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Magnetic response to pedogenesis in aerobic soils of different weathering degree

文献类型：期刊论文

作者Liu, Caicai3; Dupont-Nivet, Guillaume4,5,6; Wang, Wei2; Deng, Chenglong1
刊名PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY
出版日期2021-04-01
卷号567页码:16
关键词Mineral magnetism Red soils Weathering China
ISSN号0031-0182
DOI10.1016/j.palaeo.2021.110240
英文摘要Magnetic parameters are widely used to indicate paleoclimatic and paleoenvironmental conditions in sedimentary records. However, the relations between magnetic parameters and paleoclimate conditions are very different depending on the weathering degree. This study explores various multidisciplinary parameters across an intensely weathered red soil section in the Bose Basin (the Damei sequence with layers of different weathering intensity) of subtropical southern China to understand the magnetic mineral response to pedogenesis in aerobic soils. We find that the only commonly used environmental magnetic parameter that correlates well with geochemical indices of weathering intensity, is the S-ratio (a measure of the relative amounts of high-coercivity remanence to low-coercivity remanence). HIRM (the absolute amount of high-coercivity remanence) and -IRM0.3T (the absolute amount of low-coercivity remanence) are the main variable in S-ratio. Mineral magnetic analyses indicate that the main carriers of HIRM and -IRM-(0.3T) in the Damei red soils are respectively hematite and maghemite. Negative correlations between the S-ratio, the IRM-(0.3T) and the weathering intensity, and a positive correlation between the HIRM and the weathering intensity relates to the transformation of pedogenic maghemite into hematite which is favored in such a case of intense weathering. It seems that environmental interpretations from magnetic parameters are better constrained if the weathering stage can be first determined using the relation between concentration of hematite and ferrimagnetic minerals. A new magnetic weathering index is proposed for intensely weathered red soils based on the slope of the linear correlation between HIRM and -IRM-(0.3T). These results open applications for assessing weathering and pedoclimate proxies using environmental magnetism.
资助项目National Key R&D Program of China[2017YFC1500104] ; Second Tibetan Plateau Scientific Expedition and Research (STEP) grant[2019QZKK0704] ; National Natural Science Foundation of China[41622204] ; National Natural Science Foundation of China[41761144071] ; National Natural Science Foundation of China[41474053] ; Marie-Curie CIG Hiresdat grant ; A. von Humboldt foundation ; ERC MAGIC project ; NSFC[41690112] ; NSFC[41621004]
WOS研究方向Physical Geography ; Geology ; Paleontology
语种英语
WOS记录号WOS:000636761000011
出版者ELSEVIER
资助机构National Key R&D Program of China ; National Key R&D Program of China ; Second Tibetan Plateau Scientific Expedition and Research (STEP) grant ; Second Tibetan Plateau Scientific Expedition and Research (STEP) grant ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Marie-Curie CIG Hiresdat grant ; Marie-Curie CIG Hiresdat grant ; A. von Humboldt foundation ; A. von Humboldt foundation ; ERC MAGIC project ; ERC MAGIC project ; NSFC ; NSFC ; National Key R&D Program of China ; National Key R&D Program of China ; Second Tibetan Plateau Scientific Expedition and Research (STEP) grant ; Second Tibetan Plateau Scientific Expedition and Research (STEP) grant ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Marie-Curie CIG Hiresdat grant ; Marie-Curie CIG Hiresdat grant ; A. von Humboldt foundation ; A. von Humboldt foundation ; ERC MAGIC project ; ERC MAGIC project ; NSFC ; NSFC ; National Key R&D Program of China ; National Key R&D Program of China ; Second Tibetan Plateau Scientific Expedition and Research (STEP) grant ; Second Tibetan Plateau Scientific Expedition and Research (STEP) grant ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Marie-Curie CIG Hiresdat grant ; Marie-Curie CIG Hiresdat grant ; A. von Humboldt foundation ; A. von Humboldt foundation ; ERC MAGIC project ; ERC MAGIC project ; NSFC ; NSFC ; National Key R&D Program of China ; National Key R&D Program of China ; Second Tibetan Plateau Scientific Expedition and Research (STEP) grant ; Second Tibetan Plateau Scientific Expedition and Research (STEP) grant ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Marie-Curie CIG Hiresdat grant ; Marie-Curie CIG Hiresdat grant ; A. von Humboldt foundation ; A. von Humboldt foundation ; ERC MAGIC project ; ERC MAGIC project ; NSFC ; NSFC
源URL[http://ir.iggcas.ac.cn/handle/132A11/101093]  
专题地质与地球物理研究所_岩石圈演化国家重点实验室
通讯作者Liu, Caicai
作者单位1.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, Beijing 100029, Peoples R China
2.Shandong Univ, Inst Cultural Heritage, 72 Jimo Binhai Rd, Qingdao 266237, Peoples R China
3.China Earthquake Adm, State Key Lab Earthquake Dynam, Inst Geol, Beijing 100029, Peoples R China
4.Univ Rennes 1, Geosci Rennes, CNRS, UMR 6118, Campus Beaulieu, F-35042 Rennes, France
5.Peking Univ, Key Lab Orogen Belts & Crustal Evolut, Minist Educ, Beijing 100871, Peoples R China
6.Potsdam Univ, Inst Geosci, Karl Liebknecht Str 24, D-14476 Potsdam, Germany
推荐引用方式
GB/T 7714		 Liu, Caicai,Dupont-Nivet, Guillaume,Wang, Wei,et al. Magnetic response to pedogenesis in aerobic soils of different weathering degree[J]. PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY,2021,567:16.
APA Liu, Caicai,Dupont-Nivet, Guillaume,Wang, Wei,&Deng, Chenglong.(2021).Magnetic response to pedogenesis in aerobic soils of different weathering degree.PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY,567,16.
MLA Liu, Caicai,et al."Magnetic response to pedogenesis in aerobic soils of different weathering degree".PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY 567(2021):16.

入库方式： OAI收割

来源：地质与地球物理研究所

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