大红山矿区二道河铁矿床地质特征及成因分析  

Geological Characteristics and Genesis Analysis of Erdaohe Iron Deposit in Dahongshan Mining Area

作　　者：付文春 黄金龙 保增志 邱成府 FU Wenchun;HUANG Jinlong;BAO Zengzhi;QIU Chengfu(Southwest Nonferrous Kunming Exploration Surveying and Designing(Institute)Inc.;Land Space Survey and Monitoring Institute of Hunan Province)

机构地区：[1]西南有色昆明勘测设计(院)股份有限公司 [2]湖南省国土空间调查监测所

出　　处：《现代矿业》2024年第4期46-50,共5页Modern Mining

摘　　要：在二道河铁矿矿权内实施了钻探、坑探、取样、水工环地质调查等地质工作,对矿床进行了系统的揭露和控制。通过对各项勘察结果的综合分析,认为二道河铁矿床含矿地层为大红山群红山组地层,含矿围岩为变钠质熔岩,矿体产状和地层产状具有明显的相似性。矿体呈现上缓下陡的特征,厚度变化属复杂型,矿体内部结构复杂程度属中等型。该矿床属海底火山沉积-变质改造型矿床,即由海底火山喷流作用形成,且受后期变质改造富集作用而形成矿床。认为辉绿岩侵入体对二道河铁矿成矿的贡献是双向的,既对成矿有利,又对形成的铁矿床有一定的破矿作用,但成矿效应大于破矿效应。Drilling,pit exploration,sampling,hydraulic ring geological survey and other geological work were carried out in the mining right of Erdaohe iron mine,and the deposit was systematically exposed and controlled.Based on the comprehensive analysis of the survey results,it is considered that the ore-bearing strata of the Erdaohe iron deposit are the Hongshan Formation of the Dahongshan Group,and the ore-bearing surrounding rock is the metamorphic sodium lava.The occurrence of the ore body and the formation are obviously similar.The ore body is characterized by slow up and steep down,the thickness change is com-plex,and the complexity of the internal structure of the ore body is medium.The deposit belongs to the submarine volcanic sedimentary-metamorphic transformation type deposit,which is formed by the submarine volcanic eruption and formed by the later metamorphic transformation and enrichment.It is considered that the contribution of diabase intrusion to the mineralization of Erdaohe iron deposit is two-way,which is not only beneficial to mineralization,but also has a certain ore-breaking effect on the formed iron deposit,but the metallogenic effect is greater than the ore-breaking effect.

关 键 词：二道河铁矿 矿体特征 矿床成因 侵入体 

分 类 号：P618.31[天文地球—矿床学]