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| Faculty ofEducation. Kochi University. Kochi 780 (Japan) LITHOS Kawasaki, T., 1987. Palaeogeotherms: ...orthopyroxene in equilibrium with garnet. In the iron-bearing systems, we cannot describe the phase relations...the garnet lherzolite stability field (D.H . Green and Ringwood, 1970). The spinel-bearing garnet Iherzolites...spinel lherzolite/garnet lherzolite boundary (D.H.Green and Ringwood, 1970). The diamond-bearing garnet...garnet lherzolite BD2125 (Dawson and Smith, 1975) equilibrated at 46.4± 1.0 kbar and 1082± 12°C, values which |
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| geothermometry and geobarometry applicable to garnet lherzolite are reviewed with reference to recent experimental...studies of the equilibration of natural garnet lherzolite and it is concluded that the Wells and Mori-Green...The geothermometers available for estimating lherzolite equilibration temperatures are discussed in some...CL = chromite lherzolite; G C L = garnet chromite lherzolite; G L = garnet lherzolite; GP = garnet pyroxenite...in their study of the solvus in natural garnet lherzolite compositions. We conclude that the present solvus |
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| peridotites (Fig. 3) adjoin the field for the garnet lherzolite paragenesis, but they differ from the garnets...garnets from plutonic xenoliths and inclusions in diamond from the Udachnaya pipe: 1) from cataclastic lherzolites...inclusions in diamond [11], 7) from intergrowths with diamond, 8) from ilmenite-bearing diamond-bearing...A. D., 1980, Mineralogy and origin of ilmenite-bearing lherzolites from the Udachnaya kimberlite pipe:...Marakushev, A. A., 1982, The volcanic nature of the diamond-bearing rocks in kimberlite pipes: Geologiya i geofizika |
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| met inclu‑ signs in diamonds and the diamond bearing lherzolite. Open diamonds, results from theCaO‑FeO‑MgO‑Al2O3‑SiO2...rescalts fromthe Mn‑Ni‑Cr‑Ti correction. Thegraphite‑diamond inversion curveisfromBundyetal. (1961) and Bundy(1980)...A. Jr. (1961),Diamond‑graphite equilibriumlinefrom growth and graphitiza tion of diamond. J. Chem. Phys...Gibb F.G.F. (1980), Geother ‑ mometry of garnet lherzolite nodules with specialreferenceto thosefrom the...Dawson, J.B. and Smith,J.V. (1975),Occurence of diamond in a mica‑garnet Iherzolite xenolith from kimberlite |
 | Pearson, D. G., Boyd, F. R., Haggerty, S. E., Pasteris, J. D., Field, S. W., Nixon, P. H., Pokhilenko, N. P. (1994) The characterisation and origin of graphite in cratonic lithospheric mantle: a petrological carbon isotope and Raman spectroscopic study. Contributions to Mineralogy and Petrology, 115 (4) 449-466 doi:10.1007/bf00320978 | Journal (article/letter/editorial) |
| Branch, Novosibirsk, Russia Abstract. Graphite-bearing peridotites, pyroxenites and eclogite xenoliths...range displayed by peridotite-suite graphite and diamond encompasses the carbon isotope range observed in...the fluids that deposited carbon, as graphite or diamond, in cratonic peridotites lies within the convecting...graphite within the mantle is very similar to that of diamond. It is unlikely that this restricted occurrence...systematics of peridotite-suite diamond inclusions suggest that diamond crystallisation was not directly |
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| analysis of garnet from a sheared phlogopite-garnet lherzolite from T h a b a Putsoa. Thompson (1975) recorded...50-1620(370i 210-7800(2000) 330-3800(2000) Lherzolite and ultramafic rocks Garnet Olivine Orthopyroxene...et al. 1976) are consistent with those for our diamond-free specimens, and in particular they fall close...granular lherzolites, kimberlite groundmass, and diamond inclusions; 0.04 (O 0.01), discrete nodule inclusions;...MacGregor 1975). The four orthopyroxene inclusions in diamond (Prinz et al. 1975) show no consistent pattern |
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| water content of minerals has shown that fertile lherzolite (MORB-source upper mantle) at ~1,000 °C can store...amphibole (pargasite) at P < 3 GPa up to the lherzolite solidus. However, at P > 3 GPa, water in excess...the vapour-undersaturated solidus of fertile lherzolite from 2.8 to 3 GPa provides the basis for understanding...the 1,430 °C adiabat with the vapour-saturated lherzolite solidus at ~230 km suggests that upwelling beneath...temperatures within the asthenosphere and the upwelling lherzolite is enriched in water, carbonate and incompatible |
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| c a t e / o r e g e o r ev Kimberlite-hosted diamond deposits of southern Africa: A review Matthew Field...April 2008 Keywords: Diamond Kimberlite Diatreme Pipe Dyke Mantle-xenolith Diamond-inclusion A B S T R...of diamonds. The formation of kimberlite-hosted diamond deposits is a long-lived and complex series of... Dating of inclusions in diamonds showed that diamond growth occurred several times over geological time...their geology, mantle xenolith, xenocryst and diamond characteristics and production statistics. These |
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| of Education, Kochi University Kochi 780 Japan 116 マ ン トル 鉱 物 の 熱 力 学 的 性 質 Fig.12 A-D. A...78]. Diamond bearing lherzolite (BD2125 [77]) is plotted inside the stability field for diamond [79,...80]. Spinel bearing garnet lherzolites (labelled sp) plot near the spinel/garnet lherzolite boundary. |
