WFRF:(Tikoo S. M.)
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- Yang, H.Stanford University (author)
Preliminary Characterization of Submarine Basalt Magnetic Mineralogy Using Amplitude-Dependence of Magnetic Susceptibility
- Article/chapterEnglish2024
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- 2024
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- LIBRIS-ID:oai:lup.lub.lu.se:48a83050-fb32-4fb5-a7e4-211cff0165f2
- https://lup.lub.lu.se/record/48a83050-fb32-4fb5-a7e4-211cff0165f2URI
- https://doi.org/10.1029/2023GC011222DOI
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- Language:English
- Summary in:English
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- The past ∼200 million years of Earth's geomagnetic field behavior have been recorded within oceanic basalts, many of which are only accessible via scientific ocean drilling. Obtaining the best possible paleomagnetic measurements from such valuable samples requires an a priori understanding of their magnetic mineralogies when choosing the most appropriate protocol for stepwise demagnetization experiments (either alternating field or thermal). Here, we present a quick, and non-destructive method that utilizes the amplitude-dependence of magnetic susceptibility to screen submarine basalts prior to choosing a demagnetization protocol, whenever conducting a pilot study or other detailed rock-magnetic characterization is not possible. We demonstrate this method using samples acquired during International Ocean Discovery Program Expedition 391. Our approach is rooted in the observation that amplitude-dependent magnetic susceptibility is observed in basalt samples whose dominant magnetic carrier is multidomain titanomagnetite (∼TM60–65, (Ti0.60–0.65Fe0.35–0.40)Fe2O4). Samples with low Ti contents within titanomagnetite or samples that have experienced a high degree of oxidative weathering do not display appreciable amplitude dependence. Due to their low Curie temperatures, basalts that possess amplitude-dependence should ideally be demagnetized either using alternating fields or via finely-spaced thermal demagnetization heating steps below 300°C. Our screening method can enhance the success rate of paleomagnetic studies of oceanic basalt samples.
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- Tikoo, S. M.Stanford University (author)
- Carvallo, C.Paris-Sorbonne University (author)
- Bilardello, D.University of Minnesota (author)
- Solheid, P.University of Minnesota (author)
- Gaastra, K. M.University of Houston,California Institute of Technology (author)
- Sager, W. W.University of Houston (author)
- Thoram, S.University of Houston (author)
- Hoernle, K.GEOMAR Helmholtz Centre for Ocean Research Kiel (author)
- Höfig, T. W.Texas A and M University (author)
- Avery, A.University of South Florida (author)
- Del Gaudio, A. V.Karl-Franzens-University of Graz (author)
- Huang, Y.Yangtze University (author)
- Bhutani, R. (author)
- Buchs, D. M.Cardiff University (author)
- Class, C.Lamont-Doherty Earth Observatory (author)
- Dai, Y.Lund University,Lunds universitet,Kvartärgeologi,Geologiska institutionen,Naturvetenskapliga fakulteten,Quaternary Sciences,Department of Geology,Faculty of Science(Swepub:lu)yu3547da (author)
- Dalla Valle, G.CNR Istituto per le Tecnologie Applicate ai Beni Culturali (CNR-ITABC) (author)
- Fielding, S.University of Namibia (author)
- Han, S.Gwangju Institute of Science and Technology (author)
- Heaton, D. E.Oregon State University (author)
- Homrighausen, S.GEOMAR Helmholtz Centre for Ocean Research Kiel (author)
- Kubota, Y.Pennsylvania State University (author)
- Li, C. F. (author)
- Nelson, W. R. (author)
- Petrou, E.University of Oxford (author)
- Potter, K. E.Utah State University (author)
- Pujatti, S.University of Calgary (author)
- Scholpp, J.University of Tennessee (author)
- Shervais, J. W.Utah State University (author)
- Tshiningayamwe, M.University of Namibia (author)
- Wang, X. J.Northwest University (China) (author)
- Widdowson, M.University of Hull (author)
- Stanford UniversityParis-Sorbonne University (creator_code:org_t)
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- In:Geochemistry, Geophysics, Geosystems25:21525-2027
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- Yang, H.
- Tikoo, S. M.
- Carvallo, C.
- Bilardello, D.
- Solheid, P.
- Gaastra, K. M.
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- Sager, W. W.
- Thoram, S.
- Hoernle, K.
- Höfig, T. W.
- Avery, A.
- Del Gaudio, A. V ...
- Huang, Y.
- Bhutani, R.
- Buchs, D. M.
- Class, C.
- Dai, Y.
- Dalla Valle, G.
- Fielding, S.
- Han, S.
- Heaton, D. E.
- Homrighausen, S.
- Kubota, Y.
- Li, C. F.
- Nelson, W. R.
- Petrou, E.
- Potter, K. E.
- Pujatti, S.
- Scholpp, J.
- Shervais, J. W.
- Tshiningayamwe, ...
- Wang, X. J.
- Widdowson, M.
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