甘肃礼县金山金矿床品位变化特征及其找矿预测  

GOLD GRADE VARIATION AND IT'S FORECAST FOR PROSPECTING IN THE JINSHAN GOLD DEPOSIT, LIXIAN COUNTY, GANSU PROVINCE

作　　者：吴辉[1] 段焕春[2] 汪树栋[3] 李鸣凤 康利祥 

机构地区：[1]甘肃有色地质勘查局三队,白银730900 [2]华北地质勘查局 [3]有色金属矿产地质调查中心,北京100814 [4]华北地质勘查局综合普查大队,燕郊065201

出　　处：《地质与勘探》2006年第2期19-23,共5页Geology and Exploration

摘　　要：通过对金山金矿床地质特征的研究，发现金矿体深部向东侧伏，指出主矿体品位在走向上具明显的近等间距变富现象，变富距在220—240m之间；金矿体品位呈波状变化，其波峰的侧伏角为35°，矿体向深部品位有变富的趋势。根据矿床中稳定同位素、微量元素地球化学特征及矿床产出的空间位置、控矿构造条件等综合分析，该矿床属变质热液改造型层控矿床，中泥盆统李坝群是本区重要的金矿矿源层，该矿成因与中川等花岗岩体无直接关系，基于以上的认识，指出了金山金矿的找矿方向。By the study of geology in Jinshan gold deposit, a new discovery has been made that the lodes in the deep part of the deposit have the east lateral trend, and gold grades in main lodes vary from low to rich in the same interval in space. The intervals vary from 220 meter to 240 meter. The gold grades of ore bodies wave from lower to higher, at the waveg peak of gold grades, the lateral trend is about 35°, which indicates that along that direction downward, gold grades have tendency to get higher. The systematic studies of stable isotope, trace elements, gold precipitation sites and ore -controlling structures indicates that the deposit is a stratabound -type reformed by metamorphic fluids, and the middle Devonian -Liba group is an important gold source - bed, which has nothing to do with the Zhongchuan granitic pluton. A prospecting forecast has been made in the Jinshan gold deposit.

关 键 词：品位波状变化 地质特征 金山金矿 甘肃礼县 

分 类 号：P618.51[天文地球—矿床学]