Showing papers by "Gary R. Huss published in 1995"
TL;DR: In this article, diamond and SiC were found in unmetamorphosed members of all seven chondrite classes and evidence for graphite was found in Orgued (CI) and LL3.1 chondrites.
366 citations
01 Sep 1995
TL;DR: In this paper, the same general N features are seen in presolar SiC from many meteorites, clear differences between meteorites have also been observed, and Murchison SiC appears to have systematically higher N/N/14)N ratios than Orgueil SiC.
Abstract: Nitrogen in presolar SiC varies over a wide range of concentrations and is typically ^(14)N-rich relative to solar N, consistent with ^(15)N being consumed during CNO processing in stellar envelopes [e.g., 1]. Although C is also heavily processed in the envelopes [1], no clear isotopic correlation exists between C and N [e.g., 2], making N compositions difficult to interpret. Although the same general N features are seen in SiC from many meteorites, clear differences between meteorites have also been observed. In particular, Murchison SiC appears to have systematically higher ^(15)N/^(14)N ratios than Orgueil SiC [2,3]. Among ISN-poor SiC grains for both meteorites, ^(15)N/^(14)N and ^(28)Si/^(l4)N exhibit a positive correlation (Fig. 1).
2 citations