“…Among the many relevant analyses in the literature, the following are representative: lherzolite xenoliths from Lesotho kimberlites (Nixon 1973, plots (Boyd & Nixon 1975)); megacrysts from the Monastery and Bellsbank kimberlites (Gurney et al 1979;Boctor & Boyd 1982); coarse and deformed lherzolite and deformed harzburgites in the Premier kimberlite, South Africa (Danchin & Boyd 1976;Danchin 1979); garnet peridotites in a Montana kimberlite (Hearn & Boyd 1975); Cr-rich and Cr-poor megacrysts in Colorado-Wyoming kimberlites (Eggler et al 1979); megacrysts in the Fayette County kimberlite, Pennsylvania (Hunter & Taylor 1984); cataclastic peridotites, megacrysts and groundmass in the Udachnaya and Obnazhennaya pipes, Siberia (Kostrovitskiy & Fiveyskaya 1983, analyses of Al, Ca, Ti, Mn, Co, Cu, Ni, Zn); collection of many data for kimberlites in the U.S.S.R. (Sobolev 1977); spinel peridotites and wehrlites in alkali basalts at Eifel, West Germany, San Carlos and Kilbourne Hole, U.S.A., and Mongolia (Stosch 1981, analyses of Sc, Cr, Co and Ni); spinel lherzolite and harzburgite in basanite at Kapfenstein, Austria (Kurat et al 1980, analyses of Al, Ca, Sc, Ti, Cr, Mn, Co, Ni, Zn); ultramafic xenoliths in alkali basalts at San Quintin, Baja California (Basu 1979, analyses of Sr); peridotites in Ngopetsoeu and Lipelaneng kimberlites, Lesotho (Carswell et al 1984); spinel peridotites in Lherz and Freychinede ultramafic bodies, France (Conquer^ & Fabries 1984); Benfontein kimberlite, South Africa (McMahon & Haggerty 1984); inclusions in diamonds from the Orapa and Roberts Victor kimberlites (Gurney et al 1984a, b); garnet lherzolites in Hanaus-I and Louwrensia kimberlites, Namibia (Mitchell 1984); Arkansas lamproite (Scott Smith & Skinner 1984); Orroroo kimberlites, Australia ; garnet peridotites with zoned garnets in The Thumb minette (Smith & Ehrenberg 1984); garnet lherzolites in Bow Hill basalt, Tasmania (Sutherland et al 1984).…”