江西银山金,铜多金属矿床构造动力—火山岩浆同步一体成矿热结构 …

银山金铜多金属矿床位于赣东北深断裂的北西侧。矿区大面积出露前震旦系双桥山群浅变质岩,其上有零星不整合产出的上株罗统鹅湖岭组火山碎屑岩－熔岩。矿区褶皱构造主体为双桥山群浅变质岩构成的银山背斜,沿背斜轴部发育一条斜贯全区的剪切带。区内主要发育燕山早期的火山碎屑岩、熔岩、次火山岩及隐爆角砂岩。大量事实表明,该矿床经历了构造动力热液成矿和火山－岩浆热液成矿,两种成矿作用在时间上具同期性,在空间上两者密切相     

构造动力-火山岩浆同步一体成矿机制——以江西银山金铜多金属矿床为例

银山多金属矿床的形成经历了构造动力热液成矿及火山-岩浆热液成矿两个阶段。构造动力热液成矿奠定了银山矿床矿化的基本格局,火山-岩浆热液成矿作用叠加其上,形成了银山大型或特大型金铜多金属矿床。大量事实表明,两种成矿作用在时间上具同期性,构造动力热液成矿稍早些。在空间和成因上两者密切相关,它们构成了构造动力-火山岩浆同步一体的成矿体系。     

构造动力—火山岩浆同步一体成矿机制：以江西银…

银山多金属矿床的形成经历了构造动力热液成矿及火山－岩浆热液成矿两个阶段，构造动力热液成矿奠定了银山矿床矿化的基本格局，火山－岩浆热液成矿作用叠加其上，形成了银山大型或特大型金铜多金属矿床，大量事实表明，两种成矿作用在时间上具同期性，构造动力热液成矿稍早些，在空间和成因上两者密切相关，它们构成了构造动力－火山岩浆同步一体的成矿体系。     

江西银山铜铅锌矿床成矿特征

本文主要从控矿构造和矿化分带两个侧面,探讨银山铜铅锌矿床的成矿特征,以期指导矿山生产,提出找矿方向。矿区地质概况矿区位于中生代德乐火山盆地的东北缘、赣东北深大断裂的西侧。北东向的银山倾伏背斜—断裂带(以下简称轴部构造)纵贯全区,控制了本区火成岩的侵入、喷发、喷溢、爆破及成矿。震旦亚界双桥山群浅变质岩系广布全区,由绢云母千枚岩与砂岩千枚岩互层组成,片理发育,走向北东东—北东(与层理一致)(图1)。侏罗系上统鹅湖岭组下部的火山岩系沿轴部构造分布,     

赣北大湖塘钨铜多金属矿集区特征与成矿作用模式

大湖塘矿集区地处扬子陆块—下扬子地块东南缘,钦杭(钦州—杭州)复合造山带中段北侧。区内出露基岩大多数为晋宁期黑云母花岗闪长岩(九岭岩基主体部分),少数为新元古界双桥山群浅变质细碎屑岩(九岭岩基残余顶盖)以及燕山期斑状花岗岩、细粒花岗岩和花岗斑岩。本文在综合研究区域地质、矿床地质成果基础上,分析了该区燕山期构造—岩浆的活动规律,厘定了成矿岩体;运用构造解析的原理分析了该区燕山期构造—岩浆—成矿之间的关系,构建了燕山期构造—岩浆热液成矿作用模式。认为该区特大型钨铜多金属矿的形成与燕山期构造-岩浆热液成矿系统的发生、发展、演化具有密切的成生联系,其中成矿构造与成矿结构面是成矿作用的基础,成矿岩体是成矿作用的关键。成矿是成矿岩体与成矿构造、成矿结构面三位耦合的结果。     

斑岩铜矿-浅成低温热液银铅锌一远接触带热液金矿矿床模型：一个新的矿床模型——以德兴地区为例

在前人研究的基础上,通过系统的野外考察,论证了位于赣东北德兴地区德乐中生代火山盆地中的德兴铜矿、银山银铜铅锌矿和金山金矿及蛤蟆石金矿属于同一成矿系统。德兴铜矿是典型的斑岩铜矿,成矿流体和金属元素主要来自岩浆;银山银铜铅锌矿是一个下部为斑岩铜矿、上部为浅成低温热液型银铅锌矿,成矿流体早期以岩浆为主,晚期有较多的大气降水参与,成矿物质主要来自岩浆;金山和蛤蟆石金矿是远接触带热液矿床,成矿流体为岩浆热液与大气降水的混合产物,金主要来自围岩——双桥山群浅变质岩。这3套矿床以中酸性花岗斑岩或石英斑岩（高钾钙碱质花岗岩）为核心具有明显的分带性,自中心向外或深部向浅部为：斑岩铜金钼矿、浅成低温热液型银铅锌矿和远接触带热液型金矿。这种矿床组合关系不同于已知的经典斑岩铜矿模型和斑岩铜矿一浅成低温热液金银矿床模型,因而,有必要提出一个新的模型：斑岩铜矿一浅成低温热液银铅锌矿一远接触带热液金矿模型。这套矿『末形成于中侏罗世,抑或是古太平洋俯冲板片局部重熔或撕裂重熔的产物,抑或是在活动大陆边缘岩浆弧后伸展带由地幔底侵的结果。     

江西银山金铜多金属矿床构造动力热液与火山岩浆热液双重藕合成矿作用

该文根据江西银山金铜多金属矿床特征及与邻区矿床的对比，论证了构造动力热液成矿作用在银山矿床形成过程中的意义；提出了矿区火山岩浆热液成矿作用的新认识，即：火山岩浆热液成矿与石英斑岩岩浆演化阶段关系更为密切，矿化与深部大斑岩体有关，形成内带斑岩型Ａｕ、Ｃｕ矿，外带脉型Ａｕ，Ｃｕ，Ｐｂ，Ｚｎ，Ａｇ矿的成矿系列。根据两种成矿作用之间相互时空关系，作者认为银山矿床是构造动力热液与火山乐热液双重藕合成矿的产物     

关于银山矿床成矿作用的几个问题——兼与《江西银山铜铅锌金银矿床》的作者商榷

银山多金属矿床是一个特大型火山—潜火山热液矿床,具有复杂的多期多阶段的成矿作用和有序的成矿分带。成矿作用主要为火山—潜火山热液作用,但在此之前,还经历了一期由韧脆性剪切带形成而引起的动力变质热液作用。根据矿体与3个旋回潜火山岩体的时空关系,火山—潜火山热液成矿作用又可分为两个成矿期和5个成矿阶段。矿床地质地球化学研究表明成矿作用在空间上具有定向迁移的特点,结合流体动力学计算机数值模拟认为定向迁移的根本原因是构造岩浆脉动和隐伏岩体形态产状。笔者认为,矿区深部可能有隐伏岩体,但对隐伏的斑岩铜矿床不应抱很大希望     

江西省银山斑岩型铜铅锌(银)矿床成矿模式探讨

<正>银山斑岩型铜铅锌(银)矿床位于萍乡―钱塘拗陷带、万年隆起亚带,赣东北深大断裂上盘。区内地质构造复杂,火成活动频繁,成矿条件相当有利,已探明多个大型以上金属矿床,为我国有色金属和贵金属高度集中区之一。1成矿地质背景1.1地层矿区地层主要由基底中元古界双桥山群浅变质岩系和盖层中生界上侏罗统鹅湖岭组火山     

云南景洪曼养火山岩型铁矿成矿规律

曼养铁矿赋存于古近系基性偏碱性火山碎屑岩中.受火山机构控制,喷溢中基性熔岩含铁,构成铁矿原始矿源层.火山期后及构造热液叠加改造进一步富集成矿,属火山喷流沉积岩浆活动+后期气液改造有关的铁多金属矿床.     

Porphyry Cu–Au–Mo–epithermal Ag–Pb–Zn–distal hydrothermal Au deposits in the Dexing area, Jiangxi province, East China—A linked ore system

Based on previous studies and detailed field investigations of the Dexing porphyry copper deposit, the Yinshan Ag-Pb-Zn deposit and the Jinshan shear zone – hosted gold deposit in the Dele Jurassic volcanic basin, in the northeastern Jiangxi province, East China, we propose that the three deposits share spatial, temporal and genetic relationships and belong to the same metallogenic system. Dexing is a typical porphyry Cu–Au–Mo deposit in which both ore-forming fluid and metals are derived from the granite porphyry. The Yinshan deposit consists of a porphyry copper ore located in the cupola of a quartz porphyry stock, in the lower part, and Ag–Pb–Zn ore veins in the upper part. The hydrothermal fluids were mainly derived from the magma in the early stages of the mineralizing event and became mixed with meteoric waters in the late stages. Its ore metals are magma-derived. Both the Jinshan base metal veins and the Hamashi, Dongjie and Naikeng quartz vein-type gold deposit are hosted by brittle–ductile structures, which are distal in relation to the porphyry intrusions and were formed by mixed magmatic fluids and meteoric water, whereas the gold was mainly leached from the country rocks (Mesoproterozoic Shuangqiaoshan Group phyllite and schist). The deposits show a distinct spatial arrangement from porphyry Cu, to epithermal Ag–Pb–Zn and distal Au. We suggest a porphyry–epithermal–distal vein ore system model for this group of genetically related mineral deposits. They were formed in a back-arc setting in a Middle Jurassic active continental margin, with magmas derived from the subducted slab.     

亦论韧性剪切变形与金的成矿作用——与邵世才《试论韧性剪切变形与金的成矿》一文的讨论

剪切带型金矿是一种重要的金矿类型.韧性-超韧性深层次剪切变形是促使Au元素活化分异、形成动力变质含金热液的过程,中浅层次的韧脆性、脆性剪切变形区是Au元素聚集成矿部位.韧脆性剪切带的不同变形层次及其构造岩类型决定了剪切带型金矿床的矿化类型.剪切带型金矿床往往具有成矿时代滞后、空间规模差异、物源指示差异、韧性变形强度与Au元素含量反相关等异常特征.长期演化的造山带附近及边缘是寻找大型剪切带型金矿床的有利地区.     

江西银山外围地层中金的地球化学降低场及其成矿意义

通过对江西银山矿区外围２２５ｋｍ＾２范围内２１３个双桥山群地层样品的金含量分析，获得了明显的围绕矿区展布的金地球化学降低及其含量梯度变化，从而证实双桥山群为银山矿床的金矿化提供了成矿物质。作者根据这一降低场的性质，对银山的蚀变矿化特征、ＮＥ向断裂构造的控矿作用以及找矿方向等进行了讨论。     

Gold—depleted Zone and Its Metallogenic Significance,Yinshan Ore Field,Jiangxi Proveince,China

Based on gold analyses of 213 samples of the Shuangqiaoshan Group in an area of 225km^2 with the Yinshan polymetallic ore district as the center, a depleted zone of gold is recognized around the ore district, suggesting that the Shuangqiaoshan Group may be a source bed for gold .Discus-sions were given concerning the alteration-mineralization features of the Yinshan deposit, the ore-controlling mechanism of the NE-trending fault zone and promising targets for further ore pros-pecting.     

东昆仑成矿带成矿特征与资源潜力分析

东昆仑地处中国中央造山带的西段,横跨青海、新疆两省(区),不仅是我国重要的金属成矿带,也是我国新的黑色有色金属资源基地。该区构造-岩浆活动强烈,成矿地质条件优越,新近发现或扩储了一批大(中)型矿床。区内主攻矿种为钨、锡、金、铁、铜、镍、铅锌等;主攻矿床类型为岩浆熔离型铜镍硫化物矿、造山型金矿、云英岩-矽卡岩-热液脉型钨锡矿、矽卡岩-斑岩型铁铜铅锌多金属矿。本文在综合分析已有各类工作成果基础之上,划分了成矿谱系和矿床成矿系列,开展了资源潜力评价分析,提出了4个一般远景区及4个普通远景区,为进一步找矿工作提供支撑。     

Sensitive High-Resolution Ion Microprobe U-Pb Zircon and 40Ar-39Ar Muscovite Ages of the Yinshan Deposit in the Northeast Jiangxi Province, South China

The Yinshan deposit in the Jiangnan tectonic belt in South China consists of Pb‐Zn‐Ag and Cu‐Au ore bodies. This deposit contains approximately 83 Mt of the Cu‐Au ores at 0.52% Cu and 0.8 g/t Au, and 84 Mt of the Pb‐Zn‐Ag ores at 1.25% Pb, 1.02% Zn and 33.3 g/t Ag. It is hosted by low‐grade metamorphosed sedimentary rocks and mafic volcanic rocks of the lower Mesoproterozoic Shuangqiaoshan Group, and continental volcanic rocks of the Jurassic Erhuling Group and dacitic subvolcanic rocks. The ore bodies mainly consist of veinlets of sulfide minerals and sulfide‐disseminated rocks, which are divided into Cu‐Au and Pb‐Zn‐Ag ore bodies. The Cu‐Au ore bodies occur in the area close to a dacite porphyry stock (No. 3 stock), whereas Pb‐Zn‐Ag bodies occur in areas distal from the No. 3 stock. Muscovite is the main alteration mineral associated with the Cu‐Au ore bodies, and muscovite and chlorite are associated with the Pb‐Zn‐Ag ores. A zircon sensitive high‐resolution ion microprobe U‐Pb age from the No. 3 dacite stock suggests it was emplaced in Early Jurassic. Three ⁴⁰Ar‐³⁹Ar incremental‐heating mineral ages from muscovite, which are related to Cu‐Au and Pb‐Zn‐Ag mineralization, yielded 179–175 Ma. These muscovite ages indicate that Cu‐Au mineralization occurred at 178.2±1.4 Ma (2σ), and Pb‐Zn‐Ag mineralization at 175.4±1.2 Ma (2σ) and 175.3±1.1 Ma (2σ), which supports a restricted period for the mineralization. The Early Jurassic ages for the mineralization at Yinshan are similar to that of the porphyry Cu mineralization at Dexing in Jiangnan tectonic belt, and suggest that the polymetallic mineralization occurred in a regional transcompressional tectonic regime.     

辽宁兴城元台子银铅锌多金属矿成矿条件及找矿前景

元台子银铅锌多金属矿位于兴城首山—大英昌—杨家杖子NW向断裂带与黑风山—梁家沟—季家沟NE向断裂带的交汇部位。银铅锌多金属矿体主要赋存于长城系常州沟组石英岩与燕山早期花岗岩的接触带中,矿体多呈似层状、脉状产出,为热液充填型矿床,成矿与断裂构造与岩浆热液的活动关系密切。该区成矿地质条件优越,是银、铜、钼、铅锌等金属元素的富集区域,找矿潜力较大。     

青海省枪口南银多金属矿床地质特征、控矿因素及矿床成因

枪口南银多金属矿床地处东昆仑多金属成矿带东段,枪口—哈龙休玛海西-燕山期铁、银、铅、锌、铜、金、钼成矿亚带部分,成矿地质条件优越。枪口南银多金属矿区目前已圈定9条矿化带,21个矿体,主要矿种有金、银、铜、铅、锌、钼等,矿石类型主要为构造热液(脉)型铜铅锌银矿石、构造蚀变岩型金矿石。枪口南矿区构造-岩浆活动强烈,印支期—燕山期构造岩浆活动为矿区成矿提供了热源、成矿物质,区内NE向断裂控制区内金、铜、铅锌等矿体的产出,NW向断裂组控制着区内金、银矿(化)体。NW向断裂组,是区内重要控矿构造;区内中部发现的Ⅳ号含矿斑岩体,具有斑岩型矿床蚀变特征,显示其具有斑岩成矿条件。枪口南银多金属矿床成因有构造热液(脉)型、构造蚀变岩型和斑岩型。