地球科学进展 ›› 2013, Vol. 28 ›› Issue (10): 1160 -1169. doi: 10.11867/j.issn.1001-8166.2013.10.1160

研究简报 上一篇    下一篇

黔东下寒武统黑色页岩微量元素的富集及成因分析
杨恩林 1, 2, 吕新彪 1*, 鲍淼 3, 罗建均 2, 胡庆成 1   
  1. 1. 中国地质大学资源学院, 湖北 武汉 430074; 
    2. 贵州地矿局117地质队 贵州 贵阳 550018; 
    3. 贵州地矿局112地质队 安顺 561000
  • 收稿日期:2013-05-30 出版日期:2013-10-10
  • 基金资助:

    “十二五”国家科技支撑计划项目05子课题“库鲁克塔格铜金铁成矿带成矿条件研究与找矿靶区评价研究”(编号:2011BAB06B04-05)

Enrichment and Origin of Some Trace Elements in Black Shales from the Early Cambrian in Eastern Guizhou Province

Yang Enlin 1, 2, Lü Xinbiao 1, Bao Miao 3, Luo Jianjun 2, Hu Qingcheng 1   

  1. 1.Faculty of Earth Resources, China University of Geosciences, Wuhan 430074, China; 
    2.The Geological Team 117 Bureau of Geology and Mineral Exploration and Development of Guizhou Province, Guiyang 550018, China; 
    3.The Geological Team 112 Bureau of Geology and Mineral Exploration and Development of Guizhou Province, Anshun 561000, China
  • Received:2013-05-30 Online:2013-10-10 Published:2013-10-10

对黔东下寒武统以泥、碳岩性组合为主的多金属元素富集层(黑色页岩)的元素地球化学、13C, 18O同位素以及岩性组合分析表明:微量元素蛛网图协同变化, 暗示其成因上具有同源性。黑色页岩13C, 18O同位素、稀土元素配分模式和富集元素组合特征, 表明其具有深部热流体物质, 分布有热水活动的陆棚海局限盆地边缘相带有利于元素沉淀富集。34S同位素和氧化还原敏感元素组合特征, 暗示静水缺氧环境有利于元素沉淀。黑色页岩岩性组合特征(含磷、石煤层)和高有机碳含量支持沉积物受上升洋流影响。

The analysis is based on the elemental geochemistry, 13C, 18O isotope and lithology combination of the black shale, a set assemblage mud and carbon of lithology , in East Guizhou. The coordinated change in spider diagrams of race elements suggests those elements have the same source. The 13C, 18O isotopes, mode of REE partition and characteristic enrichment of elements assemblage in carbonaceous shale show that the deep thermal fluid is added, and the shelf sea basin edge with distribution of hydrothermal activity is propitious to precipitation of ore elements. Evidence from the 34S isotope and redox-sensitive elements show that the hydrostatic hypoxia environment is also conducive to precipitation of elements. The lithologic features (phosphorus, coal-bearing layers) and high content of organic carbon indicate that the deposits are influenced by the upwelling ocean current.

中图分类号: 

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