| 李仁泽,周正兵,万建军,陈骏.江西省黄坑黑色岩系钒矿床微量元素地球化学特征及成矿背景分析[J].地质找矿论丛,2021,36(4):425-438 |
| 江西省黄坑黑色岩系钒矿床微量元素地球化学特征及成矿背景分析 |
| Trace element geochemical characteristics and metallogenic background of V deposits in black rock series at Huangkeng area, Jiangxi provine |
| 投稿时间：2021-05-28 修订日期：2021-09-28 |
| DOI：10.6053/j.issn.1001-1412.2021.04.004 |
| 中文关键词: 富钒黑色岩系 缺氧还原环境 热水沉积作用 荷塘组 修武盆地 江西省 |
| 英文关键词:v- rich black rock series anoxic reduction environment hot water sedimentation Hetang formation Xiuwu basin Jiangxi province |
| 基金项目:江西省地质勘查基金项目（编号：20150021）、江西省核工业地质局资源储备勘查项目（编号：2019UZK06）联合资助。 |
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| 中文摘要: |
| 江西修武盆地寒武纪早期黑色岩系中富含多种稀散、稀土及放射性等元素，不乏赋存大型、超大型矿床。本文基于黄坑地区下寒武统荷塘组黑色岩系中富钒矿石（21件样品w（V）>4500×10-6，且连续厚度大于2 m）测试分析研究，探讨其微量元素地球化学特征及沉积成矿环境。研究结果表明：①矿样中V、As、Mo、Cd、Sb、U等元素的富集系数在10倍以上，其中Cd最大富集系数达822倍；w（V）=4954.64×10-6~13041.21×10-6，相对于上地壳的富集系数达35~93倍；相对亏损Sc、Co、Ga、Nb、Ta、Sn、Zr、Hf、Th等元素。②矿样w（ΣREE）值介于67.75×10-6~210.80×10-6之间，w（LREE）/w（HREE）=2.14~5.55，w（Eu）/w（Eu*）=1.11~2.42，w（Ce）/w（Ce*）=0.45~0.64。③矿样的w（Ni）/w（Co）=10.80~54.71，w（V）/w（V+Ni）=0.96~0.99，w（V）/w（Cr）=6.91~41.80，w（U）/w（Th）值3.14~31.86，皆表明其形成于缺氧还原环境，且存在较强的海底热水沉积作用-热水喷流沉积型钒矿床。 |
| 英文摘要: |
| The Early Cambrian black rock series in Xiuwu Basin of Jiangxi province is abundant with dispersed metals, REE and radioactive elements and large and super-large metal and nonmetal deposits of such elements occur here. Based on study of analysis of 21 samples of V-rich ore (w(V)>4500×10-6, >2 m thick) the trace element geochemical characteristics and sedimentary metallogenic environment are discussed and explored. The analysis and calculation are that 1)enrichment coefficients of V, As, Mo, Cd, Sb, U etc. of the samples is more than ten times of those of the upper crust, especially coefficient of Cd 822 times; w(V)=4954.54×10-6-13041.21×10-6, 35-93 times, but Sc, Co, Ga, Nb, Ta, Sn, Zr, Hf, etc. depleted; 2)w(ΣREE)=67.75×10-6-210.80×10-6), w(LREE)/w(HREE)=2.14-5.55, w(Eu)/w(Eu*)=1.11~2.42, w(Ce)/w(Ce*)=0.45-0.64, the ratio of w(Ni)/w(Co), w(V)/w(V+Ni), w(V)/w(Cr) and w(U)/w(Th) 10.80-54.71, 0.96-0.99, 6.91-41.80, and 3.14-31.86 respectively. The above data indicate that the V-rich ore is formed under anoxic reduction hot water sedimentary environment thus the deposits are eruptive hot water sedentary ore deposits. |
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