Article
 

Particle Size-Specific Magnetic Measurements as a Tool for Enhancing Our Understanding of the Bulk Magnetic Properties of Sediments

Pubblico Deposited

Contenuto scaricabile

Scarica il pdf
https://ir.library.oregonstate.edu/concern/articles/vm40xt34z

Descriptions

Attribute NameValues
Creator
Abstract
  • Bulk magnetic properties of soils and sediments are often sensitive proxies for environmental change but commonly require interpretation in terms of the different sources of magnetic minerals (or components) that combine to generate them. Discrimination of different components in the bulk magnetic record is often attempted through endmember unmixing and/or high resolution measurements that can require intensive measurement plans, assume linear additivity, and sometimes have difficulty in discriminating a large number of sources. As an alternative, magnetic measurements can be made on isolated sediment fractions that constitute the bulk sample. When these types of measurements are taken, heterogeneity is frequently observed between the magnetic properties of different fractions, suggesting different magnetic components often associate with different physical grain sizes. Using a particle size-specific methodology, individual components can be isolated and studied and bulk magnetic properties can be linked to, and isolated from, sedimentological variations. Deconvolving sedimentary and magnetic variability in this way has strong potential for increased understanding of how magnetic fragments are carried in natural systems, how they vary with different source(s), and allows for a better assessment of the effect environmental variability has in driving bulk magnetic properties. However, despite these benefits, very few studies exploit the information they can provide. Here, I present an overview of the different sources of magnetic minerals, why they might associate with different sediment fractions, how bulk magnetic measurements have been used to understand the contribution of different components to the bulk magnetic record, and outline how particle size-specific magnetic measurements can assist in their better understanding. Advantages and disadvantages of this methodology, their role alongside bulk magnetic measurements, and potential future directions of research are also discussed.
  • Keywords: magnetic susceptibility, particle size, environmental magnetism, sediment, magnetic properties, magnetic grain size
Resource Type
DOI
Date Available
Date Issued
Citation
  • Hatfield, R. G. (2014). Particle Size-Specific Magnetic Measurements as a Tool for Enhancing Our Understanding of the Bulk Magnetic Properties of Sediments. Minerals, 4(4), 758-787. doi:10.3390/min4040758
Journal Title
Journal Volume
  • 4
Journal Issue/Number
  • 4
Dichiarazione dei diritti
Funding Statement (additional comments about funding)
  • Robert G. Hatfield would like to acknowledge support from the National Science Foundation through a Paleo Perspectives on Climate Change Grant ARC-0902751 to Joseph S. Stoner and Anders E. Carlson and an Ocean Drilling Program Grant OCE-1260671 to Robert G. Hatfield and Joseph S. Stoner.
Publisher
Peer Reviewed
Language
Replaces

Le relazioni

Parents:

This work has no parents.

Elementi

Thumbnail Titolo Data caricata Visibilità Azioni
file details HatfieldRobertCEOASParticleSize-Specific.pdf 2017-07-26 Pubblico Scaricare