younger age for oldest martian meteorite ancient martian meteorite cosmochemistry illustrated long...
Post on 21-Dec-2015
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![Page 1: Younger Age for Oldest Martian Meteorite Ancient Martian Meteorite COSMOCHEMISTRY iLLUSTRATED Long Geologic History Formation by crystal accumulation in](https://reader035.vdocuments.us/reader035/viewer/2022062320/56649d5c5503460f94a3b091/html5/thumbnails/1.jpg)
Younger Age for Oldest Martian MeteoriteYounger Age for Oldest Martian Meteorite
Ancient Martian Meteorite COSMOCHEMISTRY iLLUSTRATED
Long Geologic History
Formation by crystal accumulation in a magma chamber
Shocked and crushed by impact
Aqueous alteration and deposition of carbonate globules
Isotopic systems, hence ages, affected by shock and alteration
![Page 2: Younger Age for Oldest Martian Meteorite Ancient Martian Meteorite COSMOCHEMISTRY iLLUSTRATED Long Geologic History Formation by crystal accumulation in](https://reader035.vdocuments.us/reader035/viewer/2022062320/56649d5c5503460f94a3b091/html5/thumbnails/2.jpg)
Younger Age for Oldest Martian MeteoriteYounger Age for Oldest Martian Meteorite
Ancient Martian Meteorite COSMOCHEMISTRY iLLUSTRATED
Igneous formation age of ALH84001 is 4.09 Ga, much younger than the previously-reported Sm-Nd age of 4.50 Ga.
![Page 3: Younger Age for Oldest Martian Meteorite Ancient Martian Meteorite COSMOCHEMISTRY iLLUSTRATED Long Geologic History Formation by crystal accumulation in](https://reader035.vdocuments.us/reader035/viewer/2022062320/56649d5c5503460f94a3b091/html5/thumbnails/3.jpg)
Younger Age for Oldest Martian Younger Age for Oldest Martian MeteoriteMeteorite
Ancient Martian Meteorite COSMOCHEMISTRY iLLUSTRATED
Next step: Reconcile igneous, impact, and alteration events recorded in ALH84001 with ages of impact basins on Mars.