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dc.contributor.authorPilkington, M.
dc.contributor.authorAmes, D. E.
dc.contributor.authorHildebrand, A. R.
dc.date.accessioned2021-02-12T20:56:44Z
dc.date.available2021-02-12T20:56:44Z
dc.date.issued2004-01-01
dc.identifier.citationPilkington, M., Ames, D. E., & Hildebrand, A. R. (2004). Magnetic mineralogy of the Yaxcopoil‐1 core, Chicxulub. Meteoritics & Planetary Science, 39(6), 831-841.
dc.identifier.issn1945-5100
dc.identifier.doi10.1111/j.1945-5100.2004.tb00933.x
dc.identifier.urihttp://hdl.handle.net/10150/655846
dc.description.abstractCore from the Yaxcopoil-1 (Yax-1) hole, drilled as a result of the Chicxulub Scientific Drilling Project (CSDP), has been analyzed to investigate the relationship between opaque mineralogy and rock magnetic properties. Twenty one samples of suevite recovered from the depth range 818-894 m are generally paramagnetic, with an average susceptibility of 2000 x 10^(-6) SI and have weak remanent magnetization intensities (average 0.1 A/m). The predominant magnetic phase is secondary magnetite formed as a result of low temperature (<150 degrees C) alteration. It occurs in a variety of forms, including vesicle infillings associated with quartz and clay minerals and fine aggregates between plagioclase/diopside laths in the melt. Exceptional magnetic properties are found in a basement clast (metamorphosed quartz gabbro), which has a susceptibility of >45000 x 10^(-6) SI and a remanent magnetization of 77.5 A/m. Magnetic mafic basement clasts are a common component in the Yax-1 impactite sequence. The high susceptibility and remanence in the mafic basement clasts are caused by the replacement of amphiboles and pyroxenes by an assemblage with fine <1 micrometer magnetite, ilmenite, K-feldspar, and stilpnomelane. Replacement of the mafic minerals by the magnetic alteration assemblage occurred before impact. Similar alteration mechanisms, if operative within the melt sheet, could explain the presence of the high amplitude magnetic anomalies observed at Chicxulub.
dc.language.isoen
dc.publisherThe Meteoritical Society
dc.relation.urlhttps://meteoritical.org/
dc.rightsCopyright © The Meteoritical Society
dc.rights.urihttp://rightsstatements.org/vocab/InC/1.0/
dc.subjectmagnetic properties
dc.subjectMagnetic anomalies
dc.subjectChicxulub
dc.titleMagnetic mineralogy of the Yaxcopoil-1 core, Chicxulub
dc.typeArticle
dc.typetext
dc.identifier.journalMeteoritics & Planetary Science
dc.description.collectioninformationThe Meteoritics & Planetary Science archives are made available by the Meteoritical Society and the University of Arizona Libraries. Contact lbry-journals@email.arizona.edu for further information.
dc.eprint.versionFinal published version
dc.description.admin-noteMigrated from OJS platform February 2021
dc.source.volume39
dc.source.issue6
dc.source.beginpage831
dc.source.endpage841
refterms.dateFOA2021-02-12T20:56:44Z


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