留言板

尊敬的读者、作者、审稿人, 关于本刊的投稿、审稿、编辑和出版的任何问题, 您可以本页添加留言。我们将尽快给您答复。谢谢您的支持!

姓名
邮箱
手机号码
标题
留言内容
验证码

古地磁学在矿床研究中的应用

黄玺 郑义 陈炳辉 王成明 虞鹏鹏

黄玺, 郑义, 陈炳辉, 等, 2019. 古地磁学在矿床研究中的应用. 地质力学学报, 25 (S1): 5-9. DOI: 10.12090/j.issn.1006-6616.2019.25.S1.002
引用本文: 黄玺, 郑义, 陈炳辉, 等, 2019. 古地磁学在矿床研究中的应用. 地质力学学报, 25 (S1): 5-9. DOI: 10.12090/j.issn.1006-6616.2019.25.S1.002
HUANG Xi, ZHENG Yi, CHEN Binghui, et al., 2019. APPLICATION OF PALEOMAGNETISM IN ORE DEPOSIT STUDY. Journal of Geomechanics, 25 (S1): 5-9. DOI: 10.12090/j.issn.1006-6616.2019.25.S1.002
Citation: HUANG Xi, ZHENG Yi, CHEN Binghui, et al., 2019. APPLICATION OF PALEOMAGNETISM IN ORE DEPOSIT STUDY. Journal of Geomechanics, 25 (S1): 5-9. DOI: 10.12090/j.issn.1006-6616.2019.25.S1.002

古地磁学在矿床研究中的应用

doi: 10.12090/j.issn.1006-6616.2019.25.S1.002
基金项目: 

广东省自然科学基金杰出青年基金 2018B030306021

详细信息
    作者简介:

    黄玺(1996-), 男, 在读硕士, 地球化学专业。E-mail:huangx276@mail2.sysu.edu.cn

    通讯作者:

    郑义(1984-), 男, 博士, 副教授, 矿床学。E-mail:zhengy43@mail.sysu.edu.cn

  • 中图分类号: P318.44

APPLICATION OF PALEOMAGNETISM IN ORE DEPOSIT STUDY

  • 摘要: 古地磁学是研究地质历史上地球磁场强度及其变化的一门学科,其核心是岩石中富含若干的磁性矿物。通过测定其保存的剩磁强度和方向等,可计算获得岩石形成时的初始磁性强度和方向,从而为约束岩石形成时的古磁极位置、形成时代和地球动力学背景等研究提供证据。矿石作为地球演化过程中形成的一类特殊的岩石,对其进行古地磁研究可为矿床的"源—运—储—保—变"等过程提供强有力的证据。现有关于矿床古地磁学的研究主要集中在两方面,一是通过矿物的退磁参数限定其形成时的磁化年龄(矿床定年),二是通过磁组构信息获取矿床形成后的构造应力场变化(矿床保存变化)。需要指出的是,矿床古地磁学的研究一定要立足于地质事实。由于地质产状和围岩蚀变对磁性参数的影响极大,在进行矿床地磁数据处理时一定要慎重,并与磁性地层学互相印证,才有可能获得有价值的磁性参数,从而为约束矿床成因提供有效证据。

     

  • 图  1  劳伦大陆到欧洲晚古生代部分视极移路径图(APWP)(据文献[7])

    Figure  1.  Partial apparent polar wander path(APWP) of late Paleozoic from Laurentia to Europe(Figure from [7])

    图  2  Cloud矿区矿石退磁曲线(据文献[9])

    Figure  2.  Orthogonal vector plots for the remanence of example specimens on alternating field step demagnetization and thermal step demagnetization (after [9])

    表  1  区域平均特征剩余磁化强度

    Table  1.   Group mean characteristic remanent magnetization (ChRM) directions

    采样位置 采样点 特征剩磁方向平均值
    数量 磁偏角/(°) 磁倾角/(°) α95 k Note1
    Black Cloud矿区 8-10 3 173.1 -56.8 16.2 58.7 u, R
    3 185.2 -57.9 16.2 58.7 c, R
    Pando斑岩接触带 11, 12, 26 3 309.4 51.5 13.1 89.5 u, M
    3 326.2 65.6 17.0 53.8 c, M
    大陆主要矿区 1, 2, 4, 5 4 340.0 68.9 15.3 37.0 u, N
    4 335.5 73.6 27.5 12.1 c, N
    注:Note1未校正(u)或校正(c)的顺层倾斜,正常极性(N),反向极性(R),极性混乱(M),数字为采样点
    下载: 导出CSV

    表  2  各矿区古地磁极位置

    Table  2.   Pole positions

    采样位置 采样点 经度E/(°) 纬度N/(°) dp/(°) dm/(°)
    Black Cloud矿区 1 147.4 84.3 17.1 23.5
    大陆主要矿区 5 214.0 71.0 22.0 26.0
    第三纪(所有位置) 11 190.6 78.7 10.2 13.1
    下载: 导出CSV
  • [1] 亚夏尔·亚力坤.沉积岩容矿铅锌矿床的古地磁研究[D].北京: 中国地质大学(北京), 2017.

    Yachar Yalikun. Paleomagnetic study of Pb-Zn deposits hosted by sedimentary rocks[D]. Beijing: China University of Geosciences (Beijing), 2017. (in Chinese with English abstract)
    [2] SYMONS D T A, SMETHURST M T, ASHTON J H. Paleomagnetism of the Navan Zn-Pb Deposit, Ireland[J]. Economic Geology, 2002, 97(5): 997-1012. doi: 10.2113/gsecongeo.97.5.997
    [3] PIGNOTTA G S, BENN K. Magnetic fabric of the Barrington Passage pluton, Meguma Terrane, Nova Scotia: a two-stage fabric history of syntectonic emplacement[J]. Tectonophysics, 1999, 307(1-2): 75-92. doi: 10.1016/S0040-1951(99)00119-5
    [4] TRENCH A, 郭友钊.古地磁测定矿床年代:简要评述及在西澳大利亚应用的展望[J].物探化探译丛, 1994, (2): 16-21.

    TRENCH A, GUO Youzhao. Paleomagnetic dating of ore deposits: a brief review and prospects for its application in Western Australia[J]. Geophysical and Geochemical Interpretation Series, 1994, (2): 16-21. (in Chinese)
    [5] 李金超, 孔会磊, 栗亚芝, 等.青海东昆仑西藏大沟金矿床花岗闪长斑岩锆石U-Pb年龄、地球化学及其成矿意义[J].地质力学学报, 2018, 24(2): 188-198. http://journal.geomech.ac.cn/ch/reader/view_abstract.aspx?flag=1&file_no=20180205&journal_id=dzlxxb

    LI Jinchao, SUN Huilei, LI Yazhi, et al. Zircon U-Pb dating, geochemical characteristics and metallogenic significance of gronodiorite porphyry from the Xizangdagou gold deposit in east Kunlun, Qinghai province[J]. Journal of Geomechanics, 2018, 24(2): 188-198. (in Chinese with English abstract) http://journal.geomech.ac.cn/ch/reader/view_abstract.aspx?flag=1&file_no=20180205&journal_id=dzlxxb
    [6] QIU W J, ZHOU M F, LIU Z R. Late Paleozoic SEDEX deposits in South China formed in a carbonate platform at the northern margin of Gondwana[J]. Journal of Asian Earth Sciences, 2018, 156: 41-58. doi: 10.1016/j.jseaes.2018.01.006
    [7] PANNALAL S J, SYMONS D T A, SANGSTER D F. Paleomagnetic evidence for an Early Permian age of the Lisheen Zn-Pb deposit, Ireland[J]. Economic Geology, 2008, 103(8): 1641-1655. doi: 10.2113/gsecongeo.103.8.1641
    [8] ZHENG W, MAO J W, PIRAJNO F, et al. Geochronology and geochemistry of the Shilu Cu-Mo deposit in the Yunkai area, Guangdong Province, South China and its implication[J]. Ore Geology Reviews, 2015, 67: 382-398. doi: 10.1016/j.oregeorev.2014.12.009
    [9] SYMONS D T A, LEWCHUK M T, TAYLOR C D, et al. Age of the Sherman-Type Zn-Pb-Ag Deposits, Mosquito Range, Colorado[J]. Economic Geology, 2000, 95(7): 1489-1504. http://www.wanfangdata.com.cn/details/detail.do?_type=perio&id=1096071da613220ca9f9081e1074b533
    [10] TORSVIK T H, SMETHURST M T, MEERT J G, et al. Continental break-up and collision in the Neoproterozoic and Palaeozoic-a tale of Baltica and Laurentia[J]. Earth Science Reviews, 1996, 40(3-4): 229-258. doi: 10.1016/0012-8252(96)00008-6
    [11] TORSVIK T H, VAN DER VOO R, MEERT J G, et al. Reconstructions of the continents around the North Atlantic at about the 60th parallel[J]. Earth and Planetary Science Letters, 2001, 187(1-2): 55-69. doi: 10.1016/S0012-821X(01)00284-9
    [12] SYMONS D T A, PANNALAL S J, KAWASAKI K, et al. Paleomagnetic age of the Magcobar Ba deposit, Silvermines, Ireland[A]. Mineral Exploration and Research: Digging Deeper[C]. Dublin: Irish Association for Economic Geology, 2007, 377-380.
    [13] PANNALAL S J, SYMONS D T A, SANGSTER D F. Paleomagnetic dating of Upper Mississippi Valley zinc-lead mineralization, WI, USA[J]. Journal of Applied Geophysics, 2004, 56(2): 135-153. doi: 10.1016/j.jappgeo.2004.04.006
    [14] 阎桂林, 魏燕平.安徽庐江龙桥铁矿含矿地层的古地磁学研究[J].地球科学:中国地质大学学报, 1994, 19(5): 695-700. http://www.wanfangdata.com.cn/details/detail.do?_type=perio&id=QK199400803380

    YAN Guilin, WEI Yanping. Study on paleomagnetism of iron bed of Longqiao iron ore mine in Lujiang, Anhui Province[J]. Earth Science: Journal of China University of Geosciences, 1994, 19(5): 695-700. (in Chinese with English abstract) http://www.wanfangdata.com.cn/details/detail.do?_type=perio&id=QK199400803380
    [15] SIZARET S, CHEN Y, CHAUVET A, et al. Magnetic fabrics and fluid flow directions in hydrothermal systems. A case study in the Chaillac Ba-F-Fe deposits (France)[J]. Earth and Planetary Science Letters, 2003, 206(3-4): 555-570. doi: 10.1016/S0012-821X(02)01112-3
    [16] 马天林, 王连庆, 孙立倩, 等.磁组构分析在韧性变形带研究中的应用[J].地球学报, 2003, 24(5): 449-452. doi: 10.3321/j.issn:1006-3021.2003.05.010

    MA Tianlin, WANG Lianqing, SUN Liqian, et al. Application of magnetic fabric analysis to the ductile deformation belt in the Tuwu Copper Deposit, East Tianshan, Xinjiang[J]. Acta Geoscientica Sinica, 2003, 24(5): 449-452. (in Chinese with English abstract) doi: 10.3321/j.issn:1006-3021.2003.05.010
    [17] SYMONS D T A. Paleomagnetism of the HYC Zn-Pb SEDEX Deposit, Australia: Evidence of an epigenetic origin[J]. Economic Geology, 2007, 102(7): 1295-1310. doi: 10.2113/gsecongeo.102.7.1295
  • 加载中
图(2) / 表(2)
计量
  • 文章访问数:  406
  • HTML全文浏览量:  123
  • PDF下载量:  29
  • 被引次数: 0
出版历程
  • 刊出日期:  2019-05-01

目录

    /

    返回文章
    返回