 | | Journal (article/letter/editorial) | | 296--301 (1970) A Pyroxene-Ilmenite Intergrowth from the Monastery Mine, South Africa J. B. DAWSOn" Department...clinopyroxene-ilmenite intergrowth in a xenolith from the kimberliteMonastery Mine, South Africa, may be derived...kimberlites of South Africa, both Wagner (1914) and Williams (1932) make reference to pyroxene-ilmenite nodules...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" |  | | Journal (article/letter/editorial) | | Amsterdam - Printed in The Netherlands LZA ILMENITE-ORTHOPYROXENE INTERGROWTHS FROM THE MOON AND THE...1975 Myrmekitic or eutectic-like intergrowths of ilmenite and orthopyroxene, which texturally resemble intergrowths...systematic distribution of Mg between orthopyroxene and ilmenite. The similar textures were formed by different... 1. Introduction lntergrowths of pyroxene and ilmenite occur fairly commonly as nodules in kimberlite...Usually, these are intergrowths of clinopyroxene and ilmenite. However, Boyd [4] and Frick [5] have recently |  | 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 |  | | Book (volume) | | inclusions tinues over the relationship ene and ilmenite that they in kimberlite between kimberlites...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 |  | | Journal (article/letter/editorial) | | and Department of Geological Sciences, Arizona State University, Tempe AZ 85287-1604, U.S.A. Department...Sciences, University of Cape Town, Rondebosch 7700, South Africa e-mail: David.R.Bell@asu.edu Rory O. Moore...Town, Rondebosch 7700, South Africa Email: © 2004 Geological Society of South Africa ABSTRACT Xenoliths...subcontinental lithospheric mantle of southern Africa, and may be used to probe its compositional structure...garnet megacrysts from 61 kimberlites in southern Africa define four broad arrays on the basis of Cr2O3 |  | | Book | | relevant protective laws and regulations and therefore free for general use. 2132/3130-543210 To my wife,...collaboration. Much of my fieldwork in southern Africa has been carried out with the cooperation and assistance...7.3 2.8 2.9 Africa . . . . . . . . . . . . . . . . . . . . . . . . . . . . West Africa . . . . . . .... . . . . Central Africa. . . . . . . . . . . . . . . . . . . . . . . East Africa. . . . . . . . . .... . . . . . . . . . . . . . . . Southern Africa . . . . . . . . . . . . . . . . . . . . . U.S.S.R. . |  | | Journal (article/letter/editorial) | | Magmatic System: Megacrysts from the Monastery Kimberlite, South Africa DAVID R. BELL1*, GEORGE R. ROSSMAN1...show inflections related to co-precipitation of ilmenite, suggesting minor element (Ti) influence on OH...Department of Chemistry and Biochemistry, Arizona State University, Tempe, AZ 85287-1604, USA. Telephone:...from http://petrology.oxfordjournals.org/ at Adams State University on March 23, 2015 PASADENA, CA 91125-2500...91125-2500, USA JOURNAL OF PETROLOGY VOLUME 45 THE MONASTERY MEGACRYST SUITE Overview and significance of megacrysts |  | | Journal (article/letter/editorial) | | three modesofoccurrence:(l) nodular pyroiene-ilmenite intergrowths from kimberlite, (2) "myrmekitic"...of three nodular cfi"opyroxene-ilmenite intergrowths and an ilmenite-spinel websterite from the Elliott...from a small gabbroic pluton from Chester County, South Carolina has revealedintergrowths representingall...Mg)Alro and 0.5 mol9o o (Fe,Mg)rTioo) and minor ilmenite (14.3 mol.voMgTio, and 3.g mol.voFe2o3).The lamellar...co-precipitation of orthopyroxene, magnetite, and ilmenite. Coexisting Fe-Ti oxides suggestequilibration |  | Kamenetsky, Vadim S., Belousova, Elena A., Giuliani, Andrea, Kamenetsky, Maya B., Goemann, Karsten, Griffin, William L. (2014) Chemical abrasion of zircon and ilmenite megacrysts in the Monastery kimberlite: Implications for the composition of kimberlite melts. Chemical Geology, 383. 76-85 doi:10.1016/j.chemgeo.2014.06.008 | Journal (article/letter/editorial) | | Chemical abrasion of zircon and ilmenite megacrysts in the Monastery kimberlite: Implications for the...Melting Mineralogy Melt inclusions a b s t r a c t Ilmenite and zircon megacrysts, among other minerals representing...kimberlite magmas. The intimate association of ilmenite and zircon with their transporting kimberlite...pressures. The ilmenite and zircon megacrysts from the Monastery kimberlite (South Africa) represent a...are present around zircon and ilmenite, respectively. At the zircon–ilmenite contact, chemical contributions |  | | Journal (article/letter/editorial) | | Geology, Rhodes University, Grahamstown, 6140, South Africa b c SC R a School of Earth and Ocean Sciences...abundant in the megacryst-rich mid-Cretaceous Monastery and early Proterozoic Colossus kimberlites, located...association which have been documented in the Monastery kimberlite. This points to a genetic link between...megacrysts; Cr-rich T megacrysts; Colossus, Monastery. IP 1. Introduction SC R Olivine is invariably...These typical chemical trends are illustrated for South African Group I and Group II kimberlites in Figs |  | | Journal (article/letter/editorial) | | INGCOMP., AMSTERDAM SIGNIFICANCE OF PYROXENE-ILMENITE INTERGROWTHS AMONG KIMBERLITE XENOLITHS A. E....The occurrence of pyroxene-ilmenite intergrowths among xenoliths from South African Kimberlites is described...kimberlites. Kimberlites containing the pyroxene-ilmenite intergrowths apparently represent the deepest...clinopyroxene-ilmenite intergrowths as inclusions in the kimberlites of the Monastery Mine(Winberg Area...Area, Orange Free State), the Frank Smith Mine (NW of Barkly West, Cape Province) and in fissure kimbeflites |  | | Journal (article/letter/editorial) | | orthopyroxene, clinopyroxene, garnet, olivine, ilmenite and a number of subordinate phases, coexist in...Orthopyroxene, clinopyroxene, garnet, olivine and ilmenite are common megacryst phases, while subordinate...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...North-West Province, South Africa (Jones 1987). Paired high- and low-Cr ilmenite populations characterize |  | Moore, R.O., Griffin, W.L., Gurney, J.J., Ryan, C.G., Cousens, D.R., Sie, S.H., Suter, G.F. (1992) Trace element geochemistry of ilmenite megacrysts from the Monastery kimberlite, South Africa. Lithos, 29 (1) 1-18 doi:10.1016/0024-4937(92)90031-s | Journal (article/letter/editorial) | | element geochemistry of ilmenite megacrysts from the Monastery kimberlite, South Africa R . O . M o o r e a...Geochemistry, University of Cape Town, Rondebosch 7700, South Africa bDivision of Exploration Geoscience, CSIRO,...geochemistry of ilmenite megacrysts from the Monastery kimberlite, South Africa. Lithos, 29: 1-18. Ilmenite megacrysts...megacrysts in the Monastery kimberlite occur both as discrete monomineralic crystals and intergrown with...content of ilmenite serves as a useful fractionation index. After the appearance of ilmenite, the crystallization |  | | Book | | calcite, clay minerals and fragments of crustal and local host country-rock. At Lattavaram the kimberlite...although they are for the most part serpentinized. Ilmenite and garnet, the latter with very thick kelyphitic...opaque phases. 94550 I including spinel and ilmenite. Minor phases such as sphene and perovskite have...Total 101.49 0.23 from - - 100.93 in Ilmenite Ilmenite Phlo(2) gopite (1) 0.24 53.37 0.30 4.03 23...Akimoto and Masaki Akaogi (Institute for Solid State Physics, University of Tokyo, Roppongi 7-22-1, Minato-ku |  | | Journal (article/letter/editorial) | | tandfonline.com/loi/tigr20 Origin and Significance of Ilmenite Megacrysts and Macrocrysts from Kimberlite a ...Casey M. Hetman (1995) Origin and Significance of Ilmenite Megacrysts and Macrocrysts from Kimberlite, International...All rights reserved. Origin and Significance of Ilmenite Megacrysts and Macrocrysts from Kimberlite D A...Toronto, Toronto, Ontario, M5S 3B1 Canada Abstract Ilmenite populations (megacrysts and macrocrysts) from...understanding of the origin and significance of ilmenite in kimberlites worldwide. Most belong to the Cr-poor |  | | Book | | ............................ 126 5.3.3.2. West Africa ........................................... 126... . . . . . . . . . . . . . . . 6.3. Magnesian Ilmenite . . . . . . . . . . . . . . . . . . . . . . ..... . . . . . . . . 6.3.1. Megacryst!Macrocryst Ilmenite (Paragenesis I) . . . . . . . . . . . . . . ....Intergrowth Ilmenite (Paragenesis 2) ........................ 6.3.4. Groundmass Ilmenite (Parageneses...6.3.5. Ilmenite-Spinel Intergrowths (Parageneses 5 and 6) ................... 6.3.6. Ilmenite-Ilmenite |  | | Journal (article/letter/editorial) | | Clinopyroxene-Ilmenite Intergrowth B.A. Wyatt Anglo American Research Laboratories, Johannesburg, South Africa...natural clinopyroxene-ilmenite intergrowth from the kimberlite pipe at Monastery was found to be 1300...the liquidus phase in all but one case, and the ilmenite-out curve coincided with the beginning of melting...surrounded by intergrowths of clinopyroxene and ilmenite. The experimental and natural intergrowths are...support the view that the natural clinopyroxene-ilmenite intergrowths found in kimberlites are a product |  | | Journal (article/letter/editorial) | | Kimberlite-hosted diamond deposits of southern Africa: A review Matthew Field a,⁎, Johann Stiefenhofer...Southdale, 2135, South Africa c De Beers Group Services, PO Box 47, Kimberley, South Africa d De Beers Canada...discovery of diamonds in river deposits in central South Africa in the mid nineteenth century, it was at Kimberley...economic and industrial development of southern Africa. Following the discoveries at Kimberley, even more...more valuable deposits were discovered in South Africa and Botswana in particular, but also in Lesotho |  | | Journal (article/letter/editorial) | | kimberlites, South Africa Deon de Bruin Council for Geoscience, Private Bag X112, Pretoria, 0001, South Africa...ddbruin@geoscience.org.za © 2005 Geological Society of South Africa ABSTRACT Mineral chemistry of megacrysts from...southern African Group I kimberlites such as the Monastery kimberlite, whereas the High-Cr populations are...Witberg kimberlites from the Prieska region, South Africa. The Uintjiesberg kimberlite is situated off-craton...descriptions The Uintjiesberg (30°49’ south, 22°32’ east) and Witberg (29°11’ south, 22°21’ east) kimberlites are |  | | Journal (article/letter/editorial) | | 6140, South Africa. e-mail: andy.moore@info.bw © 2009 March Geological Society of South Africa ABSTRACT...3106 Cullinan, recovered from the Premier Mine, South Africa (Williams, 1932), as well as gems like the...kindly provided by Debbie Bowen of Letseng Diamond Mine, illustrates a selection of Type IIa stones from...the Letseng Type IIa stones do not fluoresce. SOUTH AFRICAN JOURNAL OF GEOLOGY, 2009, VOLUME 112 PAGE...IIa diamonds from Letseng Mine, curtesey of Debbie Bowen of Letseng Diamond Mine. Large stone is the 603 |  | | Journal (article/letter/editorial) | | Ultramafic nodules from the Kimberley pipes, South Africa F. R. BOYD Geophysical Laboratory, Carnegie...collected in a number of other areas in southern Africa in two important respects: (1) There are no sheared...mosaic-porphyroclastic. In most nodule suites from southern Africa and elsewhere in the world, these low-temperature...equilibration temperatures and which include pyroxene-ilmenite lamellar intergrowths, have not been found in...large, single crystals of garnet, pyroxene and ilmenite together with some intergrowths. primarily from |  | | Journal (article/letter/editorial) | | Springer-Verlag 1987 A model for the origin of ilmenite in kimberlite and diamond: implications for the...be Cr-rich relative to associated ilmenite megacrysts. Rare ilmenite inclusions in diamonds show chemical...indirect link to the host kimberlite. Introduction Ilmenite is a conspicuous mineral in many Group I kimberlites...for understanding the origin of the different ilmenite associations in Group I kimberlites. Mineralogy...Mineralogy and chemistry It is possible to group the ilmenite varieties recognized by different authors (e.g |  | BATUMIKE, J, GRIFFIN, W, BELOUSOVA, E, PEARSON, N, OREILLY, S, SHEE, S (2008) LAM-ICPMS U–Pb dating of kimberlitic perovskite: Eocene–Oligocene kimberlites from the Kundelungu Plateau, D.R. Congo. Earth and Planetary Science Letters, 267 (3) 609-619 doi:10.1016/j.epsl.2007.12.013 | Journal (article/letter/editorial) | | analysis of perovskites from four previously dated South African Group I kimberlites. Intercepts of regression... The ages of Group I kimberlites in Kimberley District cluster around 87 Ma, similar to those determined...is also found overgrowing on minerals such as ilmenite, also a late-phase mineral in kimberlite. Perovskite...perovskites from some previously-dated Group I South African kimberlites. 2. Geological setting The Kundelungu...Mesoproterozoic Irumide belt to the southeast, and to the south by the Mesoproterozoic Choma-Kalomo block and the |  | | Journal (article/letter/editorial) | | from 16 intrusions in Lesotho, the Republic of South Africa, and Tanzania have been investigated. The following...the kimberlite is present in the form of zircon. Ilmenite, which contains 546--1190 ppm Zr (MITcI-mLL et...SVlSERO 1973) and magnesian ilmenite (WHITELOCK 1973, p. 255). Ilmenite-zircon intergrowths are particularly...particularly common at Monastery mine (WHITELOCK 1973). Among the inclusions in zircon, chrome-diopside was...diamond, magnesian ilmenite and phlogopite in the zircons from Kao and Monastery mines. Recently, we |  | | Journal (article/letter/editorial) | | of Cape Town, Private Bag, Rondebosch 7700, South Africa* Abstract. Petrographic and chemical criteria...though markedly more abundant in the megacrystrich Monastery kimberlite, is Fe-rich relative to rim compositions...of the South African kimberlites and both from Kentucky. The kimberlites from southern Africa for which...across the sub-continent (Letseng-la-terai and Monastery in the east, de Beers, Sover, Bellsbank and Newlands...Letseng-la-terai from Gurney and Ebrahim (1973)]. The Monastery kimberlite, which is also on the craton, is classified |
|
