Kimberlites Slave Craton

Cratonic peridotite xenoliths from Lesotho, S. Africa, the Jericho kimberlite, Slave craton, and Somerset Island, Churchill Province, northern Canada, along with selected samples from... 

Davies R. M., Griffin W. L., Pearson N. J., Andrew A. S., Doyle B. J., and O Reilly S. Y. (1999) Diamonds from the deep pipe DO-27, Slave Craton, Canada. In The J. B. Dawson Volume Proceedings of the Vllth International Kimberlite Conference (eds. J. J. Gurney, J. L. Gurney, M. D. Pascoe, andS. H. Richardson). Red Roof Designs, Cape Town, vol. 1,... 

Irvine G. J., Carlson R. W., Kopylova M. G., Pearson D. G., Shirey S. B., and Kjarsgaard B. A. (1999) Age of the lithospheric mantle beneath and around the Slave craton a rhenium-osmium isotopic study of peridotite xenoliths from the Jericho and Somerset Island kimberlites. In Abst. Ninth Annual V. M. Goldschmidt Conference LPI contribution no. 971. Lunar and Planetary Institute, Houston, pp. 134-135. 

Kopylova M. G., Russell J. K., and Cookenboo H. (1999) Petrology of peridotite and pyroxenite xenoliths from the Jericho kimberlite implications for the thermal state of the mantle beneath the Slave craton, northern Canada. J. Petrol. 40, 79-104. 

Carbno G. B. and Canil D. (2002) Mantle structure beneath the SW Slave craton, Canada constraints from garnet geochemistry in the Drybones bay kimberlite. 7. Petrol. 43, 129-142. 

To illustrate the appUcation of these methods we have analysed selected samples from different suites of cratonic peridotites for PGE abundances and Re-Os isotopic composition that had been previously analysed for major elements (Table 1). The sample set comprises three peridotites from the Jericho kimberlite, Northern Slave Craton (Irvine et al. 1999 Kopylova Russell 2000) two peridotites from the Kaapvaal Craton (Pearson et al. 1995a Carlson et al. 1999) three peridotites from the Farm Louwrencia kimberlite, Southern Namibia, on the periphery of the Kaapvaal Craton (Pearson et al. 1994, 1998a Hoal et al. 1995 Frantz et al. 1996) three peridotites from the Vitim alkali basalt field, on the southern margin of the Siberian Craton (Ionov et al. 1993 Pearson et al. 19986). 

Fig. 5. Histogram of Trd ages for peridotites from the Jericho kimberlite, Nothern Slave Craton. Data from Irvine et al. (2001).

Fig. 6. Chondrite-normalized PGE patterns of whole-rock peridotites from the Jericho kimberlite. Northern Slave Craton and for Kaapvaal peridotites. Data from Table 1. Normalizing values taken from McDonald et al. (1995).

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