Rapid Identification of Greigite in Lacustrine Sediments Using SIRM/χ and χARM: Insights From the Cuo E Core, Tibetan Plateau, China
文献类型：期刊论文
| 作者 | Ding, Shengchang3,4,5,6; Dekkers, Mark J.2; Li, Mingkun1; Zhao, Qi4,5,6; Yan, Yi4,5,6; Zhu, Zhaoyu4,5,6 |
| 刊名 | EARTH AND SPACE SCIENCE
 |
| 出版日期 | 2024-09-01 |
| 卷号 | 11期号:9页码:16 |
| 关键词 | greigite CE core Tibetan Plateau SIRM/chi paleomagnetic |
| DOI | 10.1029/2024EA003508 |
| 英文摘要 | The Cuo E (CE) core contains the entire Quaternary stratigraphy of the CE Lake (31 degrees 24 '-31 degrees.32 ' N, 91 degrees 28 '-91 degrees 33 ' E, Tibetan Plateau, China). Here, we study the magnetic properties of 1,748 samples from the CE core, combined with scanning electron microscopy and X-ray energy dispersive spectrometer analysis on selected samples. The main magnetic minerals appear to be magnetite and greigite. To further quantify the presence of greigite in CE core, 84 samples were analyzed using rock magnetism in more detail including: susceptibility (chi) versus temperature, coercivity component analysis of acquisition curves of the isothermal remanent magnetization (IRM), and principal component analysis of the first-order reversal curve (FORC) diagrams. The greigite content and saturation IRM over susceptibility (SIRM/chi) appear to be exponentially related. SIRM/chi can be used as greigite concentration indicator. We also propose a rapid way to identify greigite in the CE core: When SIRM/chi increases and anhysteretic remanent susceptibility (chi(ARM)) increases only slowly, the sample contains greigite. Samples with SIRM/chi < 15 kA/m also follow this relation. This greigite detection method has a lower limit of detection than the traditionally used SIRM/chi parameter. It is also faster than FORC analysis and thus particularly suitable for analysis of large sample collections. Twenty greigite-bearing layers were identified in the CE core using this method. The location of the Jaramillo subchron in the CE core is controversial in the currently available magnetostratigraphy, possibly related to the presence of greigite in this core interval. |
| WOS研究方向 | Astronomy & Astrophysics ; Geology |
| 语种 | 英语 |
| WOS记录号 | WOS:001303706600001 |
| 源URL | [http://ir.gig.ac.cn/handle/344008/80635]  |
| 专题 | 同位素地球化学国家重点实验室 |
| 通讯作者 | Yan, Yi; Zhu, Zhaoyu |
| 作者单位 | 1.South China Normal Univ, Sch Geog, Guangzhou, Peoples R China 2.Univ Utrecht, Dept Earth Sci, Paleomagnet Lab Ft Hoofddijk, Utrecht, Netherlands 3.Univ Chinese Acad Sci, Coll Earth & Planetary Sci, Beijing, Peoples R China 4.Chinese Acad Sci, Guangzhou Inst Geochem, Key Lab Ocean & Marginal Sea Geol, Guangzhou, Peoples R China 5.CAS Ctr Excellence Deep Earth Sci, Guangzhou, Peoples R China 6.Chinese Acad Sci, Guangzhou Inst Geochem, State Key Lab Isotope Geochem, Guangzhou, Peoples R China |
| 推荐引用方式 GB/T 7714 | Ding, Shengchang,Dekkers, Mark J.,Li, Mingkun,et al. Rapid Identification of Greigite in Lacustrine Sediments Using SIRM/χ and χARM: Insights From the Cuo E Core, Tibetan Plateau, China[J]. EARTH AND SPACE SCIENCE,2024,11(9):16. |
| APA | Ding, Shengchang,Dekkers, Mark J.,Li, Mingkun,Zhao, Qi,Yan, Yi,&Zhu, Zhaoyu.(2024).Rapid Identification of Greigite in Lacustrine Sediments Using SIRM/χ and χARM: Insights From the Cuo E Core, Tibetan Plateau, China.EARTH AND SPACE SCIENCE,11(9),16. |
| MLA | Ding, Shengchang,et al."Rapid Identification of Greigite in Lacustrine Sediments Using SIRM/χ and χARM: Insights From the Cuo E Core, Tibetan Plateau, China".EARTH AND SPACE SCIENCE 11.9(2024):16. |
入库方式： OAI收割
来源：广州地球化学研究所
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