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西南低温成矿域Au-Sb-Hg-Pb-Zn矿床方解石REE地球化学特征及找矿指示
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作者 付浩 王加昇 +4 位作者 常晋阳 王燕 王博 叶彬 李浩宇 《矿物学报》 CAS CSCD 北大核心 2024年第1期43-57,共15页
西南大面积低温成矿域是我国Au、Sb、Hg、Pb-Zn等中低温热液矿床的重要基地,各种热液矿床之间是否存在成因关系仍是一个悬而未决的科学问题。方解石是各种热液矿床的重要脉石矿物,本文选择上述各种中低温矿种中的丫他卡林型金矿床、晴隆... 西南大面积低温成矿域是我国Au、Sb、Hg、Pb-Zn等中低温热液矿床的重要基地,各种热液矿床之间是否存在成因关系仍是一个悬而未决的科学问题。方解石是各种热液矿床的重要脉石矿物,本文选择上述各种中低温矿种中的丫他卡林型金矿床、晴隆-巴年锑矿床、拉峨汞矿床、会泽铅锌矿床等作为典型矿床,并对矿床中出露的成矿和非成矿期方解石进行REE对比研究。结果发现,不同类型矿床成矿期方解石明显具有不同的REE特征,卡林型金矿床中显示MREE富集,锑矿床显示M-HREE富集的特征,说明金、锑矿床的成矿流体来源可能与深部隐伏花岗岩体有关;Pb-Zn-Hg矿床整体显示LREE富集,Hg矿床与标准海相碳酸盐岩LREE富集的配分模式一致,但Pb-Zn矿床中轻稀土元素内部具有La、Ce亏损的左倾特征,说明Hg矿床成矿流体可能主要来自于大气降水对赋矿海相碳酸盐岩的溶解作用,铅锌矿床成矿流体可能来自于盆地卤水浸取基底地层及其围岩所形成的混合流体。无论何种矿种,与成矿无关的方解石均具有LREE富集的特征,方解石的上述REE配分模式特征也可作为各种类型热液矿床的重要找矿标志。 展开更多
关键词 au-sb-hg-Pb-Zn矿床 方解石 稀土元素 西南大面积低温成矿域
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扬子地块西南缘低温成矿域Au、Sb、Hg、As矿床区域分布上的共生分异及控制因素 被引量:6
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作者 孙国胜 胡瑞忠 +2 位作者 苏文超 王国芝 朱赖民 《地质地球化学》 CAS CSCD 2003年第4期50-55,共6页
扬子地块西南缘大面积低温成矿域的Au、Sb、Hg、As矿床,常出现共生分异的现象,在空间上形成Au、Sb、Hg、As矿床、矿带相伴出现而又相对独立的规律性分布。在详细研究Au、Sb、Hg、As矿床、矿带区域分布及其产出地质背景的基础上,从不同... 扬子地块西南缘大面积低温成矿域的Au、Sb、Hg、As矿床,常出现共生分异的现象,在空间上形成Au、Sb、Hg、As矿床、矿带相伴出现而又相对独立的规律性分布。在详细研究Au、Sb、Hg、As矿床、矿带区域分布及其产出地质背景的基础上,从不同的角度,对制约Au、Sb、Hg、As矿床、矿带共生分异的因素进行了探讨。 展开更多
关键词 低温成矿域 共生分异 控制因素 扬子地块西南缘
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Fluid inclusion evidence for the involvement of organic matter in mineralization of Hg, Sb and Au deposits
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作者 SHI Jixi~1 and WANG Huayun~2 1. Open Laborator of Ore Deposit Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550002, China 2. Institute of Guizhou Provincial Bureau of Geology and Mineral Resoarces, Guiyang 550001, China 《Chinese Science Bulletin》 SCIE EI CAS 1999年第S2期197-199,共3页
1 Research significance and study area GEOCHEMISTRY of organic matter in metallic ore deposits and the role of organic matter in metallogenesisare the hot subjects of research in the field of ore deposits and also a w... 1 Research significance and study area GEOCHEMISTRY of organic matter in metallic ore deposits and the role of organic matter in metallogenesisare the hot subjects of research in the field of ore deposits and also a weak link in this field. Widespreadin the areas of Tongren, Danzhai, etc. in eastern Guizhou (simplified as southeastern Guizhou or Qiandongnan below) are large-sized Hg (dominant), Sb, and Au deposits, while in the areas of Qinglong,Xingren, Zhenfeng, Anlong, etc. In southwestern Guizhou (simplified as southwestern Guizhou orQianxinan below) are a number of large-sized and extremely large-sized microfine disseminated gold deposits and Sb and Hg deposits. Studies have shown that their ore-forming temperatures are estimated al【150℃ for Hg deposits, about 180℃ for Sb deposits and【200℃ for most Au deposits, respectively, allof them belonging to the typical low-temperature deposits. Not a few researchers have found bitumens 展开更多
关键词 organic matter fluid inclusion EPITHERMAL hg-sb-au deposit.
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滇东南地区Au-As-Sb-Hg地球化学异常及金矿地质条件 被引量:1
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作者 杨政学 杨飞祥 朱勇祥 《云南地质》 2022年第1期68-74,共7页
滇东南地区金矿床(点)及Au、As、Sb、Hg元素异常空间分布,受区域深大断裂、次级背斜、次级断裂构造控制明显。在此基础上初步总结了金矿成矿以背斜+断裂+有利岩性界面的有利地质条件。
关键词 au-As-sb-hg地球化学异常分布 控矿因素 褶皱-断裂构造 滇东南地区 云南
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Distribution and metallogenetic characteristics of Sb, Hg deposits in China
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作者 ZHANG Yuxu and LIU Menggeng Institute of Geology, Chinese Academy of Geological Sciences, Beijing 100037, China 《Chinese Science Bulletin》 SCIE EI CAS 1999年第S2期135-136,共2页
ANTIMONY and mercury deposits are very rich in China. But, most of them are located in the Yangtzeplatform and its neighboring area (Zhang Yuxu et al., 1996). It is usually considered that the Sb, Hgmineralizations ha... ANTIMONY and mercury deposits are very rich in China. But, most of them are located in the Yangtzeplatform and its neighboring area (Zhang Yuxu et al., 1996). It is usually considered that the Sb, Hgmineralizations have no relations to magmatism. The main genetic types of Sb, Hg deposits are hydrothermal and stratabound-hydrothermal (Liu Lansheng et al., 1996). If the orebodies cut through strata, the deposits are considered hydrothermal; if theorebodies are bedded or lenses paralell to strata, the deposits are considered stratabound-hydrothermal type. Sb often forms independent deposits, such as Xikuangshan deposit, western Hunan. And in a greatnumber of deposits, Sb and other metallic elements were mineralized together, such as Sn-Sb-Pb-Zn-Agin Dachang ore-field, northern Guangxi; W-Sb-Au in Woxi deposit, western Hunan; Sb-Pb-Zn inWuyu, northewestern Guangxi. 展开更多
关键词 DISTRIBUTION METALLOGENY sb-hg deposits China.
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Study on the evolution of ore-formation fluids for Au-Sb ore deposits and the mechanism of Au-Sb paragenesis and differentiation in the southwestern part of Guizhou Province, China 被引量:10
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作者 WANG Zepeng XIA Yong +3 位作者 SONG Xieyan LIU Jianzhong YANG Chengfu YAN Baowen 《Chinese Journal Of Geochemistry》 EI CAS CSCD 2013年第1期56-68,共13页
Ore deposits (occurrences) of Au, As, Sb, Hg, etc. distributed in Southwest Guizhou constitute the important portion of the low-temperature metallogenic domain covering a large area in Southwest China, with the Carlin... Ore deposits (occurrences) of Au, As, Sb, Hg, etc. distributed in Southwest Guizhou constitute the important portion of the low-temperature metallogenic domain covering a large area in Southwest China, with the Carlin-type Au and Sb deposits being the most typical ones. In this paper the Au and Sb ore deposits are taken as the objects of study. Through the petrographic analysis, microthermomitric measurement and Raman spectrophic analysis of fluid inclusions in gangue minerals and research on the S and C isotopic compositions in the gold ore deposits we can reveal the sources of ore-forming materials and ore-forming fluids and the rules of ore fluid evolution. Ore deposits of Au, Sb, etc. are regionally classified as the products of ore fluid evolution, and their ore-forming materials and ore fluids were probably derived mainly from the deep interior of the Earth. Fluid inclusion studies have shown that the temperatures of Au mineralization are within the range of 170-361℃,the salinities are 0.35 wt%-8 wt% NaCl eq.; the temperatures of Sb mineralization are 129.4-214℃ and the salinities are 0.18 wt%- 3.23 wt% NaCl eq.; the ore-forming fluid temperatures and salinities tend to decrease progressively. In the early stage (Au metallogenic stage) the ore-forming fluids contained large amounts of volatile components such as CO2, CH4, N2 and H2S, belonging to the H2O-CO2-NaCl fluid system; in the late stage (Sb metallogenic stage) the ore-forming fluids belong to the Sb-bearing H2O-NaCl system. The primitive ore-forming fluids may have experienced at least two processes of immiscibility: (1) when early ore-bearing hydrothermal solutions passed through rock strata of larger porosity or fault broken zones, CO2, CH4, N2 would escape from them, followed by the release of pressure, resulting in pressure release and boiling of primitive homogenous fluids, thereafter giving rise to their phase separation, thus leading to Au unloading and mineralization; and (2) in the late stage (Sb metallogenic stage ) a large volume of meteoric water was involved in the ore-forming fluids, leading to fluid boiling as a result of their encounter, followed by the drop of fluid temperature. As a result, the dissolubility of Sb decreased so greatly that Sb was enriched and precipitated as ores. Due to differences in physic-chemical conditions between Au and Sb precipitates, Au and Sb were respectively precipitated in different structural positions, thus creating such a phenomenon of Au/Sb paragenesis and differentiation in space. 展开更多
关键词 成矿流体演化 中国西南地区 金锑矿床 分化 共生 贵州省 西南部 流体温度
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Geochemistry and geochronology of Late Jurassic and Early Cretaceous intrusions related to some Au(Sb) deposits in southern Anhui: a case study and review 被引量:1
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作者 Qing Hu Huangling Gu +3 位作者 Xiaoyong Yang Yisu Ren Ergen Gao Zhangxing Nie 《Acta Geochimica》 EI CAS CSCD 2018年第3期360-383,共24页
Some Au deposits in southern Anhui Province have recently been found to be closely associated with Late Mesozoic intrusions. Typical examples include the Huashan Au(Sb) deposit and Au deposits at Zhaojialing, Wuxi,and... Some Au deposits in southern Anhui Province have recently been found to be closely associated with Late Mesozoic intrusions. Typical examples include the Huashan Au(Sb) deposit and Au deposits at Zhaojialing, Wuxi,and Liaojia. In order to understand the mechanisms that led the formation of these Au deposits, we make detailed reviews on the geological characteristics of these Au deposits. Specifically, we present new LA-ICP-MS zircon U–Pb dating, along with elemental and Hf isotopic data from the Huashan Au(Sb) deposit. Our data suggests that the Huashan ore-related intrusions were emplaced during the Late Jurassic and Early Cretaceous periods(144–148 Ma). They are characterized by arc-magma features and high oxygen fugacity and are rich in inherited zircons. Zircon U–Pb ages and Lu–Hf isotopes from intrusions suggest that Proterozoic juvenile lithosphere is the main source of these intrusions. The regional geological history implies that lithosphere beneath southern Anhui was produced during a Proterozoic subduction and was fertilized with Au(Cu) in the process. Integrated with theresults of previous studies, we inferred that Late Mesozoic intrusions formed by the remelting of the lithosphere could provide the metal endowment for the Au-rich deposits in southern Anhui. 展开更多
关键词 Yanshannian magmatism Subduction-modified lithosphere au (sb) deposits SOUTHERN ANHUI South China
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柴北缘滩间山金矿区Au-As-Sb地球化学异常组合及其外围找矿预测应用 被引量:1
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作者 王进寿 安永尉 +4 位作者 李鹏 朱传宝 王莎 王建国 周豪 《矿产勘查》 2023年第4期608-615,共8页
Au-As-Sb地球化学异常组合在中低温热液型金矿床中常指示着矿体前缘晕相或中浅部矿体的出露,对剥蚀较弱的金矿床而言,该组合化探异常有利于指引造山型金矿床浅部金矿体的发现。不同于传统化探需测试数十个元素、处理上万个数据而圈定异... Au-As-Sb地球化学异常组合在中低温热液型金矿床中常指示着矿体前缘晕相或中浅部矿体的出露,对剥蚀较弱的金矿床而言,该组合化探异常有利于指引造山型金矿床浅部金矿体的发现。不同于传统化探需测试数十个元素、处理上万个数据而圈定异常的惯例,在柴北缘成矿带滩间山金矿区及外围水系沉积物研究中,采用Au-As-Sb元素组合特征分析方法圈定多个Au-As-Sb地球化学异常组合,大幅提高了水系沉积物勘查的工作效率。同时,R型聚类分析表明Au、As、Sb元素之间相关性强,与已发现的青龙沟、金龙沟大型造山型金矿床地质特征、主成矿期自然金+黄铁矿+毒砂+(黄铜矿+方铅矿+闪锌矿)矿石矿物组合、造山型金矿床连续成矿模型Au、As、Sb纵向变化规律等特点基本一致,表明该地区矿床赋存深度处于中浅成,预示着该矿床外围和深部具有较好找矿前景。 展开更多
关键词 au-As-sb组合 中低温热液型 成矿预测 滩间山金矿外围 柴北缘
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Regularities controlling the distribution of halogens in the Danzhai epithermal Hg-Au deposit in Guizhou and their significance
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作者 ZHANG Qian, PAN Jiayong and SHAO Shuxun Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550002, China 《Chinese Science Bulletin》 SCIE EI CAS 1999年第S2期146-148,共3页
HALOGENS, as mineralizer elements, have been attracting ever increasing attention of geological workers inpetrogenetically experimental and ore-forming fluid geochemical studies. However, little research workhas been ... HALOGENS, as mineralizer elements, have been attracting ever increasing attention of geological workers inpetrogenetically experimental and ore-forming fluid geochemical studies. However, little research workhas been done on the contents, variation characteristics and significance of halogens in solid ores(rocks). It is found in the study of the Danzhai Hg-Au deposit that (i) variations in the contents ofhalogens and their distribution regularities in solid rocks and ores can shed light on the formation of thedeposit; and (ii) halogens can serve the function of indicator elements in search of buried orebodies. 1 Main characteristics of the ore 展开更多
关键词 distribution regularity HALOGENS Danzhai EPITHERMAL hg-au DEPOSIT Guizhou.
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Gold and antimony metallogenic relations and ore-forming process of Qinglong Sb(Au) deposit in Youjiang basin, SW China: Sulfide trace elements and sulfur isotopes 被引量:10
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作者 Jun Chen Zhi-Long Huang +2 位作者 Rui-Dong Yang Li-Juan Du Ming-Yang Liao 《Geoscience Frontiers》 SCIE CAS CSCD 2021年第2期605-623,共19页
In the northwestern margin of the Youjiang basin(NWYB)in SW China,many Carlin-like gold deposits are highly antimony(Sb)-rich,and many vein-type Sb deposits contain much Au.These deposits have similar ages,host rocks,... In the northwestern margin of the Youjiang basin(NWYB)in SW China,many Carlin-like gold deposits are highly antimony(Sb)-rich,and many vein-type Sb deposits contain much Au.These deposits have similar ages,host rocks,ore-forming temperatures,ore-related alterations and ore mineral assemblages,but the Au and Sb metallogenic relations and their ore-forming process remain enigmatic.Here we investigate the large Qinglong Sb deposit in the NWYB,which has extensive sub-economic Au mineralization,and present a new metallogenic model based on in-situ trace elements(EPMA and LA-ICP-MS)and sulfur isotopes(NanoSIMS and fs-LA-MC-ICPMS)of the ore sulfides.At Qinglong,economic Sb ores contain coarse-grained stibnite,jasperoid quartz and fluorite,whilst the sub-economic Au–Sb ores comprise dominantly veined quartz,arsenian pyrite and fine-grained stibnite.Three generations of ore-related pyrite(Py1,Py2 and Py3)and two generations of stibnite(Stb1 and Stb2)are identified based on their texture,chemistry,and sulfur isotopes.The pre-ore Py1 is characterized by the lower ore element(Au,As,Sb,Cu and Ag)contents(mostly below the LA-ICP-MS detection limit)and Co/Ni ratios(average 0.31)than the ore-stage pyrites(Py2 and Py3),implying a sedimentary/diagenetic origin.The Py2 and Py3 have elevated ore element abundance(maximum As=6500 ppm,Au=22 ppm,Sb=6300 ppm,Cu=951 ppm,Ag=77 ppm)and Co/Ni ratios(average 1.84),and have positive As vs.Au–Sb–Cu–Ag correlations.Early-ore Stb1 has lower As(0.12–0.30 wt.%)than late-ore Stb2(0.91–1.20 wt.%).These features show that the progressive As enrichment in ore sulfides is accompanied by increasing Au,Sb,Cu and Ag with the hydrothermal evolution,thereby making As a good proxy for Au.As-rich,As-poor and As-free zones are identified via NanoSIMS mapping of the Au-bearing pyrite.The As-rich zones in the Qinglong Au-bearing pyrites(Py2 and Py3)and ore stibnites(Stb1 and Stb2)have narrowδ^(34)SH_(2)S ranges(-8.9‰to +4.1‰,average-3.1‰)and-2.9‰to +6.9‰,average + 1.3‰),respectively,indicating that the Au-rich and Sb-rich fluids may have had the same sulfur source.Published in-situ sulfur isotopic data of pyrite As-rich zones from other Carlin-like Au deposits(Shuiyindong,Taipingdong,Nayang,Getang and Lianhuashan)in the NWYB have similar ore-fluidδSH_(2)S values(-4.5‰to +6.7‰,average-0.6‰)to those of Qinglong.Therefore,we infer that the sulfur of both Au and Sb mineralization was derived from the same magmatic-related source(0±5‰)in the NWYB.Moreover,the core of pyrites(Py1)has variable S isotope fractionation(-18.9‰to +18.1‰,mostly +3‰to +12‰),suggesting that the higher-^(34)S H_(2)S was produced by bacterial sulfate reduction(BSR).The hydrothermal pyrite(Py2 and Py3)δ^(34)S values gradually decrease with increasing As concentrations,and ultimately,within the restricted range(-5‰to +5‰)in As-rich zones.This variation implies that the As-rich pyrite was formed through ongoing interactions of the magmatic-hydrothermal fluid with pre-existing sedimentary pyrites,causing the progressive decreasing δ^(34)S values with As content increase,Hence,the fluid/mineral interaction may have generated the observed variation in δ^(34)S and As contents.Overall,comparing the Au and Sb deposits in the NWYB,we favor a magmatic-related source for the Au–Sb–As-rich fluids,but the Au-and Sb-ore fluids were likely evolved at separate stages in the ore-forming system. 展开更多
关键词 Pyrite STIBNITE LA-ICP-MS and NanoSIMS Sulfur isotopes au and sb deposits Youjiang basin
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湖南沃溪W-Sb-Au矿床成因的流体包裹体证据 被引量:16
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作者 董树义 顾雪祥 +4 位作者 Oskar Schulz Franz Vavtar 刘建明 郑明华 程文斌 《地质学报》 EI CAS CSCD 北大核心 2008年第5期641-647,共7页
系统研究了沃溪W-Sb-Au矿床层状矿体的流体包裹体特征,均一温度集中在120~180℃,盐度变化于2.9%~8.9%NaCl之间,由包裹体均一温度与盐度计算得出的流体密度介于0.94~0.96g/cm^3。流体包裹体稀土元素地球化学组成表明,成矿流体为一种... 系统研究了沃溪W-Sb-Au矿床层状矿体的流体包裹体特征,均一温度集中在120~180℃,盐度变化于2.9%~8.9%NaCl之间,由包裹体均一温度与盐度计算得出的流体密度介于0.94~0.96g/cm^3。流体包裹体稀土元素地球化学组成表明,成矿流体为一种进化的海水,即海水在海底下沉积柱循环过程中萃取矿质,形成120~180℃温度的低密度成矿流体。当其回返上升到海底后,形成悬浮热液柱,并与冷海水逐渐掺和,发生化学和机械-化学沉积,在海底形成层状矿体。流体包裹体均一温度和盐度的变化范围与很多沉积喷流(SEDEX)矿床极为相似,暗示与这些矿床具有相似的成因机制。同一矿层、条带状矿石中同一条带的石英中包裹体均一温度和盐度的规律性变化,支持沃溪W-Sb-Au矿床的同生热水沉积成因观点。 展开更多
关键词 流体包裹体 悬浮热液柱 热水沉积 W-sb-au矿床 沃溪 湖南省
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湘西沃溪Au-Sb-W矿床中富放射成因锶的成矿流体及其指示意义 被引量:19
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作者 彭建堂 胡瑞忠 +1 位作者 赵军红 符亚洲 《矿物岩石地球化学通报》 CAS CSCD 2003年第3期193-196,共4页
研究表明 ,湘西沃溪Au Sb W矿床白钨矿的Sr含量很高 ,为 14 5 5~ 6 810 μg g ;87Sr/ 86 Sr为 0 .74 6 75~0 .75 0 0 3,明显不同于国外金矿中的白钨矿 ,表现出显著富放射成因锶。沃溪矿床的成矿流体为一种显著富放射成因锶的热水溶液 ... 研究表明 ,湘西沃溪Au Sb W矿床白钨矿的Sr含量很高 ,为 14 5 5~ 6 810 μg g ;87Sr/ 86 Sr为 0 .74 6 75~0 .75 0 0 3,明显不同于国外金矿中的白钨矿 ,表现出显著富放射成因锶。沃溪矿床的成矿流体为一种显著富放射成因锶的热水溶液 ,暗示成矿流体不可能是类似于现代大洋中脊喷出的热液或古海水 ,其矿床成因并非前人所认为的“海底热泉 (卤水 )沉积成因”或“海底喷流沉积成因”。矿床中这种显著富放射成因锶的成矿流体 ,很可能是热水溶液对下伏古老基底淋滤或是对元古界赋矿地层中的碎屑岩选择性优先淋滤所致。 展开更多
关键词 沃溪ausb—W矿床 成矿流体 富放射成因锶 白钨矿 金矿床 湖南 地质特征 矿床成因
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湘西沃溪W-Sb-Au矿床白钨矿Nd-Sr-Pb同位素对成矿流体的示踪 被引量:42
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作者 彭渤 Robert FREI 涂湘林 《地质学报》 EI CAS CSCD 北大核心 2006年第4期561-570,共10页
本文对湘西沃溪W-Sb-Au矿床白钨矿进行了系统的Nd—Sr—Pb同位素分析。结果表明,白钨矿的Sm、Nd含量较低,^147Sm/^144Nd(0.64~1.27)值和Sm/Nd值(1.11~2.22)变化较大,其εNd(t=199Ma)值也很低,平均为-25.5(n=9);... 本文对湘西沃溪W-Sb-Au矿床白钨矿进行了系统的Nd—Sr—Pb同位素分析。结果表明,白钨矿的Sm、Nd含量较低,^147Sm/^144Nd(0.64~1.27)值和Sm/Nd值(1.11~2.22)变化较大,其εNd(t=199Ma)值也很低,平均为-25.5(n=9);白钨矿的^87Sr/ε84Sr值(0.7476~0.7504)高,平均为0.74961(n=11),代表白钨矿形成时的初始^87Sr/^86Sr(t=199Ma)值;逐级分离Pb同位素分析结果显示白钨矿的^206Pb/^204Pb、^207Pb/^204Pb、^208Pb/^204Pb值变化范围小,平均依次分别为18.11、15.61、38.6,与含金石英脉中黄铁矿、蚀变围岩及区域板溪群板岩等的相应Pb同位素比值基本一致。白钨矿Nd—Sr—Pb同位素组成和闪锌矿等其他矿物的Sr同位素特征指示成矿流体来自:板溪群下伏成熟陆壳、深部花岗质岩浆、浅部赋矿围岩等源区。成矿流体是这些来自不同源区的流体相作用而形成的混合流体。成矿作用则是这些不同源区的流体混合作用并演化的结果。且成矿流体演化早期是来自下伏成熟陆壳的流体与来自赋矿围岩的流体混合,导致早期W成矿;晚期是来自深部花岗质岩浆的流体与浅部赋矿围岩的流体混合作用,导致晚期Sb—Au成矿。W—Sb—Au成矿则是中生代陆内碰撞造山体制下不同期次的流体演化和叠加作用的结果。 展开更多
关键词 Nd—Sr—Pb同位素示踪 白钨矿 成矿流体 W—sbau矿床 湘西沃溪
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湘中龙山Au-Sb矿床成矿物质来源——来自S、Pb和Sr同位素证据 被引量:3
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作者 蔡应雄 杨红梅 +4 位作者 邱啸飞 梅玉萍 童喜润 谭娟娟 刘重芃 《地质学报》 EI CAS CSCD 北大核心 2020年第8期2311-2324,共14页
龙山Au-Sb矿床是湘中Au、Sb矿集区的代表性矿床,本文对其不同类型矿石、矿区围岩和区域地层进行了S、Pb、Sr同位素组成对比研究。矿石中硫化物的δ34S值为-3.0‰~5.1‰,平均值2.3‰;矿区围岩的δ34S值为4.0‰~5.9‰,平均值5.2‰;区域地... 龙山Au-Sb矿床是湘中Au、Sb矿集区的代表性矿床,本文对其不同类型矿石、矿区围岩和区域地层进行了S、Pb、Sr同位素组成对比研究。矿石中硫化物的δ34S值为-3.0‰~5.1‰,平均值2.3‰;矿区围岩的δ34S值为4.0‰~5.9‰,平均值5.2‰;区域地层的δ34S值为9.3‰~13.3‰,平均值11.3‰。矿石与矿区围岩、区域地层的硫同位素组成差别较大,矿石硫具岩浆来源特征。矿石中硫化物的206Pb/204Pb、207Pb/204Pb和208Pb/204Pb比值分别为16.992~18.457、15.392~15.722和37.586~38.960,矿区围岩的206Pb/204Pb、207Pb/204Pb和208Pb/204Pb比值分别为17.630~17.993、15.522~15.644和37.981~38.366;区域地层的206Pb/204Pb、207Pb/204Pb和208Pb/204Pb比值分别为17.566~18.092、15.430~15.630和37.988~38.710。矿石铅同位素组成变化较大,矿石铅的来源较复杂,赋矿地层、印支期岩浆岩和上地幔可能都为其提供了部分铅。石英流体包裹体的(87Sr/86Sr)i比值为0.71540~0.72309,矿区围岩的(87Sr/86Sr)i比值为0.71844~0.72153,区域地层的(87Sr/86Sr)i比值为0.71792~0.71939,矿石、矿区围岩、区域地层的初始锶同位素值均较高,主要为壳源锶,部分锶来自赋矿地层,部分来自印支期岩浆岩。龙山矿床成矿物质具壳幔混合来源特征,矿化剂硫主要来源于岩浆,成矿物质部分来自江口组地层,部分来自印支期岩浆岩。 展开更多
关键词 S同位素 PB同位素 SR同位素 成矿物质来源 湘中龙山
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Sb在Au单晶电极上结构敏感吸附行为的比较 被引量:1
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作者 颜佳伟 商旺火 +1 位作者 吴琼 毛秉伟 《电化学》 CAS CSCD 北大核心 2005年第2期140-145,共6页
本文研究比较Sb(III)在Au(111)和Au(100)电极上的不可逆吸附与还原和Sb的欠电位沉积行为及其相互影响.现场扫描隧道显微镜和循环伏安法测试结果表明,基底表面结构不仅影响阴离子的吸附行为和Sb的吸附结构,而且还影响其自身结构的稳定性.... 本文研究比较Sb(III)在Au(111)和Au(100)电极上的不可逆吸附与还原和Sb的欠电位沉积行为及其相互影响.现场扫描隧道显微镜和循环伏安法测试结果表明,基底表面结构不仅影响阴离子的吸附行为和Sb的吸附结构,而且还影响其自身结构的稳定性.在Au(111)表面,致密无序膜的SbO+不可逆吸附层还原后基本保持原有的无序结构;而在Au(100)表面,由于SO42-的共吸附,不可逆吸附物种还原后形成(2×2)有序结构.在Au(111)表面上,Sb的欠电位沉积伴随显著的合金化,且因表面有序结构的破坏而形成沟道状二维结构;但对Au(100)表面,由于其晶格和尺寸与稳定的AuSb2合金之(100)面有较好的匹配性,使Au与Sb得以形成有序的表面化合物,从而避免了欠电位沉积过程中的表面合金化问题,进一步体现基底结构的敏感性和重要性. 展开更多
关键词 吸附行为 电极 au 扫描隧道显微镜 单晶 SO4^2- 有序结构 循环伏安法 不可逆吸附 sb(Ⅲ) 欠电位沉积 表面合金化 相互影响 沉积行为 吸附结构 表面结构 无序结构 吸附物种 二维结构 沉积过程 基底结构 还原 阴离子 稳定性
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湘西沃溪钨锑金矿床黄铁矿中发现Au-Sb矿物相 被引量:3
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作者 彭渤 Adam Piestrzynski +1 位作者 刘升友 Jadwiga Pieczonka 《地质通报》 CAS CSCD 北大核心 2007年第5期553-559,共7页
利用扫描电镜和电子探针等方法,对沃溪钨锑金矿床中产于(块状白钨矿-石英脉中的)黄铁矿微裂隙中的自然金和Au-Sb矿物相进行了较详细的观察和研究。结果表明,黄铁矿中Au-Sb矿物相除了有前人已经鉴定出的方锑金矿(AuSb2.13)外,还新发现有... 利用扫描电镜和电子探针等方法,对沃溪钨锑金矿床中产于(块状白钨矿-石英脉中的)黄铁矿微裂隙中的自然金和Au-Sb矿物相进行了较详细的观察和研究。结果表明,黄铁矿中Au-Sb矿物相除了有前人已经鉴定出的方锑金矿(AuSb2.13)外,还新发现有锑金矿(Au1.02Sb)矿物相。二者以显微颗粒的形式存在于黄铁矿显微裂隙中。黄铁矿微裂隙中Au-Sb矿物相的存在,指示矿床成矿在黄铁矿形成之后存在Au-Sb混溶的成矿流体。自然金、方锑金矿、锑金矿等矿物的沉淀析出可能是Au-Sb混溶流体从高温(高于350℃)向低温(250℃)演变的结果。此外,Au-Sb矿物相的发现对改进矿石冶炼中Au、Sb的分离技术有参考价值。 展开更多
关键词 ausb矿物相 方锑金矿 锑金矿 钨锑金矿床 湘西沃溪
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黔东南地区Au,Sb,Pb,Zn矿床分布与重力场关系的初步分析 被引量:8
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作者 王亮 《贵州地质》 2004年第2期76-80,共5页
本文根据 1 /2 0万区域重力资料所圈定的异常及其对深部构造的初步解译等 ,结合该区Au ,Sb ,Pb ,Zn等矿床的空间分布 ,初步探讨其与区域重力场等的关系 ,对黔东南地区上述矿床的研究和找矿有一定的参考价值。
关键词 区域重力场 深部断裂 au sb Pb zn矿床 黔东南
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湖南沃溪Au-Sb-W矿床中黑钨矿族矿物特征及其对矿床成因的指示 被引量:2
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作者 陈爱清 唐攀科 +1 位作者 李国武 邢万里 《高校地质学报》 CAS CSCD 北大核心 2014年第2期213-221,共9页
通过对湖南沃溪Au-Sb-W矿床鱼儿山-红岩溪矿段中黑钨矿族矿物的野外观察表明,含黑钨矿族矿物的矿石主要呈条带状、细脉状,次为浸染状构造,结构上主要为半自形-它形板状和柱状;X射线粉晶衍射结果得出其物相为钨铁矿,晶胞参数为a0:4... 通过对湖南沃溪Au-Sb-W矿床鱼儿山-红岩溪矿段中黑钨矿族矿物的野外观察表明,含黑钨矿族矿物的矿石主要呈条带状、细脉状,次为浸染状构造,结构上主要为半自形-它形板状和柱状;X射线粉晶衍射结果得出其物相为钨铁矿,晶胞参数为a0:4.7454 A ,b0:5.7160A ,c0:4.9753 A ,β:90°13′;电子探针分析结果显示,MnO含量范围0.97%-11%,FeO含量范围13.65%-23.36%,WO3含量范围71.39%-76.87%,既有高MnO含量亦有低MnO含量的钨铁矿,成连续性变化,并从深部中段向浅部中段,MnO含量具有增大趋势。计算其晶体化学式为(Fe0.57-1.02Mn0.46-0.04)W0.98-1.00O4。相关分析得出FeO与MnO相关系数为-0.98,WO3与MnO相关系数为0.47,WO3与FeO相关系数为-4.10。黑钨矿族矿物中Nb和Ta的含量较低,暗示了沃溪Au-Sb-W矿床可能为沉积-改造热液成因。 展开更多
关键词 沃溪au-sb-W矿床 钨铁矿 黑钨矿族 矿床成因
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藏南喜马拉雅造山带造山型马扎拉Au-Sb矿床和沙拉岗Sb矿床流体包裹体He-Ar同位素组成:对成矿流体来源的制约 被引量:11
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作者 翟伟 郑思琦 +5 位作者 孙晓明 韦慧晓 莫儒伟 张凌宇 周峰 易建洲 《岩石学报》 SCIE EI CAS CSCD 北大核心 2018年第12期3525-3538,共14页
马扎拉Au-Sb矿床和沙拉岗Sb矿床是藏南金锑成矿带中典型的造山型矿床。马扎拉Au-Sb矿床中矿体以含金辉锑矿石英脉的形式产于下中侏罗统陆热组地层中,主要组成矿物有自然金、辉锑矿、石英和碳酸盐矿物;沙拉岗Sb矿床中矿体主要以辉锑矿石... 马扎拉Au-Sb矿床和沙拉岗Sb矿床是藏南金锑成矿带中典型的造山型矿床。马扎拉Au-Sb矿床中矿体以含金辉锑矿石英脉的形式产于下中侏罗统陆热组地层中,主要组成矿物有自然金、辉锑矿、石英和碳酸盐矿物;沙拉岗Sb矿床中矿体主要以辉锑矿石英脉的形式产于下白垩统多久组地层和辉长岩体中,主要组成矿物为辉锑矿、辰砂、锑华、石英和少量碳酸盐矿物。在两个矿床的矿脉石英和辉锑矿中均发现有三类原生和假次生包裹体:水溶液包裹体、CO2-水溶液包裹体和有机包裹体。流体包裹体显微测温结果显示:马扎拉Au-Sb矿床的成矿温度为160~280℃,沙拉岗Sb矿床的成矿温度为140~240℃。He-Ar同位素分析显示马扎拉Au-Sb矿辉锑矿石英脉矿石中辉锑矿和石英以及赋矿地层中沉积层状硫化物中黄铁矿的流体包裹体均具有低的3He/4He比值,分别为0. 01382~0. 05642Ra和0. 03353~0. 08744Ra,40Ar/36Ar比值具有比较大的变化范围,分别为346. 8~4770. 1和349. 4~2689. 1;沙拉岗Sb矿床中辉锑矿样品的3He/4He比值为0. 02385~0. 11488Ra,40Ar/36Ar比值变化小,为300. 6~537. 5。与藏南Au-Sb成矿带中造山型Au矿床成矿流体中含一定量的幔源挥发份相对比,马扎拉AuSb矿床和沙拉岗Sb矿床成矿流体中均无幔源流体的参与,马扎拉Au-Sb矿床成矿流体为壳源变质流体与改造型饱和大气水形成的混合流体;沙拉岗Sb矿床成矿流体以改造型饱和大气水为主,并有壳源变质流体的加入。 展开更多
关键词 造山型au-sb矿床 HE-AR同位素 幔源流体 变质流体 改造型饱和大气水
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Characteristics of Pegmatite-Related Fluids and Significance to Ore-Forming Processes in the Zhaxikang Pb-Zn-Sb Polymetallic Deposit,Tibet,China 被引量:6
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作者 XIE Yuling WANG Bogong +4 位作者 LI Yingxu LI Guangming DONG Suiliang GUO Xiang WANG Lei 《Acta Geologica Sinica(English Edition)》 SCIE CAS CSCD 2015年第3期811-821,共11页
The Zhaxikang Pb-Zn-Sb polymetallic deposit is one of the most important deposits in the newly recognized southern Tibet antimony-gold metallogenic belt.Compared to the porphyry deposits in the Gangdese belt,much less... The Zhaxikang Pb-Zn-Sb polymetallic deposit is one of the most important deposits in the newly recognized southern Tibet antimony-gold metallogenic belt.Compared to the porphyry deposits in the Gangdese belt,much less researches have addressed these deposits,and the genesis of the Zhaxikang deposit is still controversial.Based on field investigation,petrographic,microthermometric,Laser Raman Microprobe(LRM) and SEM/EDS analyses of fluid,melt-fluid,melt and solid inclusions in quartz and beryl from pegmatite,this paper documents the characteristics and the evolution of primary magmatic fluid which was genetically related to greisenization,pegmatitization,and silification in the area.The results show that the primary magmatic fluids were derived from unmixing between melt and fluid and underwent a phase separation process soon after the exsolution.The primary magmatic fluids are of low salinity,high temperature,and can be approximated by the H_2O-NaCl-CO_2 system.The presence of Mn-Fe carbonate in melt-fluid inclusions and a Zn-bearing mineral(gahnite) trapped in beryl and in inclusions from pegmatite indicates high Mn,Fe,and Zn concentrations in the parent magma and magmatic fluids,and implies a genetic link between pegmatite and Pb-Zn-Sb mineralization.High B and F concentrations in the parent magma largely lower the solidus of the magma and lead to late fluid exsolution,thus the primary magmatic fluids related to pegmatite have much lower temperature than those in most porphyry systems.Boiling of the primary magmatic fluids leads to high-salinity and high-temperature fluids which have high capacity to transport Pb,Zn and Sb.The decrease in temperature and mixing with fluids from other sources may have caused the precipitation of Pb-Zn-Sn(Au) minerals in the distal fault systems surrounding the causative intrusion. 展开更多
关键词 Zhaxikang Pb-Zn-sb deposit South Tibte sb-au metallogenic belt fluid inclusion pegmatite ore-forming process
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