气候变化领域集成服务门户(CCPortal): Continental-scale magnetic properties of surficial Australian soils

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DOI	10.1016/j.earscirev.2019.103028
	Continental-scale magnetic properties of surficial Australian soils
	Hu P.; Heslop D.; Viscarra Rossel R.A.; Roberts A.P.; Zhao X.
发表日期	2020
ISSN	0012-8744
卷号	203
英文摘要	Soil magnetism reflects the physical properties of mainly iron oxide and oxyhydroxide minerals, which provides important information for deciphering soil environments. Establishing national scale soil magnetic databases can provide important reference information that can assist mineral surveying and agricultural planning. Our aims are to provide visualizations and to describe multiple magnetic properties across Australia, to evaluate the relationship between soil magnetism and soil forming factors, and to interpret the mechanisms responsible for surface soil magnetism in Australia. We present the first surficial Australian soil magnetic database, which contains 471 topsoil samples of natural and unpolluted materials. The samples were characterized with detailed magnetic measurements, which show that the magnetic properties of Australian soils vary considerably, but most surficial soils have small concentrations of coarse-grained magnetic minerals. The vast central Australian interior is characterized by weak magnetism, with more hematite and goethite contribution. Strong magnetic hotspots occur in the northwestern plateau, Nullarbor Plain, and eastern highlands. Parent material acts as the dominant control on soil magnetic properties, influencing magnetic mineral concentration and grain size, and controlling the contribution and relative importance of hematite to goethite. Temperature and rainfall both have a weak negative influence on superfine ferrimagnetic particles, due to progressive transformation to hematite and particle migration driven by intensive rainfall in sandy soils. Biota and land use changes tend to have a more complex and integrated local influence on hematite and goethite formation and preservation. © 2019 Elsevier B.V.
英文关键词	Magnetic properties; Soil forming factors; Surficial Australian soil
语种	英语
来源期刊	EARTH-SCIENCE REVIEWS
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/209673
作者单位	Research School of Earth Sciences, Australian National University, Canberra, ACT 2601, Australia; School of Molecular and Life Sciences, Faculty of Science and Engineering, Curtin University, GPO Box U1987, Perth, WA 6845, Australia
推荐引用方式 GB/T 7714	Hu P.,Heslop D.,Viscarra Rossel R.A.,et al. Continental-scale magnetic properties of surficial Australian soils[J],2020,203.
APA	Hu P.,Heslop D.,Viscarra Rossel R.A.,Roberts A.P.,&Zhao X..(2020).Continental-scale magnetic properties of surficial Australian soils.EARTH-SCIENCE REVIEWS,203.
MLA	Hu P.,et al."Continental-scale magnetic properties of surficial Australian soils".EARTH-SCIENCE REVIEWS 203(2020).