 | | 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) | | Mineralogist, Volume 68, pages 494-505, 1983 Lindsleyite (Ba) and mathiasite (K): two new chromium-titanates...Department of Geochemistry University of Cape Town, Republic of South Africa arro R. V. DnNcurrq2 Anglo-American...ResearchLaboratory Crown Mines, Johannesburg, Republic of South Africa Abstract Two new opaquemineralsare describedfrom...edon 38 oxygens,give the followingformulae: lindsleyite: A M mathiasite:A M = : = : Ban.62Srs q3 a1Ca6...strongestreflectionsare 2.13,1.80, 1.59,and 1.444 (all100) for lindsleyite,and 2.25(90),2.14(100), and 1.44A (tOO)for mathiasite |  | | Journal (article/letter/editorial) | | Abstract Kimberlite magmas from the Kimberley area of South Africa have sampled two main types of phlogopite-rich...and metasomatised, the upper mantle beneath the Kimberley area as indicated by the trace element characteristics...Geological Sciences, University of Cape Town, 7700 Rondebosch, South Africa Editorial responsibility: T.L...xenoliths have been known from the kimberlites of Kimberley for at least 80 years (e.g. Wagner 1914), it was...(1936) referred to phlogopite-rich xenoliths in South African kimberlites as ‘‘glimmerites’’. However |  | | Journal (article/letter/editorial) | | magma evolution of the De Beers dyke (Kimberley, South Africa) Ashton Soltys 1 & Andrea Giuliani 1,2...intrusion bordering the De Beers pipe (Kimberley, South Africa). Petrographic features and mineral compositions...intrusions of the main Kimberley pipes (i.e., Wesselton, De Beers, Bultfontein). However, the composition...distinct from those in ‘evolved’ intrusions of the Kimberley cluster (e.g., Benfontein, Wesselton water tunnel... Crystallisation sequence . Melt evolution . Kimberley Introduction Editorial handling: B. Kjarsgaard |  | Giuliani, Andrea, Phillips, David, Maas, Roland, Woodhead, Jon D., Kendrick, Mark A., Greig, Alan, Armstrong, Richard A., Chew, David, Kamenetsky, Vadim S., Fiorentini, Marco L. (2014) LIMA U–Pb ages link lithospheric mantle metasomatism to Karoo magmatism beneath the Kimberley region, South Africa. Earth and Planetary Science Letters, 401. 132-147 doi:10.1016/j.epsl.2014.05.044 | Journal (article/letter/editorial) | | metasomatism to Karoo magmatism beneath the Kimberley region, South Africa Andrea Giuliani a,∗ , David Phillips...titanate U–Pb geochronology mantle metasomatism Kimberley Karoo magmatism a b s t r a c t The Karoo igneous...igneous rocks (174–185 Ma) of southern Africa represent one of the largest continental flood basalt provinces...post-Karoo kimberlites in southern Africa. Here we report U–Pb ages for lindsleyite–mathiasite (LIMA) titanate...xenoliths from the ∼84 Ma Bultfontein kimberlite (Kimberley, South Africa), located in the southern part |  | | Journal (article/letter/editorial) | | African Localities T o complement the Minerals of Africa theme of the 2002 Tucson Gem and Mineral Show,...88; Namibia is next with 73; the Republic of South Africa is third with 65; together they represent about...immediately leap to mind at the very mention of Africa, David Livingstone (18 13-73) and Henry Morton...for them, but neither species was first found in Africa; Mexico and Peru are the type localities for livingstoneite...appropriately discovered in a famed Kimberley diamond pipe in South Africa (see Who’s Who in Mineral Names |  | | Journal (article/letter/editorial) | | of Geochemistry, University of Cape Town, Rondebosch 7700 (South Africa) Received February 20, 1985; revised...mantle beneath the northern Lesotho margin of the Archaean craton in southern Africa are inferred to have...garnet lherzolite xenoliths from beneath the Kimberley area in the craton interior display internal isotopic...similar Cretaceous age, Bultfontein (Kimberley district) and Thaba Putsoa (northern Lesotho), was undertaken...orthopyroxene compositions indicate haba Putsoa Bultfontein (Kimberley cluster) 0 i . . . . 500 i km Fig |  | | Report (issue) | | 6/m2/m2/m. As grains, to 100 µm, surrounded by lindsleyite, oriented in spinel. Physical Properties: Hardness...12.52 0.10 0.55 Total 99.30 (1) Bultfontein mine, South Africa; by electron microprobe, average of...richterite, diopside, magnesian chromian spinel, lindsleyite, mathiasite, niobian chromian rutile, magnesian...Distribution: From the Bultfontein diamond mine, Kimberley, Cape Province, South Africa. Name: For John Barry...Geologist (Diamonds), DeBeers Consolidated Mines, South Africa, in honor of his contributions to studies of |  | | Journal (article/letter/editorial) | | in polymict xenoliths from the Bultfontein kimberlites, South Africa: implication for low bulk-rock oxygen...Polymict mantle xenoliths from the Bultfontein kimberlites, South Africa, contain abundant ilmenites (30%...of Geochemistry, University of Cape Town, Rondebosch 7700, South Africa Editorial responsibility: T.L...homogeneous high-Ti silicate melt. Keywords South Africa á Polymict xenolith á Oxide mineral á Ilmenite...Examples are armalcolite and exotic oxides, such as lindsleyite-mathiasite (LIMA) and yimengitehawthorneite (YIHA; |  | | Journal (article/letter/editorial) | | 1990 Silicate-bearingrutile-dominatednodulesfrom South African kimberlites: Metasomatizedcumulates DaNrrr...Kampfersdam and Jagersfonteinkimberlite pipes in South Africa contain euhedral olivines and spinels,graphic...In a similar nodule from the Pulsator dump in Kimberley, rutile and ilmenite are graphically intergrown...rutile, ilmenite, armalcolite, and members of the lindsleyite-mathiasite group (LIMA) have been proposedas...Haggerty,1987),and Jagersfontein and Kampfersdam in South Africa (Haggerty, 1983; Schulze,1983; Tollo and Haggerty |  | | Report (issue) | | Lindsleyite (Ba, Sr)(Ti, Cr, Fe, Mg, Zr)21O38 c 2001-2005 Mineral Data Publishing, version 1 Crystal...10.37 c = 20.52 Z=3 X-ray Powder Pattern: South Africa. 2.13 (100), 1.80 (100), 1.59 (100), 1.44 (100)...29 17.19 Total 99.78 99.08 (1) De Beers mine, South Africa; by electron microprobe, all Fe as FeO, RE2...phase in veinlets in metasomatized kimberlite (South Africa). Association: Mathiasite, phlogopite, perovskite...spinel (South Africa). Distribution: From the De Beers and Bultfontein diamond mines, Kimberley, Cape Province |  | Haggerty, Stephen E., Grey, Ian E., Madsen, Ian C., Criddle, A. J., Stanley, C. J., Erlank, A. J. (1989) Hawthorneite, Ba[Ti3Cr4Fe4Mg]O19: A new metasomatic magnetoplumbite-type mineral from the upper mantle. American Mineralogist, 74 (5-6) 668-675 | Journal (article/letter/editorial) | | of Geochemistry,University of Cape Town, Rondebosch,7700, South Africa AusrRAcr A new opaque mineral...from a diamondiferous kimberlite pipe in Kimberley, South Africa. The new mineral, hawthorneite (- 100 pm...maximum dimension), is in intimate associationwith lindsleyite (Ba,Sr)(Ti,Cr.. .)r,Orr, a member of the crichtonite...replaces(Mg + Cr) in spinel. Continued reaction yields lindsleyite. Conditions of formation are estimated at 900-1... By contrast, the assemblage hawthorneite * lindsleyite is Ba specific.The small (M) cations in theseminerals |  | | Journal (article/letter/editorial) | | lamproite Frances G. Waters Department of Geochemistry, University of Cape Town, Rondebosch, Cape 7700,... South Africa Abstract. Chemical, mineralogical and isotopic studies have been made on nodules of the...which are mostly from Bultfontein, with some from other pipes of the Kimberley cluster, and two from...from Newlands, ~ 60 km north-west of Kimberley. Olivine is absent from MARID rocks and enstatite is only...I D nodule collected by L. Daniels from Newlands mine (a Group II kimberlite), has a 2 cm wide rind of |  | | Journal (article/letter/editorial) | | SPINEL MACROCRYSTS FROM KIMBERLITES IN SOUTHERN AFRICA DANIEL J. SCHULZE§ Department of Geology, University...single-crystal macrocrysts in kimberlites from southern Africa (approximately 1500 grains from 20 kimberlites...from a variety of mantle xenoliths from southern Africa and North America (approximately 150 xenoliths)...Unusually Fe- and Ni-rich macrocrysts unique to the Lace mine are from Fe-rich orthopyroxene-bearing peridotites...kimberlite, chromian spinel, magnesiochromite, southern Africa. SOMMAIRE Je présente ici une comparaison, en |  | | Journal (article/letter/editorial) | | in relatively small geographical areas such as northern Tanzania, xenoliths from di€erent eruptive sites...xenoliths from kimberlite, specimens from Kimberley, South Africa have formed the basis of several metasomatism...phases are priderite and Ba-Sr-K titanates (lindsleyite, mathiasite and hawthorneite). From these studies...veined and metasomatised harzburgite xenolith from Kimberley which provides evidence for further metasomatic...from the kimberlite waste dump at Boshof Road, Kimberley. It is an angular block measuring approximately |  | | Journal (article/letter/editorial) | | Phlogopite Zoning Magma ascent Mantle xenoliths Kimberley a b s t r a c t Kimberlite magmas are of economic...data for phlogopite from the Bultfontein kimberlite (Kimberley, South Africa; i.e. the kimberlite type-locality)...microcrysts (between ~0.1 and 0.3 mm) in the Bultfontein kimberlite display concentric compositional zoning...and groundmass grains in the Bultfontein kimberlite (Kimberley, South Africa (Fig. 1); i.e. the kimberlite...xenoliths entrained by the Kimberley kimberlites. Phlogopite grains in the Bultfontein kimberlite exhibit multiple |  | | Journal (article/letter/editorial) | | Cretaceous to late Jurassic) kimberlites in the Kimberley area. The metasomatic style is characterized by...emplacement ages of group I kimberlites in the Kimberley area dated at 83 ‹ 4 (2r) and 84 ‹ 0.9 Ma. One...both group I and II kimberlite magmatism in the Kimberley area. MARID and PKP zircon ages are also consistent...1975; Smith 1983) and cluster around 85 Ma in the Kimberley area. Konzett et al. (1995, 1998), using SHRIMP...K-titanate and calcite. A Ba-dominant member of the lindsleyite± mathiasite (LIMA) series was found as a single |  | | Journal (article/letter/editorial) | | Cretaceous kimberlite of the central Kaapvaal Craton, South Africa. Two episodes of interaction between the host...phlogopite + K-richterite + crichtonite-group (lindsleyite–mathiasite) phases + Nb– Cr-rich rutile + srilankite...emplacement ages of Cretaceous kimberlites in the Kimberley area. The age spread is interpreted as a result...al. / Lithos 182–183 (2013) 165–184 South Africa. In the Kimberley area numerous Cretaceous kimberlites...xenolith sampled by one of the kimberlites of the Kimberley cluster from the central Kaapvaal Craton, for |  | Fitzpayne, Angus, Giuliani, Andrea, Harris, Chris, Thomassot, Emilie, Cheng, Chen, Hergt, Janet (2019) Evidence for subduction-related signatures in the southern African lithosphere from the N-O isotopic composition of metasomatic mantle minerals. Geochimica et Cosmochimica Acta, 266. 237-257 doi:10.1016/j.gca.2019.02.037 | Journal (article/letter/editorial) | | 2109 New South Wales, Australia 3 Department of Geological Sciences, University of Cape Town, Rondebosch...Rondebosch 7700, South Africa 4 Centre de Recherches Pétrographiques et Géochimiques-CNRS, Université...iopside) rocks – from the Bultfontein kimberlite (Kimberley, South Africa), which show varying degrees...crustal component occurred in the source of the Kimberley kimberlites, or was assimilated during interaction...cratonic regions such as the Kaapvaal in southern Africa indicates a complex evolutionary history for the |  | | Report (issue) | | 10.361 c = 20.65 Z=3 X-ray Powder Pattern: South Africa. 2.14 (100), 1.44 (100), 2.25 (90), 2.99 (80)...0.01 (1) Jagersfontein, Bultfontein, and Kolonkwanen kimberlites, South Africa; by electron microprobe...from metasomatized kimberlite (South Africa). Association: Lindsleyite, olivine, diopside, phlogopite...Mg–Cr spinel, ilmenite, perovskite, titanite (South Africa); yimengite (Shandong Province, China). Distribution:...the Jagersfontein diamond mine, Free State, and the Bultfontein diamond mine and Kolonkwanen kimberlite |  | | Journal (article/letter/editorial) | | of some peridotites from the Kaapvaal craton (South Africa) Received: 27 October 2005 / Accepted: 15 January...in peridotite xenoliths from Kaapvaal craton (South Africa) provided compelling evidence for the occurrence...high-grade Archean Terranes: the Western Terrane, the South-Eastern Terrane, the Central Terrane and the Pietermaritz...kimberlite pipes of the Kimberley area (De Beers Mine; Bultfontein, Kimberley, South Africa) and Jagersfontein...Jagersfontein (Fig. 1). In the South-Eastern Terrane, samples come from several diamondiferous kimberlite localities |  | Abersteiner, Adam, Kamenetsky, Vadim S., Goemann, Karsten, Golovin, Alexander V., Sharygin, Igor S., Giuliani, Andrea, Rodemann, Thomas, Spetsius, Zdislav V., Kamenetsky, Maya (2019) Djerfisherite in kimberlites and their xenoliths: implications for kimberlite melt evolution. Contributions to Mineralogy and Petrology, 174 (1) doi:10.1007/s00410-018-1540-8 | Journal (article/letter/editorial) | | obtained from the mine dumps of the Bultfontein (Group I, or archetypal) kimberlite (South Africa) and comprise...comprise a spinel harzburgite, lindsleyite [(Ba,Sr)(Ti,Cr,Fe,Mg)21O38]-–mathiasite [(K,Ca,Sr)(Ti,Cr,Fe,Mg)21O38]...Roberts Victor orangeite (or Group II kimberlite; South Africa). 3. Nine kimberlite rock samples from the Udachnaya-East...harzburgite XM1/422 Bultfontein kimberlite (Group I), Kaapvaal Craton (South Africa) ~ 84 Ma (Allsopp and...djerfisherite LIMA-bearing lherzolite Coarse-grained lindsleyite [(Ba,Sr) XM1/362 (Ti,Cr,Fe,Mg)21O38]–mathiasite |  | | Journal (article/letter/editorial) | | diamondiferous district, Siberian craton) is the worldwide renowned primary diamond mine, which carries...xenoliths carried out by kimberlite magmas in South Africa (Haggerty 1975, 1983, 1988, 1989; Jones et al...the central part of the Udachnaya-East open-pit mine at the depth interval 620–640 m. The xenolith is...compositions of magnetoplumbite-group minerals from South Africa (Haggerty et al. 1989), China (Dong et al. 1984;...0.500 0.470 0.012 0.022 13.439 1.004 LIMA (South Africa) K Figure 6. A-site occupancy of the studied |  | Giuliani, Andrea, Woodhead, Jon D., Phillips, David, Maas, Roland, Davies, Gareth R., Griffin, William L. (2018) Titanates of the lindsleyite–mathiasite (LIMA) group reveal isotope disequilibrium associated with metasomatism in the mantle beneath Kimberley (South Africa) Earth and Planetary Science Letters, 482. 253-264 doi:10.1016/j.epsl.2017.11.014 | Journal (article/letter/editorial) | | www.elsevier.com/locate/epsl Titanates of the lindsleyite–mathiasite (LIMA) group reveal isotope disequilibrium...with metasomatism in the mantle beneath Kimberley (South Africa) Andrea Giuliani a,b,c,∗ , Jon D. Woodhead...xenoliths Sr isotope disequilibrium metasomatism Kimberley * a b s t r a c t Radiogenic isotope variations...isotope heterogeneity between coeval Ti-rich LIMA (lindsleyite–mathiasite) minerals at the time of their formation...mantle xenoliths from the ∼84 Ma Bultfontein kimberlite (South Africa). Previous U/Pb dating of the LIMA |  | | Journal (article/letter/editorial) | | trace-element trends in xenoliths from Kimberley, South Africa C.J. Hawkesworth 1, A.J. Erlank 2, P.D...of Geochemistry, Universityof Cape Town, Rondebosch 7700 (South Africa) (Received November 23, 1988;...trace-element trends in xenoliths from Kimberley, South Africa. Chem. Geol., 85: 19-34. Modal metasomatism...metasomatism in peridotite xenoliths from Kimberley, South Africa, is observed in the development of phlo,gopite...metasomatised peridotites from the Kimberley area in southern Africa. Previous studies have concentrated |
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