Item talk:Q310429

{

 "USGS Publications Warehouse": {
   "@context": "https://schema.org",
   "@type": "Article",
   "additionalType": "Journal Article",
   "name": "Magnetic effects of maghemitization of oceanic crust",
   "identifier": [
     {
       "@type": "PropertyValue",
       "propertyID": "USGS Publications Warehouse IndexID",
       "value": "70197171",
       "url": "https://pubs.usgs.gov/publication/70197171"
     },
     {
       "@type": "PropertyValue",
       "propertyID": "USGS Publications Warehouse Internal ID",
       "value": 70197171
     },
     {
       "@type": "PropertyValue",
       "propertyID": "DOI",
       "value": "10.1029/JB086iB05p04009",
       "url": "https://doi.org/10.1029/JB086iB05p04009"
     }
   ],
   "journal": {
     "@type": "Periodical",
     "name": "Journal of Geophysical Research B: Solid Earth",
     "volumeNumber": "86",
     "issueNumber": "B5"
   },
   "inLanguage": "en",
   "isPartOf": [
     {
       "@type": "CreativeWorkSeries",
       "name": "Journal of Geophysical Research B: Solid Earth"
     }
   ],
   "datePublished": "1981",
   "dateModified": "2018-05-18",
   "abstract": "Both theoretical considerations and available experimental results indicate that magnetic effects of maghemitization are strongly dependent on the grain size of the originally unoxidized titanomagnetite. Maghemitization of single\u2010domain titanomagnetite results in a decrease in coercivity, an increase in susceptibility, and a large decrease in\u00a0Q\u00a0ratio. Maghemitization of multidomain titanomagnetite results in an increase in coercivity, a decrease in susceptibility, and no large changes in\u00a0Q\u00a0ratio. Single\u2010domain titanomagnetite is probably resistant to the development of a chemical remanent magnetization (CRM), whereas multidomain titanomagnetite can acquire a CRM during maghemitization. The behavior of pseudo\u2010single\u2010domain titanomagnetite, which is the main carrier of remanence in submarine extrusive rocks, is investigated by comparing the magnetic properties of the French\u2010American Mid\u2010Ocean Undersea Study (FAMOUS) (less than 0.1 m.y. old) and the Leg 37 (3.5 m.y. old) pillow basalts recovered from the Mid\u2010Atlantic Ridge near 37\u00b0N. Combining electron microprobe analyses, Curie temperature measurements, and cell edge determinations, we find that the FAMOUS rocks are already oxidized (z\u00a0= 0.38), possibly as a result of some high\u2010temperature maghemitization during cooling of the magma. Comparison with the more highly oxidized (z\u00a0= 0.7) Leg 37 pillow basalts indicates that low\u2010temperature maghemitization of such rocks does not result in appreciable changes of coercivity and susceptibility, although the\u00a0Q\u00a0ratio does decrease and CRM seems to be acquired. Such a CRM could account for the anomalously low magnetic inclinations observed at most of the Leg 37 sites.",
   "description": "12 p.",
   "publisher": {
     "@type": "Organization",
     "name": "AGU"
   },
   "author": [
     {
       "@type": "Person",
       "name": "Prevot, M.",
       "givenName": "M.",
       "familyName": "Prevot"
     },
     {
       "@type": "Person",
       "name": "Lecaille, A.",
       "givenName": "A.",
       "familyName": "Lecaille"
     },
     {
       "@type": "Person",
       "name": "Mankinen, Edward A. emank@usgs.gov",
       "givenName": "Edward A.",
       "familyName": "Mankinen",
       "email": "emank@usgs.gov",
       "identifier": {
         "@type": "PropertyValue",
         "propertyID": "ORCID",
         "value": "0000-0001-7496-2681",
         "url": "https://orcid.org/0000-0001-7496-2681"
       },
       "affiliation": [
         {
           "@type": "Organization",
           "name": "Geology, Minerals, Energy, and Geophysics Science Center",
           "url": "https://www.usgs.gov/centers/gmeg"
         }
       ]
     }
   ],
   "funder": [
     {
       "@type": "Organization",
       "name": "Geology, Minerals, Energy, and Geophysics Science Center",
       "url": "https://www.usgs.gov/centers/gmeg"
     }
   ]
 }

}