山西省代县碾子沟金红石矿的成因分析

金红石在基性岩中是由于自变质作用和后期热液作用的结果,使矿体中金红石加富,该区矿床属岩浆矿床。介绍了代县碾子沟矿区金红石矿产的地质特征,就代县碾子沟矿区金红石矿的成矿原因进行了分析。     

山西代县羊廷寺金红石矿地质特征及找矿方向

羊廷寺金红石矿床位于五台西段草垛山-分岭背斜南翼,金红石矿体赋存于碾子沟上段地层中,矿体产状与地层产状一致,矿化是吕梁期热液活动强烈影响的结果,矿床矿岩石主要为阳起透闪岩、绿泥透闪岩等.基性变质岩与后期构造热液活动叠加的地段是今后找矿方向.     

山西代县碾子沟—羊廷寺一带金红石矿赋存层位及成矿规律

介绍了山西省代县碾子沟—羊廷寺一带的区域构造和岩性,分析了该带金红石成矿的规律。     

山西代县金红石矿的成因新认识

介绍了代县金红石矿区地质背景和矿石特征,分析了前人对该矿床的成因认识。结合最新的锆石年代学和岩石地球化学研究,提出该金红石矿是由发生海水热液蚀变的基性岩石再经历中高压角闪岩相的变质作用形成。矿石中富Mg(Fe)和贫Ca(碱)的特征由水热蚀变引起。矿石中富Ti的特征主要继承自原始基性岩,并可能在热液蚀变过程中进一步富集。     

代县金红石矿矿石特征及应用前景分析

山西代县金红石矿是一个特大型金红石矿床,在对该矿床的矿石特征进行研究的基础上,分析了影响该矿康开发利用的各种因素．并对矿床的开发利用前景进行初步评价.     

祁雨沟J5隐爆角砾岩型矿床控矿地质条件及找矿方向浅析

祁雨沟金矿区位于我国著名豫西金矿成矿带上,是一典型的矿产集中区。本文通过对区内J5角砾岩型矿床形成地质特征及成因的分析,认为岩体深部还有隐伏矿床存在,期望矿区有较大的找矿前景。     

含偶氮染料工业废水处理的实验

对南墅石墨矿尾矿进行回收，得到天然岔红石精矿。通过粉碎、分级等手段制备了天然金红石光催化材料。用制备的天然金红石光催化材料处理含偶氮染料工业废水。结果表明：在紫外光照射条件下处理4h后，其对偶氮染料工业废水的脱色率达到88．37％。对比实验表明其对偶氮染料的作用既有吸附，也有降解，说明该天然金红石光催化材料有一定的光催化活性。     

含偶氮染料工业废水处理的实验

对南墅石墨矿尾矿进行回收,得到天然金红石精矿。通过粉碎、分级等手段制备了天然金红石光催化材料。用制备的天然金红石光催化材料处理含偶氮染料工业废水。结果表明:在紫外光照射条件下处理4 h后,其对偶氮染料工业废水的脱色率达到88.37%。对比实验表明其对偶氮染料的作用既有吸附,也有降解,说明该天然金红石光催化材料有一定的光催化活性。     

云南省墨江县金厂金矿深部成矿预测

本文通过对哀牢山成矿带区域地质背景、矿床地质特征、矿床成因、金镍矿床富集规律的分析研究,总结了矿区控矿因素,进而分析了金镍矿床的成矿物质来源,预测了矿区深部成矿的有利地段。     

苏北超高压变质带榴辉岩型金红石矿床及其成因

在苏鲁超高压变质带南部数千个榴辉岩体中，已发现了40个含金红石榴辉岩体，金红石储量达数百万吨。在综述、分析该带榴耀岩的空间分布、岩石矿物学、含矿性等特性的基础上，确定了块状榴辉型和片麻状榴辉岩型两种主要矿石类型。金红石在矿石中主要呈包裹体、粒间充填、蚀变残余和热液充填四种赋存形式，分别代表了四个不同的形成阶段。电子探针分析显示，在高压、超高压变质作用期间，富含Na的深部流体对金红石的成矿可能起了重要的作用。该矿床属典型的榴耀岩型金红石矿床，在成因上与超高压变质作用有关，类似于挪威的Engebφfjellet、俄罗斯的Shubino村和意大利的Pian Paludo矿床，而不同于我国已知的主要金红石矿床。     

西昆仑上新世隆升的砂岩重矿物特征及金红石地球化学记录

对西昆仑造山带山前叶城地区柯克亚剖面新生代砂岩样品中重矿物及碎屑金红石的微量元素进行分析, 结果表明重矿物含量及其组合特征具有明显分段性, 上新世阿图什组(N2a)底部以下为较稳定重矿物阶段, 以上为不稳定重矿物阶段, 反映西昆仑在上新世经历过一期快速隆升过程。碎屑金红石微量元素特征表明, 剖面从下至上, 源岩为泥质变质岩的比例逐渐降低, 基性变质岩的比例逐渐增高, 反映西昆仑快速隆升导致基底被抬升剥蚀, 基底岩石对物源的贡献增大。金红石母岩类型主要为角闪岩/榴辉岩相和麻粒岩相变质岩, 可能由于西昆仑西部快速隆升, 形成西高东低的地貌格局, 西昆仑西部成为该区的优势物源区。     

Phase equilibria of HP-UHP mica-schists in Jiangling,Eastern Dabieshan orogen

The HP-UHP metamorphic terrane of Jiangling, eastern Dabieshan comprises extensively distributed granitic gneisses, mica-schists and numerous eclogite blocks. The mica-schists generally contain garnet, phengitic muscovite, biotite, plagioclase, quartz, rutile and a small amount of epidote and hornblende. Study on petrography and phases equilibria in the NCKMnFMASH system indicates that the present mineral assemblages in mica-schists are not in equilibrium. The earlier stage of mineral assemblage represented by garnet and phengite reflects a HP-UHP condition. The garnet compositions and the phengite Si contents give a PT condition of 580-00 ℃ at 2.6-2.8 GPa. The garnet zonation records an earlier progressive metamorphic process which may be associated with the appearance of glaucophane, jadeite and lawsonite. The later stage of mineral assemblage characterized by the presence of biotite and plagioclase reflects a PT condition of 620-635℃ at 0.9-1.1 GPa, belonging to the HP amphibolite facies. The main mineral assemblage in mica-schists from the Jiangling region has recorded a complete HP-UHP metamorphic process.     

A combined study of SHRIMP U-Pb dating, trace element and mineral inclusions on high-pressure metamorphic overgrowth zircon in eclogite from Qinglongshan in the Sulu terrane

Methods recently advanced for discrimination on the genesis of metamorphic zircon, such as analysis of mineral inclusions and trace elements, provide us powerful means to distinguish zircon overgrowth during high-pressure metamorphism. Zircons in ultrahigh-pressure eclogite from Qinglongshan in the Sulu terrane were studied by the SHRIMP U-Pb method in combining with trace element and mineral inclusion analyses. No inherited core was identified in the analyzed zircons by means of cathodoluminescence images. The occurrence of high-pressure metamorphic mineral inclusions in zircon, such as garnet, omphacite, rutile, and the flat HREE pattern in zircon indicate that the zircon formed at high-pressure metamorphic conditions. Therefore, a weighted average U-Pb age of 227.4±3.5 Ma obtained from such a kind of zircon is interpreted to represent the timing of peak nietamorphism for the Qinglongshan eclogite.     

山西繁峙县金鸡沟矿区多金属矿地质特征及成矿规律

繁峙县金鸡沟多金属矿区位于华北地台北缘,山西断隆—五台隆起北东部,矿区经多次构造变动,在区内形成了一系列断裂破碎带,后经热液多次充填、叠加,金、多金属元素得到进一步的富集,在部分有利地段形成了金、多金属矿体。通过对地质、矿床特征、控矿因素的分析研究,总结出了区内构造发育,岩浆活动频繁,矿产资源丰富,周边已知金属矿产有金、银、铜、铅、锌、钼、铁矿床多处,成矿地质条件良好,找矿潜力巨大。     

Phase equilibria of HP–UHP mica-schists in Jiangling, Eastern Dabieshan orogen

The HP–UHP metamorphic terrane of Jiangling, eastern Dabieshan comprises extensively distributed granitic gneisses, mica-schists and numerous eclogite blocks. The mica-schists generally contain garnet, phengitic muscovite, biotite, plagioclase, quartz, rutile and a small amount of epidote and hornblende. Study on petrography and phases equilibria in the NCKMnFMASH system indicates that the present mineral assemblages in mica-schists are not in equilibrium. The earlier stage of mineral assemblage represented by garnet and phengite reflects a HP–UHP condition. The garnet compositions and the phengite Si contents give a PT condition of 580–600℃ at 2.6–2.8 GPa. The garnet zonation records an earlier progressive metamorphic process which may be associated with the appearance of glaucophane, jadeite and lawsonite. The later stage of mineral assemblage characterized by the presence of biotite and plagioclase reflects a PT condition of 620–635℃ at 0.9–1.1 GPa, belonging to the HP amphibolite facies. The main mineral assemblage in micaschists from the Jiangling region has recorded a complete HP–UHP metamorphic process.     

青海托勒南山地区航磁异常特征及钛铁矿找矿方向

青海托勒南山一带矿产资源丰富,以钛、磁铁、金、铅锌等多金属矿为主,研究区位于托勒南山以北大白石头沟一带,分布两处明显磁异常带。在总结分析研究区区域地质背景的基础上,通过对航磁异常的综合查证,结合前人地质、矿产、物探、化探等资料,重点对区内航磁异常的成因、地质背景、矿化蚀变、成矿条件、找矿标志等进行了综合研究,筛选了3处找矿有利地段,为下一步该区开展矿产勘查工作提供重要找矿线索。     

陕西省汉阴县长沟金矿地质和地球化学特征

陕西省汉阴县北部岩金矿带是陕西省贵金属矿产资源主要勘查评价区带。本文以该金矿带内长沟金矿为研究目标,通过已有资料的分析研究、野外调查、岩矿测试,总结长沟金矿的地质与地球化学特征,对矿床成因进行浅析。