 | Mills, S. J., Whitfield, P. S., Wilson, S. A., Woodhouse, J. N., Dipple, G. M., Raudsepp, M., Francis, C. A. (2011) The crystal structure of stichtite, re-examination of barbertonite, and the nature of polytypism in MgCr hydrotalcites. American Mineralogist, 96 (1) 179-187 doi:10.2138/am.2011.3531 | Journal (article/letter/editorial) | | Mg6Cr2CO3(OH)16∙4H2O, from the Kaapsehoop asbestos mine, South Africa, have been studied by powder X-ray diffraction...Kaapsehoop asbestos mine, Kaapsehoop, Barberton district, Mpumalanga, South Africa. Barbertonite was initially...only extremely minor (<1 wt%) contamination by lizardite. Two samples of barbertonite, samples 84588 and...98(3) 0.970(3) 0.96(1) Barbertonite, Barberton, South Africa hkl 0 02 0 04 0 10 0 11 0 06 0 12 0 13...used to compensate for structural disorder in lizardite and antigorite during refinement. Raman spectroscopy |  | | Journal (article/letter/editorial) | | Transvaal, South Africa J.E.J. Martini Geological Survey, Private Bag X112, Pretoria, South Africa Received...Ga); 6=Archaean granite-gneiss (3.6-2.7 Ga); 7= Barberton greenstone belt (3.5-3.4 Ga); I = Kalkkloof area;...Complex dip steeply to the WNW, but in the extreme south of the investigated area, the strike changes to...generally poorly exposed. The main minerals are lizardite and, less frequently, chrysotile replacing olivine...antigorite plus variable amounts of dolomite, but lizardite may remain abundant. Tremolite occurs occasionally |  | | Report (issue) | | curve______--_____-___.. The collection of chrysotile and lizardite curves..--Detailed analysis of the curves in the...chrysotile and lizardite curves Con. Detailed analysis of the chrysotile and lizardite curves in the temperature...Mont_________________________ Clinochrysotile and lizardite (deweylite) Forest Hill, Harford County, Md____________________...Md____________________ Clinochrysotile and lizardite, Morris County, N.J____________________--__-____--------___...Clinochrysotile and lizardite, variant form, Morris County, N.J.____________________________ Lizardite plus clinochrysotile |  | | Journal (article/letter/editorial) | | near-surface weathering origin. The 6D values of the lizardite-chrysotile serpentines from all of the ultramafic...position and latitude of the sample locality. The lizardite-chrysotile samples show a progressive change in...Columbia ( - 162 to -205). The 601* values of lizardite-chrysotile range from +8*7 to -5.0 per mil and...such serpentinization, suggest that much of this lizardite-chrysotile serpentinization probably formed by...this type of serpentmization. In contrast to lizardite-chrysotile, the pure antigorites have very restricted |  | | Journal (article/letter/editorial) | | pages 733-735, 1973 Nickel Mineralsfrom Barberton,South Africa: A NickelOlivine Vl. Liebenbergite, SvsneNoA...Metallurgy, I Yale Road.,Milner Park, I ohannesburg,South Alrica Lnwrs C. ClI.x Il. S. GeologicalSuruey,345...Director-General of the National Institute for Metallurgy, South Africa. mission on New Minerals and Mineral Names...trevorite deposit at Bon Accord in the Barberton Mountain Land, South Africa, led to the discovery of two peculiar...paper on the nickel serpentine(a nickel-rich lizardite?) and nickel ludwigite is in preparation. The |  | | Journal (article/letter/editorial) | | Introduction Ever since their initial recognition in the Barberton Mountainland as rocks that formed from highmagnesian...Goodwin (1982) and Pyke (1982). Regional geology Local geology and The Abitibi Greenstone Belt forms part...indicated in Figs. 2 - 7 . More details on the local geology can be obtained from Coad (1979) and Barnes...ram) polyhedral* olivine, now pseudomorphed by lizardite, interstitial low-Ca pyroxene laths (0.2 ram)...polyhedral olivine grains, now pseudomorphed by lizardite, with interstitial low-Ca pyroxene and augite |  | | Catalog/List | | by Hilary Corke 5. LIZARDITE, HYDROTALC, TIATANOHEMATITE mainly yellow lizardite with small white and...fine pale green fibrous mass with some quartz. 3x2 South Norway £6 Selasvatn 9. TOURMALINE dark green elongated...pure metallic mass about 2x4 inches Ratnapure district SriLanka £15 18. BARITE very well formed single...magnetite with minor scheelite, Natas Mine. Okahandja district Namibia £6 38. NATIVE GOLD quite a rich piece...mass with minor Serpentine 2 x2.5 Barberton . Transvaal South Africa 52. PYROPHANITE small reddish-brown |  | de Wit, Maarten, Furnes, Harald, MacLennan, Scott, Doucouré, Moctar, Schoene, Blair, Weckmann, Ute, Martinez, Uma, Bowring, Sam (2018) Paleoarchean bedrock lithologies across the Makhonjwa Mountains of South Africa and Swaziland linked to geochemical, magnetic and tectonic data reveal early plate tectonic genes flanking subduction margins. Geoscience Frontiers, 9 (3) 603-665 doi:10.1016/j.gsf.2017.10.005 | Journal (article/letter/editorial) | | lithologies across the Makhonjwa Mountains of South Africa and Swaziland linked to geochemical, magnetic...Uma Martinez a, f, Sam Bowring g a AEON-ESSRI (Africa Earth Observatory Network-Earth Stewardship Science... Nelson Mandela University, Port Elizabeth, South Africa Department of Earth Science & Centre for Geobiology... Nelson Mandela University, Port Elizabeth, South Africa e Department Geophysics, GFZ - German Research...14473 Potsdam, Germany f GISCAPETOWN, Cape Town, South Africa g Earth, Atmosphere and Planetary Sciences, |  | | Journal (article/letter/editorial) | | opportunities for geological storage or for smaller local CO2 sequestration. However, if the CCSM technology...available are relatively small and could only supply local CO2 capture plants. To achieve significant CO2 capture...(MgzCa content y25%) serpentine group, commonly lizardite, chemical formula Mg3Si2O5(OH)4 (Mg content y25%)...Metall. B) 2014 VOL 123 NO 3 Bushveld, South Africa; Great Dyke, Zimbabwe; Duluth, Canada; Stillwater...common members of the serpentine mineral group: lizardite, chrysotile and antigorite and Ophiolites Ophiolites |  | | Journal (article/letter/editorial) | | intermediate between typical Munro-type and Barberton-type komatiites. Parent magmas for the high-Al...north, changing to lava lakes and sills further south. Olivine-rich channel or conduit facies assemblages...were derived from shallower melting than the Barberton-type komatiites that host mineralisation in Forrestania...ultramafic suite may represent the transition from Barberton-type to Munro-type komatiites, and formed close...also throws further light on the evolution of the south-eastern Youanmi terrane. Downloaded by [George |  | | Journal (article/letter/editorial) | | SUBJECTINDEX TO VOLUME 55 Africa Mineralogy Molybdenite (Frondel,JudithW., er a/.) I l-12 1857 Aluminum..., et al.) tl-tz 1973 Serpentine Chrysotile, lizardite, antigorite (Whittaker,E. J. W., er a/.) 5-6 1025...Mackinawite South Africa. Transvaal. Vlakfontein (Clark. Alan H.) 9-10 1802 South Africa. Transvaal...Crystallography Composition Serpentine, chrysotile, lizardite, antigorite (Whittaker, E J. W , et al.) 5-6 1025...Reservation, Czechoslovakia, Bohemia, Trebenice, South Africa, Kimberley, pyrope 7-8 1374 (Reid, Arch M. |  | | Journal (article/letter/editorial) | | Serpentine Kaolinite, dickite, halloysite Chrysotile, lizardite, amesite Pyrophyllite-talc x - 0 Pyrophyllite...1963). Sungulite and kolskite are mixtures of lizardite and sepiolite, and the names should be discarded...Brindley et al., 1979). Nepouite is a Ni-analogue of lizardite (Glasser, 1907; Maksimovir, 1973; Brindley and...behavior of nickel-containing minerals in the lizardite-nepouite series: Amer. Mineral. 60, 861-871. Brown...minerals from Barberton. II. Nimite, a nickelian chlorite: Nat. Inst. Met. (South Africa)Res. Rep. 344 |  | | Journal (article/letter/editorial) | | and a high pH, e.g., [8,9]. Stichtite from the south Iberia Abyssal Plain in the Atlantic ocean, just...abundant fine-grained magnetite, and are dominantly lizardite, which has replaced olivine-bearing ultramafic...There are also green serpentinites, which are lizardite-chrysotile mixtures with localized deformation...location of Stichtite Hill and the Dundas Mining District, Figure 1. Sample location map, showing the location...location of Stichtite Hill and the Dundas Mining District, Tasmania, Australia (Black Square). Minerals |  | | Journal (article/letter/editorial) | | Miscellaneous Sungulite and,kolskite are mixtures of lizardite and Attention is drawn here to recommendationsmade...behavior of nickel-containing minerals in the lizardite-nepouite seies.Am. M ineral.,60, 861-871. Brown...minerals from Barberton. II. Nimite, a nickelian chlorite. Nat. Inst. Met. (South Africa) Res. Rep., 344...minerals from Barberton. III. Willemseite, a nickelian talc. Nat. Inst. Met. (South Africa) Res. Rep. 353... Jerusalem, I,9'l-105. Maksimovi6, Z. (1973\ Lizardite-nepouite isomorphic seies. Zap. Vses. Mineral |  | Ferreira, Raianny Carolini Ramos, Pinheiro, Marco Aurélio Piacentini, Magalhães, Joana Reis, Novo, Tiago Amâncio, Schorscher, Johann Hans Daniel, Queiroga, Gláucia (2020) Physical volcanology and petrogenesis of the Archean Quebra Osso komatiite flow field, Rio das Velhas greenstone belt, Quadrilátero Ferrífero (Brazil). Lithos, 370. 105626pp. doi:10.1016/j.lithos.2020.105626 | Journal (article/letter/editorial) | | environment. The abundance of autobreccias and local hybrid rocks point out to turbulent percolation...the komatiite type locality, in the Barberton belt (South Africa) (Viljoen Jo u and Viljoen, 1969)...shear zones. They mostly dip 50º to E-SE, with local variations to NE and SW. Despite the post-magmatic...the most common serpentine phase, with minor lizardite related to mesh rims. domains serpentine+tal...texture mesh-textured serpentines (antigorite/lizardite) from e- different portions of the cumulate |  | | Journal (article/letter/editorial) | | billion years ago at Schagen, East Transvaal district, South Africa YUMIKO WATANABE,1,* BRIAN W. STEWART,2...Abstract—A ⬃17-m paleosol sequence at Schagen, South Africa, which developed on a serpentinized dunite intrusion...fragments (and minerals) that were transported from local sources (serpentinite and granite) by fluvial and/or...the paleosol sequence were largely supplied from local sources (mostly serpentinite), but the Ca, Sr, and...areas of the Eastern Transvaal district (Mpumalanga Province), South Africa (Fig. 1). These paleosols developed |  | | Journal (article/letter/editorial) | | aluminium-depleted komatiites (ADK), also known as Barberton-type; and aluminium-undepleted komatiites (AUDK)...are a hallmark of older terrains such as the Barberton Mountainland (Viljoen and Viljoen, 1969) and the...greenstone belt is situated approximately 100 km south of Southern Cross in the Archaean Yilgarn Block...Block of Western Australia. The belt trends north-south and has a broadly synclinal structure (Fig. I). The...kilometres along strike, from Purple Haze in the south to Emu Heights. Digger Rocks area. This area, extending |  | | Journal (article/letter/editorial) | | protolith of the serpentinite initially produced a lizardite septentinite in which some of the secondary magnetite...amphibolite facie8 produced antigorite from the lizardite, while the magnetite rims reacted with the chromite... veins of lizardite (cc-serpentine) enclose mesh centres of randomly orientated lizardite and chrysotile...Serpentine The serpentinite consists of mesh-textured lizardite-chrysotile partly replaced by antigorite, together...pseudomorphic after olivine. It consists of rims of lizardite (a-serpentine) separating sub-rectangular mesh |  | | Journal (article/letter/editorial) | | formed from these elements. Calculations show that local pulses in the production of O2 by photosynthesis...gold and uranium deposits of the Witwatersrand, South Africa. These formations have long been recognized...the 3.2 Ga Moodies Group in the Barberton greenstone belt, South Africa (Hessler et al. 2004). The mineralogical...chalcedony, siderite, calcite, and lizardite (FIG. 4A, B; lizardite is not expected to form during weathering...environment, no O2 would accumulate in the atmosphere. A local pulse in the production of O2 could mobilize Mo |  | Patra, Kiranmala, Anand, R, Balakrishnan, S, Dash, Jitendra K (2020) Geochemistry of ultramafic–mafic rocks of Mesoarchean Sargur Group, western Dharwar craton, India: Implications for their petrogenesis and tectonic setting. Journal of Earth System Science, 129 (1). doi:10.1007/s12040-019-1269-4 | Journal (article/letter/editorial) | | dismembered into enclaves within TTG gneisses towards the south. The contact between the TTG gneisses and the overlying...increase in metamorphic grade from north towards south in the Dharwar craton 26 Page 4 of 29 J. Earth...komatiites and basalts are largely insignificant. South of Mysore, the rocks are metamorphosed to granulite...pinchedout as a narrow belt within the gneisses in the south (figure 1b) (Swami Nath and Ramakrishnan 1981; Bhaskar...single volcano-sedimentary sequence. While the rocks south of the conglomerate horizon are predominantly metasedimentary |  | | Journal (article/letter/editorial) | | entire succession is exposed in the Tagdur mining district. The succession has been divided into the lower...chromite) from the Byrapur and the Bhaktarhalli mining district of the Nuggihalli schist belt. These are characterized...analytical data of chromite from a single mining district. Contrib Mineral Petrol (2010) 160:865–885 730...within the ultramafic body of the Jambur mining district. The chromiferous ultramafic bodies are exposed...open pit and underground workings in the Hassan district of Karnataka state. Byrapur is the largest chromite |  | Szilas, Kristoffer, Van Hinsberg, Vincent J., Kisters, Alex F.M., Hoffmann, J. Elis, Windley, Brian F., Kokfelt, Thomas F., Scherstén, Anders, Frei, Robert, Rosing, Minik T., Münker, Carsten (2013) Remnants of arc-related Mesoarchaean oceanic crust in the Tartoq Group of SW Greenland. Gondwana Research, 23 (2) 436-451 doi:10.1016/j.gr.2011.11.006 | Journal (article/letter/editorial) | | Department of Earth Sciences, University of Oxford, South Parks Road, Oxford, United Kingdom e Department...Sciences, Stellenbosch University, Matieland 7602, South Africa f Steinmann Institut für Geologie, Universität...commonly garnet and clinopyroxene bearing, with local evidence of partial melting. Conditions of their...thin section with crossed polarizers. Possible lizardite–pseudomorphs after olivine outlined by magnetite...Coarse-grained greenstone sills or dykes in the south-eastern part of the Nuuluk block. (c) Felsic schist |  | | Journal (article/letter/editorial) | | Australian Centre for Astrobiology, University of New South Wales, Kensington, NSW 2052, Australia c) GeoQuest...fluids, obscures the ratio of Eoarchean seawater. Local carbonation of the serpentinites also caused halogen...belt in Canada, the 3.2-3.4 Ga Barberton greenstone belt in South Africa, the ~3.5 Ga Pilbara craton, Western...to be recognized, an older ~3800 Ma one in the south and a ~3700 Ma one in the north, that were juxtaposed...referred to here as the Pope locality. Antigorite (± lizardite) separated from serpentinites at this locality |  | | Journal (article/letter/editorial) | | these data are: (1) formation of continental lizardite-chrysotile took place on the continent at relatively...prehnite-pumpellyite facies (Davos-Arosa) chrysotile/lizardite (chrys/liz) occurs with some relict olivine. Orthopyroxene...north. With increasing grade of metamorphism to the south, ol and opx are serpentinized. Chrys/liz predominate...3 5.3 5.1 4.3 Description. C: chrysotile; L: lizardite; A: antigorite; B: bastite; cpx: clinopyroxenc;...serpentines - 9 Antigorite /% Chrysotile / Lizardite / ". :" ~ -220 Dotted fields (Wenner 8" Taylor |  | | Journal (article/letter/editorial) | | between Mt Keith to the north and Perseverence to the south. This paper presents the results of a study undertaken...belts 330kin wide extending from Norseman in the south 820 k m north to Wiluna. As pointed out by Gemuts...narrow corridor (50 k m wide) extending north and south from Kalgoorlie. The two major exceptions to this...highest density of deposits occurs 65--100 k m south of Kalgoorlie in the Kambalda--Spargoville--Widgiemooltha...(Purvis et al., 1972). The broad greenstone belts south of Leonora converge to the north (Fig.2) and form |
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Barberton, Mbombela Local Municipality, Ehlanzeni District Municipality, Mpumalanga, South Africa