 | | Report (issue) | | Mg3 Cr3+ 2 (SiO4 )3 Knorringite c 2001 ° Crystal Data: Mineral Data Publishing, version 1.2 Cubic...= 11.65 Z=8 X-ray Powder Pattern: Kao kimberlite pipe, Lesotho. 2.92 (100), 2.61 (100), 2.382 (80)...Total 100.68 100.00 33.54 26.68 (1) Kao kimberlite pipe, Lesotho; by electron microprobe, corresponding...Polymorphism & Series: Mineral Group: Occurrence: Lesotho). Forms a series with pyrope. Garnet group. ...rare component of ultrama¯c kimberlite nodules (Kao kimberlite pipe, Association: Olivine, enstatite |  | | Journal (article/letter/editorial) | | DECEMBER, 1968 A NEW CHROMIUM GARNET END MEMBER, KNORRINGITE, FROM KIMBERLITE PnrBn H. NrxoNl aNl GeoncB HonnuNc...electron probe confirms that a garnet from Kao kimberlite pipe in Lesotho contains a large proportion of the...component Mg3Cr2(SiO4)s. This is now called knorringite and thus replaces the name hanleite which has...has been discredited (:uvarovite). The garnet from Kao, with 17.4TaCrsos, is green, o: 11.65,n:1.803, G...pyrope from E9 lherzolite nodule from Liqhobong, Lesotho, gave 5.14 percent CrzOr and a full analysis of |  | | Journal (article/letter/editorial) | | dichroic green-violet varieties from the Kao pipe in Lesotho [2]. This paper establishes the Newlands...[1 ]. Comparisons of the Newlands, Yakutian and Kao green garnets are given in Fig. 1A, B and show that:...different from the xenocrysts of Zagadochnaya and Kao; (b) the green garnet from the Sytikanskaya wehflite...and Ca; (c) the knorringitic green garnets from Kao form a compact grouping distinctly different from...Newlands and most of those from Yakutia. Since the Kao garnets plot (Fig. 1A) on a direct continuation of |  | | Journal (article/letter/editorial) | | Unusually Fe- and Ni-rich macrocrysts unique to the Lace mine are from Fe-rich orthopyroxene-bearing peridotites...inhabituels riches en Fe et en Ni provenant de la mine Lace semblent uniques; ils se sont formés à partir...Star, 11 Lace, 12 Jagersfontein, 13 Liqhobong and Kao, 14 Monastery. Craton boundaries after de Wit et...Frank Smith, Monastery in South Africa, Kao and Liqhobong in Lesotho, and Jwaneng, Letlhakane and Orapa in...(primarily 0.5–1.0 mm), with a few from the Lace mine in the range 3.0–4.0 mm. In addition, approximately |  | | Journal (article/letter/editorial) | | Andradite Uvarovite Goldmanite Kimzeyite Schorlomite Knorringite Majorite Calderite Hibschite Katoite I Table...carbonatites and alftali-rich igneous rocks. Knorringite, Mg,Cr,(Si04)3-a rare species of dark green chromium-rich...pyrope, 16.4% uvarovite, 8.5% almandine, 4.1% knorringite, and 2.2% other components. In addition to the...manganese minerals from the Tachgagalt manganese mine, Morocco (Gaudefroy et al., 1969). The minerals...responsible for the green color of uvarovite and knorringite but also helps to produce the deep red and purplish-red |  | | Journal (article/letter/editorial) | | pyrope and grossularite solid solution series. Knorringite, (MgaCr2Si301~), and uvarovite (Ca3Cr2S%012)...for the chromium contents in those garnets. Knorringite, however, is not found as a natural mineral and...deep-seated process in the mantle. I n contrast to knorringite-bearing garnets, almost pure uvarovite, CaaCr~SiaOl~...open squares, Cr-bearing garnets from the Kao kimberlite, Lesotho Nixon and ttornung, 1968; ttornung and...Uvarovite-Grossularite Solid Solution 229 sularite-knorringite-uvarovite solid solutions) occur in ultramafic |  | | Report (issue) | | cm tall andradite on hematite is from the Wessels Mine near Hotazel in northern Cape Province, South Africa...Cover: Grossular on diopside; 7.1 cm tall Jeffrey Mine, Asbestos, Richmond County, Quebec, Canada Paul...Calderite Goldmanite Hibschite Katoite Kimzeyite Knorringite Majorite Morimotoite Schorlomite Chemical Formula...Spessartine, schorl, and a/bite from the Little Three Mine in San Diego County, California; 6. 6 cm tall; Bryant...uranium-vanadium deposit of the Sandy Mine in the Laguna District, New Mexico, is the type locality for |  | | Journal (article/letter/editorial) | | The Netherlands 443 I31 SYNTHESIS OF PYROPE-KNORRINGITE SOLID SOLUTION SERIES A E RINGWOOD Research School...molecule. In a study o f garnets from the Kao klmberhte pipe, Lesotho, Nlxon and Hormmg [1 ] discovered a garnet...parameters and refractive radices of pyrope-knorringite solid solutions Composition Lattice parameter...synthesis and characterization of the pyrope-knorringite series. Without further data upon the P, T stability |  | Grew, E. S., Locock, A. J., Mills, S. J., Galuskina, I. O., Galuskin, E. V., Hålenius, U. (2013) Nomenclature of the garnet supergroup. American Mineralogist, 98 (4) 785-811 doi:10.2138/am.2013.4201 | Journal (article/letter/editorial) | | V2 Si3 O12 2+ 3+ Momoiite Mn 3 V2 Si3 O12 3+ Knorringite Mg3 Cr 2 Si3 O12 3+ Uvarovite Ca3 Cr 2 Si3...calcite (white) in the holotype specimen from Wessels Mine, South Africa. Swedish Museum of Natural History...on chromite, from the type locality, Saranovskii Mine, Permskaya Oblast, Middle Urals, Russia. Largest...(Mn ,Ca)3(V ,Al)2Si3O12 {Mn2+ 3 }[V2 ](Si3)O12 Knorringite Mg3Cr2(SiO4)3 {Mg3}[Cr23+](Si3)O12 Uvarovite...isometric symmetry for garnet from the Monastery Mine kimberlite pipe, South Africa, one of which we calculated |  | | Journal (article/letter/editorial) | | contain magnesian olivine. The solubility of knorringite-MgaCr2(SiaO12)--in kimherlitic garnets is possibly...possibility of coexistence of grossular and knorringite, i.e. Mg-Cr-end member of the garnet group (Nixon...shaded line. The plot of garnet composition from the Kao pipe (Nixon and Hornung, 1968) is indicated by K...Gr grossular, Uv uvarovite, And andradite, Kn knorringite. Sources of analyses plotted in :Fig. 2: Fiala...A garnet from the kimberlitic concentrate of the Kao pipe containing 8.14% CaO and 17.45% Cr~Oa (Nixon |  | | Journal (article/letter/editorial) | | recorded in the type Kl kimberlites of the Kao pipe in Lesotho ( Clement, 1973). The cementing mass surrounding...Grossular Spessartine Andradite Uvarovite Skiagite Knorringite 1.21 0.49 0.09 0.73 0.51 004 0.01 3.11 0.02...KIMBERLITES FROM THE KAO P I P E , LESOTHO. In Nixon, P. H. ( E d . ) , LESOTHO KIMBERLITES: p. 110-121 |  | | Journal (article/letter/editorial) | | pressure is required. Therefore, a method to deter mine equilibrium pressure of garnet-clinopyroxene assemblages...uvarovite (Uvar) Mg3Cr2Si3O12 + Ca3Al2Si3O12, knorringite (Knor) Gross (VI) Ca3Cr2Si3O12 + Fe3Al2Si3O12...(asterisks), and Lesotho (crosses) eclogites, with I, II, and III = OrapaPremier, Koidu, and Lesotho geotherms...P-T plot for garnet-peridotite xenoliths from Lesotho kimberlite pipes; analyses for the calculations...Xenoliths in the kimberlite diatremes of northern Lesotho are of particular interest for interpretation of |  | 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) | | craton (Kilnberley, Jagersfontein and northern Lesotho), the Premier pipe in the central part of the Kaapvaal...that are undersaturated in Ca and high in Cr (knorringite component ; Sobolev et al. 1984; Boyd and Gurney...of over 200 peridotite xenoliths from the Premier mine, South Africa, yielded 5 graphite-bearing specimens...xenolith is comparable to a lherzolite from Premier Mine containing approximately 60% graphite (Mathias et...Lithology 613C%~ PDB Thaba Putsoa Mothae Thaba Putsoa Kao No. 2 Letseng-la-Terai Jagersfontein Garnet harzburgite |  | | Book | | mica-bearing peridotite that in some parts of the mine contained so many xenoliths of carbonaceous shale...Iramba plateau west of Singida; only the Mwadui Mine at Shinyanga and one near Kahama have been sufficiently...Republic of South Africa, South-West Africa and Lesotho. The inland plateau of South Africa is the region...are more recent accounts of the kimberlites of Lesotho (Nixon 1973b); the kimberlites of S.W. Africa (Janse...the one striking WNW-ESE - has been termed the Lesotho trend (Crockett and Mason 1968); it is a dominant |  | | Book | | garnet Iherzolite nodules in kimberlites(from Lesotho and South Africa) and were analysed for isotopic... 1971) the uppermost Drakensberg basalts in Lesotho yielded mica ages of 380, The pipe contains abundant...was intended. Unfortunately devel¬ opment in the mine has not yet permitted collection of fresh samples...samples from the Premier mine, representing types 1, 2 and 3 as mapped by mine geologists. A good spread...Potassium-argon radioages of Karroo volc¬ anic rocks from Lesotho. Bulletin Volcanologique, XXXV, pp 64-84. J.D. |  | | Book | | hamlet of Colesbergthe Kimberley Mine (De Beer's New Rush), the De Beers Mine (De Beer's Old Rush), and the...spell and pronounce the name of the main electoral district by calling it after his Lordship. The names "New...kimberlite provinces were discovered in Tanzania, Lesotho, Colorado-Wyoming (U.S.A.), and Yakutia (U.S.S...ground with descriptions of kimberlite fields in Lesotho and Namibia which were unknown to Wagner and Williams... HISTORICAL ASPECTS OF KIMBERLITE PETROLOGY 7 Canada, Lesotho, and South Africa by modem mineralogical and geochemical |  | | Book | | ancient mine sites from Greek and Roman authors who were not in the gem trade. Fictional mine sources...could also hamper modern efforts in locating ancient mine sources. However, Theophrastus is quite explicit...One thing seems certain, however: the Carthaginian mine source must have been rather extensive, lasting...gem market. Pliny also mentioned that in this district a very 'poor' variety of rock crystal was produced...---------------------------------------Uvarovite Khoharite Knorringite Yamatoite Calderite Blythite Goldmanite Kimzeyite |  | | Book | | on Crystallization of Garnet in the Majorite-Knorringite System . . . . . . . . 3.4.2 Crystallization...Forsterite Ferropericlase Garnet Harzburgite Ilmenite Knorringite (Mg3Cr2Si3O12) Lherzolite Majorite (Mg4Si4O12)...Ohtani E, Kumazawa M (1982) Stability field of knorringite Mg3 Cr2 Si3 O12 at high pressure and its implication...Erde 64:1–7 Turkin AI, Sobolev NV (2009) Pyrope–knorringite garnets: overview of experimental data and natural...Gottlob Lehmann (1719–1767) in the Beryozovskoye Mine (Ural Mountains, Russia) and initially used as a |  | | Journal (article/letter/editorial) | | Greenish-blue hexagonal crystals from the Bou-Skour copper mine, Jebel Sarho, Ourzazate, Morocco, have the composition...occurring as an intergrowth with djurleite at the Ani mine, Akita, Japan, in prismatic or platy crystals closely...on a few specimens from the Mammoth-St. Anthony mine, Tiger, Pinal County, Arizona. Named for its discoverer...lead-grey aggregates from the North Lily mine, East Tintic district, Utah; orthorhombic. Named for P. Billingsley...nodules in anhydrite rock in the Cane Creek potash mine, Moab, Grand County, Utah; 956 M.H. HEY formula |  | | Journal (article/letter/editorial) | | together with the Liqhobong, Letseng and Kao pipes in Lesotho. Specimens from the Zero kimberlite on the...(Viljoen et al. in press) and at the Roberts Victor mine (Viljoen et al. 1991). The abundance of low-Ca xenoliths...kimberlite and in coarse concentrate from the Premier mine (Danchin 1979), and an even greater number have...Green (1985) Localities P, Premier LQ, Liqhobong K, Kao BF, Bultfontein Floors J, Jagersfontein, LT, Letseng-la-Terai...field. The Cr-garnet end member Mg3Cr2Si3012 (knorringite) is stable only at pressures above about 80 kbar |  | | Book (volume) | | Diamond-Graphite Ecologite From the Roberts Victor Mine, C. J. Hatton and John J. Gurney ................. Lower-Crustal Granulites and Eclogites From Lesotho, Southern Africa, W. L. Griffin, D. A. Carswell...and Garnet Harzburgite XenolithsFrom the Premier Mine, South Africa, R. V. Danchin ....................Geochemistryof Ultramarie NodulesFrom Pipe 200, Northern Lesotho, D. A. Carswell, D. B. Clarke, and R. H. Mitchell...... 145 Mafic and Ultramafic Xenoliths From the Kao Kimberlite Pipe, Ian D. MacGregor .............. |  | | Journal (article/letter/editorial) | | levels of chromium in the garnets which contain a knorringite component (fig. 2). Monoclinic pyrox enes in...021 0.12 MgO 25.91 1.06 41.77 CaO 4.49 2.93 1.47 KaO 4.51 1.01 0.06 Na2O 0.44 0.35 0.09 0.14 0.14 0.05...inclusions from the Taba Putsoa pipe of northern Lesotho. But this principle is maintained only to certain |  | Tychkov, N.S., Yudin, D.S., Nikolenko, E.I., Malygina, E.V., Sobolev, N.V. (2018) Mesozoic lithospheric mantle of the northeastern Siberian craton (evidence from inclusions in kimberlite) Russian Geology and Geophysics, 59 (10) 1254-1270 doi:10.1016/j.rgg.2018.09.005 | Journal (article/letter/editorial) | | phlogopite; Siberian craton percentages of knorringite, indicates highly probable existence of unknown...that subcalcic Cr pyropes containing >10 mole% knorringite are present only in samples that bear high-Cr2O3...diamond-poor kimberlites and depend mainly on sampling. The Kao kimberlite (Lesoto) is an illustrative case in this...this phase was identified as a new mineral of knorringite by the International Mineralogical Association..., Turkin, A.I., Kogarko, L.N., 1997. Pyrope-knorringite garnets in the Earth’s mantle: experimens in |  | | Book | | Na^0=0.03; for samples 0-802, BLT-1, E-10, and Knorringite, 1, 7, 4 , 0 , 9, and 7 re spectively. Analyser...Spessartine Andradite Ti-Andradite Uvarovite Knorringite / Mg-component Ca-component Cr-component n measured...pyrope; (6) almandine; (7) spessartine; and (8) knorringite (if Cr > Ca) with the deduction of an equivalent...only a few pipes including the 'Roberts Victor' Mine contain more than 90% of eclogites, including kyanite...andradite = 9.2, 4.5; Ti-andradite = 6.4, 0.2; knorringite = 5.4, 9.4; uvarovite for T7/272 = 12.6; koharite |  | | Journal (article/letter/editorial) | | Koidu, unlike those described from the Kao kimberlite pipe in Lesotho (MacGregor 1979) and elsewhere. Examined...are also present in the Thaba Putsoa Kimberlite, Lesotho, (Griffin et al. 1979). The compositional field...(1975) Homogeneity of minerals in mantle rocks from Lesotho. Carnegie Inst Washington Yearb 74:519 525 Bundy...(1979) Lower crustal granulites and eclogites from Lesotho, Southern Africa. In: Boyd FR, Meyer HOA (eds)...A diamond-graphite eclogite from Roberts Victor Mine. In: Boyd FR, Meyer HOA (eds) The mantle sample: |
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