【作者】 李洁兰；

【导师】 谷湘平；

【作者基本信息】 中南大学 ， 矿产普查与勘探， 2010， 硕士

【摘要】 广东鹿湖嶂锡多金属矿属于磁铁矿矽卡岩型锡矿床。本文在总结该矿床矿石结构构造、矿物组合等特征的基础上,通过化学多元素分析、光学显微镜观察、X射线衍射、X射线荧光分析及扫描电镜能谱分析等多种物理化学手段,查明了矽卡岩型富锡磁铁矿矿石中锡的赋存状态。(1)鹿湖嶂矿区的矿石主要化学成分为Si02、FeO、MgO、CaO、Al2O3、F、Sn,其中Sn、Fe已达工业品位。(2)矿石中主要的有用矿物成分有磁铁矿、锡石、硼钙锡矿、黑硼锡铁矿,脉石矿物主要为斜绿泥石、普通辉石、萤石、钙铝榴石等。矿石结构主要为包含结构、它形粒状结构及针状、放射状结构等,构造以块状构造和浸染状构造为主。(3)该矿区锡元素主要以锡石、硼钙锡矿及黑硼锡铁矿的形式存在。锡矿物粒度极细,一般在0.01-0.04mm之间,形态不规则。这些锡矿物主要嵌布于磁铁矿间隙,部分呈细粒包体分布于磁铁矿中,少量Sn呈类质同象分散在磁铁矿中。(4)锡矿物与磁铁矿复杂的嵌布关系及锡的硼酸盐矿物的存在是造成该矿床锡无法与磁铁矿分离、回收率低的根本原因。更多还原

【Abstract】 Lu Huzhang tin-polymetallic deposit is a magnetite skarn deposit. Through multi-elemental wet chemical analyses, optical microscopy, X-ray diffraction, X-ray fluorescence and SEM analysis, in addition to study of ore texture and structures, this thesis tried to investigate the distribution and existing status of tin in the ores of Luhuzhang tin-magnetite deposit of skarn type.(1) The main chemical components of the ores are SiO2、FeO、MgO、CaO、Al2O3、F、Sn, and the content of tin reach the industrial grade.(2) The principal constituent ore minerals are magnetite, cassiterite, nordenskioldine and hulsite. The gangue minerals are mainly clinochlore, augite, fluorite and essonite. The ore has poikilitic texture and xenomorphic granular structure; and has massive structure and impregnation structure.(3) Cassiterite, nordenskioldine and hulsite are the dominant tin carriers in this deposit. They are tiny-grained between 0.01-0.04 millimeters with irregular shapes. The tin minerals are distributed mainly as tiny grains in intergranular gaps of magnetite or as fine inclusions contained in magnetite, with a small part of tin as solid solution substitution in magnetite.(4) The incrustation between tin minerals and magnetite and the occurrence of borate minerals of tin accounts for the low recovery of tin and high difficulty of tin to be separated from magnetite in the ores.更多还原