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Carbon isotope compositions and the distribution of nitrogen and hydrogen in diamonds from 18 eclogites from Nurbinskaya kimberlites were studied in situ in polished plates. Cathodoluminescence images show that most of the diamonds have complex growth structures with distinctive core, intermediate and rim zones. In some diamonds the cores display dissolution features, and intermediate growth zones...
Garnet xenocrysts and eclogite xenoliths from 15 kimberlites (1.0–1.1 Ga in age) have been used to map the composition and structure of the lithospheric mantle along an 80-km traverse across the eastern margin of the Closepet Granite in Andhra Pradesh. The SCLM at the SW end of the traverse is more depleted (abundant harzburgites, mean X Mg of olivine ≈93.5, mean whole-rock Al 2 O...
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