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Hf Isotope Systematics of Kimberlites and their Megacrysts: New Constraints on their Source Regions |
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| Authors: | NOWELL G M; PEARSON D G; BELL D R; CARLSON R W; SMITH C B; KEMPTON P D; NOBLE S R |
| Institution: | 1 ARTHUR HOLMES ISOTOPE GEOLOGY LABORATORY, DEPARTMENT OF EARTH SCIENCES, DURHAM UNIVERSITY, SOUTH ROAD, DURHAM DH1 3LE, UK 2 ARIZONA STATE UNIVERSITY, CHEMISTRY AND BIOLOGY, PO BOX 871604, TEMPE, AZ 85287, USA 3 CARNEGIE INSTITUTION OF WASHINGTON, 5241 BROAD BRANCH ROAD NW, WASHINGTON, DC 20015, USA 4 DEBEERS CONSOLIDATED MINES, GEOSCIENCE CENTRE, PO BOX 82232, SOUTHDALE GAUTENG 2135, SOUTH AFRICA 5 NERC ISOTOPE GEOSCIENCES LABORATORY, KINGSLEY DUNHAM CENTRE, KEYWORTH, NOTTINGHAM NG12 5HH, UK |
| Abstract: | Kimberlites from Southern Africa, along with their low-Cr megacrysts,have unusual Hf–Nd isotopic characteristics. Group I andTransitional kimberlites define arrays trending oblique to,and well below, the Nd–Hf isotope ‘mantle array’,defined by oceanic basalts, i.e. they have negative |
| Keywords: | : isotopes kimberlites lutetium– hafnium megacrysts |
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