广西桂平市锡基坑铅锌矿床地质特征及外围找矿潜力分析

1 矿区地质概况……………………………………………………………………………………2
本章小结……………………………………………………………………………………………2
2 矿床地质特征……………………………………………………………………………………4
2.1 赋矿地层………………………………………………………………………………………4 2.2 矿体特征………………………………………………………………………………………4 2.3 矿石特征………………………………………………………………………………………5 2.3.1 矿石化学成分特征…………………………………………………………………………5 2.3.2 矿石矿物成分………………………………………………………………………………6 2.3.3 矿石品位……………………………………………………………………………………6 2.3.4 矿石结构构造………………………………………………………………………………6 2.4 矿物生成顺序、矿化阶段及成矿期…………………………………………………………6 2.4.1 矿物生成顺序………………………………………………………………………………6 2.4.2 矿化阶段及成矿期…………………………………………………………………………6 2.5 围岩蚀变………………………………………………………………………………………6 2.6 找矿标志………………………………………………………………………………………6 2.6.1 直接标志……………………………………………………………………………………6 2.6.2 间接标志……………………………………………………………………………………7 本章小结……………………………………………………………………………………………7 3 矿区地球化学特征………………………………………………………………………………8 本章小结……………………………………………………………………………………………8 4 矿床成因…………………………………………………………………………………………9 4.1 硫同位素组成特征……………………………………………………………………………9 4.2 铅锌同位素特征………………………………………………………………………………9 4.3 成矿温度………………………………………………………………………………………9 4.4 控矿因素分析…………………………………………………………………………………10 4.4.1 构造控矿……………………………………………………………………………………10 4.4.2 层位控矿……………………………………………………………………………………10 本章小结……………………………………………………………………………………………10
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目次
摘要(中文)…………………………………………………………………………………………Ⅰ 摘要(英文)…………………………………………………………………………………………Ⅱ 目次…………………………………………………………………………………………………Ⅳ 引言………………………………………………………………metal mineralization in south, with GUI ping were stunning circle have GuDing GUI ping were stunning, tin pit periphery boat, GUI ping were stunning and flat four south into four official coscodl scenic spot. At present, in the perspective of medium size has found within the deposits are flat south officer, small size into pb-zn deposit deposit (point) dozen.
文章通过对矿床成矿规律、成矿地质条件、矿床地质特征进行了总结和分析，认为属 热水沉积＋构造热液叠加改造层控型矿床，指出具有相同成矿地质特征锡基坑外围具有寻 找中—大型规模铅锌矿床的找矿潜力。
关键词：找矿潜力；地质特征；成矿规律；锡基坑铅锌矿床；热水沉积＋构造热液叠加 改造层控型；广西桂平市
I
GENESIS AND PROSPECTING POTENTIAL OF GUIGANG PNGNAN PB ZN ORE FORMING ZONE,GUANGXI
Guangxi sixth in the 2004 ~ 2007 DeZhiDui out of zion, excavation periphery census new discoveries. Have already found superior qinfeng ferro, and such positions, small chamber.it pb-zn deposit and mines ".
There were a major devonian, carboniferous, cretaceous. Clay POTS of east hillock ridge under group formation exerted mainly through the area.
Deposit in 1959 ~ 1961 by guangxi bureau of geology and mineral resources of southeast guangxi 437 team and geologic integrated brigades census found, proven reserves of large scale. With a stable, orebody layer thickness, often with a multilayer output and mineralization is continuous and stable grade. Now, nine delineating ore deposits are mainly distributed in zion anticline axis and adjacent pit, orebodies interbeds and main ore-bearing layer is basically the same three layers. Most of the orebody is gentle, general 20 ° obliquity, belt, ore belt length, width 800m > > 1500m. A, near-bedded and lens. Pb, Zn + average grade average about 5.69 m thickness. Most huolulingjiao-pengwu, fine ores pulse shape, the structures. Metal mineral ore mainly for sphalerite and sulfur antimony lead, pyrite, magnetic pyrite galena, etc., mainly for non-metallic minerals dolomites, calcite and small barite.
1998～2000 年，中国地质调查局大调查项目《广西贵港—平南铅锌铜矿评价》，在贵 港—平南铅锌铜多金属成矿带上，圈出有桂平锡基坑外围、桂平古丁舟、桂平四德及平南 官成四大远景区。目前，在这些远景区内已发现达中型规模的矿床有平南官成铅锌矿床， 小型规模的矿床(点)多达十几处。
广西第六地质队于 2004～2007 年对锡基坑外围开展普查，获得新的发现。已发现有庆 丰、福禄、平硐、厚禄等多个小型铅锌矿床及矿点。
Keywords: ore-prospecting potential, Geological characteristics, Ore-forming regularity, Tin pit pb-zn deposit, Hot-water sedimentary hydrothermal superimposed + structure transformation stratabound type, Guangxi guigang
Based on metallogenic regularities, ore-forming geological conditions, geological characteristics were summarized and analyzed, think of hot-water sedimentary hydrothermal superimposed + structure reform that stratabound deposits, with the same ore-forming geological characteristics of foundation pit in zion for peripheral with large scale pb-zn deposit -- the ore-prospecting potential.
In 1998-2000, the China geological survey, the investigation of the project in southern lead-zinc deposit -- flat resource evaluation, in your flat - more than
广西桂平市锡基坑铅锌矿床地 质 特 征 及外围找矿潜力分析
郑星辉
（ 桂林工学院资源与环境工程系, 广西 桂林 541004 ）
摘要
桂平锡基坑铅锌矿床地处华南准地台大瑶山凸起南西段的大瑶山—龙山复式背斜之东 南翼。矿体多产出于背斜轴部及轴部邻近。区域性的凭祥—大黎、灵山—藤县深大断裂， 对本区起到控岩、控相、控矿作用。
出露地层主要有泥盆系、石炭系、白垩系。中泥盆统东岗岭组下段白云岩为矿区主要 的赋矿层位。
矿床于 1959～1961 年经广西地质矿产局 437 队及广西桂东南地质综合大队普查发现， 探明储量达大型规模。具有层位稳定，矿体厚度大，常呈多层产出，矿化较连续，品位稳 定等特征。目前已圈定 9 个铅锌矿体，矿体主要分布在锡基坑背斜轴部及邻近，矿体产状 与岩层产状基本一致，共 11 层，主矿层三层。大多数矿体较平缓，倾角一般 20°左右，成 带状展布，矿带长度＞1500m，宽＞800m。呈层状、似层状、透镜状产出。Pb+Zn 平均品位 4.32%，平均厚度 5.69m。矿石具浸染状、细脉状、条带状构造。矿石 中金属矿物主要为闪 锌矿、硫锑铅矿、方铅矿、黄铁矿、磁黄铁矿等，非金属矿物主要为白云石、方解石及少 量重晶石。
ZHENG Xing－Hui
( Guilin Research Institute of Geology for Mineral Resources,Guilin,Guangxi,541004 )
Abstract
Tin deposits is located in south China foundation platform must bump south of dayaoshan his-pei dayaoshan -- the south east longshan entry anticline. Orebody prolific of anticline axis and axis nearby. Regional pingxiang -- big li, lingshan -- in tengxian deep fault to have control of rock, control, ore-controlling role.