Slave Craton

The Hackett River VMS deposits are hosted within the Ignerit Formation and are part Yellowknife Supergroup within the Slave Craton. The Ignerit Formation consists of highly silicified felsic volcanic rocks of calc-alkaline affinity that are intercalated with discontinuous lenses of calc-silicate that are interpreted to be tuffs... 

Sleeker, W. Hall, B. 2007 The Slave Craton Geologioal and Metallogenic... 

Siberia (Sobolev, 1974 Boyd et al, 1993) Jericho Slave craton (Kopylova et al, 1999)... 

Cr-poor variety widespread, locally abundant (e.g.. Monastery). Garnets, clino- and orthopyroxenes, phlogopite and ihnenite most common, zircon and olivine rarer. Debatable whether phlogopite and olivine are members of Cr-poor suite. Wide range in chemistry but Cr-poor, Fe-Ti-rich relative to type I (low-Z) peridotite minerals. Mineral chemistry and estimated equilibration P/Ts overlap those of type V (high-Z) Iherzolites. Some Slave craton Cr-poor megacrysts show mineral chemistry links to type II megacrystalline pyroxenite xenoliths. See review of Schulze (1987). 

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

Slave craton (Irvine et al, 1999,2003) which have all produced Archean Re-Os model ages. Some model ages range to in excess of 3.5 Ga but most are in the region between 2.7 Ga and 3.2 Ga (Figure 44). Archean ages are obtained from peridotites derived from well into the diamond stability field. 

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. and Russell J. K. (2000) Chemical stratification of cratonic lithosphere constraints from the Northern Slave craton, Canada. Earth Planet. Sci. Lett. 181, 71-87. 

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. 

Figure 12 Normative garnet Iherzolite mineral abundances (wt.%) versus rock Mg for low-temperature cratonic mantle. Data are open circles, Kaapvaal craton (Boyd and Mertzman, 1987 and references therein) filled diamonds, Tanzanian craton (Lee and Rudnick, 1999) open triangle, Siberian craton (Boyd et al., 1997) cross. Slave craton, northwest Canada (Kopylova and Russell, 2000) filled triangle, northern Canadian craton (Schmidberger and Francis, 1999) and inverted triangle, central Greenland craton (Bernstein et al., 1998).

Figure 18 Normative olivine and opx (garnet Uierzo-Ute norm) versus rock Mg showing low-T cratonic mantle relative to batch melt extraction trends from 3 GPa to 7 GPa (see Figure 6). Open circles are compositions from the Kaapvaal, Siberian, and Slave cratons, and the filled circles are compositions from the Tanzanian, Canadian, and Greenland cratons.

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. 

Heaman L. M., Creaser R. A., and Cookenboo H. O. (2002) Extreme enrichment of high field strength elements in Jericho eclogite xenoliths a cryptic record of Paleoproterozoic subduction, partial melting, and metasomatism beneath the Slave craton, Canada. Geology 30, 507 -510. 

Bottomley D. J., Katz A., Chan L. H., Starinsky A., Douglas M., Clark I. D., and Raven K. G. (1999) The origin and evolution of Canadian shield brines evaporite or freezing of seawater New lithium isotope and geochemical evidence from the Slave craton. Chem. Geol. 155, 295-320. 

Bostock, M. G. 1997. Anisotropic upper-mantle stratigraphy and architecture of the Slave craton. Nature, 390, 392-395. 

Table 1. PGE and Os isotope data for selected whole-rock peridotites from the Slave Craton, Namibia and Vitim... 

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).

Archaean tectonics a review, with illustrations from the Slave craton... 

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