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TimberWolf
2005-Mar-04, 11:01 PM
Hello,

Does anyone know if NASA, the Russians or anyone else have done studies to determine what minerals are to be found there? I'm assuming that there was some chemical analysis of the soil done. Well, beyond ferric oxide, I'd like to know what else is in the dirt. :wink:

Cordially,



TimberWolf

aurora
2005-Mar-05, 08:18 AM
One of the more interesting minerals discovered so far was when Opportunity found jarosite.

See this press release (http://marsrovers.jpl.nasa.gov/newsroom/pressreleases/20040302a.html)

01101001
2005-Mar-05, 08:55 AM
Does anyone know if NASA, the Russians or anyone else have done studies to determine what minerals are to be found there? I'm assuming that there was some chemical analysis of the soil done. Well, beyond ferric oxide, I'd like to know what else is in the dirt.
It's probably still too early for a definitive list of every mineral seen by the MER rovers. NASA has dribbled out some press releases of certain interesting results, over the past year.

Google returned plenty of hits on the term: minerals martian soil. It's way more than what I care to wade through.

APXS Composition Results (http://nssdc.gsfc.nasa.gov/planetary/marspath/apxs.html) is a summary, still just a press release, and not a technical article of some of the minerals and elements seen during the Pathfinder mission. It references some tables of element composition and oxides here (http://nssdc.gsfc.nasa.gov/planetary/marspath/apxs_table1.html).

JonClarke
2005-Mar-05, 11:57 AM
Well, we have five sources of information - Terrestrial telescopic spectoscopy (many stduies, very regional in character), Martian meteorites (many studies), orbital spectoscopy, especially IR bands(Phobos 2, Mars Express, Mars Odyssey, Mars Global Surveyor), surface spectroscopy by IR and Mossbauer spectrometers (MER rovers), and caculated minerals from chemical compositions measured by landers using XRF and APX analyses (Vikings, Pathfinder, MERs).

I suggest you do a web search on martian minerals, but briefly a wide range of minerals have been identfied by all three means. they include primary igenous minerals common in terrestrial basalts (plagioclase, olivine, pyroxenes, garnet, apatite, magnetite, ilmenite etc.), plus a range of secondary minerals formed by aqueous alteration (Mg, Fe, and Ca sulphates, Na, Mg, Fe, and Ca chlorites, clays, Ca, Fe, and Mg carbonates (traces), haematite, maghaemite, goethite.

Cheers

Jon