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Extreme chemical variation in complex diamonds from George Creek, Colorado, a SIMS study of carbon isotope composition and nitrogen abundance

Fitzsimons, I; Harte, B; Chinn, I L; Gurney, J; Taylor, Wayne R


Diamonds from George Creek, Colorado, preserve complex intergrowth textures between two major growth generations: homogeneous diamond with yellow-buff cathodoluminescence (CL); and diamond with blue-green CL and local growth zonation. Secondary-ion mass spectrometry (SIMS) has revealed large variations in N concentration and C isotope composition within these diamonds. Even within single stones, N contents and δ13C values can vary from 0 to 750 ppm and 0 to -20‰ respectively. These variations...[Show more]

CollectionsANU Research Publications
Date published: 1999
Type: Journal article
Source: Mineralogical Magazine


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