华南早寒武世黑色岩系镍钼多金属矿床元素地球化学特征
首发时间:2017-12-29
摘要:湖南张家界三岔下寒武统黑色岩系中发育有镍钼多金属矿床,这是华南乃至全球这类矿床的典型实例之一。其成因由于成矿作用过程复杂而存在争议。目前研究认为主要存在以下5种元素来源:(1)地外来源;(2)热水(液)来源;(3)海水来源;(4)火山碎屑来源;(5)多种成因复合而成。本文通过元素地球化学研究,对黑色页岩及含矿层进行分析,结果发现微量元素和稀土元素主要来源于热水,有机质在成矿中起到重要作用。
关键词: Ni-Mo多金属矿床 热水(液)来源 海水来源 早寒武世 华南
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Element geochemistry of Ni-Mo polymetallic deposits in early Cambrian black rock series from South China
Abstract:The Ni-Mo polymetallic deposits hosted in Early Cambrian black rock series in the Zhangjiajie Shancha of Hunan Province, China is a representative case of such deposits in southern China and even worldwide. Their origin is debatable because the mineralization is complex. There are five possible sources for this deposit: (1) External of Earth; (2) Hydrothermal; (3) Seawater; (4) Volcaniclastic; (5) Multiple. Element geochemistry is conducted in this paper, and after analyzing the black shale and ore layer, it is realized that the trace elements and rare earth elements are mainly from hydrothermal water. Besides, the organic matter played an important role in mineralization.
Keywords: Ni-Mo polymetallic deposit Origin of hyrothermal water Origin of seawater The early Cambrian South China
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