DOI: 10.1002/2015GL064678
论文题名: Grain growth and transformation of pedogenic magnetic particles in red Ferralsols
作者: Long X. ; Ji J. ; Balsam W. ; Barrõn V. ; Torrent J.
刊名: Geophysical Research Letters
ISSN: 0094-9132
EISSN: 1944-8863
出版年: 2015
卷: 42, 期: 14 起始页码: 5762
结束页码: 5770
语种: 英语
英文关键词: grain size
; hematite
; magnetic
; pedogenesis
Scopus关键词: Grain growth
; Grain size and shape
; Hematite
; Magnetism
; Soils
; Grain size
; Grain size distribution
; Magnetic
; Partial transformation
; Pedogenesis
; Pedogenic magnetic particles
; Single domain particles
; Superparamagnetic particles
; Magnetic bubbles
; accumulation rate
; concentration (composition)
; Ferralsol
; goethite
; grain size
; hematite
; pedogenesis
; red soil
英文摘要: Soil magnetism depends on the mineral composition and grain size distribution of magnetic particles. The accumulation of magnetic particles with different grain sizes has been found in the laboratory to precede the formation of hematite (Hm), which competes with goethite (Gt) in natural systems. To explore changes in the correlation between magnetic particles and Hm during pedogenesis, we focus on three representative red Ferrasol profiles with comparable total concentrations of iron oxides but different Hm/(Hm+Gt) ratios, from 0.14 to 0.74. Superparamagnetic particles and single-domain particles commonly become enriched as the concentration of Hm increases in the profiles. However, the accumulation rates of the particles decrease with Hm/(Hm+Gt) along the profiles. We attributed these changes to the simultaneous grain growth of pedogenic magnetic particles and their partial transformation into Hm once a large amount of pedogenic magnetic particles have accumulated in hematitic soils. © 2015. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84938952326&doi=10.1002%2f2015GL064678&partnerID=40&md5=2fd4a1f41f0cb9904b9f12f128d4e0a3
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/8748
Appears in Collections: 科学计划与规划 气候变化与战略
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作者单位: College of Geographical Science, Southwest University, Chongqing, China
Recommended Citation:
Long X.,Ji J.,Balsam W.,et al. Grain growth and transformation of pedogenic magnetic particles in red Ferralsols[J]. Geophysical Research Letters,2015-01-01,42(14).