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宁武天池干海湖泊沉积物的部分非磁滞剩磁研究

张淑伟 刘青松 王喜生 CioppaMaria 霍俊杰 吕义清 乔彦松 赵越

张淑伟, 刘青松, 王喜生, 等, 2017. 宁武天池干海湖泊沉积物的部分非磁滞剩磁研究. 地质力学学报, 23 (4): 612-616.
引用本文: 张淑伟, 刘青松, 王喜生, 等, 2017. 宁武天池干海湖泊沉积物的部分非磁滞剩磁研究. 地质力学学报, 23 (4): 612-616.
ZHANG Shuwei, LIU Qingsong, WANG Xisheng, et al., 2017. A STUDY ON PARTIAL ANHYSTERETIC REMANENCE IN SEDIMENTS FROM GANHAI LAKE, NINGWU TIANCHI. Journal of Geomechanics, 23 (4): 612-616.
Citation: ZHANG Shuwei, LIU Qingsong, WANG Xisheng, et al., 2017. A STUDY ON PARTIAL ANHYSTERETIC REMANENCE IN SEDIMENTS FROM GANHAI LAKE, NINGWU TIANCHI. Journal of Geomechanics, 23 (4): 612-616.

宁武天池干海湖泊沉积物的部分非磁滞剩磁研究

基金项目: 

国家自然科学基金青年基金项目 41204052

国家博士后基金 2014M550780

山西省自然基金 2014011032-2

山西省回国留学人员基金 2014-021

详细信息
    作者简介:

    张淑伟(1974-), 女, 博士, 岩石磁学和环境磁学专业, 从事环境磁学和古气候变化研究.E-mail:zhang.shuwei@163.com

  • 中图分类号: P318.41

A STUDY ON PARTIAL ANHYSTERETIC REMANENCE IN SEDIMENTS FROM GANHAI LAKE, NINGWU TIANCHI

  • 摘要: 应用部分非磁滞剩磁(pARM)谱,对山西宁武天池干海湖泊沉积物携带的磁信息研究表明,粗磁铁矿颗粒(MD)是主要载磁矿物颗粒,其pARM谱在低矫顽力区间(AF < 20 mT)达到最高值;而细磁铁矿颗粒(PSD-SD)为次要载磁颗粒,其pARM谱在高矫顽力区间(AF>20 mT)稍有突起。但是,剖面三个层位具有不同特征,上层(大约7.3~4.0 ka)的粗磁性矿物颗粒含量最高,下层(大约12.0~13.0 ka)次之,而中层(大约12.0~7.3 ka)相对最低;中层的细磁性颗粒含量最高,下层和上层的细磁性颗粒含量次之。pARM谱分析结果与磁滞曲线测量获得的磁畴结果一致。在较高的交变磁场区间获得的pARM可以有效地压抑粗磁颗粒的信息,进而使细磁颗粒的信号增强。应用pARM谱分析,能有效判别样品中磁性矿物的磁畴状态,有助于沉积物的古气候、岩石磁学和古地磁学研究。

     

  • 图  1  干海湖泊地质位置和全貌图[11]

    Figure  1.  Location and detail map of Ganhai Lake indicated by a blue circle

    图  2  干海湖泊剖面上层沉积物样品的pARM谱变化规律

    Figure  2.  Variations in pARM spectra for samples from the uppermost level

    图  3  干海湖泊剖面中层沉积物样品的pARM谱变化规律

    Figure  3.  Variations in pARM spectra for samples from the middle level

    图  4  中文干海湖泊剖面下层沉积物样品的pARM谱变化规律标题

    Figure  4.  Variations in pARM spectra for samples from the lowermost level

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出版历程
  • 收稿日期:  2017-02-06
  • 刊出日期:  2017-08-28

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