 | | Journal (article/letter/editorial) | | 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 |  | | Journal (article/letter/editorial) | | images; c) TiK α x-ray scan; d) AlK α x-ray scan. peridotite xenoliths, as well as the average composition...peridotites (Fig. 3) adjoin the field for the garnet lherzolite paragenesis, but they differ from the garnets...olivine is higher than in the olivine of the garnet peridotite xenoliths (f = 9.36-12.99%). It has been found...TABLE 1. Chemical Compositions of Cataclastic Peridotite Xenoliths from the Udachnaya Kimberlite Pipe...garnets from plutonic xenoliths and inclusions in diamond from the Udachnaya pipe: 1) from cataclastic lherzolites |  | 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...within the mantle. Thermobarometry on the graphite-peridotite assemblages using a variety of element partitions...diamonds from peridotite xenoliths, and is identical to that of diamonds containing peridotite-suite inclusions...The isotopic range displayed by peridotite-suite graphite and diamond encompasses the carbon isotope range...the fluids that deposited carbon, as graphite or diamond, in cratonic peridotites lies within the convecting |  | | Journal (article/letter/editorial) | | analytical techniques has enabled the study of mantle peridotite compositions and of magmas derived by melting...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 |  | | Journal (article/letter/editorial) | | P and Ti in garnet, pyroxene and olivine from peridotite and eclogite xenoliths from African kimberlites...P and Ti in garnet, pyroxene and olivine from peridotite and eclogite xenoliths from African kimberlites...and Ti in garnet, pyroxenes and olivine from peridotite and eclogite xenoiiths from African kimberlites...analysis of garnet from a sheared phlogopite-garnet lherzolite from T h a b a Putsoa. Thompson (1975) recorded... m O t- i ox i,o LITHOS 11 (1978) 163 Peridotite and eclogite xenoliths Table 3. Range and mean |  | | Journal (article/letter/editorial) | | 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 |  | | Journal (article/letter/editorial) | | 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 |  | | Journal (article/letter/editorial) | | 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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