿稀土矿岩石成因东昆仑青藏

武夷-云开造山带早古生代镁铁-超镁铁质岩富钪风化壳的首次发现及其意义

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矿物学报 2024年第3期44卷 303-316页

作者：周美夫赵文周岱杨胜标申宇王振朝漆亮王敏陈伟中国科学院地球化学研究所贵州贵阳550081 中国地质大学(武汉)资源学院湖北武汉430074 中国地质调查局武汉地质调查中心湖北武汉430205

本文首次报道华南古生代武夷-云开造山带东南缘的兰排镁铁-超镁铁质岩体富钪(Sc)风化壳,初步计算获得区域内钪的潜在资源为524~566 t,为一潜在大型风化壳型钪矿。兰排岩体呈小型岩株侵入到永和闪长质岩体内,主要由橄榄岩、辉石岩和辉长... 详细信息

本文首次报道华南古生代武夷-云开造山带东南缘的兰排镁铁-超镁铁质岩体富钪(Sc)风化壳,初步计算获得区域内钪的潜在资源为524~566 t,为一潜在大型风化壳型钪矿。兰排岩体呈小型岩株侵入到永和闪长质岩体内,主要由橄榄岩、辉石岩和辉长岩组成,辉石岩锆石^(206)Pb/^(238)U年龄为(428.3±2.0)Ma(MSWD=0.92)。镁铁-超镁铁质岩全岩w(TFe_(2)O_(3))为1..1.~1..7%,其中辉石岩钪含量为44×1.^(–6)~97×1.^(–6),总体高于橄榄岩(20×1.^(–6)~89×1.^(–6))和辉长岩(28×1.^(–6)~48×1.^(–6))。兰排这类富钪岩石组合与以往认为富钪的碳酸岩-碱性岩体和阿拉斯加型岩体都存在较大差异,可能代表了一种新的钪成矿母岩类型,推测碰撞后陆内伸展诱发富钪地幔源区熔融可能是富钪母岩浆形成的重要机制。镁铁-超镁铁质岩体上部发育完整的风化壳剖面,可分为全风化层和半风化层。全风化层的上部富集铁(氢)氧化物(磁铁矿、赤铁矿、针铁矿),而中下部以高岭石等黏土矿物为主。半风化层除了包含蒙脱石等黏土矿物,还包括铁钛氧化物及辉石等硅酸盐矿物或相关蚀变矿物。风化壳样品的Sc含量为21.1.^(–6)~304×1.^(–6),富集程度最高可达相应基岩的3倍以上。其中,钪含量最高的样品主要分布在铁氧化物最富集的全风化层上部,其钪含量多数超过1.0×1.^(–6)。风化壳钪含量与红土化指数(IOL)呈明显的正相关性,表明红土化过程对风化壳钪的富集有显著影响。初步研究认为钪在风化壳红土化过程中经历了活化-迁移-沉淀的多阶段富集过程:1.风化早期钪以类质同象替换的形式赋存在蒙脱石等黏土矿物中;2)风化后期磁铁矿和蒙脱石溶解,钪赋存在以铁(氢)氧化物为主的矿物中,并达到最高程度的富集(Sc>1.0×1.^(–6));3)风化晚期铁(氢)氧化物溶解,一部分钪向下迁移到特定层位。兰排镁铁-超镁铁质岩体富钪风化壳的发现弥补了我国高品位风化壳型钪矿床的空白,丰富了成矿母岩的类型,为华南早古生代成矿作用的理论研究和战略性矿产的找矿勘查提供了一个新的方向。

关键词：风化壳型钪矿床武夷-云开造山带镁铁-超镁铁质岩红土化指数

粤北左坑离子吸附型稀土矿床含矿岩体地球化学特征与稀土元素迁移‒富集机理

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大地构造与成矿学 2024年第2期48卷 259-269,I0001-I0004页

作者：李莎莎汪礼明熊子良刘东宏张富铁刘浏黄凯周忠帅杨胜虎欧阳志侠中国科学院广州地球化学研究所矿物学与成矿学重点实验室广东广州510640 广东省有色地质勘查院广东广州510089 广东省有色金属地质局广东广州510080

广东省新丰县左坑大型稀土矿床为典型的华南离子吸附型矿床,位于佛冈复式岩体的北部,已查明稀土矿石量1.1.2万吨,总稀土氧化物(TREO)资源量约1.万吨,离子相稀土氧化物(SREO)资源量约1.万吨。对该矿床成矿母岩黑云母花岗岩进行主量和稀... 详细信息

广东省新丰县左坑大型稀土矿床为典型的华南离子吸附型矿床,位于佛冈复式岩体的北部,已查明稀土矿石量1.1.2万吨,总稀土氧化物(TREO)资源量约1.万吨,离子相稀土氧化物(SREO)资源量约1.万吨。对该矿床成矿母岩黑云母花岗岩进行主量和稀土元素分析发现,其岩石性质和地球化学特征与佛冈花岗岩主体类似,同属于高硅、富碱、贫钙镁的铝质A型花岗岩。对6个钻孔的SREO含量、TREO含量、离子相稀土氧化物析出率、地理位置、成矿母岩稀土含量等信息进行对比研究后发现:①基岩稀土含量相似的情况下,产出于山顶的矿体上方风化壳厚度越大,形成矿体所需要的离子相稀土氧化物析出率越小;②稀土元素在成矿母岩浆中完成初始富集后,进而在风化过程中完成二次富集,还可能在剥蚀过程中随地表水下渗迁移至风化壳中渗透系数更小的位置完成第三次富集。因此,在离子吸附型稀土矿床中影响稀土元素垂向分布模式的因素除了风化壳中水体pH值和水化学类型外,还需考虑静水面与矿体的相对位置和渗透系数的共同作用。

关键词：离子吸附型稀土矿床稀土元素离子相析出率富集倍数静水面渗透系数

西昆仑白龙山伟晶岩型稀有金属矿床地质特征及成矿时代

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大地构造与成矿学 2024年第2期48卷 380-393页

作者：周楷麟王核闫庆贺张晓宇高昊王振宏朱宝彰白洪阳董瑞中国科学院广州地球化学研究所矿物学与成矿学重点实验室广东广州510640 中国科学院大学北京100049

白龙山锂铷伟晶岩型稀有金属矿床位于西昆仑造山带甜水海地体,是一新发现的超大型锂‒铷‒(铍‒钽‒铌)矿床。本文对白龙山矿区伟晶岩的区域和内部分带进行了详细划分,发现大多数贫矿伟晶岩靠近白龙山花岗岩体,而矿化伟晶岩相对离岩体较远... 详细信息

白龙山锂铷伟晶岩型稀有金属矿床位于西昆仑造山带甜水海地体,是一新发现的超大型锂‒铷‒(铍‒钽‒铌)矿床。本文对白龙山矿区伟晶岩的区域和内部分带进行了详细划分,发现大多数贫矿伟晶岩靠近白龙山花岗岩体,而矿化伟晶岩相对离岩体较远。白龙山伟晶岩型稀有金属矿床中锡石LA-MC-ICP-MS U-Pb同位素定年结果显示,矿化伟晶岩(石英‒锂辉石带)和未矿化伟晶岩脉(石英‒长石‒白云母带)分别得到21. Ma和21. Ma年龄,表明白龙山稀有金属伟晶岩形成于晚三叠世。结合二者区域分带的空间连续性和前人研究,认为矿区矿化和未矿化伟晶岩应属于同一构造‒岩浆事件的产物,它们均形成于碰撞后的伸展环境。在区域上,甜水海地体是松潘‒甘孜地块的西延展,西昆仑稀有金属成矿带可能与松潘‒甘孜稀有金属成矿带相连,构成一个超过2000 km的巨型稀有金属成矿带。

关键词：白龙山伟晶岩锂矿床成矿年龄西昆仑

Role of metasomatized mantle lithosphere in the formation of giant lode gold {1.s:Insights from sulfur isotope and geochemistry of sulfides

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Geoscience Frontiers 2023年第5期14卷 153-172页

作者： Baisong Du Zuoman wang M.Santosh Yuke Shen Shufei {1.u Jiajun {1.u Kexin Xu Jun deng china National Gold Group Corporation {1.mited Beijing 100011China State Key laboratory of Geological Processes and Mineral Resources School of Earth Sciences and ResourcesChina University of Geosciences(Beijing)Beijing 100083China Department of Earth Science University of AdelaideAdelaide SA 5005Australia laboratory of Dynamic Digenesis and Metallogenesis Institute of GeomechanicsChinese Academy of Geological SciencesBeijing 100081China State Key laboratory for Mineral {1.s Research Nanjing UniversityNanjing 210046China

The Wulong deposit is one of the largest quartz vein-type gold deposits with at least 80 tons of identified gold reserves in the eastern part of the liaodong *** orebodies are mainly hosted in the Late Jurassic gneissic two-mica granite and Early Cretaceous diorite dykes,and are structurally controlled by the NNE-and NW-trending *** mineralization mainly occurs as veins with lenticular shapes and is closely associated with sulfides and Bi *** studies on the deposit mainly focused on its geological characteristics,fluid inclusions and the timing of gold ***,the extreme enrichment mechanism of gold,the geodynamic setting and ore source of the gold deposit remain *** we present results from geochemical studies of pyrite and pyrrhotite at Wulong to address these *** can be grouped into euhedral(Po1.and anhedral(Po2)varieties based on the *** generations of pyrite were identified based on petrographic studies:Py1.is coarse-grained subhedral to euhedral crystal coexisting with milky quartz,and Au-depleted in composition;Py2 is represented by medium-grained,subhedral to anhedral pyrite coexisting with euhedral Po1.smoky quartz and minor chalcopyrite;Py3 occurs as fined-grained anhedral grains in the quartz-polymetallic sulfide veins;Py4 occurs as veinlets or aggregates in the quartz-calcite veins and contains the lowest Au *** time-resolved LA-ICP-MS ablation depth profiles of sulfides combined with detailed petrological observations indicate that gold mainly occurs either as invisible solid solution within the crystal lattice of sulfides,to some extent,or as small blebs of native gold and *** close temporal and spatial relationships among native bismuth,native gold and Bi-Te-S minerals suggest that Bi-rich melts may have significantly sequestered gold from the hydrothermal fluids in the Wulong gold *** from auriferous quartz veins have a restricted D

关键词： Sulfides Sulfur isotope Wulong gold deposit liaodong Peninsula

Generation of Permian Ni-Cu Sulfide deposits in the East Tianshan(NW{1.) by Syn-collisional Mantle Derived Magmatism

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Acta Geologica Sinica(English Edition) 2015年第A2期89卷 87-88页

作者： SONG Xieyan CHEN liemeng {1. Yufeng XIE Wei State Key laboratory of {1. deposit geochemistry Institute of GeochemistryChinese Academy of Sciences

A series of Ni-Cu sulfide deposits hosted in Early Permian mafic-ultramafic complexes occur along the -500 km long {1.near Huangshan-Jingerquan belt in the East Tianshan at the southern margin of the Central Asian Orogenic Belt （Fig. 1. （zhou et al., 2004; Song and {1.,2009; Song et al., 201. ; Qin et al., 201. ; deng et al., 201.）.

关键词： RESEARCH Nickel Copper Ultrabasic rocks Sulfides Mines & mineral resources china