Silicon Carbide From a Carbon Nodule in the Canyon Diablo Meteorite

Details Silicon Carbide From a Carbon Nodule in the Canyon Diablo Meteorite Silicon Carbide From a Carbon Nodule in the Canyon Diablo Meteorite

Dec 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011agufm.p43a1655l&link_type=abstract

American Geophysical Union, Fall Meeting 2011, abstract #P43A-1655

Other

[6015] Planetary Sciences: Comets And Small Bodies / Dust, [6022] Planetary Sciences: Comets And Small Bodies / Impact Phenomena, [6240] Planetary Sciences: Solar System Objects / Meteorites And Tektites

Scientific paper

The Canyon Diablo Meteorite fell in the Arizona desert 50,000 years ago, giving rise to the well-preserved Meteor Crater. Irons of various sizes were scattered around the crater rim and on the surrounding plains. We studied a rusty specimen containing a carbon nodule. We dug out small blocks of sooty carbon by means of a sharp tungsten carbide tip. These carbon materials contain traces of silicon carbide (SiC) and diamond/lonsdaleite. We report here our findigs of two groups of SiC grains. (1) Relatively large crystals, about 80-90 microns in size. Their colors are in shades of blue, green and neutral. One of the grains are composed of a cluster of 3 crystals of the 3C polytype, whereas, 7 other individual crystals are of hexagonal structure. All crystals in this group have dark, rounded resorption rims. (2) Small crystals, about 30-50 microns in size. They are pale blue in color, and they lack dark-colored rims. These two distinct groups probably have different modes of origin. The large crystals seem to be early-formed, but had been reheated or partially melted, as indicated by the bead-like rims. The complexities displayed by these SiC crystals might have resulted from a long residence time in the meteorite while it was still in space. Their origin might be akin to that of SiC occurring in carbonaceous chondrites and interplanetary dust particles.

Affiliated with

Also associated with

No associations

Rating

Silicon Carbide From a Carbon Nodule in the Canyon Diablo Meteorite does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Silicon Carbide From a Carbon Nodule in the Canyon Diablo Meteorite, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Silicon Carbide From a Carbon Nodule in the Canyon Diablo Meteorite will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-871942