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Geology and S-Pb isotope geochemistry of the Hatu gold deposit in West Junggar,NW China:Insights into ore genesis and metal source
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作者 Shen Han Zhenju Zhou +6 位作者 Xiaohua Deng Yanshuang Wu Xi Chen Abulimiti Aibai Yong Wang Xiaoyu Jia Yanjing Chen 《Acta Geochimica》 EI CAS CSCD 2024年第6期1205-1222,共18页
The Hatu gold deposit is the largest historical gold producer of the West Junggar,western China,with an Au reserve of about 62 t.The orebodies were controlled by NE-,EW-,and NW-trending subsidiary faults associated wi... The Hatu gold deposit is the largest historical gold producer of the West Junggar,western China,with an Au reserve of about 62 t.The orebodies were controlled by NE-,EW-,and NW-trending subsidiary faults associated with the Anqi fault.This deposit exhibits characteristics typical of a fault-controlled lode system,and the orebodies consist of auriferous quartz veins and altered wall rocks within Early Carboniferous volcano-sedimentary rocks.Three stages of mineralization have been identified in the Hatu gold deposit:the early pyrite-albite-quartz stage,the middle polymetallic sulfides-ankerite-quartz stage,and late quartz-calcite stage.The sulfur isotopic values of pyrite and arsenopyrite vary in a narrow range from-0.8‰to1.3‰and an average of 0.4‰,the near-zeroδ~(34)S values implicate the thorough homogenization of the sulfur isotopes during the metamorphic dehydration of the Early Carboniferous volcano-sedimentary rocks.Lead isotopic results of pyrite and arsenopyrite(^(206)Pb/^(204)Pb=17.889-18.447,^(207)Pb/^(204)Pb=15.492-15.571,^(208)Pb/^(204)Pb=37.802-38.113)are clustered between orogenic and mantle/upper crust lines,indicating that the lead was mainly sourced from the hostrocks within the Early Carboniferous Tailegula Formation.The characteristics of S and Pb isotopes suggest that the ore-forming metals of the Hatu orogenic gold deposit are of metamorphogenic origin,associated with the continental collision between the Yili-Kazakhstan and Siberian plates during the Late Carboniferous. 展开更多
关键词 Hatu gold deposit Sulfur isotope Lead isotope Orogenic gold deposit West Junggar
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Process mineralogy characteristics of acid leaching residue produced in low-temperature roasting-acid leaching pretreatment process of refractory gold concentrates 被引量:8
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作者 Shuang-hua Zhang Ya-jie Zheng +3 位作者 Pan Cao Chao-hui Li Shen-zhi Lai Xing-jun Wang 《International Journal of Minerals,Metallurgy and Materials》 SCIE EI CAS CSCD 2018年第10期1132-1139,共8页
To provide a theoretical basis for a suitable process to extract gold from refractory gold concentrates, process mineralogy on the acid leaching residue of gold calcine was studied by chemical composition, X-ray diffr... To provide a theoretical basis for a suitable process to extract gold from refractory gold concentrates, process mineralogy on the acid leaching residue of gold calcine was studied by chemical composition, X-ray diffraction, scanning electron microscopy-energy spectrum, and mineral dissociation analysis. The results showed that the acid leaching residue contained Au 68.22 g/t, Ag 92.71 g/t, Fe 0.44%, As 0.10%, and S 0.55%. Gold and silver minerals existed as native gold, argentite, and proustite. Quartz, the main gangue mineral, accounted for 78.33 wt/%. The dissociation degree analysis showed that the proportions of monomer and exposed gold in acid leaching residue were 96.66 wt%. The cyanidation results showed that the cyanide gold leaching rate of acid leaching residues was close to 100 wt%. However, the maximum cyanide gold leaching rate of gold calcine was only 85.31 wt%. This suggests that acid leaching can increase the gold dissolution rate in the cyanide process. 展开更多
关键词 acid LEACHING RESIDUE ROASTING process MINERALOGY precious metals OCCURRENCE STATES
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Differences of cyanide leaching between calcine and dust from refractory gold concentrates 被引量:5
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作者 Pan CAO Shang-hua ZHANG +4 位作者 Ya-jie ZHENG Han-bing HE Shen-zhi LAI Xing-jun WANG Bing TAN 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2020年第7期1964-1979,共16页
Differences of cyanide leaching between the calcine and the dust from a refractory gold concentrate were investigated by comparative method. Results showed that gold leaching efficiencies of the calcine and the dust w... Differences of cyanide leaching between the calcine and the dust from a refractory gold concentrate were investigated by comparative method. Results showed that gold leaching efficiencies of the calcine and the dust were 85.31% and 54.30%, respectively, with direct cyanidation. Contents and existing forms of arsenic and carbon were the main reasons for those differences. The maximum gold leaching efficiencies of the calcine and the dust were 87.70% and 58.60%, respectively, with cyanidation after NaOH pre-leaching. Harmful elements removal, gold loss in NaOH pre-leaching and iron oxides hindrance codetermined gold leaching efficiencies of the calcine and the dust. After H2SO4 pre-leaching, the maximum gold leaching efficiencies of the calcine and the dust achieved 94.96% and 80.40%, respectively. The effect of carbonaceous matter was the main reason for differences for leaching efficiencies of the calcine and the dust. Based on those differences, two proper gold extraction processes were put forward, and gold leaching efficiencies for the calcine and the dust achieved 94.91% and 91.90%, respectively. 展开更多
关键词 refractory gold concentrate CALCINE DUST CYANIDATION carbonaceous matter
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某高砷含碳低品位难选金矿浮选试验研究 被引量:13
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作者 姚兰星 王毓华 +2 位作者 何建璋 马永义 卢东方 《矿冶工程》 CAS CSCD 北大核心 2018年第2期38-42,共5页
对某高砷含碳低品位难选金矿进行了浮选试验研究。采用碳酸钠和水玻璃为调整剂,实现了矿泥分散和脉石矿物的选择性抑制;采用Y89-0为捕收剂,实现了对载金矿物(黄铁矿和砷黄铁矿)的选择性捕收。在磨矿细度-0.074 mm粒级占80%条件下,采用... 对某高砷含碳低品位难选金矿进行了浮选试验研究。采用碳酸钠和水玻璃为调整剂,实现了矿泥分散和脉石矿物的选择性抑制;采用Y89-0为捕收剂,实现了对载金矿物(黄铁矿和砷黄铁矿)的选择性捕收。在磨矿细度-0.074 mm粒级占80%条件下,采用一粗二精三扫闭路浮选流程,在原矿金品位2.36 g/t时,可获得精矿金品位36.08 g/t、回收率86.77%的良好指标。 展开更多
关键词 金矿 黄铁矿 砷黄铁矿 黄金 浮选
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新疆东准噶尔顿巴斯套金矿地质特征及矿床成因 被引量:2
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作者 刘文祥 邓小华 +5 位作者 吴艳爽 韩申 陈西 李巽 王永 陈衍景 《地质论评》 CAS CSCD 北大核心 2021年第3期695-721,共27页
新疆东准噶尔地区自北向南发育额尔齐斯、阿尔曼太、卡拉麦里三条大型构造带,南北两条构造带已发现大量造山型金矿,而阿尔曼太构造带与南北构造带具有相似的成矿地质背景,却未见造山型金矿的报道。因此,笔者等选取了该构造带最重要的金... 新疆东准噶尔地区自北向南发育额尔齐斯、阿尔曼太、卡拉麦里三条大型构造带,南北两条构造带已发现大量造山型金矿,而阿尔曼太构造带与南北构造带具有相似的成矿地质背景,却未见造山型金矿的报道。因此,笔者等选取了该构造带最重要的金矿床——顿巴斯套金矿,开展了详细的岩相学、矿相学研究以及构造解析。研究表明,该矿床具有区域性断裂的次级断裂控矿、脆—韧性剪切带控矿、背斜核部控矿"三位一体"的控矿特征,其中,NW—SE向脆—韧性剪切带是最重要的控矿构造,金矿化显著晚于矿区赋矿岩浆岩——石英闪长玢岩,且该矿床与相邻构造带典型的造山型金矿地质地球化学特征相似。结合成矿流体具有中低温、富CO2的特征,综合认为顿巴斯套金矿是典型的造山型金矿。将该矿床成矿过程划分为3期:(1)以产出草莓状黄铁矿为典型特征的沉积期;(2)以黄铁矿压实、结核、重结晶为特征的成岩期;(3)以产出热液脉和金的矿化为典型特征的热液期。热液期进一步划分为两个阶段:以脆—韧性变形为主的铁白云石—石英—黄铁矿阶段和由脆—韧性变形向脆性变形转变的石英—钠长石—方解石阶段。黄铁矿可划分为6个世代、毒砂可划分为3个世代:(1)Py1为沉积成因的黄铁矿,具有草莓状、胶状等特殊结构;(2)Py2为成岩作用形成的黄铁矿,具有顺层分布、呈结核状等特征;(3)热液期毒砂Apy1,粒度50~100μm,自形、半自形,常与金共生;(4)热液期毒砂Apy2,自形,粒度300~700μm;(5)热液期黄铁矿Py3,他形—自形,粒度50~150μm,以内部包体多、孔洞多为显著特征;(6)热液期黄铁矿Py4,半自形—自形,粒度150~300μm,以包体多,孔洞少,发育压力影为特征;(7)热液期Py5,以背散射下亮度高、显著富As为特征;(8)热液期毒砂Apy3:以颗粒粗大、自形、内部包体少、发育碎裂结构和压力影为特征;(9)热液期黄铁Py6:以颗粒粗大、半自形到自形、内部包体少、发育碎裂结构和压力影为特征。随着脆—韧性变形作用进行,黄铁矿、毒砂的粒度有序递增,自形程度逐渐升高,而品位逐渐降低,金的沉淀主要发生在脆—韧性变形阶段,脆性变形阶段无金矿化。主成矿阶段标志性的铁白云石化蚀变、微细浸染状的黄铁矿化、毒砂化蚀变可以作为找矿标志。 展开更多
关键词 脆—韧性变形 金矿化 黄铁矿 造山型金矿 顿巴斯套金矿 东准噶尔
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李楼深部铁矿石现有流程适用性研究
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作者 蒋广黎 《现代矿业》 CAS 2024年第11期4-8,共5页
为了验证李楼铁矿深部矿石在现行工艺流程中的适用性,并针对原矿性质变化后选矿工艺的优化问题,采用重磁浮联合选别、高场强磁选替换一段弱磁选试验,进行了深部矿石在现有工艺下的选别、现行工艺流程指标优化的研究。最终得到了精矿产率... 为了验证李楼铁矿深部矿石在现行工艺流程中的适用性,并针对原矿性质变化后选矿工艺的优化问题,采用重磁浮联合选别、高场强磁选替换一段弱磁选试验,进行了深部矿石在现有工艺下的选别、现行工艺流程指标优化的研究。最终得到了精矿产率为45.56%、铁品位达到64.29%、铁回收率高达84.72%的分选指标。李楼铁矿现行工艺流程能够满足深部矿石选别指标需求。更换现行工艺流程中一段弱磁选为高场强磁选能够优化选别效果。 展开更多
关键词 镜铁矿 强磁选 螺旋溜槽 浮选 验证试验
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