 | | 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) | | 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...than the peridotites. Megacrysts of apple-green diopside, which are commonly sheared and which commonly...is 55% olivine, 28% enstatite, 10% garnet, 4% diopside and 3% phlogopite. CHEN (1971) gave modes for |  | | Journal (article/letter/editorial) | | several other pairs from South African kimberlites for comparison. In the lunar and South African samples the...breccia 60016; 2 = Monastery Mine, South Africa [4]; 3 = Frank Smith Mine, South Africa [5]; 4 = Skaergaard...extraordinary event. Accordingly, we prefer melting of a local il- menite-orthopyroxene cumulate in response to...Enstatite ilmenite and diopside-ilmenite intergrowths from the Monastery Mine, Carnegie Inst. Washington...orthopyroxene and ilmenite from Frank Smith mine near Barkly West, South Africa, Trans. Geol. Soc. S. Afr. 76 (1973) |  | | Journal (article/letter/editorial) | | OF DIAMOND BASED ON THERMOBAROMETRY OF CHROMIAN DIOPSIDE INCLUSIONS PAOLO NIMIS§ Dipartimento di Mineralogia...P for over one-hundred inclusions of chromian diopside (mostly isolated) in diamond crystals containing...crystals. The results support the use of chromian diopside thermobarometry as a complementary tool for assessment... Keywords: diamond, thermobarometry, chromian diopside, inclusions, upper mantle. SOMMAIRE JusquâĂ ce...utilisant plus dâune centaine dâinclusions de diopside chromifère (grains isolĂŠs pour la plupart) dans |  | | Report (chapter) | | Library, CandelĂĄria Church and SĂŁo Bento Brasil Monastery â used gneissic rocks (generically called âphacoidal...the Carrara region emigrated to the south region of Brazil (state of Rio Grande do Sul). But even with...company, established in Rio de Janeiro, traversed the state of Minas Gerais in search of deposits of marbles...granites to supply the company. Thus, in the municipality of Mar de Espanha, in the region of Juiz de...in the state of Rio de Janeiro, and in the regions of Sete Lagoas and Ouro Preto, in the state of Minas |  | | Journal (article/letter/editorial) | | which suggest a common origin. Two groups of diopside megacrysts from Mbuji-Mayi are distinguished on...megacrysts are similar to those from metasomatized South African mantle lherzolites. The differences in composition...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...variety of megacryst mineral species: Mg-ilmenite, diopside, pyrope, zircon, baddeleyite, corundum, Mg-chlorite |  | | 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...systematic increase in the solid solubility of diopside component in Ca2_ ^ 5MgT 3Al2Si30i2 garnet with...Iherzolite nodules in kimberlites(from Lesotho and South Africa) and were analysed for isotopic compositions...208/204=36.85) is similar to the least radiogenic diopside sample reported by Kramers(1977), and plots on |  | | 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) | | 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) | | pyroxene-ilmenite intergrowths among xenoliths from South African Kimberlites is described. Chemical analyses...kimberlites of the Monastery Mine(Winberg Area, Orange Free State), the Frank Smith Mine (NW of Barkly West...kimbeflites from Tanganyika. He described the Monastery mine inclusions as "sheets of ilmenite in perfect...more probably, diopside. His description of the similar inclusions from the Frank Smith mine established...ilmenite was diopside, although there was also evidence of some alteration of the primary diopside to brown |  | | Journal (article/letter/editorial) | | Kimberlite-hosted diamond deposits of southern Africa: A review Matthew Field a,â, 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) | | Bntain The MARID (mica-amphibole-rutile-ilmenite-diopside) suite of xenoliths in kimberlite J. BARRY DAW~QN...proportions of mica, amphibole, rutile, ilmenite and diopside. Banding of some specimens is interpreted as cumulate...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...the minerals phlogopite, potassic-richterite and diopside; ilmenite and rutile are the more common accessories |  | | Book | | ............................ 126 5.3.3.2. West Africa ........................................... 126...11. 6.12. 6.13. 6.14. 6.15. 6.6.3 .1. Diverse South African Kimberlites (Dawson and Smith 1975, Smith...7.2. 2. Compositional Variation of Contamination-Free Kimberlites .......... 7.2 .2 .I. Intra-kimberlite.......................... 437 KIMBERLITES Ex Africa semper aliquid novi. Pliny The Elder, Natural...confluence of the Vaal, Orange, and Riet Rivers of South Africa in 1866-1867. The ebb and flow of prospecting |  | | Journal (article/letter/editorial) | | data are reviewed for amphiboles occurring in Cr-diopside series and Al-augite series xenoliths; as megacrysts...pargasites and titaniferous pargasites occurring in Cr-diopside series blocks have formed under upper-mantle conditions...or bronzite with an emerald green chromiferous diopside; small amounts of chrome spinel or pyrope garnet...gabbros. Various names are used such as the Cr-diopside and Al-augite groups (Wilshire and Shervais, 1975)...rocks occur in a variety of tectonic settings. The South African kimberlites and the examples from the Colorado |  | | Journal (article/letter/editorial) | | American Research Laboratories, Johannesburg, South Africa Abstract. The anhydrous solidus of a natural...clinopyroxene-ilmenite intergrowth from the kimberlite pipe at Monastery was found to be 1300 ~ C at 20 kb increasing to...From a textural and petrochemical study of the Monastery xenoliths, Dawson and Reid (1970) suggested that...minimum melt of 50+10wt-% geikielite/50+_10wt-% diopside and was used as evidence in support of the eutectic...quenched lamellae intergrowths between lathshaped diopside and dendritic ilmenite (Fig. 2), particularly |  | | Journal (article/letter/editorial) | | the Lesotho kimberlites (Nixon and Boyd 1973a), Monastery (Gurney et al. 1979; Moore et al., 1992; GriďŹn...Jagersfontein (Hops et al. 1989, 1992) in southern Africa. (The locations of these and other southern African...Smithââ diopside suite is also present in the Nouzees kimberlite in North-West Province, South Africa (Jones...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 diďŹerent and non-overlapping |  | | Journal (article/letter/editorial) | | 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...and BĂźttner, 2019 [45] Monastery kimberlite, Kaapvaal craton, South Africa ol cc, phl, spl (low Al...Figure 1 (A) Polymineralic inclusion within a Cr-diopside megacryst (cpx) surrounded by a spongy rim, micro-melt...within olivine megacrysts from the Monastery kimberlite, South Africa, favored an âentrapped liquid hypothesisâ |  | | Journal (article/letter/editorial) | | and Allen, 1973), diopside and pyrope megacrysts from the Monastery Mine, South Africa, and omphacite and...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)...temperature scale of Davis and Boyd (1966) on the Fe-free system is shown for a reference. Considering the |  | | Journal (article/letter/editorial) | | megacrysts from the Jagersfontein kimberlite, South Africa J.B. DAWSON' and J.V. SMITH2 'Department o f...megacrysts from the Jagersfontein kimberlite, South Africa. In: W.L. Griffin (Editor), Second International...omphacite eclogites on the one hand and the Ti-pyrope/diopside griquaites on the other are quite unambiguous...Science Publishers B.V. Jagersfontein kimberlite, South Africa, some of the megacrysts, namely large single...variations result in differing (calculated)jadeite: diopside contents are well illustrated in Fig. 2, which |  | | 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 |  | | 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) | | from 16 intrusions in Lesotho, the Republic of South Africa, and Tanzania have been investigated. The following...common at Monastery mine (WHITELOCK 1973). Among the inclusions in zircon, chrome-diopside was reported...ilmenite and phlogopite in the zircons from Kao and Monastery mines. Recently, we again found an inclusion of...of phlogopite in zircon from the Monastery mine (Fig. 1). A semiquantitative analysis proved the mica...phlogopite inclusions in the zircons from Kao and Monastery mines are deficient of cations in the tetrahedral |  | | Journal (article/letter/editorial) | | understand the nature of the upper mantle in southern Africa and the processes that have modified it, including...within or near the Kaapvaal craton 1 of southern Africa (Figure 1) and it is the study of the geological...harzburgite nodules from kimberJites in southern Africa. Pyrolite quoted from Ringwood (1975). Table 1...geotherm). 292 NIXON ET AL Two nodules from Monastery Mine (2713 and 2771) contain relatively large amounts...that the depleted nodules were originally garnet-free cumulative assemblages equilibrating with kimberlitiC |  | | Book (volume) | | ANDWILLIAMSON MINE, TANZANIA H.-M. Tsai, O. A. Meyer, 0. Moreau, and H. Judith Milledge REGIONAL AND LOCAL VARIATIONS...KIFYBERLiTES IN THE COLORADO-WYCâ˘ING STATE mINE DISTRICT 42 M. E. McCal!um, C. D. Mabarak, and H... K. J. Stracke, 59 OF KIMBEHLITES H.-M. IN SOUTH-EASteRN AUSTRALIA 71 J. Ferguson, an⢠L. P. Black...CARBONATITEERUPTIVES AT SALTPETRE 111 KOP, SUâ˘}tERLAND, SOU'iH AFRICA J. R. â˘cIver and J. Ferguson Mâ˘NERALOGY AND PETROLOGY...MINERAL CHEMISTRY OF A KIMBERLITE FROM THE PRâ˘Iâ˘IER MINE: Iâ˘iPLICATIONS FOR THE EVOLUTION OF KiFmEHLITIC |
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