Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
8910392 | Chemical Geology | 2018 | 39 Pages |
Abstract
Besides the highly economic kimberlite-hosted diamond deposits of Late Devonian age (e.g., Mir and Udachnaya), the Siberian craton also contains significant Mesozoic placer diamond deposits (e.g., along the Anabar river), for which lamproite sources have been suggested recently. Our study shows that mantle-derived zircon megacryst fragments from the Ebelyakh placer deposit have Late Triassic ages of ca. 224â¯Ma. Their long-term depleted Hf isotopic compositions (+8.5 εHf) suggest that the alluvial diamonds were sourced from asthenosphere-derived Triassic kimberlites rather than from lithospheric mantle derived isotopically enriched lamproites.
Related Topics
Physical Sciences and Engineering
Earth and Planetary Sciences
Geochemistry and Petrology
Authors
Jing Sun, Sebastian Tappe, Sergey I. Kostrovitsky, Chuan-Zhou Liu, Sergey Yu. Skuzovatov, Fu-Yuan Wu,