Characterizing magnetofossils from first‐order reversal curve (FORC) central ridge signatures
Abstract The central ridge structure of a first‐order reversal curve (FORC) distribution is indicative of uniaxial noninteracting single domain magnetic particles, which provides the opportunity to identify and characterize biogenic magnetic mineral remains (magnetofossils) in sediments. Recent stud...
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| Format: | Article |
| Language: | English |
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Wiley
2014-06-01
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| Series: | Geochemistry, Geophysics, Geosystems |
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| Online Access: | https://doi.org/10.1002/2014GC005291 |
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| author | David Heslop Andrew P. Roberts Liao Chang |
| author_facet | David Heslop Andrew P. Roberts Liao Chang |
| author_sort | David Heslop |
| collection | DOAJ |
| description | Abstract The central ridge structure of a first‐order reversal curve (FORC) distribution is indicative of uniaxial noninteracting single domain magnetic particles, which provides the opportunity to identify and characterize biogenic magnetic mineral remains (magnetofossils) in sediments. Recent studies have shown that magnetofossils are widespread in the geological record and that they carry useful environmental information and contribute to paleomagnetic recording, which makes it essential to quantify how these biogenic components contribute to the magnetic properties of sediments. We present results from six sedimentary sequences whose magnetic mineral assemblages contain a significant magnetofossil contribution. Using principal component analysis, we find that the central ridge properties exhibit both intra‐sequnce and inter‐sequence variability that may be ascribed to external environmental factors. While samples from individual sediment sequences tend to cluster together, there is a continuum of inter‐sequence behavior that appears to be related to a variety of magnetofossil properties. We demonstrate the complexity of biogenic magnetic components in sedimentary environments, but also the power and potential of FORC central ridges for understanding magnetic mixtures and unraveling environmental information. |
| format | Article |
| id | doaj-art-cf89436e804f4a4e89882388d0f27a38 |
| institution | OA Journals |
| issn | 1525-2027 |
| language | English |
| publishDate | 2014-06-01 |
| publisher | Wiley |
| record_format | Article |
| series | Geochemistry, Geophysics, Geosystems |
| spelling | doaj-art-cf89436e804f4a4e89882388d0f27a382025-08-20T02:35:19ZengWileyGeochemistry, Geophysics, Geosystems1525-20272014-06-011562170217910.1002/2014GC005291Characterizing magnetofossils from first‐order reversal curve (FORC) central ridge signaturesDavid Heslop0Andrew P. Roberts1Liao Chang2Research School of Earth SciencesAustralian National UniversityCanberra ACT AustraliaResearch School of Earth SciencesAustralian National UniversityCanberra ACT AustraliaResearch School of Earth SciencesAustralian National UniversityCanberra ACT AustraliaAbstract The central ridge structure of a first‐order reversal curve (FORC) distribution is indicative of uniaxial noninteracting single domain magnetic particles, which provides the opportunity to identify and characterize biogenic magnetic mineral remains (magnetofossils) in sediments. Recent studies have shown that magnetofossils are widespread in the geological record and that they carry useful environmental information and contribute to paleomagnetic recording, which makes it essential to quantify how these biogenic components contribute to the magnetic properties of sediments. We present results from six sedimentary sequences whose magnetic mineral assemblages contain a significant magnetofossil contribution. Using principal component analysis, we find that the central ridge properties exhibit both intra‐sequnce and inter‐sequence variability that may be ascribed to external environmental factors. While samples from individual sediment sequences tend to cluster together, there is a continuum of inter‐sequence behavior that appears to be related to a variety of magnetofossil properties. We demonstrate the complexity of biogenic magnetic components in sedimentary environments, but also the power and potential of FORC central ridges for understanding magnetic mixtures and unraveling environmental information.https://doi.org/10.1002/2014GC005291First‐order reversal curvesmagnetofossilssedimentary magnetism |
| spellingShingle | David Heslop Andrew P. Roberts Liao Chang Characterizing magnetofossils from first‐order reversal curve (FORC) central ridge signatures Geochemistry, Geophysics, Geosystems First‐order reversal curves magnetofossils sedimentary magnetism |
| title | Characterizing magnetofossils from first‐order reversal curve (FORC) central ridge signatures |
| title_full | Characterizing magnetofossils from first‐order reversal curve (FORC) central ridge signatures |
| title_fullStr | Characterizing magnetofossils from first‐order reversal curve (FORC) central ridge signatures |
| title_full_unstemmed | Characterizing magnetofossils from first‐order reversal curve (FORC) central ridge signatures |
| title_short | Characterizing magnetofossils from first‐order reversal curve (FORC) central ridge signatures |
| title_sort | characterizing magnetofossils from first order reversal curve forc central ridge signatures |
| topic | First‐order reversal curves magnetofossils sedimentary magnetism |
| url | https://doi.org/10.1002/2014GC005291 |
| work_keys_str_mv | AT davidheslop characterizingmagnetofossilsfromfirstorderreversalcurveforccentralridgesignatures AT andrewproberts characterizingmagnetofossilsfromfirstorderreversalcurveforccentralridgesignatures AT liaochang characterizingmagnetofossilsfromfirstorderreversalcurveforccentralridgesignatures |