Importance of Hematite Self-Reversal in Al-Rich Soils Magnetostratigraphy: Revisiting the Damei Red Soil Sequence in the Bose Basin, Southern China
文献类型：期刊论文
| 作者 | Liu, Caicai1; Qin, Huafeng2; Ferre, Eric C.3; Wang, Wei4; He, Kuang5,6,7; Deng, Chenglong2 |
| 刊名 | JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
 |
| 出版日期 | 2022-04-01 |
| 卷号 | 127期号:4页码:21 |
| 关键词 | self-reversal chemical remanence red soils Al-substituted hematite |
| ISSN号 | 2169-9313 |
| DOI | 10.1029/2021JB023165 |
| 英文摘要 | Understanding the acquisition of chemical remagnetization that commonly takes place in sedimentary red beds is crucial not only to assess the stability of primary chemical remanent magnetization (CRM) but also to evaluate the impact of diagenesis on the paleomagnetic record. The inconsistency between the magnetostratigraphy and the 0.803 Ma age of tektites within the upper vermiculated unit of a red soil sequence (Damei) in southern China strongly suggests pervasive remagnetization. This remagnetization has previously been interpreted as a CRM lock-in. However, our recent study suggests that the upper soil units of this section above the tektite-bearing layer have experienced milder weathering than the underlying layer. It seems that CRM lock-in has not completely overprinted the primary remanence of this section. To investigate the exact remagnetization mechanism, the magnetostratigraphy of the Damei sequence was revisited and the oriented samples were subjected to progressive thermal demagnetization up to 680 degrees C (instead of 585 degrees C in our previous study) by using a newly designed oven with ultralow magnetic field noise. The new demagnetization results for vermiculated and red clay samples document a high-temperature (HT) remanence component above 630 degrees C with some above 525 degrees C, and a self-reversal medium temperature (MT) component between 300 and 585 degrees C. The magnetic polarities of most HT components are consistent with the tektite age. The self-reversal MT component is carried by Al-substituted hematite transformed from Al-substituted maghemite. Self-reversal likely occurred during the maghemite to hematite transformation process. Additional attention should be paid when using magnetostratigraphy to date highly weathered aluminum-rich red sediments. |
| WOS关键词 | CHEMICAL REMANENT MAGNETIZATION ; DIFFUSE-REFLECTANCE SPECTROSCOPY ; TEMPERATURE-DEPENDENCE ; OXIDE MINERALS ; IRON-OXIDES ; ROCK ; GOETHITE ; BEDS ; LOESS ; SUSCEPTIBILITY |
| 资助项目 | National Natural Science Foundation of China[42074077] ; National Natural Science Foundation of China[41888101] ; Second Tibetan Plateau Scientific Expedition and Research (STEP)[2019QZKK0704] ; National Key R&D Program of China[2017YFC1500104] |
| WOS研究方向 | Geochemistry & Geophysics |
| 语种 | 英语 |
| WOS记录号 | WOS:000777490900001 |
| 出版者 | AMER GEOPHYSICAL UNION |
| 资助机构 | National Natural Science Foundation of China ; National Natural Science Foundation of China ; Second Tibetan Plateau Scientific Expedition and Research (STEP) ; Second Tibetan Plateau Scientific Expedition and Research (STEP) ; National Key R&D Program of China ; National Key R&D Program of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Second Tibetan Plateau Scientific Expedition and Research (STEP) ; Second Tibetan Plateau Scientific Expedition and Research (STEP) ; National Key R&D Program of China ; National Key R&D Program of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Second Tibetan Plateau Scientific Expedition and Research (STEP) ; Second Tibetan Plateau Scientific Expedition and Research (STEP) ; National Key R&D Program of China ; National Key R&D Program of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Second Tibetan Plateau Scientific Expedition and Research (STEP) ; Second Tibetan Plateau Scientific Expedition and Research (STEP) ; National Key R&D Program of China ; National Key R&D Program of China |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/105098]  |
| 专题 | 地质与地球物理研究所_岩石圈演化国家重点实验室 地质与地球物理研究所_中国科学院地球与行星物理重点实验室 |
| 通讯作者 | Liu, Caicai |
| 作者单位 | 1.China Earthquake Adm, State Key Lab Earthquake Dynam, Inst Geol, Beijing, Peoples R China 2.Chinese Acad Sci, State Key Lab Lithospher Evolut, Inst Geol & Geophys, Beijing, Peoples R China 3.Univ Louisiana Lafayette, Sch Geosci, Lafayette, LA 70504 USA 4.Shandong Univ, Inst Cultural Heritage, Qingdao, Peoples R China 5.Chinese Acad Sci, Key Lab Earth & Planetary Phys, Inst Geol & Geophys, Beijing, Peoples R China 6.Ocean Univ China, Frontiers Sci Ctr Deep Ocean Multispheres & Earth, Key Lab Submarine Geosci & Prospecting Tech, MoE, Qingdao, Peoples R China 7.Ocean Univ China, Coll Marine Geosci, Qingdao, Peoples R China |
| 推荐引用方式 GB/T 7714 | Liu, Caicai,Qin, Huafeng,Ferre, Eric C.,et al. Importance of Hematite Self-Reversal in Al-Rich Soils Magnetostratigraphy: Revisiting the Damei Red Soil Sequence in the Bose Basin, Southern China[J]. JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH,2022,127(4):21. |
| APA | Liu, Caicai,Qin, Huafeng,Ferre, Eric C.,Wang, Wei,He, Kuang,&Deng, Chenglong.(2022).Importance of Hematite Self-Reversal in Al-Rich Soils Magnetostratigraphy: Revisiting the Damei Red Soil Sequence in the Bose Basin, Southern China.JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH,127(4),21. |
| MLA | Liu, Caicai,et al."Importance of Hematite Self-Reversal in Al-Rich Soils Magnetostratigraphy: Revisiting the Damei Red Soil Sequence in the Bose Basin, Southern China".JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH 127.4(2022):21. |
入库方式： OAI收割
来源：地质与地球物理研究所
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