共查询到20条相似文献，搜索用时 453 毫秒
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东南亚中南半岛位于特提斯成矿域和西环太平洋成矿域的相交地带,在印支—喜山期发生了多期次俯冲、碰撞造山成矿作用,发育多个与中酸性岩浆活动密切相关的锡(钨)岩浆热液成矿系统,形成了世界著名的东南亚中南半岛锡矿带。研究区自西向东依次可划分为抹谷—毛淡棉—德林达依—普吉锡矿带、景栋—清莱—清迈锡矿带和越北—长山—昆嵩—大叻锡矿带三大锡矿带及7个锡矿亚带,锡矿化花岗岩多为高度分异演化的重熔型铝过饱和花岗岩类,具有多硅、富碱、多挥发分、高钾、87Sr/86Sr初始比值高、Rb/Sr值高、相对明显富集Be、Bi、Cu、Mo、Pb、Sn、Y、Zn等元素的特点。锡矿体主要分布于S型花岗岩与围岩的内、外接触带。锡矿床成矿类型主要有热液脉型、矽卡岩型、锡石—硫化物型、云英岩型、伟晶岩—细晶岩型等。从海西晚期到喜山早期都有锡的成矿事件发生,以燕山期锡成矿作用为主,成矿构造环境主要为岛弧环境和大陆边缘碰撞造山环境。 相似文献
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华南地区中生代多金属矿床形成与地幔柱关系 总被引：22，自引：1，他引：21
华南地区中生代多金属矿床形成与地幔柱关系毛景文李红艳王登红彭聪（中国地质科学院矿床地质研究所,北京１０００３７）关键词多金属矿床地幔柱构造华南地区在华南地区,中生代有大量花岗质岩浆的侵位和成矿,形成了以柿竹园钨多金属矿床、大厂和个旧超大型锡多金属矿床... 相似文献
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Yang Shiyu 《中国地球化学学报》1991,10(1):21-35
Pneumato-hypothermal to meso-epithermal tin-polymetallic (W, Be, Bi, Mo, Cu, Pb, Zn and Ag) deposits, dominated by cassiterite-sulfide
type and cassiterite-quartz type, are extensively developed around granite intrusives in the Southeast Yunnan Tin Belt genetically
related to Yenshanian tecto-magmatism. The deposits are grouped into two classes, four associations and fourteen types according
to the classification scheme proposed by the author to reflect their geological and genetic characteristics as well as economic
implications. The deposits are arranged in an apparent zonal pattern from the granite body outwards in terms of “association”
(cassiterite-feldspar → cassiterite-quartz → cassiterite sulfide), typical ore-forming metals (Sn-W-Be-Mo-Nb-Ta-Tr → SnW-Cu-In
→ Sn-Pb-Zn-As-Cd), and formation conditions (pneumato-hypothermal → hypothermalmesothermal → mesothermal-epithermal), although
such distribution pattern may be more or less complicated by local specialities of granite petrochemistry, host rock lithology
and structure. 相似文献
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DC, a multi-metal ore field, is an important and well known producer of tin in China. Besides tin, also mined are zinc, lead, antimony, copper, arsenic, tungsten, mercury, silver and many other metals. Most of the deposits in this region occur in Devonian limestones and siliceous shales. The ore deposits in this field are predominated by cassiterite sulphide type. As to the origin of those deposits, they seem closely related to biotite granite. The ore-forming material is mainly derived from magmatic rocks, and part of it may come from the host rocks. The appearance of horizontal zoning of ore deposits in this field is extremely distinct, with LXG biotite granite as the core. Found in the magmatic rocks is molybdenum mineralization. From the biotite granite outwards there displays such an occurring sequence as the following: copper (zinc) skarn ore deposits, scheelite ore deposits, wolframite ore deposits, cassiterite sulphide ore deposits, lead-zinc (antimony) ore deposits and mercury or arsenic ore deposits. In this region the mineralizing-temperature zoning is also distinguishable, basically in agreement with the horizontal zoning of ore deposits. In other words, the formation temperature of ore deposits occurring around the granite is higher than that farther away from the granite. The following mineralization periods and stages can be divided: the first period, including skarn sub-stage, cassiterite-quartz sub-stage, cassiterite-sulphide sub-stage, cassiterite-calcite sub-stage; the second period, including ferrosphalerite (galena)-franckeite sub-stage, jamesonite-boulangerite sub-stage; and the third period, including pyrite-calcite sub-stage. The characters of material composition are as follows: ore minerals are characterized by great variety, perfect crystallinity, large grain-size and abundant sulfosalts. More than 90 species of minerals have been identified. What is more interesting is that lead and antimony in some of the cassiterite-sulfide deposits are derived from jamesonite rather than galena and stibnite, which provides an example rarely encountered in metallic deposits throughout the world. 相似文献
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Tin-polymetallic deposits, with a characteristic elemental association of Sn, Cu, Pb, Zn, Au, Ag and sometimes Fe, W and Mo,
are widespread in the Nanling region, South China. Like W-Sn-Nb-Ta-Be(REE) deposits, they are commonly associated with acid
granites. Therefore, it has long been considered that tin-bearing granitic magma derived from anatexis in the tin-rich belt
in the sial crust is the only source of primary tin mineralization, including the tin-polymetallic deposits discussed in this
paper. Genetically they are related to the continental crust-reworked (I-type and S-type) granites.
Based on geologic and geochemical features and, particularly, REE geochemical features, it is proposed that the granite bodies
related to tin-polymetallic deposits in this region are products of the derived acid magma generated by partial melting and
fractional crystallization from basaltic-andesitic rocks plus a small amount of sial rocks in the lower crust. 相似文献
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新疆东昆仑祁漫塔格东段区域化探成果显示,在该区近地表地质体中,Na2O?K2O?Sn?W?Bi?Be?U?Al2O3?Ba?SiO2?Pb?Th等元素相对富集,主成矿元素为W?Au?Bi?Sn?Nb?Pb?F等,经异常查证先后发现了白干湖钨锡矿?蟠龙峰铁多金属矿?维宝铅锌矿等;在本区以W?Sn 等为代表的高温元素的成矿作用与华力西期和加里东期岩浆侵入活动关系密切,印支期中酸性岩浆的侵入与区内Cu?Pb?Zn?Mo等中—高温元素的成矿作用具有较密切的关系,层控改造型Pb?Zn 矿床与蓟县系狼牙山组碳酸盐岩-细碎屑岩建造有关,而Au元素的成矿作用则与燕山期的岩浆活动有关? 相似文献
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锡铁山铅锌矿床为海底喷流沉积为主兼后期迭加改造的矿床.研究表明,矿体元素在纵向上从盆地边缘-近边缘-盆地中心-喷流口部位,出现由低温Hg、Sr、Ba、Cu-中低温Hg、Sr、Ba、B、Ag、Au、Mn、Cu、Pb、Zn-中高温Pb、Zn、Ag、Au、Cu、Sn、Bi、As-高温Cu、Bi（Pb、Zn）的分带,并且以喷流口为中心,两侧盆地呈对称状态.矿体垂向上晕的表现为Cu、Pb、Zn、Sn、Bi、As、Au等中高温元素紧裹着矿体,Co、Ni、Cr对称地分布在两侧,Ba（Hg）呈宽缘晕如帽式样分布在矿体前缘,为一种紧裹型镜相对称的帽式结构.元素轴向分带序列为（由上至下）：B-Ba-Hg-（Sr-Cr）-Ni-Cu-Zn-Au-Mo-Bi-As-Pb-Mn-Sn-Co-Ag-Sb-（Ni）,前缘晕元素为Ba、B、Hg、Sr,矿体尾部元素为Co、Ni、Cr.在此基础上建立了矿床综合地球化学异常模式及找矿评价指标. 相似文献
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普老地区Pb、Zn、Sn多金属异常区位于老挝北部长山成矿带,1∶5万水系沉积物地球化学测量发现了以Pb、Sn为主,伴生Zn、Ag、W、Sb、Bi、As、Hg、Cu、Au等元素异常。1∶1万土壤地球化学测量圈定了3个综合异常带,Pb、Zn、Sn等元素具有异常强度高、规模大、浓集中心明显的特点,经异常检查发现铅锌、锡多金属矿化点13处。研究和分析异常区元素的地球化学分布和异常特征,认为该区多金属异常为矿致异常,具有寻找热液型铅锌、锡及多金属矿的潜力。 相似文献
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山东招远前孙家金矿床地质和元素地球化学研究 总被引：6，自引：1，他引：5
对矿区地表和井下四个中段共采集地层、岩体、蚀变岩、石英脉和矿体样品503件,测试了Au、Ag、As、Sb、Cu、Pb、Zn、Sn、Bi、Mo、Co、Ni、Mn、Cr、V、Ti、Ba、Rb和Sr等19种元素的含量,运用Suffer软件编制了19种元素的矿脉地球化学纵剖面图,根据格里戈良分带指数法计算了元素的地球化学分带,建立了原生晕地球化学立体分带模式。综合地质地球化学资料分析得出以下认识：由花岗岩→钾长石化花岗岩→绢英岩化花岗岩→绢英岩→石英脉或硅化带→金矿石,随着蚀变作用增强,成矿元素Au、Ag、As、Cu、Pb、Bi、Mo、Sb增加,然而成矿作用主要发生在绢英岩化后的硅化阶段。矿区成矿元素Au、Ag、As、Cu、Pb、Sn、Bi、Mo、Co．Ni含量呈多峰分布,分布范围大,离散度大,其中Au、Ag高含量峰值区峰型突出,成矿富集趋势强烈。矿区成矿阶段可分为：石英-金-黄铁矿阶段、石英-金-多金属硫化物阶段和石英-碳酸盐阶段。F1因子（Au、Ag、As、Co、Ni、Sn、Bi）为主成矿阶段的元素组合,F3因子（Mo、Sb）和F5因子（Cu、Zn）反映了成矿热液活动的多期叠加。F4因子Rb、Sr、Ba组合在本区最具典型意义,Rb与Sr、Ba为对抗性元素,Sr、Ba、Ca低值带,Rb、K高值带恰好与Au、矩高值带吻合,显示花岗岩长石类矿物的钾长石化和绢云母化与成矿关系密切。与矿体的侧伏方向一致,总体上矿脉纵剖面地球化学高值带均向SW侧伏。其中Au、Ag高值带宽且比较连续,上下均未封闭,结合金矿体虽已出露地表但规模不大和原生晕分带特征,推测为一浅剥蚀矿床,向SW深部仍有一定延深。矿区原生晕分带序列自上而下为（Hg2、Sr、Ba、Rb）→（矩、Au、Sn、Mo、Cu→（Zn、Pb）→（Sb、Mn）→（Ni、V、Co、As、Hg1、Bi）。As、Sb、Hg高值带偏于中下部,可能指示下部隐伏矿体的存在。 相似文献
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P. Soler 《Mineralium Deposita》1987,22(2):135-143
About 1,500 samples of Pb and Zn concentrates and ores from 89 ore deposits of the polymetallic province of the Andes of central Peru have been analyzed. The distributions of Cd, In, Ge, Ga, Ag, Bi, Se, Hg, and Sn in these ore deposits can be reported on the basis of the typology of ore deposits, i.e., some types of ore deposits (syndiagenetic without associated volcanism and volcano-sedimentary of Triassic-Lias, exhalative sedimentary of Upper Jurassic) show very characteristic minor and trace element patterns; the temperature of ore formation that controls the abundance of Bi and Hg, in general, and of Ag, Se, and Sn in the Tertiary hydrothermal deposits; the age and nature of the country rock, e.g., an In, Ga, and Sn positive anomaly and Cd negative anomaly appears in the deposits with Paleozoic country rock; the geographic position of ore deposits, e.g., in the northern part of the province an In, Ga, Ge, and Cd positive anomaly appears. 相似文献
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对矿区地表至960m中段共计6个中段平面系统采集构造地球化学样品,共采集地层和构造蚀变岩样品184件,测试了Au、Ag、As、Sb、Cu、Pb、Zn、Sn、Mo、Mn、Co、Ni、Cr、V、Ti 15种微量元素的含量,编制了各元素地球化学纵剖面图和单个矿脉元素含量曲线图,综合地球化学图件分析法和格里戈良分带指数法确定了元素的纵向、横向和轴向分带序列,建立了原生晕地球化学三维分带模式。综合地质地球化学资料分析得到:硅化砂泥岩、构造蚀变岩中Au、As、Sb、Ag元素含量高,是地壳的数倍到数百倍,变异系数大,表明这些元素卷入了成矿作用,硅化泥岩是主要的富矿围岩,而矿体大部分赋存于由于成矿热液多期次强烈活动而形成的石英岩和构造角砾岩中。矿区原生晕轴向分带序列为:As、Pb、Mo、Sn、Cu、Au、Ag、Mn、Zn、Sb。与矿体北西向侧伏规律一致,矿区地球化学异常体亦具向北西侧伏的趋势。根据元素地球化学纵剖面图中主成矿元素异常高值带向下延伸未封闭,矿体向下未尖灭、特征前缘晕元素Sb和成矿晕元素Zn出现在矿尾晕等特征说明,矿体向下仍有一定的延伸,已知矿体北西侧深部是下一步找矿勘探的重点区域。 相似文献
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Mao Jingwen 《《地质学报》英文版》1989,2(2):175-187
Abstract This paper discusses the late Yanshanian-Himalayan igneous rock series and minerogenetic series (Cheng et al., 1979, 1982) related to tin polymetallic deposits in the Tengchong area. The multi-stage differentiation and evolution of the igneous rock series led to the concentration of metal and ore-forming elements in a cupola of a granite body formed in the late stage. The minerogenetic series shows a zoning of Nb-Ta-W-Sn, Sn-Fe and Sn around the cupola in space and a multi-stage regularity in time. Finally a minerogenetic model and three key factors of tin minerogenesis are put forward for tin polymetallic deposits in the area. 相似文献
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北山地区植被属戈壁荒漠植被类型，主要植物群落为红沙，红沙中多数元素特别是成矿元素及其伴生元素的含量和变化系数矿区大于背景区，元素含量背景区呈对数正态分布，矿区呈偏对数正态或多峰分布，红沙中的元素组合分类背景区为Au,Cu,Pb,Zn,As,Sb,Mo,V,Mn和Ag,Sn,Sr,Ba及Ti,Cr,Co,Ni,金矿区为Au,Ag,As,Sb,Mo,Mn,Sr和Cu,Pb,Zn,Sn,Ba及Co,Ni,Ti,V,Cr,铜矿区为Cu,Pb,Zn,Mo,Au,Ag,Ba和As,Sb,Sn,Mn及Ti,V,Cr,Co,Ni,Sr，矿区红沙中浓集系数较大的元素多数在矿区岩石中的浓集系统亦较大，金，铜矿床红沙和岩石中的特征元素分别都有Au,Ag,Ag,Sb,Mo,(Mn)和Cu,Pb,(Ba,Ti,Cr)。在金，铜矿床（体上方分别发育有良好的Au和Cu的生物地球化学异常和元素组合及分带，根据红沙的地球化学特征能，判断金或铜矿种类型，并能对掩埋，隐伏金，铜矿床（体）进行定位预测。 相似文献
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内蒙花敖包特Pb-Zn-Ag多金属矿床原生晕分带特征与深部矿体预测模型 总被引：4，自引：1，他引：3
花敖包特Pb-Zn-Ag多金属矿床构造上位于滨西太平洋成矿域内蒙古大兴安岭成矿带南段, 是一个近年来发现的与白垩纪早期构造岩浆活动有关的隐伏热液脉状矿床.研究表明: (1)矿体原生晕发育, 且分带明显.据其异常强度建立的元素横向分带顺序(从强到弱)为Cd→Pb→Zn→Ag→Sb→In→Hg→As→Cu→Sn→W→Mo→Bi, 排在序列前面的Cd、Pb、Zn、Sb、Ag等5种元素, 可作为远矿指示元素; 排在序列后端的As、Bi、Mo、W等4种元素, 可作为近矿指示元素.(2)根据Grigorian原生晕分带计算方法, 获得矿体原生晕轴向分带序列(自矿体头部至尾部)为Sb→Pb→Cd→Ag→Zn→Hg→Cu→In→As→Bi→Sn→Mo→W, 与Grigorian建立热液矿床标准分带基本一致.(3)构建深部矿体找矿模型, 其预测评价指标(Sb×Pb×Cd×Ag)D/(As×Sn×Mo×W)D在矿体头部为1.30、矿体中上部为0.35、矿体中下部为0.056、矿体尾部为0.005, 这表明该指标随深度的增加有规律地降低, 是预测深部矿体资源潜力的有效指标. 相似文献
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西藏柯月Pb-Zn-Sb-Ag多金属矿床位于雅鲁藏布江缝合带（IYS）与藏南拆离系（STDS）之间的北喜马拉雅成矿带。该矿床经详查验证,4 300 m以浅的矿体赋存于日当组钙质板岩夹薄层泥晶灰岩中,严格受北东向断裂控制,但深部延伸不明。本文通过该矿床I号矿体原生晕地球化学特征分析,对此问题进行初步探讨。研究表明,前缘晕元素为Hg、As、Tl,近矿晕元素为Pb、Zn、Sb、Ag、Au、Cd、Cu、Mn,尾晕元素为Sn、In、Bi;采用改良的格里戈良分带指数法计算分带序列为In-Mn-As-Cu-Zn-Cd-Bi-Pb-Sn-Hg-Tl-Ag-Au-Sb,重心法计算分带序列为In-Mn-As-Cu-Cd-Zn-Hg-Bi-Sn-Pb-Ag-Sb-Tl-Au;同时,讨论原生晕地球化学参数变化规律,并以各元素的几何平均值累乘比建立矿体的剥蚀参数模型及矿体原生晕叠加理想模型。综合以上分析,推测矿床有多次成矿作用叠加,上部存在剥蚀至尾部的矿体,而深部可能有矿体延伸。 相似文献
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大义山岩体型锡矿产于汤市铺超单元的晚期介头单元（J2J)，品位中等偏低，易选，规模大，形成于局限封闭环境，具垂直分带。区域性构造，岩浆岩，围岩及局限环境联合控制了岩体型锡矿的产出及规模，笔者分析研究了岩体型锡矿的成因；岩浆在局限环境下分异演化。成矿元素不均匀分配，使介头单元侵入体富含W,Sn，在侵入体前峰或上拱部位形成岩体型锡矿的理想成矿模式和岩体型锡矿床垂向上由上而下，具由高温至低温的蚀变与矿化分带特征。 相似文献