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基于磁异常信息的鄂东北四方山地区沉积变质型锰矿找矿预测

王川 石文杰 朱建东 徐江嬿 陈松 李艳军

王川, 石文杰, 朱建东, 徐江嬿, 陈松, 李艳军. 基于磁异常信息的鄂东北四方山地区沉积变质型锰矿找矿预测[J]. 地质科技通报, 2022, 41(4): 184-196. doi: 10.19509/j.cnki.dzkq.2022.0109
引用本文: 王川, 石文杰, 朱建东, 徐江嬿, 陈松, 李艳军. 基于磁异常信息的鄂东北四方山地区沉积变质型锰矿找矿预测[J]. 地质科技通报, 2022, 41(4): 184-196. doi: 10.19509/j.cnki.dzkq.2022.0109
Wang Chuan, Shi Wenjie, Zhu Jiandong, Xu Jiangyan, Chen Song, Li Yanjun. Prospecting of sedimentary-metamorphic type manganese deposits in the Sifangshan area, northeastern Hubei Province: Insight from magnetic anomaly information[J]. Bulletin of Geological Science and Technology, 2022, 41(4): 184-196. doi: 10.19509/j.cnki.dzkq.2022.0109
Citation: Wang Chuan, Shi Wenjie, Zhu Jiandong, Xu Jiangyan, Chen Song, Li Yanjun. Prospecting of sedimentary-metamorphic type manganese deposits in the Sifangshan area, northeastern Hubei Province: Insight from magnetic anomaly information[J]. Bulletin of Geological Science and Technology, 2022, 41(4): 184-196. doi: 10.19509/j.cnki.dzkq.2022.0109

基于磁异常信息的鄂东北四方山地区沉积变质型锰矿找矿预测

doi: 10.19509/j.cnki.dzkq.2022.0109
基金项目: 

湖北省地质勘查基金项目 〔2020〕7号

中国地质大学(武汉)中央高校基本科研业务费"地学长江计划"核心项目群资助项目 CUGCJ1817

详细信息
    作者简介:

    王川(1996—), 男, 现正攻读资源与环境专业硕士学位, 主要从事矿产勘查与评价研究工作。E-mail: 1764509369@qq.com

    通讯作者:

    石文杰(1985—), 男, 讲师, 主要从事成矿规律与成矿预测教学和研究工作。E-mail: swjhaoo@126.com

    李艳军(1982—),男,副教授,主要从事矿床地球化学、成矿规律与成矿预测教学和研究工作。E-mail: liyj@cug.edu.cn

  • 中图分类号: P618.32

Prospecting of sedimentary-metamorphic type manganese deposits in the Sifangshan area, northeastern Hubei Province: Insight from magnetic anomaly information

  • 摘要:

    为系统开展鄂东北地区锰矿找矿预测, 以四方山地区典型沉积变质型锰矿床为重点解剖对象, 结合高精度磁法测量异常信息, 查明磁异常与锰矿床(体)的空间对应关系。四方山地区锰矿床主要以层状或似层状赋存于新元古代红安岩群黄麦岭岩组(Pt3h)中, 含锰岩系为一套含火山物质、泥质、粉砂质碎屑沉积岩夹碳酸盐岩, 属于陆源碎屑-碳酸盐岩系。含锰岩系因含少量磁铁矿等铁氧化物而多与1∶5万磁法测量中高强度磁异常套合, 但也有部分位于正负磁异常梯度带上。1∶5万磁法总梯度模量中锰矿化富集地段往往与中-低值区(尤其是线性梯度带)对应。基于矿床地质特征、磁法测量资料的二次开发及野外调查成果, 在四方山地区圈定了四个找矿靶区。其中四方山矿区北侧找矿靶区Ⅰ经TC160揭露一层锰矿体, 厚度2.53 m, Mn平均品位为14.63%;四方山矿区内找矿靶区Ⅱ北段经探槽TC140揭露两层锰矿体, 第一层厚1.63 m, Mn平均品位达24.57%;第二层厚0.98 m, Mn品位为16.73%;南段经探槽TC114揭露一层锰矿体, 厚度1.32 m, Mn平均品位为17.60%。团山沟矿区东南部找矿靶区Ⅳ经地质路线调查也发现了锰矿化体, 显示具有良好的找矿前景。

     

  • 图 1  桐柏-大别造山带区域构造地质图(据文献[23]修改)

    ①栾川-合肥断裂;②桐柏-磨子潭断裂;③桐柏-浠水断裂;④新城-黄陂断裂;⑤襄广断裂;⑥澴水断裂;⑦商麻断裂;⑧郯庐断裂

    Figure 1.  Regional tectonic geological map of the Tongbai-Dabieshan orogenic belt

    图 2  四方山地区区域地质图(a)、四方山(b)和团山沟(c)锰矿床地质图

    Figure 2.  Geological maps of the Sifangshan area (a), the Sifangshan (b) and Tuanshangou (c) manganese deposits

    图 3  四方山锰矿床55线(a)和56线(b)勘探线剖面图

    Figure 3.  Geological cross-section of exploration line 55(a) and line 56(b) of the Sifangshan manganese deposit

    图 4  团山沟锰矿床0线地质剖面图

    Figure 4.  Geological cross-section of exploration line 0 of the Tuanshangou manganese deposit

    图 5  四方山地区锰矿床原生及表生氧化锰矿石标本及显微(反射光)照片

    a.四方山矿床锰矿石;b, c.四方山锰矿石镜下照片;d.团山沟矿床锰矿石;e, f.团山沟锰矿石镜下照片。Ma.水锰矿;Pyt.软锰矿;Mt.磁铁矿;Ps.硬锰矿;Rds.菱锰矿;Lm.褐铁矿;Hem.赤铁矿

    Figure 5.  Photos and photomicrograph (in reflection light) of hand specimen of primary and supergene manganese oxide ores from manganese deposits in the Sifangshan area

    图 6  四方山地区1∶5万高精度磁法测量ΔT平面等值线图

    A.原始ΔT平面等值线图;B.化极后ΔT平面等值线图; 图A中b, c表示图 2-b, c的范围

    Figure 6.  1∶500 00 high-precision magnetic measurement of ΔT plane contourmap in the Sifangshan area

    图 7  四方山地区1∶5万高精度磁测原始ΔT向上延拓平面等值线图

    A.向上延拓100 m;B.向上延拓200 m;C.向上延拓400 m;D.向上延拓500 m

    Figure 7.  1∶500 00 high-precision magnetic survey original ΔT upward extension plane contour map in the Sifangshan area

    图 8  四方山地区1∶5万高精度磁法测量原始ΔT总梯度模量平面等值线图

    a.区域等值线图;b.四方山锰矿床等值线图;c.团山沟锰矿床等值线图

    Figure 8.  Plane contour map of original ΔT total gradient modulus measured by 1∶500 00 high-precision magnetic survey in the Sifangshan area

    图 9  四方山地区锰矿成矿预测及工程验证图

    a.找矿靶区分布图;b.TC160探槽编录图;c.TC140探槽编录图;d.TC114探槽编录图;e, f.找矿靶区Ⅳ验证点

    Figure 9.  Metallogenic prediction and engineering verification map of manganese orebodiesin the Sifangshan area

    表  1  四方山地区岩矿石磁性特征统计表

    Table  1.   Magnetic characteristics of rocks and ores in the Sifangshan area

    地层单元 岩性 标本数/块 磁化率K/(10-6πSI) 剩磁Jr/(10-3A·mT-1)
    变化范围 平均值 变化范围 平均值
    K2-E1g 砂砾岩 5 0~400 40.0 0~254 42.0
    Pt3s 变粒岩 30 124~1 849 725.8 9~264 68.2
    变流纹岩 18 2 466~6 377 3 679.0 114~587 319.0
    绿泥片岩 11 0~5 300 1 600.0 0~17 900 2 200.0
    变中基性凝灰岩 13 1 000~2 000 1 500.0 500~2 600
    Pt3q 黑云钠长片麻岩 15 268~751 530.2 10~125 43.6
    钠长片岩 11 52~1 180 318.7 21~235 125.0
    白云钠长石英片岩 9 0~721 80.0 0~293 33.0
    变粒岩 9 0~3 289 991.0 0~9 236 1 900.0
    绿泥绿帘斜长片岩 23 16~741 231.0 18~407 96.5
    Pt3t 绿帘片岩 36 28~1 562 392.3 38~1 506 306.2
    Pt3h 磁铁矿石 3 58 837~82 790 71 141.0 8 205~24 696 15 157.0
    锰矿石 6 19 889~33 594 27 057.0 563~2 008 1 311.0
    白云钠长片岩 7 44~403 258.2 19~280 76.7
    斜长角闪片岩 12 79~6 920 2 896.0 13~781 301.3
    白云质大理岩 10 0 0
    πηγK1 斑状二长花岗岩 11 19~1 175 376.6 36~237 116.8
    πξοJ3 石英正长岩 30 22~1 697 697.0 32~286 98.1
    注:数据来源于湖北省地质局第六地质大队;地层代号同图 1
    下载: 导出CSV
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  • 收稿日期:  2021-01-08
  • 网络出版日期:  2022-09-07

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