new martian meteorite: northwest africa (nwa 7034)
DESCRIPTION
New Martian Meteorite: Northwest Africa (NWA 7034). Courtesy Carl Agee. Meteorite NWA 7034 is a breccia, with minerals and rock fragments set in a fine-grained glassy matrix. Evidence for a Martian Origin. - PowerPoint PPT PresentationTRANSCRIPT
http://www.psrd.hawaii.edu/Jan13/NWA7034.html
New Martian Meteorite:New Martian Meteorite:Northwest Africa (NWA 7034)Northwest Africa (NWA 7034)
Meteorite NWA 7034 is a breccia, with minerals and rock fragments set in a fine-grained glassy matrix.
http://www.psrd.hawaii.edu/Jan13/NWA7034.html
Evidence for a Martian OriginEvidence for a Martian Origin
Mn and Fe concentrations in pyroxene is an effective way to distinguish rocks from different planetary bodies. Note that the data for NWA 7034 fall along the line defined by Martian meteorites.
http://www.psrd.hawaii.edu/Jan13/NWA7034.html
New Martian Meteorite is Similar toNew Martian Meteorite is Similar toTypical Martian CrustTypical Martian Crust
TAS diagram for classification of igneous rocks. NWA 7034 falls with rocks and soils from the surface and mean surface measured from orbit (GRS) Martian meteorites (SNC) are depleted in alkalis.
http://www.psrd.hawaii.edu/Jan13/NWA7034.html
Distinctive Mantle Source RegionDistinctive Mantle Source Region
NWA 7034 has different REE abundances and pattern, and slightly different oxygen isotopic compositions compared to known Martian meteorites.
http://www.psrd.hawaii.edu/Jan13/NWA7034.html
NWA 7034 Older Than Most Martian MeteoritesNWA 7034 Older Than Most Martian Meteorites
Martian meteorite ages ALH 84001: 4100 MaNWA 7034: 2089 MaNakhlites & Chassigny: 1300 MaShergottites: 170-575 Ma