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    Correlations between magnetic anomalies and surface geology antipodal to lunar impact basins

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    Richmond_et_al-2005-Journal_of ...
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    Author
    Richmond, N. C.
    Hood, L. L.
    Binder, A. B.
    Affiliation
    Univ Arizona, Lunar & Planetary Lab
    Issue Date
    2005
    Keywords
    lunar swirls
    magnetic anomaly
    statistical correlation
    
    Metadata
    Show full item record
    Publisher
    AMER GEOPHYSICAL UNION
    Citation
    Correlations between magnetic anomalies and surface geology antipodal to lunar impact basins 2005, 110 (E5) Journal of Geophysical Research
    Journal
    Journal of Geophysical Research
    Rights
    Copyright 2005 by the American Geophysical Union.
    Collection Information
    This item from the UA Faculty Publications collection is made available by the University of Arizona with support from the University of Arizona Libraries. If you have questions, please contact us at repository@u.library.arizona.edu.
    Abstract
    Previous work has shown that the strongest concentrations of lunar crustal magnetic anomalies are located antipodal to four large, similarly aged impact basins (Orientale, Serenitatis, Imbrium, and Crisium). Here, we report results of a correlation study between magnetic anomaly clusters and geology in areas antipodal to Imbrium, Orientale, and Crisium. Unusual geologic terranes, interpreted to be of seismic or ejecta origin associated with the antipodal basins, have been mapped antipodal to both Orientale and Imbrium. All three antipode regions have many high-albedo swirl markings. Results indicate that both of the unusual antipode terranes and Mare Ingenii (antipodal to Imbrium) show a correlation with high-magnitude crustal magnetic anomalies. A statistical correlation between all geologic units and regions of medium to high magnetization when high-albedo features are present (antipodal to Orientale) may suggest a deep, possibly seismic origin to the anomalies. However, previous studies have provided strong evidence that basin ejecta units are the most likely sources of lunar crustal anomalies, and there is currently insufficient evidence to differentiate between an ejecta or seismic origin for the antipodal anomalies. Results indicate a strong correlation between the high-albedo markings and regions of high magnetization for the Imbrium, Orientale, and Crisium antipodes. Combined with growing evidence for an Imbrian age to the magnetic anomalies, this supports a solar wind deflection origin for the lunar swirls.
    Note
    6 month embargo; Version of record online: 28 May 2005
    ISSN
    0148-0227
    DOI
    10.1029/2005JE002405
    Version
    Final published version
    Sponsors
    Processing and mapping of the Lunar Prospector magnetometer data were supported by the NASA Lunar Data Analysis Program through a contract from the Lunar Research Institute.
    Additional Links
    http://doi.wiley.com/10.1029/2005JE002405
    ae974a485f413a2113503eed53cd6c53
    10.1029/2005JE002405
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