 | | Journal (article/letter/editorial) | | Studsvik Kimberlitic zircons from 16 intrusions in Lesotho, the Republic of South Africa, and Tanzania have...gram per ton or less (Dyke 170, cf. KRESTEN 1972; Kao (0.01 g/t), T. K. WHITELOCK, pets. comm.; Letseng...Dutoitspan in his collection. At Letseng la terae (Lesotho), two small euhedral zircons have been discovered...distinct colours. This is true for diamonds as well. Lesotho kimberlitie zircons are usually colourless, except...nodules of garnet, and bronzite that are found in the kimberlites of northern Lesotho also show some fractures |  | | Journal (article/letter/editorial) | | and associated rocks, with special reference to Lesotho occurrences PETER KRESTE N LITHOS @ Kresten...and associated rocks, with special reference to Lesotho occurrences. Lithos 7. 171-180. Uranium contents...(Akimov & Semenov 1970) is fairly well known. For Lesotho kimberlites, only a few analyses are available...kimberlites from southern Africa. No. Type Locality· Lesotho KN3a KN131 PHN1356 LLT6 LLTl5 PH N 1304 PHNI948...Letseng-Ia-terae (40) Mothae (37) Mothae (37) Mothae (37) Kao (I), quarry area Pipe ZOO Lemphan e (3), centre Lemphan |  | | Journal (article/letter/editorial) | | electron probe confirms that a garnet from Kao kimberlite pipe in Lesotho contains a large proportion of the...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...pyrope from E10 serpentinisednodule from Sekameng,Lesotho gave 7.52 percent Cr2Os(table 1) (Nixon et aI....i963). A bluish-greengarnet, K47 from Kao kimberlite pipe, Lesotho, whose physical properties indicate |  | | 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 |  | Garanin, V. K., Kudryavtseva, G. P., Matsyuk, S. S., Cherenkova, A. F., Cherenkov, V. G. (1990) DISCOVERY OF ZIRCON-BEARING ILMENITE-AMPHIBOLE PYROXENITE IN KIMBERLITE. International Geology Review, 32 (11) 1086-1094 doi:10.1080/00206819009465841 | Journal (article/letter/editorial) | | identified by Williams [15] in the Kao kimberlite pipe in Lesotho. Later, the paragenesis of zircon with...Cr2C>3 (0.57 wt%) for ilmenite included in zircon (Kao pipe). Zircon, a characteristic kimberlite mineral...orthopyroxene is bronzite with a high FeO content (12.04-12.45 wt%, Table 1). Published analyses of bronzite from...Ng- and A/p-polarized absorption spectra of the bronzite (Fig. 4), the typical narrow bands of Fe 3+ (22 |  | | 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 |  | | Report (volume) | | ............................ Maryland and the District of Columbia................................................................. 2. Crystal Falls district, Michigan.................................. ....................... Schist from the Aragon iron mine............................... ill 17 .18 18 19................................... 51 7. Mesabi district, Minnesota....................................................................... 74 2. Butte district.............................................. |  | | Journal (article/letter/editorial) | | Boyd (1973) constructed a 'paleogeotherm', the Lesotho geotherm, from the P—T estimates obtained for suites...obtained by these methods are compared with the Lesotho geotherm of Boyd (1973) (curve a) and the new geotherm...two-pyroxene thermometry (Wells, 1977). Curve a^—Lesotho geotherm of Boyd (1973); Curve b—geotherm of Carswell...estimates which lie between the lower limbs of the Lesotho geotherms derived by Boyd (1973) and by Carswell... Homogeneity of minerals in mantle rocks from Lesotho. Yb. Carnegie Instn. Wash. 74,519-25. Fugii, T |  | | 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) | | Ho-chieh, Shantung Plate 1-2 - Rounded meteorite, Yu-Kao, Kiangsu The fusion crust of Chondrite C is brownish...Semicircular radiating and fibrous aggregates of Kiangsu Yu-Kao meteorite 0 - olivine; Y - clinopyroxene (crossed...- 8. Ellipsoidal thread aggregates of Kiangsu Yu-Kao meteorite nickel-iron; 0 - olivine; Y - clinopyroxene...Subparallel thread rounded aggregates of Kiangsu Yu-Kao meteorite Y - clinopyroxene; 0 - olivine (crossed...groundmass. 54 1.686 1.685 Name bronzite ,, An 2V, (%) 52° 12 bronzite 56 '---60 ° 15 - 18 P, 74? |  | | Journal (article/letter/editorial) | | larger intrusions, for example, the I mile diameter Kao pipe. PBrnocnapnv Kimberliles. The three well known...1960, p. 179). E4. Eclogite nodule, kimberlite, Kao, calculated from mineral analysesl pyropealmandine...(I{ezner, 1903). 6. Griquaite, Roberts Victor Diamond Mine, S. Africa, recaiculated to exclude calcite and...Other notable minerals Diamond, chrome diopside Kao No. 1 Diamond, chromite Dark green diopside Ihaba...Adopted from Stockley (1947) mined for hardebank from Kao pipe representsan average.Kimberlite washings typically |  | | Report (volume) | | ......................... 82 Maryland and the District of Columbia.............................. 83 1......................... 4. The Castle Mountain district...........................'...-.. 5. The Highwood.............................. 2. The Pikes Peak district ...... ....:..........-.....--.-----.-3. Silver................................ 6. The Ten Mile district......................................... 7. The........................... 270 2. The Leadville district...... .................................. 271 3 |  | | Journal (article/letter/editorial) | | Chemical analyses of Mitaki tholeiites Augite bronzite tholeiite, a quarry of Yamayashiki, Sendai. Analyst...Analyst, K. Aoki (Kawano and Aoki, 1959). 2. Bronzite tholeiite, Mitaki hot spring, Sendai. Analyst, K...2, Analyst, K. Aoki. 3. Olivine bearing augite bronzite tholeiitic andesite. Hachiman-machi, Sendai. Analyst...bearing bronzite tholeiitic andesite, a quarry of Monju, Sendai. Analyst, K. Aoki. 5. Augite bronzite tholeiitic...andesite. a quarry of Goroku, Miyagi-machi. 6. Bronzite augite tholeiite, Okura dam site, Miyagi-machi |  | | Journal (article/letter/editorial) | | Satellite Letseng-la-terai (Letseng) kimberlites in Lesotho, contributes to a large average stone size of ~1ct/stone...Debbie Bowen. The largest stone is the 603 ct “Lesotho Promise”, recovered in August, 2006. Note the irregular...Africa (King et al., 1998). However, the Karowe mine, in the Orapa kimberlite cluster, Botswana, which...of Type IIa diamonds in the Letseng kimberlite (Lesotho), based on a total sample of ~200 000 ct from this...Type IIa suite. In contrast, 0.6 to 4.4% of run-of-mine production from localities in South Africa and Botswana |  | | Journal (article/letter/editorial) | | diopsidic augite). Lherzolite contains poikilitic bronzite and phlogopite (enclosing olivine and diopsidic...sample 739t4182 SiOz TiO2 AlaO3 FeO MnO MgO CaO Na20 KaO Cr203 BaO Total 1 2 3 4 5 6 7 38.88 22.47... rounded anhedral grain 2. Bronzite, large poikilitic crystal 3. Bronzite, anhedral grain 4. Diopsidic...of the bronzite (En79, Table 1) from shonkinite 73914182. Poikilitic texture of the bronzite indicates...which cocrystallized olivine, diopsidic augite, bronzite, and phlogopite. Liquid trapped in the cumulate |  | | Journal (article/letter/editorial) | | 2.03 2.41 36.88 40.00 1.50 Na,O. 0.95 0.94 KaO. 0.14 0.12 H,O. 0.68 1-90 0.07 0-59 0.34 FeO...chromite, 0.87 ; apatite (merrillite ?), 0.63 ; bronzite (in which MgO :FeO=about 5), 33-83; olivine (MgO...stone may be classed as a grey hypersthene- (to bronzite-) chondrite. L. J. S. |  | | Journal (article/letter/editorial) | | 11 1-18 3.61 17.68 0.48 Na,O. I. 11. 0.72 KaO. I 1-03 - H20. 1.44 Total. - 100.31 10.90...about 3 miles east of the Emerald and Hiddenite Mine, in Alexander Co. The colour of the crystals is...troilite. Olivine is the most prominent constituent. Bronzite appears i n irregular crystal fragments scattered...100~00 100.00 The insoluble part is evidently bronzite, with some felspar. The stone belongs t o the |  | | Journal (article/letter/editorial) | | embayed, the reaction zone containing remnant bronzite, secondary clinopyroxene and possibly glass. Diopside...Garnet and clinopyroxene in eclogite (E4) fron the Kao kimberlite pipe, Basutoland (Nixon, el al' , 1963)...of Kakanui, with remarks on the geology of the district. Trans. N. Z. Inst.38,482-495. --(1907) Inclusions...t1'pical mode (OU19854) 67.7/s iorcterite, 77 57o bronzite, 14.3/s chrome diopside, 0.5/6 picotite. Color...oiivine (Turner, 1942) and distortion of bronzite cleavages. Bronzite has monoclinic lamellae exsolved parallel |  | | Report (volume) | | acid, is serpentine. The insoluble portion may be bronzite. Analyses of the silicates are as follows: Total...ARSENIDES. BISMUTHINITB. From the Rosario Mining District, Sinaloa, Mexico. W. I-I. Melville. Described...Bulletin 61. COVELLITE. From the East Greyrock mine, Butte, Mont. Collected by G. W. Tower. Analysis...A massive ore from the mine of the Canadian Copper Company, Sudbury, district of Algoma, Ontario. Specific...Another nickel-iron sulphide, from the Worthington mine, SauTt branch of the Canadian Pacific Railway, 25 |  | | Journal (article/letter/editorial) | | nodules from some kimberlites of northern Lesotho and the Monastery mine, South Africa. Phys Chem Earth 9:431-454...reference to those from the kimberlites of northern Lesotho. Contrib Mineral Petrol 74:403416 Cressey G, Schmid...and biotites from granulites in the Quairading district, Western Australia. Neues Jahrb Mineral Monatsh...Australia. J Petrol 15:1-40 Karsakov LP (1973) Pyrope-bronzite-sillimanite schist of eastern Stanovik and the...eclogite pods from the Basal gneisses in the Selje district, western Norway. J Petrol 19:530-584 Lovering |  | | Journal (article/letter/editorial) | | 6). Plagioclase dominates and is accompanied by bronzite, augite, and titan 9 tite in all samples. Six...occurs in many samples with < 58.5% SiO2, while bronzite contents decrease abruptly below 56% SiO2. Most...hornblende. The most silicic, $20, also contains bronzite and plagioclase. The others contain occasional...occasional rounded plagioclase crystals and rare bronzite usually rimmed by augite. $31 and $33, from the most...phlogopite. The general absence of plagioclase and bronzite in the alkaline 270 scoriae, and the presence |  | | 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. |  | | Journal (article/letter/editorial) | | which is characterized by an abundance of large bronzite crystals. Toward the dyke, the central zone becomes...by using the cumulus phases as a prefix, e.g., bronzite + plagioclase cumulate. In this paper, the term...Each layer consists of bronzite + plagioclase cumulate at the base (bronzite, 55 per cent, and plagioclase...which grades upward, with the disappearance of bronzite, into plagioclase cumulate (85 per cent plagioclase)...the plagioclase cumulate of one layer and the bronzite + plagioclase cumulate of the next is abrupt. |  | | Book (edition) | | genthite, dudleyite,arfvedsonite, penninite, bronzite, enstatite, picrolite spinel, deweylite, prochlorite...found at the Reid Mine, in Cabarrus county, the Crump Mine and the Swift Island Mine, in Montgomery country...) at the Cansler & Shuford Mine, in Gaston count} and the Little John Mine, in Caldwell county, and Pax...crystals at Ward’s Mine, in Davidson county; also, in Union county, at the Pewter Mine, and associated with...specimens have been found at Silver Hill, when the mine was first opened, consisting of lumps of several |  | | Journal (article/letter/editorial) | | 1943) of multiple intrusions in the Aliwal North district. A detailed petrological account of a sill in...Intensive examination of the dolerites of the Calvinia district in the Western Karroo, and a reconnaissance across...intensive examination of intrusions in the Kokstad district. 1946. Collecting traverses across the Karroo...Transkei (PI. 1, fig. 2), and at Perdekloof, Calvinia district (PI. 2, fig. 1). Prolonged erosion gives rise...g., at Downes Mountain and Hangnest, Calvinia district) are thought by the present authors (1940, p. |
|
