Thermochemical remanent magnetization in Jurassic silicic volcanics from Nevada, U.S.A.
dc.contributor.author | Geissman, John W. | en_US |
dc.contributor.author | Van der Voo, Rob | en_US |
dc.date.accessioned | 2006-04-07T17:23:40Z | |
dc.date.available | 2006-04-07T17:23:40Z | |
dc.date.issued | 1980-07 | en_US |
dc.identifier.citation | Geissman, J. W., Van der Voo, R. (1980/07)."Thermochemical remanent magnetization in Jurassic silicic volcanics from Nevada, U.S.A.." Earth and Planetary Science Letters 48(2): 385-396. <http://hdl.handle.net/2027.42/23211> | en_US |
dc.identifier.uri | http://www.sciencedirect.com/science/article/B6V61-473M7NM-3J/2/a9e1aee9a0cbfa352efc8d4ff4df7653 | en_US |
dc.identifier.uri | https://hdl.handle.net/2027.42/23211 | |
dc.description.abstract | Characteristic magnetizations from Middle Jurassic dacitic to andesitic subaerial volcanics (the Fulstone and Artesia Formations) in the Buckskin Mountain Range, western central Basin and Range Province, are well-grouped, generally display univectorial decays to the origin in demagnetization and have hematite blocking temperatures restricted almost entirely to above 620[deg]C. Petrographic, rock magnetic and electron microprobe investigations confirm that nearly pure hematite is the essential magnetic phase (up to about 10 vol. %) occurring as a replacement of coarse titaniferous magnetite phenocrysts and fine groundmass particles, as a secondary alteration product of ferromagnesian phenocrysts and as a mobilized phase filling cracks and other open spaces. The presence of antipodal directions in each flow unit and in interbedded volcanoclastic units (some having retained magnetite as a major magnetic phase) and magnetite-dominated remanences in time-equivalent intrusives cutting the flows indicates that the volcanics acquired their hematite remanence, a faithful record of the geomagnetic field, in high-temperature, deuteric oxidation during and following their emplacement, not during a later thermal event such as regional metamorphism. The remanence is probably a thermochemical remanent magnetization, although part may be of thermoremanent origin. | en_US |
dc.format.extent | 885783 bytes | |
dc.format.extent | 3118 bytes | |
dc.format.mimetype | application/pdf | |
dc.format.mimetype | text/plain | |
dc.language.iso | en_US | |
dc.publisher | Elsevier | en_US |
dc.title | Thermochemical remanent magnetization in Jurassic silicic volcanics from Nevada, U.S.A. | en_US |
dc.type | Article | en_US |
dc.rights.robots | IndexNoFollow | en_US |
dc.subject.hlbsecondlevel | Geology and Earth Sciences | en_US |
dc.subject.hlbtoplevel | Science | en_US |
dc.description.peerreviewed | Peer Reviewed | en_US |
dc.contributor.affiliationum | Department of Geology, University of Toronto, Toronto, Ont. M5S 1A1, Canada; Department of Geological Sciences, University of Michigan, Ann Arbor, MI 48109, U.S.A. | en_US |
dc.contributor.affiliationum | Department of Geological Sciences, University of Michigan, Ann Arbor, MI 48109, U.S.A. | en_US |
dc.description.bitstreamurl | http://deepblue.lib.umich.edu/bitstream/2027.42/23211/1/0000140.pdf | en_US |
dc.identifier.doi | http://dx.doi.org/10.1016/0012-821X(80)90203-4 | en_US |
dc.identifier.source | Earth and Planetary Science Letters | en_US |
dc.owningcollname | Interdisciplinary and Peer-Reviewed |
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