publication . Article . 2009

Origins of magnetite nanocrystals in Martian meteorite ALH84001

K.L. Thomas-Keprta; S.J. Clemett; D.S. McKay; E.K. Gibson; S.J. Wentworth;
Open Access
  • Published: 01 Nov 2009
Abstract
Abstract The Martian meteorite ALH84001 preserves evidence of interaction with aqueous fluids while on Mars in the form of microscopic carbonate disks. These carbonate disks are believed to have precipitated 3.9 Ga ago at beginning of the Noachian epoch on Mars during which both the oldest extant Martian surfaces were formed, and perhaps the earliest global oceans. Intimately associated within and throughout these carbonate disks are nanocrystal magnetites (Fe 3 O 4 ) with unusual chemical and physical properties, whose origins have become the source of considerable debate. One group of hypotheses argues that these magnetites are the product of partial thermal d...
Subjects
free text keywords: Geochemistry and Petrology, Martian, Thermal decomposition, Noachian, Mars Exploration Program, Nanocrystal, Geology, Carbonate, chemistry.chemical_compound, chemistry, Geochemistry, Magnetite, Meteorite
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publication . Article . 2009

Origins of magnetite nanocrystals in Martian meteorite ALH84001

K.L. Thomas-Keprta; S.J. Clemett; D.S. McKay; E.K. Gibson; S.J. Wentworth;