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河北迁安杏山铁矿床地球化学特征及其对成矿物质来源的指示

丁文君 陈正乐 陈柏林 董法先 崔玲玲

丁文君, 陈正乐, 陈柏林, 等, 2009. 河北迁安杏山铁矿床地球化学特征及其对成矿物质来源的指示. 地质力学学报, 15 (4): 363-373.
引用本文: 丁文君, 陈正乐, 陈柏林, 等, 2009. 河北迁安杏山铁矿床地球化学特征及其对成矿物质来源的指示. 地质力学学报, 15 (4): 363-373.
DING Wen-jun, CHEN Zheng-le, CHEN Bo-lin, et al., 2009. GEOCHEMICAL CHARACTERS OF BAND IRON FORMATIONS FROM XINGSHAN IRON DEPOSIT IN QIAN'AN AREA, HEBEI PROVINCE: IMPLICATION FOR THEIR ORIGIN. Journal of Geomechanics, 15 (4): 363-373.
Citation: DING Wen-jun, CHEN Zheng-le, CHEN Bo-lin, et al., 2009. GEOCHEMICAL CHARACTERS OF BAND IRON FORMATIONS FROM XINGSHAN IRON DEPOSIT IN QIAN'AN AREA, HEBEI PROVINCE: IMPLICATION FOR THEIR ORIGIN. Journal of Geomechanics, 15 (4): 363-373.

河北迁安杏山铁矿床地球化学特征及其对成矿物质来源的指示

基金项目: 

全国危机矿山接替资源找矿项目 200799094

全国危机矿山接替资源找矿项目 20089950

详细信息
    作者简介:

    丁文君(1984-),女,在读硕士,主要从事矿床地球化学研究。E-mail: dingdngwj@yeah.net

  • 中图分类号: P618.31

GEOCHEMICAL CHARACTERS OF BAND IRON FORMATIONS FROM XINGSHAN IRON DEPOSIT IN QIAN'AN AREA, HEBEI PROVINCE: IMPLICATION FOR THEIR ORIGIN

  • 摘要: 不同学者曾对迁安地区铁矿床的前寒武地质、岩石学和地球化学等方面进行了深入的研究,但是其成矿物质来源至今没有进行深入探讨。危机矿山勘察在迁安杏山矿床中发现了富大铁矿体,但其成因不明。本文通过对迁安富矿和普通矿石的主量、微量元素和稀土元素研究,结果表明它们的化学成分主要由Fe2O3(T)、SiO2组成,并且Al2O3和TiO2具有较低的含量,指示其形成时几乎没有碎屑物质的加入。而经PAAS标准化后,稀土元素的配分模式表现轻稀土亏损、重稀土富集的特征,无论是富矿还是普通矿石,都具有Eu正异常、其Co/Zn和Ni/Zn比值与热液类似的特征,表明形成时有高温热液加入;其Y/Ho > 44、Y的正异常表明其有海水的成因;La/La*表明其没有陆源碎屑加入;LaN/YVN < 1,表明既有海水特征,又有热液特征,所有这些数据都显示了迁安铁矿矿石的物质来源为海水和热液,与其他地方BIF铁矿物质来源一致。由于富矿和普通矿石的物质来源一致、主微量及稀土元素含量和分布类似、铁矿物主要为磁铁矿、原始沉积条带明显,推断富矿可能是火山一沉积建造原始沉积时由于局部富铁环境而形成的。

     

  • 图  1  迁安地区地质简图及其大地构造位置图

    1.第四系;2.古近系新集组;3.上侏罗统;4.中元古界;5.中太古界三屯营组;6.磁铁石英岩;7.断层

    Figure  1.  Simplified geological map of Qian'an area and its geological setting

    图  2  杏山矿床BIF型铁矿石REE + Y分布图[16],图A为富矿,图B为普通矿石

    Figure  2.  PASS-noimalized REE + Y diagram of BIF from Qian'an area

    表  1  杏山矿床富矿及普通矿石主量元素分析数据(wt.%)

    Table  1.   Major element contents of BIF bulk samples from Xingshan deposit, Qian'an area(wt.%)

    表  2  杏山矿床BIF型富矿全岩样品微量元素及稀土元素的分析结果

    Table  2.   Trace and rare earth element contents of Fe-iich BIFs from Xingshan deposit, Qian'an area

    表  3  迁安矿床BIF型普通矿石全岩样品微量元素和稀土元素的分析结果

    Table  3.   Trace and rare earth element contents of BIFs from Qian'an deposit, Qian'an area

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  • 收稿日期:  2009-09-23
  • 刊出日期:  2009-12-28

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