 | | 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" |  | | 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. |  | | 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) | | Accepted Manuscript New constraints on archetypal South African kimberlite petrogenesis from quenched glass-rich...Steffen H. Büttner , New constraints on archetypal South African kimberlite petrogenesis from quenched glass-rich... ACCEPTED MANUSCRIPT New constraints on archetypal South African kimberlite petrogenesis from quenched glass-rich...Rondebosch 7701, South SC 1 RI Geoffrey H. Howarth1,2,* and Steffen H. Büttner3 Africa Department of...Geology, Rhodes University, Grahamstown 6040, South Africa NU 2 AC CE PT E D MA *Corresponding |  | | Journal (article/letter/editorial) | | Greenland and Africa have been determined and shown to be held by apatite (mainly F) and phlogopite (mainly...represented by six ultrabasic xenoliths from southern Africa (none has been found in the Indian kimberlites)...also investigated since this is relatively volatile-free. MATERIAL STUDIED Over half the specimens analysed...be divided in two groups; those from central and south India. The central Indian samples are serpentinised...depth. Phenocrysts of phlogopite up to 0.5 cm across are often present. The south Indian samples, especially |  | | 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...Eclogites and glimmerites (granular or sheared phlogopite-rich nodules; DAWSON and Slmr~, 1977), and amphibolites...analyses of olivine, pyroxene, garnet, chromite and phlogopite, each of which is an average of three or more |  | | 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) | | 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 |  | 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) | | abrasion of zircon and ilmenite megacrysts in the Monastery kimberlite: Implications for the composition of...ilmenite and zircon megacrysts from the Monastery kimberlite (South Africa) represent a textbook example of...including silicates (nepheline, kalsilite, sodalite, phlogopite–tetraferriphlogopite), titanates (priderite,...orthopyroxene and ilmenite, whereas olivine, phlogopite and zircon are less common (e.g. Gurney et al...exploration. The “classic” megacryst suite in the Monastery kimberlite, renowned for the size of its crystals |  | 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) | | geochemistry of ilmenite megacrysts from the Monastery kimberlite, South Africa R . O . M o o r e a, W . L . G r...Geochemistry, University of Cape Town, Rondebosch 7700, South Africa bDivision of Exploration Geoscience, CSIRO,...from the Monastery kimberlite, South Africa. Lithos, 29: 1-18. Ilmenite megacrysts in the Monastery kimberlite...megacryst suite (cpx, opx, garnet, Fe-rich olivine, phlogopite and zircon). The ilmenites show systematic variations...sequence of the Monastery megacryst suit is ilmenite+cpx+garnet+opx, followed by ilmenite+phlogopite, then ilmenire |  | | Book | | calcite, clay minerals and fragments of crustal and local host country-rock. At Lattavaram the kimberlite... fine grained matrix of serpentine, calcite, phlogopite and magnetite-rich spinel. Minor monticellite...consists predominantly of serpentine, calcite, minor phlogopite and opaque phases. 94550 I including spinel...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 |  | | Book | | ............................ 126 5.3.3.2. West Africa ........................................... 126.... . . . . . . . . . . . . . . . . . . . 6.6. Phlogopite . . . . . . . . . . . . . . . . . . . . . . ...Macrocryst Phlogopite (Paragenesis 1) ..................... 6.6.2. Groundmass/Microphenocryst Phlogopite (Paragenesis...11. 6.12. 6.13. 6.14. 6.15. 6.6.3 .1. Diverse South African Kimberlites (Dawson and Smith 1975, Smith.... . . . . . . . . . . . . . . . . . 6.6.3.9. Phlogopite Macrocrysts with Reversed Pleochroism . . . |  | | Journal (article/letter/editorial) | | garnets from the subcontinental mantle of southern Africa David R. Bell and George R. Rossman Division of...occurring as xenoliths in kimberlites of southern Africa. OH abundances, using the best currently available...garnets from coarse peridotites, including several phlogopite-bearing samples are typically less than 20 ppm...garnets from the wellstudied kimberlites of southern Africa, and to determine if these variations are linked...from xenoliths erupted in kimberlites of southern Africa. This area was chosen for study due to ready sample |  | | Journal (article/letter/editorial) | | inclusions composed of K-rich hydrated phases (phlogopite and amphibole), fresh glass and Cr-spinels are...megacrysts are similar to those from metasomatized South African mantle lherzolites. The differences in composition...characterized by the development of new mineral phases (phlogopite, amphibole, oxides) and/or the replacement of...general context of kimberlites of Central and South Africa. Inset from Foster et al. (2001). Burgess and...(Tshibua-Kalonji) and outcrop about 30 km to the south-west. The diatremes of the northern group cut across |  | | Journal (article/letter/editorial) | | Magmatic System: Megacrysts from the Monastery Kimberlite, South Africa DAVID R. BELL1*, GEORGE R. ROSSMAN1...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...restricted (Gurney et al., 1979), and (2) that local chemical and isotopic equilibrium is a strong feature |  | | Journal (article/letter/editorial) | | from 16 intrusions in Lesotho, the Republic of South Africa, and Tanzania have been investigated. The following...Ilmenite-zircon intergrowths are particularly common at Monastery mine (WHITELOCK 1973). Among the inclusions in zircon...diamond, magnesian ilmenite and phlogopite in the zircons from Kao and Monastery mines. Recently, we again...again found an inclusion of phlogopite in zircon from the Monastery mine (Fig. 1). A semiquantitative analysis...been shown that these phlogopite inclusions in the zircons from Kao and Monastery mines are deficient of |  | | Report (chapter) | | mantle events and diatreme ascent rates in southern Africa and Malaita, Solomon Islands JO-ANNE WARTHO* &...mantle. With the realization that some Ar/Ar phlogopite grain core ages may be indicative of geological...and megacrysts from Kimberley, Monastery and Letseng in southern Africa, and Malaita, in the Solomon Islands...Islands, to test whether other mantle phlogopite cores may yield meaningful ages. Modelling of Ar diffusive...diffusive loss profiles from phlogopite grain boundaries to cores provides information on both the eruption |  | | Journal (article/letter/editorial) | | Accepted Manuscript Olivine megacryst chemistry, monastery kimberlite: Constraints on the mineralogy of the...the HIMU mantle reservoir in southern Africa Geoffrey H. Howarth PII: DOI: Reference: S0024-4937(18)30239-1...Geoffrey H. Howarth , Olivine megacryst chemistry, monastery kimberlite: Constraints on the mineralogy of the...the HIMU mantle reservoir in southern Africa. Lithos (2018), doi:10.1016/j.lithos.2018.07.007 This is... ACCEPTED MANUSCRIPT Olivine megacryst chemistry, Monastery kimberlite: Constraints on the mineralogy of the |  | | Journal (article/letter/editorial) | | lherzolite nodules containing K-richterite and/or phlogopite are products of series of metasomatic reactions...garnet lherzolites and two lherzolites containing phlogopite and K-richterite were studied. The sample localities...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 |  | | Journal (article/letter/editorial) | | crystallized. INTRODUCTION NODULES dominated by phlogopite occur in the Bultfontein, De Beers, Wesselton...Wesselton and Dutoitspan kimberlite diatremes, S. Africa (WAGNER, 1914; WILLIAMS, 1932), in several other S....ERLANK and FINGER (1970) and AOKI (1974). Although phlogopite usually dominates, amphibole, clinopyroxene,... giving such varieties as phlogopite-ilmenite rocks from the De Beers Mine (WILLIAMS, 1932), mica-apatite...mica-apatite rock, Newlands Mine (WAGNER, 1914), phlogopiteeolivine rocks from several Yakutia localities (FRANTSESSON |  | | Journal (article/letter/editorial) | | dolomite) and hydrous silicate minerals (e.g., phlogopite, serpentine, chlorite) within polymineralic inclusions...are clinopyroxene, garnet, olivine, ilmenite, phlogopite, contained within megacrysts from kimberlites...are clinopyroxene, garnet, olivine, ilmenite, phlogopite, rich suite [29–31]. The origin of megacrysts...et al. [44];ettheir 2. Polymineralic diamondmine, mine, Slave craton, Canada (modified after Bussweiler...Gurney et al., 1979 [32] Monastery kimberlite, Kaapvaal craton, South Africa ol Ti-rich phl, ol, spl |  | | Journal (article/letter/editorial) | | University of the Witwatersrand, Johannesburg 2001 (South Africa) (Received April 5, 1982; revised and accepted...localities); of these, five (the Kimberley pipes and Monastery) are certainly post-Karroo .- ' ' ' t._-',~,..." o ! 5 00 ! Fig. 1. Sketch map of southern Africa with localities of pipes studied (1 = Kimberley...Bultfontein Wesselton, Dutoitspan pipes; 2 = Monastery ; 3 = Goadgevonden ; 4 = Beit Bridge; 5 = Colossus;...for whole-rock or for mineral separation, were as free of xenoliths or xenocrysts as possible. Often this |  | | Journal (article/letter/editorial) | | Garnet Lherzolites from the Kaapvaal Craton (South Africa): Trace Element Evidence for a Metasomatic History...SCIENCES, UNIVERSITY OF CAPE TOWN, RONDEBOSCH 7701, SOUTH AFRICA 2 DEPARTMENT OF EARTH, ATMOSPHERIC AND PLANETARY...have trace element similarities to those of PIC (Phlogopite± Ilmenite±Clinopyroxene) rocks appear to have...features of mantle peridotite xenoliths of southern Africa JOURNAL OF PETROLOGY VOLUME 44 so that it is...enite± Diopside; Dawson & Smith, 1977), PKP (Phlogopite and K-richterite-bearing Peridotites; Erlank |  | | Journal (article/letter/editorial) | | is not a major alkali and water storage site; phlogopite is a more likely candidate, particularly in the...occurrence in xenoliths transported by kimberlites, phlogopite has become regarded as the dominant volatile-bearing...in order to complement the earlier reviews on phlogopite. The evidence for origin in the upper mantle...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) | | pyroxenites from the Gansfontein kimberlite, South Africa: Evidence for megacryst magma – mantle interaction...Town, Rondebosch 7700, South Africa P.O. Box 31316, Tokai 7966, South Africa e-mail: geo-odyssey@ananzi...Sciences, University of Cape Town, Rondebosch 7700, South Africa Department of Geological Sciences and Department...Department of Chemistry and Biochemistry, Arizona State University, Tempe AZ 85287-1604, USA. e-mail: David...7700, South Africa e-mail: aleroex@geology.uct.ac.za © 2004 Geological Society of South Africa ABSTRACT |
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