中、西太平洋海山富钴结壳碲元素地球化学特征及其资源潜力  

Geochemical characteristics and resource potentiality evaluation of tellurium in Co-rich crusts from the Mid-West Pacific Ocean

作　　者：张辉 刘季花 高晶晶 崔迎春 张颖 白亚之 何连花 Zhang Hui;Liu Jihua;Gao Jingjing;Cui Yingchun;Zhang Ying;Bai Yazhi;He Lianhua(Key Laboratory of Marine Geology and Metallogeny,First Institute of Oceanography,Ministry of Natural Resources,Qingdao 266061,China;Laboratory for Marine Geology,Laoshan Laboratory,Qingdao 266061,China)

机构地区：[1]自然资源部第一海洋研究所海洋地质与成矿作用自然资源部重点实验室,山东青岛266061 [2]崂山实验室海洋地质过程与环境功能实验室,山东青岛266061

出　　处：《海洋学报》2023年第6期109-121,共13页

基　　金：国家自然科学基金(40976038);自然资源部第一海洋研究所基本科研业务费专项资金(GY02-2013G06);崂山实验室山东省专项(2021QNLM020003-2);国际海域资源调查与开发“十二五”规划项目(DY125-13-R-07)。

摘　　要：根据太平洋海山群(中太平洋海山群、莱恩海山链)和西太平洋海山群(麦哲伦海山群、马尔库斯维克海山群、马绍尔海山群)5个海山群14座海山的185个富钴结壳样品的碲元素分析测试,研究了其组成特征、空间分布规律、赋存相态及资源潜力。结果表明,研究区富钴结壳中碲元素质量分数的变化范围为17.8~145.2μg/g,平均值为47.4μg/g;各海山群碲元素的含量范围及区域富集程度存在较大差异,富集程度由高到低依次为麦哲伦海山群、马绍尔海山群、马尔库斯维克海山群、中太平洋海山群和莱恩海山链,区域上呈现自西向东逐渐降低的趋势。碲元素含量与水深呈径向相同、纬向相反的趋势,说明碲元素的富集不仅与结壳在海水中的产出深度有关,还与经纬度、海山地形及区域成矿环境有关。淋滤结果显示碲元素主要富集在铁氧化物及残渣态中,富氧环境和生物作用磷酸盐化对碲的富集成矿起决定性作用。参照陆地伴生有用元素最低工业品位要求,中、西太平洋研究区域海山样品富钴结壳碲元素含量均达到了工业品位要求,具有潜在的开发价值。由富钴结壳储量估算,中、西太平洋富钴结壳中碲储量大于7.63万t,是海底碲资源的重要储备基地。In this paper,185 iron manganeses crustal samples of 14 seamounts in 5 seamount groups of the Pacific seamount group(Central Pacific seamounts,Line seamount Chain)and the Western Pacific seamount group(Magellanic seamounts,Markus−Wake seamounts,marshall seamounts)have been analyzed for tellurium,and their spatial distribution,geochemical characteristics,chemical form and resource potential have been studied.The results show that the variation range of tellurium in cobalt-rich crusts is from 17.8μg/g to 145.2μg/g,and the average value is 47.4μg/g.The content range and regional enrichment degree of tellurium in each seamount are quite different.The enrichment degree in descending order is the Magellanic seamounts,Marshall seamounts,Marcus−Wake seamounts,Central Pacific seamounts and Line seamount Chain,showing a trend of gradually decreasing from west to east,and different seamount groups also show obvious regional distribution characteristics.Tellurium content and water depth profile show the same radial and opposite latitudinal trends,indicating that the enrichment of Te is not only related to the depth of crust in seawater,but also related to the longitude and latitude,seamount topography,and regional metallogenic environment.The leaching results show that tellurium is mainly enriched in iron oxides and residues,and the oxygen-rich environment and biological action of phosphorylation play a decisive role in the enrichment of tellurium.Concerning the minimum industrial grade requirements for terrestrial associated useful elements,the tellurium content in cobalt-rich crusts of seamount samples in the Mid-West Pacific Ocean study areas meets the industrial grade requirements,which has potential development value.According to the estimation of cobalt-rich crust reserves,the tellurium reserves in cobalt-rich crusts in the Mid-West Pacific Ocean are more than 76300 tons,which is an important reserve base for seafloor tellurium resources.

关 键 词：富钴结壳 碲元素 分布规律 富集机制 资源潜力 中、西太平洋 

分 类 号：P575.3[天文地球—矿物学]