Directional chemical variations in diamonds showing octahedral following cuboid growth

Diamond growth from oxidized carbon sources beneath the Northern Slave Craton, Canada: A δ13C–N study of eclogite-hosted diamonds from the Jericho kimberlite

“…Other SIMS studies of intra-diamond variations in C-isotope composition locally show similar results (e.g. Bulanova et al, 2002;Hauri et al, 2002;Zedgenizov et al, 2006;Janson et al, 2008;Spetsius et al, 2009), suggesting that an oxidized growth medium may be common for diamond formation. Diamond growth from either carbonate melts or CO 2 -fluids is compatible with the multitude of fluid and micro-inclusion studies in diamond that invariably contain a carbonatite-like end-member (e.g.…”

“…Recent studies demonstrated the power of coupled cathodoluminescence (CL) imaging and secondary-ion mass spectrometry (SIMS) analyses of carbon isotope composition and nitrogen abundance in diamond, in order to determine both the growth history and nature of the fluids/melts involved in diamond formation (e.g. Harte et al, 1999;Bulanova et al, 2002;Schulze et al, 2004;Zedgenizov et al, 2006). Application of these micro-scale techniques to diamonds liberated from mantle xenoliths can provide powerful constraints on the formation of diamond in accessible 'natural laboratories'.…”

Defects in a mixed-habit Yakutian diamond: Studies by optical and cathodoluminescence microscopy, infrared absorption, Raman scattering and photoluminescence spectroscopy

“…Known associates of the 3107 cm À1 line were present at 1405, 2786 and 3257 cm À1 [15]; no additional features in cuboid growth, such as those described in Ref. [20], were detected.…”

Diffusion in diamond. I. Carbon isotope mapping of natural diamond

“…In other cases, gradual variations exist (e.g. Hauri et al, 2002;Zedgenizov et al, 2006); and in some cases there appear to be sharp changes in isotope composition between cross-cutting growth zones (e.g. Fitzsimons et al 1999;Schulze et al, 2004).…”