贵州大竹园铝土矿矿床地质特征及控矿因素分析

发布时间：2018-03-29 15:24

本文选题：大竹园铝土矿　切入点：地质特征　出处：《昆明理工大学》2015年硕士论文

【摘要】：铝土矿是以三水铝石、一水软铝石或一水硬铝石为主要矿物所组成的矿石的统称,是工业发展需要的重要矿产资源之一。贵州省铝土矿资源储量相对丰富,居全国第四位。大竹园铝土矿床位于贵州北部务正道地区,该地区铝土矿资源丰富,找矿勘查工作已全面开展。本论文研究工作在地质勘查和收集国内外相关文献资料的基础上,室内工作与野外工作相结合。在综合前人工作基础上,研究工作采用地质、物探、化学、遥感等多个学科技术手段,通过系统的矿床地质特征、矿物特征、地球物理和化学等方面的研究,探讨了大竹园铝土矿的矿床成因、成矿规律,提出了找矿标志,建立了成矿模式。大致来说,获得了以下的研究成果：(1)大竹园铝土矿矿区出露地层主要为下志留统韩家店群(S1hj),上石炭统黄龙组(C2h)、大竹园组(C2d),中、上二叠统和下三叠统夜郎组,茅草铺组及少量分布的第四系。(2)大竹园组(C2d)为本区铝土矿矿体唯一赋存层位,矿体产于栗园向斜北段东西两翼,为一呈层状、似层状产出的连续矿体。产状与地层产状基本一致,较为稳定。铝土矿分布上严格受到栗园向斜构造控制。(3)矿区内矿体厚度变化不大,属较稳定型,变化系数48.97%,厚度一般为1.22～4.18m,平均厚度为2.06m。(4)矿体A1203一般为41.05～79.49%,平均为63.99%,变化系数为10.54%,品位变化属较稳定型。(5)矿区铝土矿矿石矿物组成较简单,一水硬铝石是其主要矿石矿物,矿石主要为碎屑结构、泥晶结构、粉晶结构和豆鲕结构等,主要构造为半土状构造和块状构造。(6)矿床形成于滨海沼泽沉积环境,矿床成因属古风化壳沉积型。成矿物质来源主要是韩家店群(S1hj)泥页岩,另有少部分来自为上石炭统黄龙组(C2h)灰岩。
[Abstract]:Bauxite is a kind of ore composed of bauxite, bauxite or bauxite, which is one of the important mineral resources needed for industrial development. Dazhuyuan bauxite deposit is located in Wuzheng Road area in northern Guizhou, which is rich in bauxite resources. The research work of this paper is based on geological exploration and collection of relevant documents at home and abroad, and combines indoor work with field work. On the basis of synthesizing the previous work, the research work adopts geology and geophysical exploration. Based on the systematic study of geological characteristics, mineral characteristics, geophysics and chemistry of the bauxite deposits in Dazhuyuan, this paper discusses the genesis and metallogenic regularity of the bauxite deposits in Dazhuyuan, and puts forward the prospecting criteria. A metallogenic model has been established. In general, the following research results have been obtained: 1) the exposed strata of the Dazhuyuan bauxite ore area are mainly the Lower Silurian Hanjiadian Group, the Upper Carboniferous Huanglong formation, the Upper Carboniferous Huanglong formation, the Upper Carboniferous Huanglong formation, the Dazhuyuan formation, the Dazhuyuan formation, the Middle, Upper Permian and the Lower Triassic Nilang formation, The Maocaopu formation and a small amount of Quaternary, Dazhuyuan formation (C2d) are the only deposit of bauxite ore body in this area. The orebody occurs in the east and west flanks of the northern segment of the Liyuan syncline, and is layered. The occurrence of bauxite is basically consistent with stratigraphic occurrence and relatively stable. The distribution of bauxite is strictly controlled by the Liyuan syncline structure. The variation coefficient is 48.97, the thickness is 1.22 ~ 4.18 m, and the average thickness is 2.06 路m ~ (4) the ore body A1203 is generally 41.05 ~ 79.49, the average is 63.99, the coefficient of variation is 10.54, the grade change belongs to a more stable type of bauxite ore, the mineral composition of bauxite ore is relatively simple, and the bauxite is the main ore mineral. The ore is mainly composed of clastic structure, mud crystal structure, powder crystal structure and soybean oolitic structure. The ore is mainly formed in the coastal swamp sedimentary environment. The ore deposit belongs to the sedimentary type of paleo-weathering crust. The ore-forming material is mainly from the Han Jiadian group (S1hj) shale, and a few from the Upper Carboniferous Huanglong formation (C _ 2h) limestone.
【学位授予单位】：昆明理工大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：P618.45

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