摘要
区域地球化学勘探在地质找矿中具有显著的应用效果,可以充分利用多目标区域地球化学调查数据进行找矿预测.基于鄂东大别山地区多目标区域地球化学调查数据,系统分析表层土壤中54项指标的背景、分布及组合特征,然后重点圈定与矿产有关的多元素组合异常,并结合各组合异常区的地质背景及已有矿床特征,初步提出成矿预测区.结果表明,①与湖北省土壤背景值相比,研究区表层土壤中Ba、C1、Sr、CaO、Na2O等5项指标表现为强富集,La、P表现为富集,Be、Ce、F、Ga、Ge、Mn、Nb、Pb、Sc、Th、Ti、V、Y、Zn、Zr、SiO2、A12O3、TFe2O3、MgO、K2O、pH 等 21 项指标与之相当,Ag、Bi、Br、Cd、Co、Cr、Cu、I、Mo、N、Ni、Rb、S、Se、Sn、Tl、U、Corg、TC 等 19 项指标表现为贫乏,Au、As、B、Hg、Li、Sb、W等7项指标表现为极贫乏;②圈定多元素组合异常41处,其中与Au、Ag、As、Sb、Hg有关的组合异常13处,与Fe、Co、Ni、V、Ti有关的组合异常10处,与U、Th、Nb、Ce、La有关的组合异常8处,与W、Mo、Bi、Sn、Pb有关的组合异常10处;③初步提出10个成矿预测区,分别为宣化金银钨钼铅锌成矿预测区、新城金银铁重稀土成矿预测区、七里坪金银铜钼成矿预测区、华家河金银铅铁镍重晶石萤石成矿预测区、夏店钨钼铀成矿预测区、三河口银铁镍成矿预测区、三里畈金银铜铅重稀土成矿预测区、杨柳湾铜钼成矿预测区、南河铁铜钼成矿预测区、张榜金银铁铜钼磷成矿预测区.研究成果可以为鄂东大别山地区开展下步找矿工作部署提供一定的参考.
Abstract
Regional geochemical exploration has significant application effect in geological prospecting,we should make full use of multi-purpose geochemical survey data for prospecting prediction.Based on the multi-purpose geochemical survey da-ta in the Dabie Mountains in eastern Hubei Province,the background,distribution and combination characteristics of 54 indicators in the surface soil were systematically analyzed,and then the multi-element combination anomalies related to minerals were delineated.Then,combined with the geological background of each combination anomaly area and the charac-teristics of existing deposits,the metallogenic prediction area was initially proposed.The results showed that:① Compared with the soil background value of Hubei Province,Ba,Cl,Sr,CaO and Na2O in the surface soil of the study area are strongly enriched,La and P are enriched,Be,Ce,F,Ga,Ge,Mn,Nb,Pb,Sc,Th,Ti,V,Y,Zn,Zr,SiO2,Al2O3,TFe2O3,MgO,K2O and pH are equivalent,Ag,Bi,Br,Cd,Co,Cr,Cu,I,Mo,N,Ni,Rb,S,Se,Sn,Tl,U,Corg and TC are poor,and Au,As,B,Hg,Li,Sb and W are extremely poor.(2)41 multi-element combination anomalies are delineated,including 13 combination anomalies related to Au,Ag,As,Sb and Hg,10 combination anomalies related to Fe,Co,Ni,V and Ti,8 combination anom-alies related to U,Th,Nb,Ce and La,and 10 combination anomalies related to W,Mo,Bi,Sn and Pb.(3)10 metallogenic prediction areas are preliminarily proposed,which are Xuanhua gold-silver-tungsten-molybdenum-lead-zinc metallogenic prediction area,Xincheng gold-silver-iron-heavy rare earth metallogenic prediction area,Qiliping gold-silver-copper-molyb-denum metallogenic prediction area,Huajiahe gold-silver-lead-iron-nickel barite fluorite metallogenic prediction area,Xiadi-an tungsten-molybdenum-uranium metallogenic prediction area,Sanhekou silver-iron-nickel metallogenic prediction area,Sanlifan gold-silver-copper-lead heavy rare earth metallogenic prediction area,Yangliuwan copper-molybdenum metallogenic prediction area,Nanhe iron-copper-molybdenum metallogenic prediction area,Zhangbang gold-silver-iron-copper-molybde-num-phosphorus metallogenic prediction area.The research results can provide some reference for the deployment of the next prospecting work in the Dabieshan area of eastern Hubei.
万方数据