 | | Journal (article/letter/editorial) | | Pyroxene-Ilmenite Intergrowth from the Monastery Mine, South Africa J. B. DAWSOn" Department of Geology...in a xenolith from the kimberliteMonastery Mine, South Africa, may be derived by exsolution from a single...now classic treatises on the kimberlites of South Africa, both Wagner (1914) and Williams (1932) make...of the Monastery Mine, a small intrusion on the Farm Monastery, 10 miles north-west of Clocolan, in the...the eastern Orange Free State. Wagner (op. cir., p. 152) described nodules consisting of "regular intercrystallisations" |  | Defnet, Peter A., Wise, Michael A., Harmon, Russell S., Hark, Richard R., Hilferding, Keith (2021) Analysis of Garnet by Laser-Induced Breakdown Spectroscopy—Two Practical Applications. Minerals, 11 (7) 705 doi:10.3390/min11070705 | Journal (article/letter/editorial) | | Earth and Atmospheric Sciences, North Carolina State University, Raleigh, NC 27695, USA Institute for...multi-element analysis of material in any physical state—gas, liquid, or solid [1]—and has particular attributes...the high-temperature plasma into a collection of free electrons plus weakly ionized molecular, atomic..., Hawk Mine, NC, USA; Rutherford Mine, VA, USA; Little 3 Mine, Ramona, CA, USA; Golcando Mine, Minas...Minas Gerais State, Brazil) and rhyolite (e.g., Nathop, CO, USA; Topaz Mountain, UT, USA), whereas andradite |  | | Journal (article/letter/editorial) | | amphiboles occurring in Cr-diopside series and Al-augite series xenoliths; as megacrysts in a variety of...in modal amounts of olivine, black titaniferous augite, and spinel, all of which contain relatively large...Various names are used such as the Cr-diopside and Al-augite groups (Wilshire and Shervais, 1975) or groups...rocks occur in a variety of tectonic settings. The South African kimberlites and the examples from the Colorado...Alaska are at plate-collision margins; whereas the South Yemen and East African examples are in a crustal-tension |  | | Journal (article/letter/editorial) | | 889 EXCURSION TO THE SOUTH ITALIAN VOLCANOES. By H. J. JOHNSTON-LAVIS, M.D., F.G.IS. (Read January...the night. A portion of the party walked to the south end of the island to watch the explosions from Vulcano...p. 126) you will notice the striking re sem- SOUTH ITALIAN VOI.CANOER. 391 the east coast of that...lla Castagna. The far gr eat er heigh t of t he south wall of t he crater , with its peculiar hump, now...and white pumice are well seen. Farther to the south, the g eologists were shown another obsidian stream |  | | Book (volume) | | Diamond-Graphite Ecologite From the Roberts Victor Mine, C. J. Hatton and John J. Gurney .................Granulites and Eclogites From Lesotho, Southern Africa, W. L. Griffin, D. A. Carswell, and P. H. Nixon...Garnet Harzburgite XenolithsFrom the Premier Mine, South Africa, R. V. Danchin ...........................the Bultfontein and De Beers Mines, Kimberley, South Africa, P. J. Lawless, J. J. Gurney, and J. B. Dawson...257 The Ilmenite Associationat the Frank Smith Mine, R.S.A., Jill Dill Pasteris, F. R. Boyd, and P. |  | | Journal (article/letter/editorial) | | standard samples each for clinopyroxene and garnet; augite and pyrope megacrysts from Kakanui, New Zealand...diopside and pyrope megacrysts from the Monastery Mine, South Africa, and omphacite and garnet from an eclogite...eclogite from the Roberts Victor Mine, South Africa. The samples from Monastery and Roberts Victor were analyzed...sample f r o m the F r a n k Smith pipe, S o u t h Africa ( F R B 81) a n a l y z e d by Boyd (1974) gives...conditions. A sheared nodule from the Premier pipe, South Africa (RVD 106) analyzed by Danchin and Boyd (1976) |  | | Book | | calcite, clay minerals and fragments of crustal and local host country-rock. At Lattavaram the kimberlite...Akimoto and Masaki Akaogi (Institute for Solid State Physics, University of Tokyo, Roppongi 7-22-1, Minato-ku...Iherzolite nodules in kimberlites(from Lesotho and South Africa) and were analysed for isotopic compositions...University of the Witwatersrand, Johannesburg, 2001, South Africa) Radiometric age determinations were undertaken...undertaken on 15 kimberlite occurrences in Southern Africa, emphasis being placed on a wide areal distribution |  | | Journal (article/letter/editorial) | | from a small gabbroic pluton from Chester County, South Carolina has revealedintergrowths representingall...(1979) reported a xenolith from the Weltvreden Mine, South Africa, which consists of acicular orthopyroxene...and, more rarely, clinopyroxenefrom a variety of South African peridotite xenoliths; these intergrowths..."myrmekitic" contains which pyroxenes Carolina South planes host (001) of the (010) andlor the intergrowth...graphic ilmenite and host clinopyroxene are generally free of alteration, although in some casestraces of phlogopite |  | | Journal (article/letter/editorial) | | Estimated proportions of fractionating phases are 30% augite, 24.5% subcalcic diopside, 27% garnet, 12.9% phlogopite...total iron) from the subcalcic diopsides to the augite megacrysts, with the clinopyroxene-ilmenite intergrowths...(KuSHIRO, 1979). Six subcalcic diopside and six augite megacrysts were analyzed for the REE (Table 2;...10 times chondrite in the middle REE (MREE). The augite megacrysts have generally lower La/Yb ratios (3...ilmenite, phlogopite, and minor zircon (NIXON, 1980). Augite megacrysts arc also found, akin to megacryst suites |  | | Journal (article/letter/editorial) | | Sciences, University of Cape Town, Rondebosch, South Africa Department of Geology and Geophysics, Yale University...from upper-mantle derived garnet, enstatite and augite employing a two-step extraction procedure with...Clinopyroxene SubCa-augite megacryst kimberlite diatreme facies Locality Premier, South Africa 54.8 0.35 2...P2O5 NiO H2O (ppm) a b KBH-2 Clinopyroxene Ti-Al augite megacryst basanite unconsolidated tuff Kilbourne...megacryst kimberlite hypabyssal facies Monastery, South Africa 41.7 1.25 21.0 0.62 10.9 0.28 19.5 4.62 |  | | Journal (article/letter/editorial) | | within basalts at Kakanui and elsewhere (see Al-Ti-augite megacrysts accompany the garnet megacrysts at IRVING...THIS STUDY Pyrope from kimberlite, Monastery Mine, Orange Free State. The sample 1. was a large, homogeneous...spine1 lherzolite xenoliths and megacrysts of Al-Ti-augite and rare kaersutite (FRISCH and WRIGHT, 1971; J...garnet contains several small inclusions of Al-Ti-augite (SiOp 49.7%, TiOP O-70%, A1203 9.5%, Cr203 0.018...06) which is similar in composition to the large augite megacrysts found at this locality (FRISCH and WRIGHT |  | | Journal (article/letter/editorial) | | the Lesotho kimberlites (Nixon and Boyd 1973a), Monastery (Gurney et al. 1979; Moore et al., 1992; Griffin...Jagersfontein (Hops et al. 1989, 1992) in southern Africa. (The locations of these and other southern African...the Nouzees kimberlite in North-West Province, South Africa (Jones 1987). Paired high- and low-Cr ilmenite...sometimes referred to as Crown); 8 Kaalvallei; 9 Monastery; 10 Northern Lesotho cluster (Thaba Putsoa and...relatively Cr-rich ilmenite populations from the Monastery kimberlite, characterized by different and non-overlapping |  | Motsamai, Theetso, Harris, Jeffrey W., Stachel, Thomas, Pearson, D. Graham, Armstrong, John (2018) Mineral inclusions in diamonds from Karowe Mine, Botswana: super-deep sources for super-sized diamonds?. Mineralogy and Petrology, 112. 169-180 doi:10.1007/s00710-018-0604-9 | Journal (article/letter/editorial) | | PAPER Mineral inclusions in diamonds from Karowe Mine, Botswana: super-deep sources for super-sized diamonds...of mineral inclusions in diamonds from the Karowe Mine in north-east Botswana, along the western edge of...CaO contents <1.8 wt%, consistent with pyroxene-free (dunitic) sources. The highly depleted character...origin for the exceptionally large diamonds from this mine. Keywords Zimbabwe Craton . Orapa kimberlite cluster...(including the 1109 carats Lesedi la Rona) at the Karowe mine in north-eastern Botswana raises the question: what |  | | Journal (article/letter/editorial) | | in xenocrysts from Kilbourne Hole (46 ppm) and South African kimberlites (up to 29 ppm) compared to the...by incorporation in nominally anhydrous/fluorine-free minerals. Keywords: FTIR, SIMS, mantle, calibration...measured by Bell et al. (1995) on a mantle-derived augite using manometry; consequently, many studies (e...laboratories (Carnegie Institute of Washington and Arizona State University) and/or have been studied by Aubaud et...122(12) Shannon et al. (1992) ROM271-DI10 Monastery Mine, S. Africa 3.339 542(81) 382(27) 412(45) 1336(97) |  | | Journal (article/letter/editorial) | | both of Ægina and Methana, show many signs of a too free use of the imagination and of the imperfect methods...group of "Trackyte bleu porphyroide" (p. 252), and state that the "Domite" (the light gray compact hornblende-andesite...limestone of undoubted Cretaceous age. The next district is that comprising Mts. Stavro, Palæochora, and... and may be called for convenience the Stavro District. It is entirely composed of eruptive material...being a light gray hornblendeandesite. The fourth district is the most complex, both topoIt embraces the |  | | Journal (article/letter/editorial) | | 60 obtained for a diopside (PHN 2661. Monastery Mine, South Africa). The major element compositon determined...is impossible to check if “Na and “Al signals are free from overlappings. because they are mono-isotopic...cm) from Picher. Oklahoma of the Tristate PbZn district of Mississippi Valley type ores. The Mississippi...and extensively discussed is the one based on the local thermal equilibrium model (ANDERSEN and HINTHORNE...SCHWERERer al. (1974); Hd2: hedenbergite from Sasagatani Mine, Japan; 4309: ferroaugite from Skaergaard intrusion |  | Korolev, Nester, Kopylova, Maya, Gurney, John J., Moore, Andy E., Davidson, Jim (2018) The origin of Type II diamonds as inferred from Cullinan mineral inclusions. Mineralogy and Petrology, 112. 275-289 doi:10.1007/s00710-018-0601-z | Journal (article/letter/editorial) | | sublithospheric mafic paragenesis is mainly represented by Cr-free majorite, various CaSiO3 phases and omphacite equilibrated...University of Cape Town, Rondebosch, Cape Town 7701, South Africa 4 Department of Geology, Rhodes University...University, Artillery Rd, Grahamstown 6140, South Africa 5 School of Earth and Ocean Sciences, University of...Ealing Crescent, Bryanston, Johannesburg 2021, South Africa Introduction Diamonds are broadly divided into...diamonds from Letšeng-la-Terae kimberlites (Southern Africa) that can be visually identified based on their |  | | Journal (issue) | | sales of pink and blue diamonds from the Argyle mine • Chalcedony-epoxy composite imitation of “candy...Paris, France New York, New York Johannesburg, South Africa Al Gilbertson Laura Otter Wuyi Wang Carlsbad...Schmetzer traces the history of the Habachtal emerald mine through several centuries up to World War I, using...inclusions. referred to as the Pyu city-states. This state structure was replaced by a line of larger kingdoms...left: 7.63, 9.77, and 7.44 ct) from the Baw Mar mine at Kyatpyin in the Mogok region of Myanmar. Photo |  | | Journal (article/letter/editorial) | | High Pressure Research, Department of Geosciences, State University of New York, Stony Brook, NY 11794-2100...majoritic garnet inclusions in diamonds from southern Africa [1] shows definitely that some ultradeep (>300...inclusions have been found in single diamond hosts from Africa, America and Australia [3– 6]. These have been... and is a perfect octahedron. Both diamonds are free from cracks under the optical microscope. Mineral...Tokyo Institute of Technology. A well-calibrated augite megacryst from alkali basalt was employed as a |  | | Journal (article/letter/editorial) | | mantlederived pyrope garnet (56 + 6 ppm HrO by werght), augite (268 + 8, ppm HrO), and enstatite (217 + I I ppm...32, and 15.6 + 0.94 /(ppm HrO.cm'?)for pyrope, augite,and enstatite,respectively, allow precisespect...PMR-53:augitemegacryst,3 x 2 x 2cm,from kimberlite, Premier Mine, South Africa. KBH-1.opx : aluminous enstatite mineral...pyrope garnet megacryst from kimberlite, Monastery Mine, South Africa. Similar samples described by Nixon...existenceof large volumes (-0.05-0.1 cm3in the garnetand augite)of apparently flawlessmineral in the starting materials |  | | Journal (article/letter/editorial) | | ASSOCIATED SEDIMENTARY ROCKS of the T0VR)/AKE~.DY DISTRICT (CovNT:i" MAYO). By C~AI~LES II~vL'~O GARDINER...north to the neighbourhood of Tourmakeady in the south, a distance of about 4~ miles. At the southern end... Lough Mask. A number of streams traverse the district from west to east, and afford an excellent series...this being partly due to the fact that the district is free from drift. Considering the interesting and...West Galway & South-West Mayo,' while in the main dealing with districts farther south, incidentally |  | | Journal (article/letter/editorial) | | less difficulty from this source in the present district than in many others. In the final classification...differs from his in distinguishing between the augite and the hypersthene-andesites. HornblendeI divide...Hornblende-Andesite; Biotite- Hornblende-Andesite; Hornblende-Augite-Andesite; HyperstheneAndesite, and Hornblende-...to this group compose the whole of the Stavro district, i. e., Mts. Stavro, Paiæochora, and Spasmeno...Mt. Chondos, or Mt. Dendros, and at a small hill south of Kakoperato. While these various occurrences greatly |  | | Report (issue) | | SURVEY OF SOUTH AFRICA COUNCIL FOR GEOSCIENCE GEOLOGICAL SURVEY OF SOUTH AFRICA MINERALOGY OF SOUTH AFRICA:... COUNCIL FOR GEOSCIENCE GEOLOGICAL SURVEY OF SOUTH AFRICA Scientific Editor R.D. Dixon Linguistic and...Council for Geoscience (Geological Survey of South Africa), 280 Pretoria Street, Silverton, Pretoria or........................... 69 5.1 Overview of South African Occurrences ..............................LAYEREDSUITE,BUSHVELDCOMPLEX.... 111 MINERALOGY OF SOUTH AFRICA: TYPE-MINERAL SPECIES AND TYPE-MINERAL NAMES |  | | Journal (article/letter/editorial) | | o l % jadeite, from 15 kimberlite bodies in South Africa, Botswana, Tanzania, and Lesotho, have been...reflect compositions less accurately than in strain-free crystals (e.g. Tullis and Yund 1979). However, because...subcalcic diopside megacrysts Olifontsfontein, South Africa 79-004-005 Mabuki, Tanzania 79-008-001 Orapa...P21/c pigeonite. The augite lamellae are dark because no electrons from augite are diffracted into the...electron intensity contributing to the image of the augite lamellae. Experimental Technique In order to obtain |  | | Journal (article/letter/editorial) | | Wesselton and Dutoitspan kimberlite diatremes, S. Africa (WAGNER, 1914; WILLIAMS, 1932), in several other...rocks from the De Beers Mine (WILLIAMS, 1932), mica-apatite rock, Newlands Mine (WAGNER, 1914), phlogopiteeolivine...diopside-phlogopite rock from the Roberts Victor Mine, the minerals of which have MARID-type composition...irregular shape of the ilmenite resulting from solid-state recrystallization. Furthermore, the rock is penetrated...Reconnaissance anallyses were made with a solid-state detector programmed for the Reed-Ware procedure |
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