Ein Beitrag zur Geochemie und Entstehung der Oberpfälzischen Kaolin-Feldspat-Lagerstätten

The plagioclase of the kaolinised granite of Tirschenreuth is decomposed quantitatively and the biotite almost quantitatively, on the contrary potassium feldspar and mucovite of the parent rock remained unaffected by kaolinisation. The quantity of produced kaolinite is equivalent to the quantity of decomposed plagioclase and biotite. The rare elements Pb, Cu, Cr, Ni, P, and Ti from the kaolinised minerals are adsorbed quantitatively by the kaolin. All other elements are diminished, no element has been added to the kaolin from other sources than from parent rock material. The selective decomposition of plagioclase and biotite in the kaolin-feldspar deposit of Tirschenreuth and the association of rare elements in the kaolin are explainable by weathering processes only. Kaolins from Hirschau-Sehnaittenbach are characterised by extremely high concentrations of the rare elements Ba, Sr, Pb, Cu, and P. The association of rare elements of the kaolin has been originated from the decomposed potassium feldspar of the kaolinised arcoses. The rare elements Pb, Cu, Cr, and P are adsorbed quantitatively by the kaolin. The other elements are diminished, Ba and Sr inclusive and in spite of their high absolute concentrations. The composition of the arcoses of Hirschau-Schnaittenbach prior to kaolinisation is calculated to 56% of quartz and 44% of potassium feldspar by means of the quantities of the elements Pb and Cu analysed in the feldspar and in the kaolin. The kaolin of Hirschau-Schnaittenbach has originated by weathering of the potassium feldspar of the Triassic arcoses. The kaolinisation is of Triassic age because kaolins of the Hirschau-Schnaittenbach type were redeposited near Ehenfeld in the Cenomanian. Kaolin deposits of hydrothermal origin are characterised by a zonal structure and are associated by ores. They are different in geological behaviour and mineral association from kaolin deposits which originated by weathering of feldspathic rocks like the deposits of Tirschenreuth and Hirschau-Schnaittenbach (Upper Palatinate, Bavaria).     

Volty?ov gold deposit: Case history from the Bohemian Massif, Czechoslovakia

The Voltýov gold deposit in Central Bohemia is situated in the contact zone of granitic rocks of Variscan age and the Upper Proterozoic and Lower Paleozoic metasediments of the Krásná Hora Metamorphic Islet — the relict of an original sedimentary cover. Goldbearing quartz mineralization of vein and stockwork types is developed in rocks of both geological units, its form depending upon lithology. While ore shoots in metasediments and orthogneiss form generally regular bodies several tens of meters thick, those developed in granodiorite are rather irregular, without any indication of the tectonic control of the mineralization. The mineralized zone peters out extremely rapidly downwards, with a marked decrease both in extent and in gold contents. The gold-bearing mineralization is formed by two generations of gold, both of high fineness (over 900) and very fine-grained (5–20 m). The gold is accompanied by accessory arsenopyrite, maldonite and other Bi-Te minerals, scheelite, and exceptionally chalcopyrite, pyrite, and sulphosalts. Gold contents are 2–3 g/t on average. In addition, late quartz-carbonate mineralization, with U and Se minerals and remobilized gold, is also present. Detailed soil prospecting (25 × 50 m grid) of the deposit detected a large and constrasting gold halo with gold contents exceeding 2 ppm (–200 mesh fraction), accompanied by higher concentrations of characteristic pathfinders — above all As and Bi. The halo extent exceeds the area of the ore outcrop by several times. The origin of gold mineralization in the deposit is explained by remobilization of gold from orthogneiss by the intrusion of the Central Bohemian Pluton.     

福建郭山高岭土矿床中高岭矿物的研究

本文运用X射线衍射、红外吸收光谱、分析电子显微术和化学分析等多种方法对福建郭山高岭土矿床中的高岭矿物(高岭石和埃洛石)的矿物学性质、分布及矿物形成的阶段性变化进行了系统研究。结果表明,根据高岭石和埃洛石相对含量的多少,花岗岩风化剖面全风化带划分的4个矿物段可以反映这两种矿物的分布特点。埃洛石为具有管状和多面体球状的7?型以及10?—7?、7?-高岭石过渡型。高岭石晶体形态和结晶有序度在风化剖面垂直方向上的规律性变化与高岭石的形成经历了初始结晶——强烈高岭土化——风化作用后期的阶段性变化有关。     

Resources of Kaolinite Rocks in China Coal Measures

The kaolinite rocks are very abundant in China coal mea-sures,most of which are very pure,excellent and in goodquality for industrial use.The geological feature,occurrence,origin and processing techniques are largely different fromthose of the traditional kaolins.The kaolinite rocks in Chinacoal measures are marvelous,but a large-scale kaolinite de-posit is rare in the world.The origin of kaolinite rocks in thecoal measures is under debate for a long time(Liu and Zhang,1 997;Liang,1 995;Boho…     

Sodic metasomatism in a dacite weathering profile in Pinxiang, Guangxi, China

The Pinxiang weathering profile is well developed on Early Triassic dacite lavas of the Baisi Formation. At the top of the profile is developed a red clay zone which is characterized mineralogically by kaolinite, iron oxide minerals, quartz, and a small amount of illite, montmorillonite and vermiculite. In going downwards the red clay zone gives way to a saprolite zone in which plagioclase pseudomorphs have been well preserved although replaced by kaolinite. Beneath the saprolite zone is the saprock zone characterized by less weathering for dacite. At the bottom of the weathering profile is the parent material, dacite, which is composed mainly of plagioclase, quartz, K-feldspar and biotite which have been largely altered into chlorite owing to submarine extrusion of dacite lavas. Some layers in the weathering profile show obvious sodium enrichment and potassium depletion relative to others. In the Al2O3-(CaO* Na2O)-K2O triangular diagram, the weathering trends of these layers in the middle stage are remarkably deviated from normal ones. Both mineralogy and micro-morphology of these layers indicate such deviation resulted from sodic metasomatism of orthoclase.     

浙江方家山高岭土矿床中高岭石亚族矿物的研究

珍珠陶石、地开石和高岭石是高岭石亚族矿物的三种多型。其中高岭石最常见,地开石较少见,而珍珠陶石是十分罕见的多型。本文作者应用Ｘ射线衍射、红外光谱和醋酸钾夹层化合物的方法,研究了浙江方家山高岭石矿物特征。研究表明,用醋酸钾为夹带剂形成的珍珠陶石夹层化合物具有１４．０的特征衍射峰,经水分子取代后形成８．３５特征的珍珠陶石水合化合物,而高岭石仅部分形成７．３０水合夹层化合物。从而确定了方家山高岭土矿床是以高岭石为主含珍珠陶石的矿床,其珍珠陶石主要赋存于粗粒级的高岭土中。高岭石与珍珠陶石晶畴呈消长关系可能说明珍珠陶石是后期较强应力下由高岭石转变来的。     

黑龙江金厂金矿床18号矿体围岩蚀变及短波红外光谱特征

金厂金矿18号矿体围岩蚀变发育顺序从早到晚为:钾化、硅化、绿泥石化、绢云母化、碳酸盐化、高蛉土化,从内往外依次发育青磐岩化带、绢英岩化带和钾化带.矿化出现在泥化和绢英岩化叠加处,以及泥化和青磐岩化叠加处.通过短波红外光谱测试技术,识别出本矿区有26种蚀交矿物,其中白云母含量与金矿体呈正相关,说明绢云母化与金矿化关系密切;青磐岩化带蚀变矿物组合为绿泥石+绿帘石+伊利石±埃洛石±蒙脱石±石英;钾化带蚀变矿物组合为钾长石+高岭石+埃洛石±蒙脱石±石英;绢英岩化带蚀变矿物组合为绢云母+埃洛石±蒙脱石±高岭石±石英.     

Kaolin deposits at Melthonnakkal and Pallipuram within Trivandrum block, southern India

The kaolin deposits at Melthonnakkal and Pallipuram mines form part of the Warkalli Formation belonging to the Tertiary sequence in southern Kerala and occur at the boundary between the Tertiary sequence and Precambrian granulite facies metapelites (khondalites). The sedimentary clays are composed mainly of kaolinite, quartz and gibbsite. XRD and SEM studies have revealed that kaolinite is well-crystallized variety and the platy crystals are scarcely broken in the sedimentary clays. These sedimentary kaolins are considered to have been formed by intense tropical weathering of the khondalites, and subsequently transported and deposited with high organic input into lakes near the weathering crust over the basement rock. Besides, the surficial parts of the sedimentary deposits are extensively lateritized with the formation of goethite and hematite by Quaternary tropical weathering processes.     

景德镇地区高岭石红外光谱分析

采用红外光谱实验结合氢氟酸化学处理方法深入研究景德镇地区高岭石结构特征。通过解析红外光谱图确定该区高岭石为无序高岭石范畴,其结构中含有似地开石结构BCBCBC的八面体空位取代。通过对比氢氟酸处理前后的红外图谱,分析出该地区高岭土不含有地开石和珍珠石这两种多型。实验表明红外光谱分析对高岭土中存在的次要矿物伊利石不灵敏,而利用氢氟酸处理可以有效地鉴别,因而提出了一种利用红外光谱鉴定高岭石-伊利石混合物相的新方法。     

赣南合龙钨矿矿床地质、成岩成矿时代与成矿模式

合龙钨矿床位于南岭东西向构造岩浆带与北-北东向于山构造带交汇部位,是南岭东段于都-赣县矿集区的重要组成.合龙钨矿床是赣南地区近年在石英脉型钨矿勘查取得最重要突破的矿区,新发现钨多金属矿体达48条,新探明黑钨矿资源量3.5万余吨,WO3平均品位2.189％,深部具有大型以上资源潜力.合龙钨矿床以外带石英大脉型矿体与岩体内...     

The Hizeh-Jan Kaolin Deposit of NW Iran:the TetradEffect in REE Distribution Patterns

The Hizeh-Jan kaolin deposit(northwest of Varzeghan, East-Azarbaidjan Province, NW Iran) is a product of the alteration of Eocene andesitic rocks. Based on mineralogical examinations, kaolinite, quartz, smectite, pyrophyllite, muscovite-illite, alunite, calcite, diaspore, goethite and hematite are the most abundant mineral phases in this deposit. The geochemical indicators, such as Y/Ho and Zr/Hf, indicate the non-CHARAC(non-Charge-radius control) behavior of these pairs, which are likely to be due to the occurrence of the tetrad effect phenomenon in this deposit. Simultaneous concave and convex shapes in the chondrite-normalized REE distribution patterns are a remarkable feature of the kaolin samples. Bivariate diagrams of the size of the third tetrad effect(T_3) versus geochemical parameters such as Y/Ho, Nb/Ta and Zr/Hf ratios display two distinct populations for the kaolin samples. The first population is characterized by high T_3 values(>0.13), which are near or on the fault zone. The second population is characterized by low T_3 values(<0.13), and are farther from the fault zone. The obtained results from the geochemical data have furnished compelling evidence that fluidrock interaction, overprint of hypogene processes by supergene ones, and structural control, are key controlling factors for the occurrence of tetrad effects in REE distribution patterns in the Hizeh-Jan kaolin deposit.     

Zur Diagenese fluviatiler Sandsteine

Are cement minerals that form during the first stages of diagenesis indicative of the environment of deposition? Discussions of fluvial, marine, and evaporitic sandstones of Triassic and Upper Carboniferous age (fig. 1) indicate that kaolinite, sudoite, and potassium feldspar cements can be regarded as characteristic of freshwater sandstones, whereas (early) chlorite, analcime and albite cements are found in marine and evaporitic sandstones mainly, provided that influences of meteoric water during diagenesis can be excluded. Humid climate favors kaolinite, arid favors potassium feldspar. Early diagenetic siderite concretions develop in coal swamps. Reddish biotites are not resistant during synsedimentary weathering in humid alluvial plains. As a consequence of increasing pH, temperature, and salinity of the interstitial fluids with increasing burial depth, common sequences of cementation include (1) silicates + quartz, (2) carbonates, (3) sulphates, (4) halite (fig. 3). The formation of quartz — the most important cement — is mainly governed by modifications of the micro-environment (e.g. pressure solution). In the Lower Triassic Buntsandstein, lithification due to quartz cementation occurred at a burial depth of about 1000–1200 m in alluvial as well as in brackisch to marine sandstones. Cementation by potassium feldspar (in the alluvial sandstones) and by analcime transforming into albite (in the brackish to evaporitic sandstones) occurred earlier. This was shown by investigations of minus-cement-porosity and contact strength (fig. 2).     

Infrared spectral reflectance characterization of the hydrothermal alteration at the Tuwu Cu–Au deposit, Xinjiang, China

Short-wave infrared (SWIR) reflectance spectroscopy was used to characterize hydrothermal minerals and map alteration zones in the Tuwu Cu–Au deposit, Xinjiang, China. The Palaeozoic hydrothermal system at Tuwu is structurally controlled, developed in andesitic volcanic rocks and minor porphyries. Hydrothermal alteration is characterized by horizontally zoned development of quartz, sericite, chlorite, epidote, montmorillonite and kaolin about individual porphyry dykes and breccia zones, as is shown by changes outward from a core of quartz veining and silicification, through an inner zone of sericite + chlorite to a marginal zone of chlorite + epidote. The alteration system comprises several such zoning patterns. Silicification and sericitization are spatially associated with Cu–Au mineralization. Zoning is also shown by compositional variations such that Fe-rich chlorite and Al-rich sericite occur preferentially toward the core and the most intensely altered parts, whereas Mg-rich chlorite and relatively Al-poor sericite are present on the margin and the relatively weakly altered parts of the hydrothermal alteration system. The compositions of chlorite and sericite, therefore, can be potentially used as vectors to Cu–Au mineralization. Montmorillonite and kaolinite, of probable weathering origin, are located near the surface, forming an argillic blanket overlying Cu–Au mineralization. Sporadic montmorillonite is also present at depth in the hydrothermal alteration system, formed by descending groundwater. Presence of a well-developed kaolinite-bearing zone on the surface is an indication of possible underlying Cu–Au mineralization in this region. Epidote occurs widely in regional volcanic rocks, as well as in variably altered rocks on the margin of the hydrothermal mineralization system at Tuwu. The widespread occurrence of epidote in volcanic country rocks probably reflects a regional hydrothermal alteration event prior to the localized, porphyry intrusion-related hydrothermal process that led to the Cu–Au mineralization at Tuwu.     

红土型金矿床综述(英文)

近二十年来 ,热带地区普遍存在的红土型风化作用及其对矿床与矿化带的影响引起了普遍的关注。红土型风化壳的主要矿物成分是以铁铝的氧化物及氢氧化物和粘土矿物为主 ,如针铁矿、赤铁矿、铝土矿、高岭石及石英等 ,与其未风化的母岩相比 ,含有相当高的铁和铝。红土型风化过程中 ,易溶元素均不同程度地被淋滤 ,而难溶元素则相对富集。红土型金矿床就是在这样强烈的风化作用中由原生的金矿化带进一步富集而成 ,并可形成极富的矿体。金矿体常常赋存于风化壳的上部 ,易于露天开采。目前 ,在澳大利亚、巴西、巴布亚新几内亚、印度以及非洲的一些国家均发现了红土型金矿床。红土型风化剖面一般可分为 5个特征带 ,由上而下为 :表土带、铁质带、斑点带、浅色带、腐岩带 ,下面即为未风化的母岩 ,金矿体主要赋存于铁质带和斑点带中。红土型风化壳厚度变化很大 ,薄则几米 ,厚可达数百米。金在风化过程中往往向矿化带两侧运移 ,矿体常呈上宽下窄状。次生金常呈自形晶、树枝晶、浑圆状及不规则状产出 ,并常常与铁质结核共生。一般地说 ,次生金的成色很高 ,因为红土型风化作用常常是在氧化并且酸性的地球化学环境中进行 ,金和银主要以氯化物的形式运移 ,局部地球化学环境的变化可导致金的沉淀 ,而银的氯化物则较稳定 ,?     

Rosia Poieni copper deposit,Apuseni Mountains,Romania: advanced argillic overprint of a porphyry system

The Rosia Poieni deposit is the largest porphyry copper deposit in the Apuseni Mountains, Romania. Hydrothermal alteration and mineralization are related to the Middle Miocene emplacement of a subvolcanic body, the Fundoaia microdiorite. Zonation of the alteration associated with the porphyry copper deposit is recognized from the deep and central part of the porphyritic intrusion towards shallower and outer portions. Four alteration types have been distinguished: potassic, phyllic, advanced argillic, and propylitic. Potassic alteration affects mainly the Fundoaia subvolcanic body. The andesitic host rocks are altered only in the immediate contact zone with the Fundoaia intrusion. Mg-biotite and K-feldspar are the main alteration minerals of the potassic assemblage, accompanied by ubiquitous quartz; chlorite, and anhydrite are also present. Magnetite, pyrite, chalcopyrite and minor bornite, are associated with this alteration. Phyllic alteration has overprinted the margin of the potassic zone, and formed peripheral to it. It is characterized by the replacement of almost all early minerals by abundant quartz, phengite, illite, variable amounts of illite-smectite mixed-layer minerals, minor smectite, and kaolinite. Pyrite is abundant and represents the main sulfide in this alteration zone. Advanced argillic alteration affects the upper part of the volcanic structure. The mineral assemblage comprises alunite, kaolinite, dickite, pyrophyllite, diaspore, aluminium-phosphate-sulphate minerals (woodhouseite-svanbergite series), zunyite, minamyite, pyrite, and enargite (luzonite). Alunite forms well-developed crystals. Veins with enargite (luzonite) and pyrite in a gangue of quartz, pyrophyllite and diaspore, are present within and around the subvolcanic intrusion. This alteration type is partially controlled by fractures. A zonal distribution of alteration minerals is observed from the centre of fractures outwards with: (1) vuggy quartz; (2) quartz + alunite; (3) quartz + kaolinite ± alunite and, in the deeper part of the argillic zone, quartz + pyrophyllite + diaspore; (4) illite + illite-smectite mixed-layer minerals ± kaolinite ± alunite, and e) chlorite + albite + epidote. Propylitic alteration is present distal to all other alteration types and consists of chlorite, epidote, albite, and carbonates. Mineral parageneses, mineral stability fields, and alteration mineral geothermometers indicate that the different alteration assemblages are the result of changes in both fluid composition and temperature of the system. The alteration minerals reflect cooling of the hydrothermal system from >400 °C (biotite), to 300–200 °C (chlorite and illite in veinlets) and to lower temperatures of kaolinite, illite-smectite mixed layers, and smectite crystallization. Hydrothermal alteration started with an extensive potassic zone in the central part of the system that passed laterally to the propylitic zone. It was followed by phyllic overprint of the early-altered rocks. Nearly barren advanced argillic alteration subsequently superimposed the upper levels of the porphyry copper alteration zones. The close spatial association between porphyry mineralization and advanced argillic alteration suggests that they are genetically part of the same magmatic-hydrothermal system that includes a porphyry intrusion at depth and an epithermal environment of the advanced argillic type near the surface.Editorial handling: B. Lehmann     

藏东芒康县巴达铜金矿床地质特征及找矿方向研究

巴达铜金矿位于藏东富碱斑岩带南段,是藏东地区近年来新发现的大型铜金矿。虽然对巴达铜金矿开展了大量勘查工作,但对该矿床的成因尚未取得共识。本文基于详细的野外调研、岩心与坑道编录及系统的镜下鉴定,对巴达铜金矿床地质特征进行研究。巴达矿床主要产于石英二长斑岩中,局部产于斑岩和砂岩地层的接触带内。矿床发育的围岩蚀变主要为青磐岩化、钾化、绢英岩化,高岭土化、蛋白石化、蒙脱石化次之,蚀变分带从内向外依次为钾硅酸盐化带、绢英岩化带、青磐岩化带、高岭土化带,铜金矿体主要赋存于钾硅酸盐化和绢英岩化带内,铜矿化主要以黄铜矿形式产出,金矿化主要以银金矿形式产于白云石±石英+细粒黄铁矿±黄铜矿脉中,铜矿化与金矿化呈正相关,矿体的产出受北西向逆冲断层的控制。与典型斑岩和浅成低温热液矿床不同,巴达铜金矿化主要产于白云石±石英+黄铁矿脉中;矿床内既发育碳酸盐、伊利石、绢云母和黄铁矿、黄铜矿、方铅矿、黝铜矿、低FeS闪锌矿等一套中硫型浅成低温热液矿床的蚀变矿物组合,又发育符合碱性斑岩系统的特征矿物赤铁矿。基于以上特征判断,巴达铜金矿矿床成因类型应为与富碱斑岩有关的浅成低温热液矿床,巴达铜金矿矿床成因的厘定,为下一步找矿提供了理论指导。     

The Los Pijiguaos bauxite deposit (Venezuela): A compilation of field data and implications for the bauxitization process

Chemical, mineralogical, and petrographic data from the Los Pijiguaos bauxite deposit, together with the water chemistry of the streams draining the area, were used to study the problem of lateritic bauxite formation at this location. The Los Pijiguaos bauxite, located at the northwestern edge of the Guayana Shield in Venezuela, is a lateritic bauxite developed on a Precambrian Rapakivi Granite Batholith, the Parguaza Granite. This deposit is situated on a planation surface at elevations between 600 and 700 m; it is believed to have originated during an erosional event that took place during Late Cretaceous-early Tertiary times.The weathering profile is composed of an upper bauxite zone, followed by a saprolite, and merging gradually to the fresh granite. The upper bauxitic zone contains gibbsite, quartz, hematite, and goethite. The saprolite contains kaolinite, quartz, and goethite and is characterized by a relict granitic texture that indicates little bulk volume change associated with the weathering process. The upper bauxitic zone has lost any textural resemblance with the parent granite, consistent with extensive volume loss.Bauxite and saprolite are separated by a transition zone where gibbsite and kaolinite coexist. Textures indicating the replacement of kaolinite by gibbsite point to the dynamic nature of the weathering profile, characterized by advancing reaction fronts.The chemical composition of the deposit defines trends that can be traced back to the composition of the parent granite and shows enrichment of Al₂O₃, Fe₂O₃, and TiO₂, and depletion of SiO₂, relative to the parent granite. The uppermost part of the profile is characterized by a further enrichment of Fe₂O₃ with respect to the other components of the bauxite. Important volume and mass losses in the bauxite have also been calculated, based on chemical composition and density measurements. The calculated losses are consistent with the textural observations in the bauxite.The chemical composition of the waters of streams draining the area shows strong seasonal patterns, consistent with the seasonal nature of the local climate (one dry and one rainy season per year, both about six months long). The balance between dissolved and suspended loads in these streams indicates that the magnitudes of chemical and physical denudation are similar, leading to approximately constant thicknesses of the weathering profiles. These observations are consistent with model calculations based on current climatic conditions and suggest that the bauxitization process is still active.     

广西合浦新屋面高岭石矿物学特征及其形成途径

在野外实地考察的基础上,结合X射线衍射、扫描电镜(SEM)、化学成分分析等测试技术,对广西合浦新屋面高岭土矿床的风化物进行了研究。X射线衍射分析表明,黏土矿物主要为高岭石、伊利石、石英、正长石及斜长石。高岭石结晶度在0.489～1.210之间,随着深度的逐渐减小,高岭石逐渐增多,长石逐渐减少,高岭石的结晶程度则呈现变好的趋势,反映出花岗岩中原生矿物高岭土化程度逐渐加强。SEM结果表明,随着风化程度的加强,高岭石发育越来越好,晶形越来越完整。化学成分分析显示w(Al2O3)和w(K2O)互为消长关系,且随着深度的增大,Al2O3逐渐减少,K2O逐渐增多。该区长石蚀变为高岭土,可以经由绢云母中间阶段再转变形成高岭石和直接转变形成高岭石这两个途径。     

四川乡城108沟铜矿地质特征与矿床成因初析

108沟铜矿位于西南三江有色、责金属成矿带中段乡城茶拥当卓-稻城铅锌银铜区成矿带北部。铜矿体呈脉状赋存于马熊沟一次林措复式花岗岩带旁侧的三叠系上统拉纳山组变质砂板岩中,受断层破碎带、层间破碎带控制。矿化以热液充填为主,围岩蚀变主要有硅化,次为绢云母化、绿泥石化、碳酸盐化和黄铁矿化,富集程度与硅化成正比。矿床成因属与花岗岩有关的中低温热液型铜矿。     

基于红外光谱技术研究云南普朗斑岩铜矿的蚀变和矿化特征

近年来红外光谱技术作为一种绿色、快速、无损、精确探测矿物的技术手段而倍受关注,针对斑岩型矿床蚀变矿物高度叠加、蚀变分带界线不明显、细粒蚀变矿物多、黏土蚀变矿物多等特征,该技术在蚀变矿物识别和勘探信息解读等方面优势突出。本文应用红外光谱技术对云南普朗斑岩铜矿区钻孔ZK1801岩心进行矿物识别和蚀变分带划分的研究,识别出钾硅酸盐化带、绿帘石-绿泥石化带、绿泥石-伊利石化带、石英-伊利石化带和泥化带。研究表明:普朗铜矿整个钻孔的蚀变矿物主要有石英、钾长石、绢云母、绿泥石、绿帘石、高岭石、蒙脱石、伊利石等;根据矿化特征,发现铜矿体广泛赋存在钾硅酸盐化带和绿帘石-绿泥石化带中,与矿化关系密切的蚀变矿物"石英+钾长石+绢云母"和"绿帘石+绿泥石",可以作为普朗矿床勘查的标型蚀变矿物组合;研究区广泛发育的绢云母Al—OH波长随钻孔深度增加而逐渐从2210～2205nm减小到2202～2198nm, Al—OH波长2210～2205nm(长波绢云母)与矿化关系密切,可以作为普朗矿床勘查的指示信息。