Abstract

SEM-EDS analysis of cobalt-rich Fe–Mn crusts (CRFMC) and their substrate rocks from the Gummy Bear seamount in the northwestern Pacific Ocean and the Magellan seamounts (Ilyicheva and Vulcanologist guyots) in the subequatorial Pacific Ocean revealed the presence of accessory (0.6–40 μm) two- and three-component minerals of the Ag–Au–Cu system, which is indicative of a wider distribution of authigenic gold mineralization than one would expect for such deposits. A concept for the biogeochemical genesis of these natural alloys was proposed, including the processes of biosorption, bioaccumulation, and biotransformation of metal ions by microbial cells to their metallic nano- and microforms.

中文翻译：

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西北太平洋海底铁锰结壳中天然金的性质

摘要

SEM-EDS分析了西北太平洋胶粘熊海山和赤道下太平洋麦哲伦海山（Ilyicheva和Vulcanologist Guyots）的富钴铁锰结壳（CRFMC）及其基底岩石0.6–40μm）的银-金-铜系统的二和三组分矿物，这表明自生金矿化的分布比人们对此类矿床的预期要广。提出了这些天然合金的生物地球化学成因的概念，包括微生物细胞对金属离子的生物吸附，生物蓄积和生物转化，使其转变为金属纳米形式和微观形式的过程。