山西刁泉铜矿地质特征有矿床成因

刁泉矿床为产大在理岩和花岗斑岩接触带中的大型Ａｇ－Ｃｕ矿床。成矿作用分为两期，具有强的围岩蚀变。岩石和硫化物的向量元素、地球化学特征表明；成矿流体为内生热液。稳定同位素研究表明：＾３４Ｓ明显富集，均为正值，塔式效应明显，矿石铅和黑云母石英二长岩的铅同位素具有相似和相对稳定的组成，二者可能从下地壳产生的。碳、氧同位素组成显示了岩浆热液的特征。包裹体测温给出了１８４－４００℃的成矿温度；含盐度为４０－     

晋北火山岩型金银矿床同位素地球化学特征

晋北地区是浅成低温热液金银矿床重要分布区。金银矿床与火山岩岩体密切相关。与成矿有关的石英斑岩、石岗斑岩基 Rb-Sr等时线年龄为136-167Ma，为燕山早中期产物，（87Sr/86Sr）。为0.7058-0.7065，属幔壳混源型。铅同位素资料表明，支家地银矿和刁泉银、金、铜矿铅同位素组成与高于庄组白云岩及有关次山岩岩石铅组成相似，可能均属壳幔混合源。耿庄金矿铅同位素属异常铅。金银矿床的δ34S值分布范围为-0.8‰-+9.6‰,算术平均值为3.8‰，为岩浆热液型特征。成矿流体氢氧同位素及碳酸盐的碳氧同     

浙江建德块状硫化物矿床地球化学特征及其成因意义

浙江建德块状硫化物矿床，以Ｃｕ〉Ｚｎ〉Ｐｂ为特征。鉴于Ｃｕ，Ｐｂ和Ｚｎ三元素的地球化学行为和海底喷流作用的固有特性。它们在横向上和纵向上均具独特的分带性，显示出顺结构，对黄铁矿中特征元素比值，成矿温度以及铅同位素组成等方面的研究表明，该矿床乃同生沉积作用的产物，而非岩浆热液成矿。     

延边地区火山岩型金矿地球化学及成矿作用研究

延边地区北部大面积出露中生界（Ｊｓ）火山岩系，为正常的钙碱性系列，同玄武岩－安山岩－石英安山岩组成，以富含Ａｕ，Ａｇ，Ｓｂ，Ａｓ，Ｂｉ为特征，其中的金矿床可分为两类即蚀地型高温热液矿床和浅成中低温线热液成矿，同位素资料表明，其成矿热液主要来自火山岩浆。     

江西银山Cu─Au多金属矿床成矿作用的新认识及其找矿意义

本文根据银山矿床成矿特征及其与邻区矿床的对比，论证了在该矿新发现的一种成矿作用──构造动力热液成矿作用；提出矿床的火山－岩浆热液成矿作用与石英斑岩岩浆阶段关系更为密切，形成内带为斑岩型Ｃｕ－Ａｕ矿体和外带为脉型Ｃｕ（Ａｕ）、ＣｕＰｂＺｎ、ＰｂＺｎＡｇ矿体的成矿系列。根据这两种成矿作用的时空关系，指出银山矿床是构造动力作用热液与火山－岩浆热液双重耦合成矿作用的产物，这一新的认识对指导找矿具有重要意义。     

毛洋头铀（银,钼）矿床同位素地球化学研究

毛洋头铀矿床的（Ｈ、Ｏ）同位素特征表明：早期矿化热液主要为岩浆水，而晚期矿化热液则主要为大气降水。铅同位素组成反映该矿床中铅为不同来源的混合铅。Ｃ、Ｓ同位素组成变化范围小，且与火成岩的Ｃ、Ｓ同位素组成相当，说明矿床中的碳和硫主要淋取于火成围岩或源于地壳深部。     

贱金属硫化物矿床中的贵金属

本文从现代海底热液成矿系统和古代块状硫化物矿床中都含有大量的贵金属这一事实出发，论证了贱金属硫化物矿床中贵金属的重要性，并论述了Ａｕ，Ａｇ在矿物、矿石、矿体及矿床类型中的分布特征及其Ｃｕ－Ａｕ共生、Ｐｂ（Ｚｎ）－Ａｇ共生相合对于矿床地质和找矿的意义。     

五台山—恒山绿岩带Au-Ag-Cu成矿作用地球化学特征

五台山—恒山绿岩带Ａｕ、Ａｇ、Ｃｕ矿床可分为二大类型：（１）再生型金银铜矿，产在包括岩浆岩在内的各类岩石断裂构造中，与岩浆期后热液有关；（２）变生型金银铜矿，产于各类变质岩中，具有层控特征（即绿岩型金矿）。在地球化学特征上，再生型矿床与变生型矿床相比，矿体及围岩中Ｍｏ、Ａｇ、Ｐｂ、Ｚｎ、Ｃｄ等成矿及伴生元素明显富集；Ｋ２Ｏ、Ｒｂ、Ｓｒ、Ｂａ、Ｔｈ、Ｕ也明显富集，是后期岩浆热液作用的结果；Ｈｇ、Ｆ的明显富集则与后期构造活动有关；Ｚｎ／Ｃｄ比值较低，说明受到后期岩浆侵入影响；Ｔｈ／Ｕ比值低，可能指示富钙的酸性岩环境。再生型Ａｕ矿化的元素组合为Ｃｄ、Ａｓ、Ｎｉ、Ａｇ、Ｓｂ、Ａｕ、Ｈｇ（Ｂｉ），再生型Ａｇ矿化的元素组合为Ａｓ、Ｓｂ、Ａｇ、Ｃｄ、Ｃｕ、Ｎｉ（Ｍｏ、Ｐｂ、Ｚｎ、Ｂｉ），变生型Ａｕ矿化的元素组合较简单，只为Ａｕ、Ｈｇ、Ａｓ或Ａｕ、Ｃｕ。上述地球化学特征不仅可以有效地区分矿化类型，而且可以作为地球化学找矿和评价的指标     

云南澜沧铅锌银铜矿床稳定同位素地球化学研究

澜沧铅锌银铜多金属硫化物矿床产于石炭系火山岩和碳酸盐岩中。矿床硫同位素研究表明硫具胡来自下地壳或上地幔的特征。据铅构造模式认为矿石铅为上地壳铅和地幔铅的混合物，具有多来源的特点。矿物及其包裹体的氢、氧同位素组成反映出成矿溶液早期以岩浆水为主，稍晚有大气降水混入。脉石矿物主方解石的碳同位素组成表明成矿过程中热液同围岩进行了广泛的物质成份交换。为与燕山期次火山活动有关的热液矿床。     

四川石棉碲矿床地球化学特征研究

研究了世界首例碲矿床的地球化学特征，特别是微量分散元素碲富集成矿的地球化学条件。此矿床属Ｔｅ－Ｂｉ－Ａｕ－Ａｇ组合型中温热液矿床，矿体为碳酸盐脉和磁黄铁矿脉，矿石平均品位：Ｔｅ５．９８％、Ｂｉ８．０２％、Ａｕ９．７３×１０－６、Ａｇ３７．４５×１０－６。成矿元素Ｔｅ、Ａｕ、Ａｇ主要来源于深部富含ＣＯ２、Ｓ的热流体。此热流体沿深大断裂上升至地壳浅部时，从围岩中浸取了大量的成矿元素Ｂｉ、Ｆｅ等。热液中的硫优先与铁结合生成磁黄铁矿析出，降低了热液中的硫浓度，从而促使分散元素碲与其沉淀剂Ｂｉ、Ａｇ、Ａｕ相结合呈碲铋矿物、碲银矿和碲金矿等独立矿物形式沉淀，并富集成矿。     

河北牛圈热泉型银(金)矿床成因

牛圈银(金)矿床是冀北地区近几年来新发现的重要银矿床之一.本文从硅质角砾岩成因、成矿的阶段划分、成矿物理化学条件、矿物包裹体等方面入手探讨了该矿床成因并提出了成矿模式.该矿床成矿温度稍高(220-350℃),成矿压力很低(小于260×10⁵Pa),形成深度为0.42-0.86km的亚地表环境,成矿流体以低盐度(小于3.35wt%NaCl),富K⁺、Cl^-、F^-、SO₄^2-,贫Na⁺、Ca²⁺,以大气水为主为特征,属典型的热泉型矿床.     

Hydrothermal Fluid Sources of the Fengjia Barite–fluorite Deposit in Southeast Sichuan,China: Evidence from Fluid Inclusions and Hydrogen and Oxygen Isotopes

The Fengjia barite–fluorite deposit in southeast Sichuan is a stratabound ore deposit which occurs mainly in Lower Ordovician carbonate rocks. Here we present results from fluid inclusion and oxygen and hydrogen isotope studies to determine the nature and origin of the hydrothermal fluids that generated the deposit. The temperature of the ore‐forming fluid shows a range of 86 to 302 °C. Our detailed microthermometric data show that the temperature during mineralization of the fluorite and barite in the early ore‐forming stage was higher than that during the formation of the calcite in the late ore‐forming stage. The salinity varied substantially from 0.18% to 21.19% NaCl eqv., whereas the density was around 1.00 g/cm³. The fluid composition was mainly H₂O (>91.33%), followed by CO₂, CH₄ and traces of C₂H₆, CO, Ar, and H₂S. The dominant cation was Na⁺ and the dominant anion Cl^‐, followed by Ca²⁺, SO₄^2‐, K⁺, and Mg²⁺, indicating a mid–low‐temperature, mid‐low‐salinity, low‐density NaCl–H₂O system. Our results demonstrate that the temperature decreased during the ore‐forming process and the fluid system changed from a closed reducing environment to an open oxidizing environment. The hydrogen and oxygen isotope data demonstrate that the hydrothermal fluids in the study area had multiple sources, primarily formation water, as well as meteoric water and metamorphic water. Combined with the geological setting and mineralization features we infer that the stratabound barite–fluorite deposits originated from mid–low‐temperature hydrothermal fluids and formed vein filling in the fault zone.     

浙江八面山特大型萤石矿床的沉积成矿特征

八面山萤石矿床是近年来发现的特大型萤石矿床,通过成矿地质背景,矿体与矿石特征,容矿岩系岩石化学组成特征,岩石与矿石稀土元素特征,钐—钕同位素特征等研究,探讨了矿床的沉积成矿特点。结果充分说明,八面山萤石矿床是一个以沉积为主,后经热液改造的特大型萤石矿床。依据上述分析数据,同时结合容矿围岩和矿体的地质特征,可以推测, 八面山萤石矿床是寒武系沉积岩作为矿源层,为萤石矿床的形成提供了必要的物源。后期岩浆作用只是对部分矿体进行了不同程度的改造,局部形成了构造带中的陡倾斜脉状矿体。     

闽北大坪萤石矿构造蚀变、岩石地球化学特征与矿床成因探讨

为了探讨闽北大坪萤石矿构造蚀变带特征及萤石矿成因,对大坪萤石矿构造蚀变带内各岩性的主量元素、稀土元素、微量元素特征进行了分析。研究结果表明,大坪萤石矿受构造控制,蚀变主要有绢云母化、硅化、萤石矿化,萤石矿化带具有稀土元素总量低、重稀土元素富集、高CaO、F等特征。根据萤石矿矿石构造及其蚀变特征,认为大坪萤石矿至少包括3个成矿期次,属于岩浆期后中低温热液充填型矿床。     

福建浦城龙堂寺萤石矿地质特征及成因探讨

龙堂寺萤石矿体贮存于断裂带中,通过对成矿地质条件、矿体特征,矿物成分、矿石结构、构造等研究分析,认为该矿属低温热液充填型脉状萤石矿床。     

Nature and Genesis of the Xiaobeigou Fluorite Deposit,Inner Mongolia,Northeast China: Evidence from Fluid Inclusions and Stable Isotopes

The recently discovered Xiaobeigou fluorite deposit is situated in the southern part of the Southern Great Xing'an Range metallogenic belt. Fluorite‐bearing veins are rather common over the whole area. So far, 11 mineralized veins have been delineated at the Xiaobeigou deposit. Orebodies of the deposit are mainly hosted in Permian and Jurassic volcano‐sedimentary rocks. The orebodies in this mining district exhibit a well‐developed vertical zonation: from top to bottom, the orebodies can be divided into upper, central, and lower zones. The central zone is the most important part for mining operations, and it shows lateral zonation of fluorite mineralization. Rare earth element (REE) contents of the investigated samples are relatively low (less than 30.2 ppm). Furthermore, the REE contents of the fluorite grains from early to late ore stages exhibit a decreasing trend. All the fluorite samples show no or slightly positive Eu anomalies. Three types of fluid inclusions (FIs) are distinguished in the quartz and fluorite samples, including pure‐liquid single‐phase (PL‐type), liquid‐rich two‐phase (L‐Type), and vapor‐rich two‐phase (V‐type) FIs. The FIs hosted in early‐stage quartz were homogenized at 159.5–260.7°C (mainly 160–240°C); their salinities range from 0.18 to 1.22 wt.% NaCl eqv. The FIs hosted in early‐stage fluorite yield slightly lower homogenization temperatures of 144.4–266.8°C (peaking at 140–220°C), which correspond to salinities of 0.18–0.88 wt.% NaCl eqv. Homogenization temperatures and salinities for the late stage are 132.5–245.8°C (mainly 160–180°C) and 0.18–1.40 wt.% NaCl eqv., respectively. Laser Raman spectroscopy of FIs shows that both the vapor and liquid compositions of the inclusions are dominated by H₂O. The H–O isotopic compositions at Xiaobeigou suggest that the ore‐forming fluids are predominantly of meteoric water origin. The Xiaobeigou deposit can be classified as a typical low‐temperature hydrothermal vein‐type fluorite deposit. Combined with regional data, we infer that the fluorite mineralization occurred during the Late Mesozoic in an extensional setting.     

Geochemical Characteristics of Gold Polymetallic Deposits as Exemplified by the Laozuoshan Deposit,Heilong jiang,China

From the studies of ore deposit geologic settings,sulfur isotopes,lead isotopes,carbon isotopes and oxygen isotopes,fluid inclusions and petrochemistry in this paper,the authors have drawn a conclusion that the ore-forming hydrothermal solutions are the high-temperature magmatic hydrothermal solutions for the gold ore deposit,and at the same time,the involvemety of crustal materials can not be ruled out .It is the first time that the authors have proposed that the Laozuoshan gold-ploymetallic ore deposit in Heilongjiang Province was formed in the calc-alkaline series environment at the margin of an active continent.     

论治岭头金银矿床的成因

治岭头金银矿床矿体为含冰长石、蔷薇辉石的玉髓状石英脉体,矿石具环带状构造,围岩蚀变具典型的浅成低温热液蚀变特征,成矿流体是一种低盐度、近中性的还原性流体.矿床硫、铅、氢、氧、碳同位素研究表明,成矿物质主要来源于地下深部（甚至上地幔）,成矿热液表现出低温热液演化特点.成矿作用与加里东晚期浅成岩浆侵入活动有内在的成因联系.治岭头金银矿床属浅成低温热液（次火山热液）型金银矿床     

西藏邦铺钼多金属矿床矽卡岩矿物学特征及其地质意义

西藏邦铺超大型钼多金属矿床中矽卡岩铅锌矿体赋存于下二叠统洛巴堆组矽卡岩和大理岩中,矿体呈似层状、透镜状产出,矽卡岩矿物较为发育。为进一步查明矿床矽卡岩矿物种属及矽卡岩类型,剖析矽卡岩形成环境及其与矿化类型之间的关系,基于对矽卡岩矿物系统地显微镜下观测,利用电子探针对矿床主要矽卡岩矿物化学成分进行了系统分析。结果表明,石榴子石端员组分以钙铁榴石为主,含少量锰铝榴石和钙铝榴石;单斜辉石主要为透辉石-钙铁辉石系列,含少量锰钙辉石;似辉石为铁钙蔷薇辉石;角闪石主要为钙质阳起石;绿帘石贫Fe、Mg。矽卡岩矿物组合特征表明,矿床矽卡岩兼具钙矽卡岩和锰质矽卡岩特征;早期矽卡岩形成于较强的氧化环境,成矿岩浆流体亦具有较高氧逸度。邦铺首次发现锰质矽卡岩矿物组合,表明矿区具有银矿找矿潜力,为下一步找矿工作提供了理论支撑。     

萤石矿自然重砂矿物组合规律及其找矿意义

为探究不同类型的萤石矿所反映的自然重砂矿物组合所携带的对各类型萤石矿的指示特征,统计了浙江、湖南、湖北、青海、广西、福建、安徽、新疆、甘肃、河北共计10个地区23个典型萤石矿床的自然重砂矿物报出情况,计算各重砂矿物报出率,分析得出热液型矿、后期热液型及热液充填型3种类型萤石矿床各自对应的自然重砂矿物组合和标型矿物组合。结果显示,各类型矿床自然重砂矿物组合既有相同之处也有显示各自的特点。因此,按照矿床类型建立的自然重砂矿物组合及其含量变化,对于新一轮的矿产资源勘查具有重要的意义。