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    河北邯邢地区白涧铁矿蚀变矿物红外光谱分析及找矿研究

    成嘉伟 刘新星 张娟 卢克轩 王瑛雪 杨俊峰 邱佳炜

    成嘉伟, 刘新星, 张娟, 卢克轩, 王瑛雪, 杨俊峰, 邱佳炜, 2023. 河北邯邢地区白涧铁矿蚀变矿物红外光谱分析及找矿研究. 地球科学, 48(4): 1551-1567. doi: 10.3799/dqkx.2022.303
    引用本文: 成嘉伟, 刘新星, 张娟, 卢克轩, 王瑛雪, 杨俊峰, 邱佳炜, 2023. 河北邯邢地区白涧铁矿蚀变矿物红外光谱分析及找矿研究. 地球科学, 48(4): 1551-1567. doi: 10.3799/dqkx.2022.303
    Cheng Jiawei, Liu Xinxing, Zhang Juan, Lu Kexuan, Wang Yingxue, Yang Junfeng, Qiu Jiawei, 2023. Infrared Spectral Analysis and Prospecting of Alteration Minerals of Baijian Skarn-Type Iron Deposit in Han-Xing Area. Earth Science, 48(4): 1551-1567. doi: 10.3799/dqkx.2022.303
    Citation: Cheng Jiawei, Liu Xinxing, Zhang Juan, Lu Kexuan, Wang Yingxue, Yang Junfeng, Qiu Jiawei, 2023. Infrared Spectral Analysis and Prospecting of Alteration Minerals of Baijian Skarn-Type Iron Deposit in Han-Xing Area. Earth Science, 48(4): 1551-1567. doi: 10.3799/dqkx.2022.303

    河北邯邢地区白涧铁矿蚀变矿物红外光谱分析及找矿研究

    doi: 10.3799/dqkx.2022.303
    基金项目: 

    国家自然科学基金项目 41702352

    国家重点研发计划青年科学家项目 2021YFC2900100

    河北地质大学博士启动基金 BQ2017012

    河北省研究生创新资助项目 CXZZSS2022017

    详细信息
      作者简介:

      成嘉伟(1998-),男,硕士生,主要从事红外光谱找矿勘查工作. ORCID:0000-0002-9102-0685. E-mail:Chengjiawei7758258@163.com

      通讯作者:

      刘新星, E-mail: liuxinxing963@163.com

    • 中图分类号: P631.7

    Infrared Spectral Analysis and Prospecting of Alteration Minerals of Baijian Skarn-Type Iron Deposit in Han-Xing Area

    • 摘要: 邯邢地区是我国重要的富铁矿矿集区之一,随着找矿深度的增加,传统的勘查手段找矿效果并不理想,亟需新的方法和理念来指导进一步的矿产勘查工作.利用红外光谱技术(SWIR+TIR)快速厘定岩心内矿物类型、相对丰度和空间分布特征,揭示主要蚀变矿物波谱参数变化规律,确定与成矿相关的信息. 通过红外光谱测试,解译出二十余种矿物并划分出5个蚀变带,自岩体向围岩依次为绢云母-贫铁/铁镁绿泥石-方解石-钠长石带(蚀变带Ⅰ),贫铁绿泥石-蛇纹石-透闪石-阳起石-透辉石-金云母带(蚀变带Ⅱ),方解石-铁/白云石-菱铁矿带(蚀变带Ⅲ),绢云母-伊利石-方解石-白云石-菱铁矿带(蚀变带Ⅳ),绢云母-伊利石-高岭石-蒙脱石带(蚀变带Ⅴ). 研究发现,越靠近矿化富集区域,绿泥石Fe-OH2250Pos、白云石6.45 μmPos和11.2 μmPos呈现降低的趋势;绢云母族矿物Al-OH2200FWHM的降低和高岭石族矿物Al-OH2170-IC的增大均指向更高温的流体环境.低Fe-OH2250Pos的绿泥石(< 2 245 nm)、低6.45 μmPos(< 6 440 nm)且低11.2 μmPos(< 11 250 nm)的白云石是白涧矿区有效的找矿标志;绢云母Al-OH2200FWHM的降低(30→22)和高岭石Al-OH2170-IC的增大(0.2→2.8)能判断深部是否存在矿化系统.以上成果为白涧矿区矿产勘查工作提供科学依据,同时也为邯邢地区同类型矿床找矿工作提供新方法.

       

    • 图  1  邯邢地区地层、岩浆岩及矿床分布(据Zhang et al.,2015修改)

      a.华北克拉通中生代火成岩分布图;b.邯邢地区地质图

      Fig.  1.  Strata, igneous rocks and deposits of the Han-Xing region (modified after Zhang et al., 2015)

      图  2  白涧矿区地质简图(据郝俊杰等,2011修改)

      Fig.  2.  Geological map of the Baijian region(modified after Hao et al., 2011)

      图  3  白涧矿区28号线剖面图(据文广,2017修改)

      Fig.  3.  The 28# profile of Baijian(modified after Wen, 2017)

      图  4  红外光谱填图

      Fig.  4.  Spectrum mapping of SWIR and TIR

      图  5  白涧蚀变矿物镜下照片

      Ser.绢云母;Chl.绿泥石;Di.透辉石;Phl.金云母;Tr.透闪石;Ab.钠长石;Amp.角闪石;Cc.方解石;Dol.白云石;Mnt.蒙脱石;Ill.伊利石;Mt.磁铁矿;Hem.赤铁矿;Py.黄铁矿. a.斜长石发生绢云母化,角闪石发生绿泥石化;b.内矽卡岩带透辉石;c.磁铁矿与金云母和透闪石共生;d.碳酸盐化;e.绢云母化+蒙脱石化+伊利石化;f.绿泥石化;g~h.斜长石和角闪石发生钠长石化,析出磁铁矿;i.内矽卡岩带透辉石和磁铁矿;j~k.磁铁矿和蛇纹石、透闪石共生;l.磁铁矿被赤铁矿和方解石交代

      Fig.  5.  Photographs of alteration minerals in Baijian

      图  6  ZK0818矿物组合分带

      Fig.  6.  Mineral assemblage zoning of ZK0818

      图  7  白涧矿区绿泥石2250Pos吸收峰位值变化示意图

      Fig.  7.  Sketch geological map showing chlorite 2250Pos absorption position from Baijian

      图  8  ZK0818绢云母Al-OH2200FWHM和高岭石Al-OH2170-IC变化示意图

      Fig.  8.  Sketch showing of ZK0818 sericite Al-OH2200 FWHM and kaolinite Al-OH2170-IC

      图  9  ZK0604碳酸盐矿物反射峰位值变化示意图

      Fig.  9.  Sketch showing carbonate minerals reflect position in ZK0604

      图  10  ZK0606碳酸盐矿物反射峰位值变化示意图

      Fig.  10.  Sketch showing carbonate minerals reflect position in ZK0606

      图  11  白涧矽卡岩型铁矿床蚀变矿物光谱勘查模型

      Fig.  11.  The altered mineral spectral exploration model from the Baijian skarn-type iron deposit

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    • 收稿日期:  2022-04-02
    • 刊出日期:  2023-04-25

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