Siberian craton

Figure 38 Nd-Sr isotope variation of clinopyroxenes and garnet in peridotite xenoliths. (a) Compares cratonic and noncratonic peridotite xenoliths with continental crust. Inset shows restricted field for oceanic mantle. Arrow points to a peridotite from Lashaine, Tanzania, that lies at an Sr/ Sr value of 0.83. (b) Compares cratonic peridotites from the Kaapvaal, Wyoming, and Siberian cratons.

Boyd F. R., Pokhilenko N. P., Pearson D. G., Mertzman S. A., Sobolev N. V., and Finger L. W. (1997) Composition of the Siberian cratonic mantle evidence from Udachnaya peridotite xenoliths. Contrib. Mineral. Petrol. 128, 228-246. 

Richardson S. H. and Harris J. W. (1997) Antiquity of peridotitic diamonds from the Siberian Craton. Earth Planet. Sci. Lett. 151(3-4), 271-277. 

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).

Huh Y., Tsoi M.-Y., Zaitsev A., and Fdmond J. M. (1998) The fluvial geochemistry of the rivers of Eastern Siberia I. Tributaries of the Lena river draining the sedimentary platform of the Siberian Craton. Geochim. Cosmochim. Acta 62, 1657-1676. 

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). 

Composition of the Siberian cratonic mantle evidence from Udachnaya peridotite xeno-liths. Contributions to Mineralogy and Petrology, 128, 228-246. 

Pearson DG, Shirey SB, Carlson RW, Boyd FR, Pokhilenko NP, Shimizu N (1995) Re-Os, Sm-Nd, and Rb-Sr isotope evidence for thick Archaean lithospheric mantle beneath the Siberian craton modified by multistage metasomatism. Geochim Cosmochim Acta 59 959-977 Polyak BG, Tolstikhin IN, Kamensky IL, Yakolev LE, Marty B, Cheshko AL (2000) Helium isotopes, tectonics and heat flow in the Northern Caucasus. Geochim Cosmochim Acta 64 1925-1944... 

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