Search results for "Taenite"
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Der meteorit von Breitscheid—III petrographische untersuchung
1959
Abstract The meteorite of Breitscheid is a grey-veined bronzite-olivine-chondrite containing nickel-iron and troilite. It has a remarkably high volume of pores of about 10 per cent. The density of the solid is 3·7, of the stone as a whole 3.3. The chondrules take about 20 per cent of the volume of the stone. The ore minerals are: nickel-iron (kamacite and taenite), troilite, chromite, ilmenite and besides, in the melting crust, magnetite. Especially ilmenite—until recently doubtful as a constituent of meteorites—could be proved in a convincing manner. The silicate constituents are: olivine, bronzite, clinopyroxene, plagioclase (?), glass and a few minerals which could not be identified. The…
Evidence for mechanical and chemical alteration of iron-nickel meteorites on Mars: Process insights for Meridiani Planum
2011
The weathering of meteorites found on Mars involves chemical and physical processes that can provide clues to climate conditions at the location of their discovery. Beginning on sol 1961, the Opportunity rover encountered three large iron meteorites within a few hundred meters of each other. In order of discovery, these rocks have been assigned the unofficial names Block Island, Shelter Island, and Mackinac Island. Each rock presents a unique but complimentary set of features that increase our understanding of weathering processes at Meridiani Planum. Significant morphologic characteristics interpretable as weathering features include (1) a large pit in Block Island, lined with delicate iro…