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Geochemical Characteristics of Volcanogenic Deposits and Exhalation Mineralization in the Crater Part of the Active Kudryavy Volcano (Iturup Island of the Kuril Arc)
Geology of Ore Deposits ( IF 0.7 ) Pub Date : 2020-05-15 , DOI: 10.1134/s1075701520020038
A. G. Marchenko , A. A. Volfson , M. V. Morozov , N. S. Khrol , G. S. Steinberg , M. G. Steinberg

Abstract

Exhalation ore mineralization is developing in the crater part of the active Kudryavy volcano. Lithogeochemical sampling results have revealed that Re, Au, Ag, As, Bi, Cd, Cu, Ge, In, Mo, Pb, S, Sb, Se, Sn, Te, Tl, W, Zn, Rb, and Cs accumulate in solid fumarole formations. These elements are transported by high-temperature volcanic gases and are deposited in mineral phases in the near-surface horizons of fumarole fields under decreasing temperature conditions. The contents of rhenium and other metals in volcanic deposits of fumarole fields locally reach values characteristic of ore deposits. Zoning of lithogeochemical anomalies in ore element associations has been revealed, expressed by the series Re, Mo, W, Au, Cu, Ag, Zn, Cs, Ge → In → Bi, Cd, Pb, Sn, Tl → As, Sb, Se, Te, (Cu, Ag, Au) in the direction from the highest-temperature fumarole fields to less hot, reflecting their temperature zoning. It is demonstrated that lateral geochemical zoning is caused both by the ore element contents in fumarole gases, which depend on temperature, and by differences in the optimal temperature ranges in which various elements precipitate from gases. Signatures for similar exhalation mineral formation processes have been revealed that occurred in the recent geological past at the neighboring extinct Sredny volcano. This suggests the occurrence of similar processes within other volcanic systems of Iturup Island, which increases the prospects for detecting complex exhalation-related manifestations of rare, base, and noble metals.


中文翻译:

Kudryavy活火山(千岛弧的伊图鲁普岛)火山口部分的火山成因沉积物和呼出矿化的地球化学特征

摘要

活跃的库德里亚维火山的火山口部分正在呼出矿石成矿。岩石地球化学采样结果表明,Re,Au,Ag,As,Bi,Cd,Cu,Ge,In,Mo,Pb,S,Sb,Se,Sn,Te,Tl,W,Zn,Rb和Cs积累固体喷气孔形成。这些元素通过高温火山气体传输,并在温度降低的条件下沉积在富马ole田近地表层的矿物相中。喷气孔火山岩沉积物中locally和其他金属的含量局部达到矿床特征值。稀土元素组合中的岩石地球化学异常已被分区,由Re,Mo,W,Au,Cu,Ag,Zn,Cs,Ge→In→Bi,Cd,Pb,Sn,Tl→As→Sb表示硒,碲(铜,银,Au)沿从高温喷气孔场到少热的方向,反映了它们的温度分区。结果表明,横向地球化学区划既是由富马酚气体中的矿石元素含量(取决于温度)引起的,也是由各种元素从气体中析出的最佳温度范围的差异引起的。已发现类似的呼气矿物形成过程的特征发生在最近的地质历史中,发生在邻近的绝种斯雷德尼火山。这表明在伊图鲁普岛的其他火山系统中也发生了类似的过程,这增加了检测稀有金属,贱金属和贵金属与呼气有关的复杂表现的前景。结果表明,横向地球化学区划既是由富马酚气体中的矿石元素含量(取决于温度)引起的,也是由各种元素从气体中析出的最佳温度范围的差异引起的。已经发现类似的呼气矿物形成过程的特征发生在最近的地质历史中,发生在邻近的绝种斯雷德尼火山。这表明在伊图鲁普岛的其他火山系统中也发生了类似的过程,这增加了检测稀有金属,贱金属和贵金属与呼气有关的复杂表现的前景。结果表明,横向地球化学区划既是由富马酚气体中的矿石元素含量(取决于温度)引起的,也是由各种元素从气体中析出的最佳温度范围的差异引起的。已发现类似的呼气矿物形成过程的特征发生在最近的地质历史中,发生在邻近的绝种斯雷德尼火山。这表明在伊图鲁普岛的其他火山系统中也发生了类似的过程,这增加了检测稀有金属,贱金属和贵金属与呼气有关的复杂表现的前景。已经发现类似的呼气矿物形成过程的特征发生在最近的地质历史中,发生在邻近的绝种斯雷德尼火山。这表明在伊图鲁普岛的其他火山系统中也发生了类似的过程,这增加了检测稀有金属,贱金属和贵金属与呼气有关的复杂表现的前景。已发现类似的呼气矿物形成过程的特征发生在最近的地质历史中,发生在邻近的绝种斯雷德尼火山。这表明在伊图鲁普岛的其他火山系统中也发生了类似的过程,这增加了检测稀有金属,贱金属和贵金属与呼气有关的复杂表现的前景。
更新日期:2020-05-15
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