Show simple item record

dc.contributor.authorHalekas, J. S.
dc.contributor.authorLin, R. P.
dc.contributor.authorMitchell, D. L.
dc.date.accessioned2021-02-12T20:56:08Z
dc.date.available2021-02-12T20:56:08Z
dc.date.issued2003-01-01
dc.identifier.citationHalekas, J. S., Lin, R. P., & Mitchell, D. L. (2003). Magnetic fields of lunar multi‐ring impact basins. Meteoritics & Planetary Science, 38(4), 565-578.
dc.identifier.issn1945-5100
dc.identifier.doi10.1111/j.1945-5100.2003.tb00027.x
dc.identifier.urihttp://hdl.handle.net/10150/655682
dc.description.abstractWe survey the magnetic fields of lunar multi-ring impact basins using data from the electron reflectometer instrument on the Lunar Prospector spacecraft. As for smaller lunar craters, the primary signature is a magnetic low that extends to ~1.5-2 basin radii, suggesting shock demagnetization of relatively soft crustal magnetization. A secondary signature, as for large terrestrial basins, is the presence of central magnetic anomalies, which may be due to thermal remanence in impact melt rocks and/or shock remanence in the central uplift. The radial extent of the anomalies may argue for the former possibility, but the latter or a combination of the two are also possible. Central anomaly fields are absent for the oldest pre-Nectarian basins, increase to a peak in early Nectarian basins, and decrease to a low level for Imbrian basins. If basin-associated anomalies provide a good indication of ambient magnetic fields when the basins formed, this suggests the existence of a "magnetic era" (possibly due to a lunar core dynamo) similar to that implied by paleointensity results from returned lunar samples. However, the central basin anomalies suggest that the fields peaked in early Nectarian times and were low in Imbrian times, while samples provide evidence for high fields in Nectarian and early Imbrian times.
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 fields
dc.subjectMoon
dc.subjectCrustal magnetization
dc.subjectLunar Prospector spacecraft
dc.subjectImpact basin
dc.titleMagnetic fields of lunar multi-ring impact basins
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.volume38
dc.source.issue4
dc.source.beginpage565
dc.source.endpage578
refterms.dateFOA2021-02-12T20:56:08Z


Files in this item

Thumbnail
Name:
14795-17131-1-PB.pdf
Size:
624.7Kb
Format:
PDF

This item appears in the following Collection(s)

Show simple item record