微细浸染型金矿床成矿物质来源

通过对我国微细浸染型金矿床稳定同位素、黄铁矿微量元素及ＲＥＥ特征等的分析研究发现;硫源既有深源特征：又有浅源（地层源）特征;含矿热液既有变质水、天水特征,又有岩浆水特征。矿石中黄铁奔放微量元素主要反映沉特征;ＲＥＥ演化特征表明：矿民 有生因联系,据此认识,微细浸染型金矿床成矿物质具多来源性,既有地层源又有岩浆－－热液源,以前者为主。前者是成矿的基础,后者是（矿石）叠加变富条件。     

桂西金牙微细浸染型金矿床同位素地球化学研究

本文对桂西金牙微细浸染型金矿床作了氢、氧、碳、硫、铅和锶同位素地球化学研究。获得该矿床早期成矿热液源于同生热卤水，而晚期成矿热液则是由下渗雨水与封存的油田卤水混合形成混合热液的同位素证据。成矿热液中的硫主要源自赋矿地层中三叠统百蓬组。获得两组同位素年龄，其中２０６±１２Ｍａ属印支末期，是金矿床早期同生热卤水成矿年龄。１３０－８２Ｍａ为燕山期，代表金矿床晚期混合热液成矿的年龄。     

川西北微细浸染型金矿床中毒砂标型特征

川西北地区微细浸染型金矿床，主要产于具轻微变质的沉积岩地层中，矿石中除见极少中一细粒显微状自然金外，金主要呈超（次）显微状赋存于含金矿物中；矿石中与黄铁矿，辉锑矿，雄黄等紧密共生的毒砂，呈针状和梭状，低显微硬度，矿物成分以富硫讽的盆砷，并含金贫解及多种杂质元素。成分复杂的含金低温型毒砂，为寻找该类型金矿的标志矿物之一，并具有成因标型意义。     

铊──寻找微细浸染型金矿床的指示元素

本文对桂西北几个微细浸染型金矿床研究表明：Tl在矿石中富集，K／Tl、Ba／Tl比值，在矿石中明显低于围岩，Tl含量、K／Tl、Ba／Tl比值离差小，变化稳定，利用他们作为指示元素及特征比值寻找微细浸染型金矿床是一条可行途径。     

陕南某微细浸染型金矿床地球化学异常模式

陕南某微细浸染型金矿床是从发现金矿田（床）水系沉积物异常开始，运用地质，地球化学综合方法对异常反复踏勘检查，系统开展大比例尺化探详查找矿程序后找到一处有望成特大型的金矿床。     

硒—微细浸染型金矿床中的一个重要指示元素

迄今人们所了解的微细浸染型金矿床的主要指示元素是Ｓｂ、Ａｓ、Ｔｌ、Ｈｇ、Ｔｅ等。通过对西秦岭南亚带较典型的拉尔玛微细浸染型金矿的研究，提出Ｓｅ也是此类金矿的一个重要指示元素。     

国内外微细浸染型金矿床研究现状及发展趋势

微细浸染型金矿床,亦称为"卡林"型金矿床,是60年代初期发现的一种热液金矿新类型,广泛分布于美国西部、我国西南部及秦岭地区,是目前国内外重要的金矿床类型之一.本文从其概念、形成地质背景、层控性及矿源层、矿物组合及金的赋存状态、成矿模式及热液成矿机制等方面,概述了当前对该类金矿床研究和认识现状,并就其发展趋势提出了自己的看法.     

中国微细浸染型金矿床围岩蚀变地质特征

微细浸染型金矿的围岩蚀变一般较弱,主要蚀变类型以硅化、碳酸盐化、粘土化、绢云母化为主;围岩蚀变与容矿岩石类型及其岩性组合密切相关,化学组分的变化因围岩的性质而异;金矿化强度与围岩蚀变强度和蚀变组合复杂程度成正比,金矿体出现在蚀变中心部位或蚀变分带的内带.     

我国微细浸染型金矿床的形成条件及成矿作用特征

微细浸染型金矿床是我国主要的热液金矿床之一,空间上多分布于扬子地台周边地区,其产出成受大地构造背景及地层、构造和一定的热动力条件的控制。我国该类型金矿床成矿作用总体具有如下特点：①矿化点多面广,但规模相对较小;②区域上金矿化常与Ｈｇ、Ｓｂ、Ａｓ及Ｕ等元素低温热液矿床密切共（伴）生;③矿床形成具多期多阶段性,且其成因复杂多样;④成矿时代主要为印支晚期－燕山期。     

微细浸染型金矿研究现状评述

归纳了国内外微细浸染型金矿的基本特征，研究的可能途径及其存在问题，指出了进一步工作的方向。     

Metamorphic Rock-hosted Disseminated Gold Deposits--A Case Study of the Xiaotongjiapuzi Gold Deposit of Eastern Liaoning

The Xiaotongjiapuzi gold deposit occurs in a Palaeoproterozoic rift accretionary terrane in eastern Liaoning and is hosted by a carbonate formation of the Dashiqiao Formation, Liaohe Group. The metamorphic grade of the host rock is low amphibolite-high greenschist facies. Gold, which is mainly invisible, is distributed in pyrite and arsenopyrite. The grains of Au-bearing sulphide minerals are fine, ranging from 0.0 n to 1 mm. The wall-rock alterations are characterized by low-temperature silification, hydro-sericitization, sericitization and carbonatization. The homogenization temperatures of the fluid inclusions in quartz closely associated with gold mineralization range from 140 to 240° C. The metallogenic age represented by the Ar-Ar isotopic age of sericite is 167 Ma. Comparisons and studies show that the Xiaotongjiapuzi gold deposit can be classified as the submicron-sized disseminated deposit (analogous to the Carlin-type) hosted in metamorphic rocks.     

Metamorphic Rock-hosted Disseminated Gold Deposits—A Case Study of the Xiaotongjiapuzi Gold Deposit of Eastern Liaoning

The Xiaotongjiapuzi gold deposit occurs in a Palaeoproterozoic rift accretionary terrane in eastern Liaoning and is hosted by a carbonate formation of the Dashiqiao Formation, Liaohe Group. The metamorphic grade of the host rock is low amphibolite-high greenschist facies. Gold, which is mainly invisible, is distributed in pyrite and arsenopyrite. The grains of Au-bearing sulphide minerals are fine, ranging from 0.0 n to 1 mm. The wall-rock alterations are characterized by low-temperature silification, hydro-sericitization, sericitization and carbonatization. The homogenization temperatures of the fluid inclusions in quartz closely associated with gold mineralization range from 140 to 240° C. The metallogenic age represented by the Ar-Ar isotopic age of sericite is 167 Ma. Comparisons and studies show that the Xiaotongjiapuzi gold deposit can be classified as the submicron-sized disseminated deposit (analogous to the Carlin-type) hosted in metamorphic rocks.     

Structural Control to the Genesis of Sediment-hosted Disseminated Jinlongshan Gold Orebelt, China

Abstract. Jinlongshan gold orebelt is a newly discovered sediment-hosted gold orebelt in Southeastern Qinling Mountains hosted by Late Devonian to Early Carboniferous sedimentary rocks. The location of the belt is regionally controlled by E-W striking Zhenan-Banyan and Ningshan Faults, which were formed during the Indo-Sinian Orogeny. Circular patterns on TM images indicate that intrusive rocks occur at shallow depths in the Jinlongshan orebelt. Two basic types of disseminated and vein-type mineralization have been recognized. Calcareous siltstone is the most favorable host for disseminated mineralization. Vein-type mineralization is mostly hosted by limestone. Locally vein-type mineralization has envelop of disseminated mineralization.
Gold deposits are distributed north and south of the Zhenan-Banyan Fault zone, and the zone is considered to be the feeder zone and pathway for mineralizing fluids. During the Indo-Sinian Orogeny, magmatic and orogenic fluids may have extracted gold and other elements from underlying Proterozoic rocks and Paleozoic sedimentary rocks. The ore solutions evolved continuously with sedimentary rocks until gold was precipitated in appropriate structural sites. Exploration needs to be expanded along the Jinlongshan gold orebelt, focusing on inferred concealed intrusions and calcareous host rocks close to the Zhenan-Banyan Fault.     

Metallogeny of the Lannigou Sedimentary Rock-hosted Disseminated Gold Deposit in Southwestern Guizhou Province, China

The Lannigou deposit is a large-sized sedimentary rock-hosted disseminated gold （SRHDG） deposit located in the Youjiang Basin. It is hosted by the Middle Triassic turbidite. Wall rock alterations, including silicification, pyritization, arsenopyritization, carbonatization and argillization, commonly occur along fractures. PGE study demonstrates that either Permian basalts or Triassic ultrabasic intrnsives are unlikely to be the main source of gold mineralization. Coupled with the lack of other nmgmatic activity in the vicinity of the mining area, an amagmatic origin is proposed. Organic matter compositions and GC-MS analysis of the ores and host rocks show that the organics in the ores and the host rocks have a common source; the organic matter in the ores was mainly indigenous. The positive correlation between S2 and Au contents, along with the common occurrence of organic inclusions, suggest involvement of organic matter in the ore-forming process in terms of promoting Au leaching from the source rocks, making colloidal Au migration possible, as well as hydrocarbon reduction of sulphate. Geological and geochemical characteristics of the Lannigou deposit suggest that it was formed through circulation of meteoric water and probably less importantly organic bearing formation water driven by high geothermal gradient caused by late Yanshanian extension, which leached Au from the source bed, and then migrated as Au-bisnlfides and colloidal Au, culminating in deposition by reduction-adsorption and surface complexation of gold onto the growth surface of arsenlan pyrite.     

川西北马脑壳微细浸染型金矿床地质特征及矿床成因

文章在系统总结马脑壳微细浸染型金矿床地质特征、成矿时代的基础上。通过稀土元素及氢、氧同位素地球化学研究，分析了矿床成因。结果表明，马脑壳金矿床形成于印支晚期，其成矿物质来自围岩地层，岩浆流体参与了成矿作用，矿床为与岩浆活动有关的混合热液金矿床。     

青海省泽库县瓦勒根金矿矿床地质特征及成因分析

瓦勒根金矿床地处西秦岭,是在西秦岭成矿带青海省境内发现的唯一一处大型金矿床。通过分析瓦勒根矿区地质背景、矿床(体)特征、岩(矿)石化学成分及含量,认为金矿体主要产于早、中三叠世隆务河组的由碎屑岩、碳酸盐岩构成的沉积岩和中酸性侵入岩容矿岩石中,矿石由含金矿物呈浸染状分布在容矿岩石中构成,就位于断裂空间,严格限制在断裂破碎带中。金矿床的形成是构造运动、岩浆活动和沉积作用的综合产物,金矿床的形成受成矿物质来源、成矿环境和成矿作用3个要素共同制约。区域上与甘肃境内合作、夏河金矿化带相连,其成矿背景与枣子沟金矿、寨上金矿、大桥金矿、阳山金矿及南部玛曲-南坪金成矿亚带的大水、忠曲金矿一致,矿床成因特征非常相似,同属微细粒浸染型金矿床。     

Organic Geochemistry of Sedimentary Rock-hosted Disseminated Gold Deposits in Southwestern Guizhou Province, China

Sedimentary rock-hosted disseminated gold (SRHDG) deposits in the Youjiang-Nanpanjiang Basin,southwestem Guizhou Province are commonly hosted by the same fold crests that commonly contain a remarkable amount of organic material. The total organic carbon (TOC) contents of the ores and host rocks are usually less than 1%. The reflectance of vitrinite and pyrobitumen in the ores and the host rocks ranges from 1.5% to 4.5%, often in the range of 2% to 3%. In the Lannigou deposit, the reflectance of vitrinite and pyrobitumen in the ores is usually somewhat higher than those within the host rocks, indicating a hydrothermal impact on the organic matter in the altered host rocks. On the contrary, the estimated maximum paleotemperatures of the Getang and Zimudang deposits are higher than the homogenization temperatures of the fluid inclusions in the ores, signifying that the organic matter maturation predated Au mineralization. No correlation between the organic matter contents and Au concentrations were recognized in the ores.However, the most striking observation is that there is a positive correlation between the $2 (a parameter of Rock-Eval analysis), Au and As contents of the ores in the Lannigou deposit. Organic matter maturation and migration is apparent from the TOC vs. HCI diagram. Furthermore, group analysis of the dichloromethane extractable organic component of the ores and host rocks shows that the maturation degree of the organic matter in the ores is slightly higher than that of the host rocks in the Lannigou gold deposit. However, the compositions of their alkanes, steranes and terpenes, which serve as biomarkers, are quite similar; this suggests that the organic matter found in the ores and host rocks has a common marine source. Organic matter probably contributed to the preconcentration of Au in the host rocks. Hydrocarbons in the system,on the other hand, clearly contributed to the emplacement of the gold mineralization through thermal sulfate reduction.Organic matter in the solution might have increased the potential of the hydrothermal solution to transport Au.     

Bio-organic Geochemical Characteristics of Gold Deposits in Northwestern Guangxi and Their Metallogenetic Significance

The gold deposits of Triassic period in the northwestern Guangxi are all located in the marine, fine-grained ,fragmental rock series containing organic matter , i.e. the distribution districts of black rock series . The fine-grained gold deposits occur in organic matter-bearing C, D, E, or D, E divisions of the classical Bouma sequences. The evolution degree of organic matters through oil window stage reached the over-mature degree. Both the bio-sources of the organic matters and the distribution of gold in the organic matters disclose the close association between gold, living beings and organic matters. The thermal evolution of organic matters led to the gold to be activized , migrated and enriched , and finally formed gold deposits in the fault belt and crushed zone of black rock series.     

贵州贞丰塘新寨金矿床地质特征

本文结合区域地质背景叙述了塘新寨微细浸染型金矿床地质特征，探讨了成矿与地层岩性，构造，蚀变的关系，并初步探讨其成矿条件与成矿作用。     

甘肃东海金矿床地质特征及开发利用

东海金矿床位于甘肃北山重要的Au,Ag多金属成矿带上,为一含伴生Ag的多金属金矿床.具长期活动特征的花牛山-察客尔呼都格压扭性断裂横贯成矿带,成矿的有利位置为大断裂及次一级断层、层间裂隙,断裂控矿十分明显.主要矿石类型为破碎蚀变岩型(据氧化程度不同,又分为氧化矿和原生矿)、石英脉型.目前黄金生产只对氧化矿采用堆浸法提金,贵液吸附工艺由原来的活性炭吸附法,改用锌粉置换沉淀法后,使贵液中的Au和Ag得到了充分的回收利用,对原生矿的开发利用则需要进一步的研究.