The Central Africa copper-cobalt metallogenic belt is the world’s biggest sedimentary copper-cobalt metallogenic belt, the world’s largest cobalt deposit, and the third greatest discovery area for copper deposits. Because copper and cobalt prices are rising and there is an urgent need for Chinese enterprises to pay attention, this work analyzed and studied the geological characteristics of the Central Africa copper-cobalt metallogenic belt, the distribution law of copper and cobalt deposit resources, and the amount of equity resources.This paper systematically collects data such as academic research results, commercial databases, and enterprise annual reports. Meantime, we compiled data in a methodical manner, such as academic research findings, commercial databases, and corporate annual reports. The tectonic background of the Central Africa copper-cobalt metallogenic belt, according to the research, is the Lufilian arc-shaped structural belt. It is separated into the outer arc fold nappe belt, the dome area, the compound syncline zone, and the Katanga Plateau from north to south. The strata are classified as Kundelungu, Nguba, and Roan qroups, with the ages spanning from ＜573±5 to 879±16 Ma. The ore-bearing horizon is mainly the Roan Group Mines Formation, which is divided into R2.1,R2.2,and R2.3 ore-bearing horizons. The deposit types include mostly Carbonate giant breccia, ore-bearing shale, ore-bearing sandstone, and ore-bearing basement copper deposits, which comprise six copper-cobalt ore concentration zones with equidistant distribution characteristics separated by 20 km. By 2021,the study area had discovered 191 million tons of copper and 14.04 million tons of cobalt.According to the order of equivalent copper resources, there are 33 deposits more than one million tons and seven deposits greater than ten million tons. The discovery and development of the copper-cobalt metallogenic belt has involved 55 mining companies from 14 countries. China has 64.67 million tons of equity copper and 6.48 million tons of equity cobalt resources. Ten companies have more than 500,000 tons of equity copper resources, including COMC,Zijin Mining, and CNMC. Also, ten companies have more than 20,000 tons of equity cobalt resources, including COMC,CATL and CNMC.
山东省蒙阴县蒙山北部地区麦饭石矿产资源品质好,且矿石开发利用已具有较大规模.为查明该区麦饭石全岩地球化学及麦饭石溶出和吸附特征,本文对研究区麦饭石岩相学和地质地球化学特征进行了分析研究.研究结果表明,蒙阴县蒙山北部地区麦饭石属钙碱性岩浆岩,其对人体的有益和有害元素的含量与地壳元素丰度值相当或略低.麦饭石的溶出和吸附特征表明,麦饭石能溶出有用组分偏硅酸(H2SiO3),并且含量均达到了天然饮用矿泉水的标准要求(≥25.00 mg/L),有益有害元素也均满足限量指标要求,溶出效果较好.麦饭石对有害元素Pb、Cd、Hg、As、Cr均具有较强的吸附作用,其中对Cd、Hg、Pb等元素吸附效果最好.本次研究为制定山东省麦饭石矿产地质勘查地方标准及开发利用提供科学依据.
为查明萤石矿的成因类型和成矿作用,研究选取陕西省商洛市西部的青岗萤石矿和玉石坡萤石矿,矿体分别赋存于曹坪岩体和沙河湾岩体中,达中型规模,受断裂构造控制.对赋矿花岗岩及萤石开展稀土元素地球化学研究,探究成矿过程,为矿区深边部和外围找矿突破提供依据.研究表明,研究区内至少存在两个成矿期次,赋矿岩浆岩可能为氟元素的主要来源.研究区萤石及赋矿花岗岩稀土元素均表现出LREE相对富集、HREE相对亏损特征,萤石LREE/HREE值介于1.88～10.70,δEu值范围为1.08～1.61(除一件为0.86外),δCe值范围为0.68～0.95.萤石矿形成环境为弱氧化环境,稀土元素及Fe、Cr等杂质含量变化是矿区内萤石致色变色的主要因素.因此,研究区萤石矿成因类型应为中低温热液型矿床,印支期后的构造热液活动是矿区主要的成矿作用.青岗萤石矿、玉石坡萤石矿沿走向和倾向还有继续扩大找矿的潜力,应加强地质工作,以期探获更大资源量.
藏东达翁金矿区位于班公湖-怒江成矿带东段,其成矿地质背景和成矿地质条件优越.为研究该矿区找矿潜力,利用SPSS软件对1∶10000土壤地球化学测量获得的Au、Ag、Cu、Pb、Zn、As、Sb、Mo、W、Bi等10种元素数据进行多元统计分析,运用元素异常NAP值累加方法和组合元素NAP值异常评序方法分别对各元素的成矿潜力及综合异常的找矿潜力进行评价.结果表明:区内矿化与中酸性岩浆热液有关,Pb、As、Sb、Ag、Bi是矿化体前缘晕指示元素,Au是主成矿元素,W是近矿指示元素,Cu、Mo是矿化体尾晕指示元素;Au的成矿潜力最大,Bi、Mo成矿潜力较大,Sb、Ag有一定的成矿潜力;区内共圈定土壤地球化学综合异常5个,其中HS-1综合异常找矿潜力最大,其次是HS-4综合异常.结合成矿地质特征和异常查证结果认为,区内具有寻找隐爆角砾岩型金矿、斑岩型钼金矿的巨大潜力及热液型银锑铋多金属矿的较大潜力.
鄂西黄陵背斜地区虽已发现众多矿点,但是矿床规模较小,找矿潜力不明.由于区内植被茂盛、覆盖严重,致使地质异常信息被削弱或掩盖,对进一步找矿工作造成了严重干扰.本次研究使用成分数据分析和能谱-面积(S-A)分形模型识别与金矿化相关的异常,结果表明:(1)等距对数比(ILR)变换后的主成分分析结果相比对数(Log)变换更能够反应元素的共生组合规律,第一主成分(PC1)元素组合为Au-Cu-Ag,且Au元素占有最大的载荷,与金矿密切相关,PC1元素组合异常的分布模式与矿点的分布更加吻合;(2)S-A方法抑制了黄陵背斜区域水系沉积物的背景模式,增强了异常模式;(3)根据地质特征和以往勘查工作情况,圈定了三处找矿远景区,为该地区金矿下一步勘查工作提供了重要依据.
