典型矿床深部盲矿预测的构造叠加晕实用模式

通过2个典型矿床的预测实例,阐述了构造叠加晕实用模式的特点和应用准则,使构造叠加晕法应用于深部盲矿找矿预测的思路更加清晰,方法便易操作,找矿效果更显著。构造叠加晕法只用于构造带内原生叠加晕轴向分带及叠加结构的研究,采样位置集中在构造带内热液叠加部位,大大减少了采样和样品加工分析的工作量,加大了预测深度,提高了盲矿预测的准确性。构造叠加晕实用模式是在构造叠加晕模式的基础上,突出了构造叠加晕法与成矿规律研究相结合开展找矿预测的新思路,具体步骤包括：研究已知矿体的赋存特点,从而确定有利的成矿空间;根据构造叠加晕实用模式和盲矿预测标志,判断有利成矿空间是否存在有盲矿。     

河北石湖金矿床101-4矿体构造叠加晕特征及找矿预测

针对石湖金矿床101-4矿体,通过在180 m中段以下坑道采集构造叠加晕样品,分析矿体深部地球化学元素组合特征.结果显示:As、Sb、Hg为典型头晕指示元素,Au、Ag、Cu、Pb为典型近矿晕指示元素,Mo、Co、Bi为典型尾晕指示元素;矿体轴向分带具有明显反分带特征,表明成矿、成晕特征具有明显叠加现象;101-4矿体...     

河南省洛宁县龙门店银矿床K9矿脉构造原生晕特征及深部预测

K9矿脉是龙门店银矿床主要矿脉之一,为探求其深部资源,应用构造原生晕法进行了深部预测。研究表明:成矿过程具有多期次叠加的特点,840 m标高矿体出现前缘晕指示元素叠加;矿脉自上而下构造原生晕轴向分带序列为W—Au—As—Pb—Hg—Mo—Zn—Bi—Ag—Sb—Cu,出现"前尾晕共存"和"反向分带"现象。依据矿脉构造原生晕特征,建立了K9矿脉构造原生晕叠加模型,并预测840 m标高以下存在盲矿体,具有较大的找矿潜力。     

河南下蒿坪金矿K_2矿体原生晕特征及深部成矿预测

下蒿坪金矿K2矿体受店房隐爆角砾岩边缘的环状构造控制,矿床具有明显的岩浆热液特征。对矿体的原生晕特征分析表明,Au、Ag、Cu、Pb、Zn相互之间有较好的相关性,W、Mo与其他元素的相关性均较差,因子分析反映出成矿过程具有多期次叠加特点。计算得到矿体的原生晕轴向分带序列由上到下为Mo-Au-Cu-As-Bi-W-Ag-Sb-Zn-Pb,出现头晕和尾晕元素叠加的"反向分带"特征。研究认为K2矿体具有上金下银的分带模式,预测在478 m标高以下具有较好的银成矿潜力。     

胡村南铜钼矿段90线剖面原生晕分带特征及深部矿体预测

胡村南铜钼矿段为一"矽卡岩型-斑岩型"复合型矿床,系统研究深部勘探钻孔岩芯所记录的地球化学信息,对深部成矿信息进行示踪和评价,可以为矿区深部与外围找矿提供参考依据。选择该矿床的90线剖面钻孔原生晕分带特征进行了系统研究,原生晕轴向分带序列为:Au-As-Zn-Pb-Sb–Hg-V-S-Sn-Mo-W-Bi-Ag–Cu(自上而下),显示尾晕元素(W和Bi)和前缘晕元素(Ag)共存的现象,且Cu异常位于尾晕元素后面,非正常分带。根据原生晕成矿预测可以推断,胡村铜钼矿段可能是多阶段叠加成矿及矿体在深部还有很大延伸。     

小秦岭大湖金矿矿体原生晕特征研究

矿床原生晕地球化学轴向分带是深部矿体预测的重要依据。研究表明:大湖金矿具有多期多阶段叠加成矿的特点,通过对大湖矿区F5构造带内的17、19、22号矿体及其蚀变围岩中Au、Ag、Co、Cu、Mn、Mo、Ni和Pb等18种元素含量进行相关分析和聚类分析,着重探讨矿体的原生晕特征,并以小秦岭金矿田构造叠加晕理想模型为参照,解释矿体的原生晕特征,进而开展成矿预测,以期为小秦岭金矿田其他矿区的深部找矿勘探提供参考。     

河南省河南庄金矿床Ⅱ号矿体原生晕特征与深部成矿预测

河南庄金矿床位于北秦岭构造带内,该构造带内成矿地质条件优越,具有较好的找矿潜力。Ⅱ号矿体为河南庄金矿床的主要矿体之一,为进一步探明其深部找矿潜力,针对Ⅱ号矿体进行了原生晕特征分析。结果表明:Ⅱ号矿体原生晕轴向分带序列为Pb-Zn-Au-Mo-Cu-Ag-As-Sb-Bi-W;前缘晕元素为As、Sb、Ag,近矿晕元素为Pb、Au、Zn、Cu,尾晕元素为Bi、Mo、W,元素分布较为混杂,呈现了明显的逆向分带特征,在矿体头部、中部、尾部均出现前缘晕和尾晕叠加现象,表明深部具有较好的成矿潜力。通过钻探工程查证,在Ⅱ号矿体深部对应位置探获矿体,表明通过原生晕方法找矿是可行的,可为矿区深部及周边矿床进一步找矿提供依据和借鉴。     

甘肃舟曲羊里尾沟金矿床原生晕特征及深部找矿预测

对羊里尾沟金矿床矿体集中分布的北西西向矿带7条勘探线27个钻孔采集了1223件样品,分析了Au等15种元素。元素的参数统计、因子分析结果表明,成矿元素及其指示元素Au、As、Sb、Hg明显富集,并且为中低温热液矿床中常见的低温元素组合。依据元素分带指数计算建立的矿区原生晕叠加轴向(垂直)分带序列为Hg-As-Sb(前缘晕)→Au-W-Zn-Co-Bi(近矿晕)→Cr-Ni-Sn-Mo-Ag-Pb-Cu(尾晕),并发育较强的尾晕与前缘晕叠加,与矿体沿走向和倾向呈尖灭再现的事实吻合。利用元素累乘比值和原生晕异常剖面,预测矿区深部有盲矿体存在。     

甘肃滴水山金矿床原生晕特征及深部成矿预测

滴水山金矿床是一个主要赋存于滨海—浅海相中酸性火山碎屑岩中,与脆—韧性剪切带有关的蚀变岩型金矿床。在野外地质工作的基础上,对Au2号矿体不同勘探线钻孔中所采样品进行微量元素分析,并利用地质和数学分析方法,对微量元素的空间分布特征、原生晕特征及元素组合特征进行了分析。结果表明:根据格里戈良分带指数法,141号勘探线原生晕轴向分带序列为(Pb-As)-Au-Cu-Zn-Bi-Hg-Sb-Ag-Mo,175号勘探线分带序列为(Hg-As-Au-Sb-Pb-Cu)-Zn-Mo-Ag-Bi,存在前缘晕、近矿晕、尾晕元素重叠的现象;通过相关分析、聚类分析和因子分析,认为Au2号矿体中与Au关系较密切的元素为Ag,其次为As和Sb,并确定了Au元素所在的F1主因子元素组合Sb-As-Ag-Cu-Au-(Pb-Zn)为成矿最有利的元素组合。根据元素分布特征,对深部成矿进行了预测,认为Au2号矿体深部仍有较好的成矿前景。     

广东梅子窝钨矿床59~#脉构造叠加晕研究

应用构造叠加晕理论,研究广东梅子窝石英脉型黑钨矿床59#矿脉的微量元素地球化学特征,确定成矿元素在矿区的背景值以及矿体不同部位的含量,得出单一成矿作用所形成的原生晕轴向分带序列为Sb、As(前缘晕)→W、Bi、Pb、Mn、Ag、Zn、Cu(近矿晕)→Be、Sn(尾晕),矿脉(由深到浅)原生晕轴向分带序列为Cu→Sn→Co→Be→Ag→As→Zn→Cd→Sb→Pb→Bi→Mo→Fe→Mn→W,建立了梅子窝钨矿床59#矿脉的构造叠加晕模式,并用此模型确定了盲矿预测的构造叠加晕标志,为深部矿脉以及矿区的深部找矿提供理论依据。     

China's Major Non-ferrous Metals Imports & Exports

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Zinc Production by Province in 2014

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80% of Chinese Firms Purchasing Overseas Mines Ended up in the Red

<正>Minmetals Resources acquired the world’s largest copper mine under construction for USD5.85 billion.One after another,listed companies Jien Nickle,China Molybdenum and Chihong Zinc and Germanium raised money to get involved in overseas mining projects…SOEs and private enterprises are engaged in a frenzy of overseas mine purchasing.A reporter with Economic     

Copper Processing Profit Dropped Sharply,Copper Consumption Will Face Impact in the Second Half of the Year

正Judging from China’s copper consumption field,the biggest consumption unit is electric power,which accounts for 47%of total consumption;it is followed by light industry sector,including household electrical appliance,machinery,durable goods and hardware etc,which accounts for 22%of total consumption;followed by transportation field,     

Central Geological Prospecting Fund Newly Added 16.47 Million Tonnes of Bauxite in 2013

正In 2013,the Central Geological Prospecting Fund(CGPF)Project newly discovered 15 ore fields,including 3 large above ore fields,and 5medium sized ore fields.The reporter learned from the recently published"Annual Report of Central Geological Prospecting Fund Project(2013)"that,from 2006 to 2013 the CGPF     

Manufacturers of Copper Tube for Central Air Conditioner Use Face Mounting Pressure in the Final Quarter of the Year

正This year,the investment growth rate of real estate industry continued to slow down,sold area of commercial housing also dropped significantly,which brought huge pressure to the domestic air conditioning manufactures.In the first half of the year,by relying on high growth in national financial expenditure,along with investment in public infrastructure     

Xinjiang Ranks No.1 in Production of Primary Aluminum in China

正Kang Yi,Honorary Chairman of China Nonferrous Metals Industry Association,said recently at the Forum on Development of the Non-ferrous Metals Industry in Central and Western China held in Zhengzhou that,as more and more electrolytic aluminum factories in Xinjiang came into operation,the electrolytic aluminum output of Xinjiang had reached2,275,000 tons in the first 7 months this year,     

Shenhuo Coal Industry and Electricity Power Completed800,000 t/a Aluminum Project in Xinjiang

正"Xinjiang project has been completed according to schedule,but total completion and total start of production are two different concepts,after completion it still needs a gradual process of reaching production target."On the morning of November 3,Shenhuo Coal Industry and Electricity Power told investors the above statement on the investor interaction platform.     

Guangdong Metal Transaction Center has Become the Second Largest Precious Metal Transaction Platform Nationwide

正The reporter learned from Guangdong Province Precious Metal Transaction Center that in 2013the Center maintained healthy development momentum,and had become the second largest precious metal transaction platform in China in terms of market size;currently Guangdong is quickening steps of financial innovation for the Center,aiming to build a transaction center with international core competitiveness.     

Seven Rare Earth Projects Involving Close to 3 Billion Yuan Investment Landed In the HighTech Zone

正On May 22,Baotou Rare Earth Industry Cooperation Consultation MeetingProject Agreement-signing Ceremony was held in Ningbo,nearly 40 enterprises from Ningbo,Guangdong,Hunan,and Shanxi participated in project consultation.After multi-lateral communication,agreements were signed for a total of 7 rare earth projects successfully.