 | Farber, Katja, Dziggel, Annika, Trumbull, Robert B., Meyer, F. Michael, Wiedenbeck, Michael (2015) Tourmaline B-isotopes as tracers of fluid sources in silicified Palaeoarchaean oceanic crust of the Mendon Formation, Barberton greenstone belt, South Africa. Chemical Geology, 417. 134-147 doi:10.1016/j.chemgeo.2015.10.009 | Journal (article/letter/editorial) | | crust of the Mendon Formation, Barberton greenstone belt, South Africa Katja Farber a,⁎, Annika Dziggel...2015 Keywords: Tourmaline SIMS Boron isotopes Barberton greenstone belt Mendon Formation a b s t r a...oceanic crust. In the Palaeoarchaean Barberton greenstone belt, South Africa, the silicified zones locally contain...tourmaline is mostly dravitic, with one sample between dravite and Mg-foitite. Tourmaline has a weakly-developed...In the Onverwacht Group of the Barberton greenstone belt in South Africa, silicification is predominant |  | | Journal (article/letter/editorial) | | mineral species (e.g. chromium-dravite, Rumyantseva, 1983 and vanadium-dravite, Reznitsky et al., 2001) were...1981) crystal-structure refinement of chromium-dravite showed that chromium can occupy both Y and Z sites...Dij = R0 0.37*ln (sij), where sij represents local valent forces for each cation in a cluster, and...group (dravite, oxy-dravite, chromo-aluminopovondraite, oxy-chromium-dravite, vanadio-oxy-dravite, van...vanadio-oxy-chromium-dravite, oxy-vanadium-dravite, bosiite and povondraite) are solid solutions which can |  | | Journal (article/letter/editorial) | | geological systems. K EY WORDS : tourmaline, Ni-rich dravite, X-ray structure refinement, cation distribution...investigated is also valid for the natural Fe2+-dravite (Ertl et al., 2012a). In view of rNi...that tourmalines with a TABLE 7. Local Ni-Al configurations (3Y), local bond valences (BV) and bond lengths...indicate that the regularities observed previously in dravite (Hawthorne et al., 1993), where Al and Mg cations...borate in the unique trevorite body in Barberton, Southern Africa (De Waal, 1986; Anhaeusser, 2012). 0 |  | | Journal (article/letter/editorial) | | representing silicification of komatiites, e.g. in the Barberton Greenstone Belt (de Wit et a! 1982). (iii) Fu...mineralization in greenstone belts of Southern Africa (Viljoen et al 1975; Pearton 1981; de Wit 1982)...chromium levels were detected in pelites from the Barberton Mountain Land (McLennan et al 1983). Fuchsite...and/or quartz in Zimbabwe, the Barberton Mountain Land, South Africa, and the Murchison, E Yilgarn, and...distinguished the rocks on a regional map of the district. REGIONAL SETTING Structure The fuchsite bearing |  | | Journal (article/letter/editorial) | | representing silicification of komatiites, e.g. in the Barberton Greenstone Belt (de Wit et al 1982). (iii) Fu...mineralization in greenstone belts of Southern Africa (Viljoen et al 1975; Pearton 1981; de Wit 1982)...chromium levels were detected in pelites from the Barberton Mountain Land (McLennan et al 1983). Fuchsite...and/or quartz in Zimbabwe, the Barberton Mountain Land, South Africa, and the Murchison, E Yilgarn, and...distinguished the rocks on a regional map of the district. REGIONAL SETTING Structure The fuchsite bearing |  | | Journal (article/letter/editorial) | | tourmalines are intermediate members of the schorl-dravite solid solution series. Plots involving FeO, MgO...(McArdle et al. 1989), and the Archaean Barberton sequence of South Africa (Byerly and Palmer 1991). Tourmaline...Basement m 4o47'E Pan-African Volcanics I Fig. 2. Local geology in the area of Bin Yauri gold-bearing veins...(1993) in Nagpur district, India, and by Slack et al. (1993) in the Broken Hill district, Australia. Whole-rock...- 5 Origin of the tourmalinites avite \--" Dravite vlte AlsoFe(tot)so Also Mgso Uddicoatite Ca |  | | Journal (article/letter/editorial) | | distribution of Cr at grain scale. Tourmaline is Na-rich dravite, with average Mg/(Mg+Fe) ratios of 0.83 and 0.63...solid solutions between endmembers uvite, schorl, dravite and elbaite) in the subsystem Ca-Fe-Mg-Li, in which...variably serpentinized dunites Barberton greenstone belt (South Africa) Byerly and Palmer (1991) Metamorphic...sequence of metapelite, quartzite and marble with local discontinuous sheets of orthogneiss in the upper...trend of J.TORRES-RUIZ ETAL. Mg Al Elbaite Dravite DM-T Uvite Schorl buergerite Al50Fe(tot)50 |  | | Journal (article/letter/editorial) | | byzantievite, chibaite, ferroericssonite, fluor-dravite, fluorocronite, litochlebite, magnesioneptunite...reported from the famous ancient Lavrion mining district in Greece. The empirical formula of agardite-(Nd)...and 63207 (Esquire 8). F.C. and G.D.G. Fluor-dravite* C.M. Clark, F.C. Hawthorne, and L. Ottolini (2011)...structure. Canadian Mineralogist, 49, 57–62. Fluor-dravite (IMA 2009-085), ideally NaMg3Al6Si6O18 (BO3)3(OH)3F...composition as recommended by Henry et al. (2011). Fluor-dravite occurs at the boundary of the pegmatite and the |  | | Journal (article/letter/editorial) | | Tourmaline mineralization in the Barberton greenstone belt, South Africa: early Archean metasomatism by...lowgrade, interior portions of the Barberton greenstone belt of South Africa, where shallow-marine sediments...the volcanic sequence of the Barberton greenstone belt in South Africa. Early twentieth century geologists...de Wit et al. 1982). Interior portions of the Barberton greenstone belt are ideally suited to test these...widespread. Stromatolites and microfossils from Barberton sedimentary rocks (Byerly etal. 1986b; Walsh and |  | | Journal (article/letter/editorial) | | tourmaline-group minerals at 3300– 3450 Ma in the Barberton belt, South Africa. The oldest boron minerals for which...the metamorphic tourmaline species schorl and dravite in the Isua complex (metamorphism between ca. 3650...Gaoyuzhuang chambersite 100 Angara suite evaporites Barberton tourmaline 3000 150 50 Phanerozoic 2500 2000...Onverwacht Group (3300–3450 Ma) of the Barberton greenstone belt in South Africa (Fig. 1; Byerly and Palmer 1991;...precursor to the two metamorphic tourmaline species dravite and schorl in the Isua complex, Greenland, which |  | Ota, Tsutomu, Aihara, Yuhei, Kiyokawa, Shoichi, Tanaka, Ryoji, Nakamura, Eizo (2019) Tourmaline in a Mesoarchean pelagic hydrothermal system: Implications for the habitat of early life. Precambrian Research, 334. 105475 doi:10.1016/j.precamres.2019.105475 | Journal (article/letter/editorial) | | tourmaline were examined. The tourmaline is schorl or dravite of the alkali tourmaline group and the boron isotope...al., 2016). In the 3.5–3.3 Ga Barberton greenstone belt, South Africa, tourmaline was found in stromatolitic...Eoarchean Isua supracrustal belt and the Paleoarchean Barberton greenstone belt. As an element, boron is a volatile...Dixon Island Formation is classified as schorl or dravite of alkali tourmaline group, on the basis of the...detected among elbaite (Al), schorl (Fe), and dravite (Mg) end-members (e.g., Chaussidon and Albarede |  | | Journal (article/letter/editorial) | | in these two major deposits all belong to the dravite – schorl series, and tend to be Mg-rich where closely...Abitibi belt of Ontario and Quebec and the Archean Barberton greenstone belt have shown tourmaline to be useful...kbar (Phillips and de Nooy, 1988; Wilkins, 1993). Local high-temperature contact metamorphism is prominent...contrast, tourmalines from the lode-Au ore zones are dravite with lower Fe/ (Fe + Mg) ratios of 0.11 –0.30,...tourmalines belong to the dravite – schorl series, and the majority are Mg-rich dravite. Three types of tourmaline |  | | Journal (article/letter/editorial) | | early-defined tourmaline species such as schorl and dravite were chemically characterized with a variety of...Al6 Si6O18 (BO3)3 (OH,F)4. By the 1960s, schorl, dravite and elbaite were the only tourmaline species (e...“grandfathered” names for the tourmaline species schorl, dravite, elbaite and uvite [redefined as fluor-uvite in...Cr-rich tourmalines were found in the Barberton district of South Africa (Hall 1918). Vanadium-bearing dravitic...of tourmaline began providing insights into the local bonding characteristics of tourmaline, particularly |  | | Journal (article/letter/editorial) | | mineralization. Tourmalines from the ore bodies are dravite with Fe=(Fe Mg) ratios of 0.09 0.31 and Ca=(Ca...from the ore bodies were probably derived from the local meta-sedimentary and meta-volcanic rocks of the...abundant and widespread throughout the Yunlong district. In general, tourmaline occurrences can be grouped...crosscut by quartz (Fig. 3A), and Mg-rich tourmaline (dravite) cut by Fe-rich tourmaline (schorl) was also observed...tourmalines from the Yunlong tin deposit belong to the dravite-schorl series (Table 1, Figs. 4 and 5). Table 1 |  | Baksheev, Ivan A., Trumbull, Robert B., Popov, Mikhail P., Erokhin, Yuri V., Kudryavtseva, Olesya E., Yapaskurt, Vasily O., Khiller, Vera V., Vovna, Galina M., Kiselev, Vladimir I. (2018) Chemical and boron isotopic composition of tourmaline from the Mariinsky emerald deposit, Central Urals, Russia. Mineralium Deposita, 53 (4) 565-583 doi:10.1007/s00126-017-0759-z | Journal (article/letter/editorial) | | Brazil (Giuliani et al. 1990); and Leydsdorp, South Africa (Grundmann and Morteani 1989). The origin of...Mines district have reported major-element compositions, but these data are published in local Russian...and still-active deposit in the Emerald Mines district. We also analyzed one sample from the inactive...Krasnoarmeisky deposit in the southern part of the district. The data set presented here combines majorelement...Regional and deposit geology The Ural emerald mining district (Ural emerald belt) is located between the Eastern |  | | Journal (article/letter/editorial) | | sense of increasing fractionation from north to south. The southern part of the pluton is enriched in...contains accessory muscovite and tourmaline as well as local tourmaline veinlets and segregations. The country... Compared with the ideal composition of shorl–dravite, many of the tourmalines from the Sinceni granite...FeqMgqMn. The vectors radiating out from ideal schorl–dravite composition represent the uvite substitution, alkali-deficiency...Si 6 O 18 ŽOH,F.4 . The composition of schorl–dravite plots near the center of the diagram at Z s 6, |  | Zegers, T. E., Barley, M. E., Groves, D. I., McNaughton, N. J., White, S. H. (2002) Oldest Gold: Deformation and Hydrothermal Alteration in the Early Archean Shear Zone-Hosted Bamboo Creek Deposit, Pilbara, Western Australia. Economic Geology, 97 (4) 757-773 doi:10.2113/gsecongeo.97.4.757 | Journal (article/letter/editorial) | | amphibolite facies deposits in the Mount York district of the Central Pilbara (Neumayr et al., 1998)...stratigraphically lower position a few kilometers to the south of Bamboo Creek and in an area to the north in the...an anastomosing foliation. The footwall to the south consists of a silicified and carbonate-altered volcano-sedimentary...which are concentrated in these boudins. To the south of the Bamboo Creek shear zone, a number of approximately...overlying units are cut by east-west– and north-south–trending faults (the Bulletin and Finucane faults |  | | Journal (article/letter/editorial) | | sulphide deposits contain tourmaline of the schorl-dravite series. Aitik-Nautanen Cu-(Au) style deposits and...some deposits with vein-style iron ore, contain dravite-schorl deficient in Al and enriched in Fe3+, which...Australia (Mount Lofty Ranges, South Australia, White, 1959; Cloncurry district, Queensland; Edwards and Baker...in Russia (Slyudanka, south Baikal region, Serdyuchenko, 1956; Aldan shield, south Yakutia, Serdyuchenko...Bjiirkliden sulphide deposits, both within the Skellefte district, and thus outside the scapolite altered area, |  | | Journal (article/letter/editorial) | | metamorphic suite of the Central Namaqua Mobile Belt (South Africa) A.P. Willner Institut ffir Mineralogie, Ruhr-Universit/it...tourmalines are Al-saturated, alkali-deficient dravite-schorl solid solutions, which are in the compositional...Bushmanland area of the Northern Cape Province (South Africa). These are part of the same supracrustal sequence...layers separated from the tourmalinites. Both the local peraluminous intercalations and their associated...Al-saturated for the given Fe/Mg, alkali-deficient dravite-schorl solid solutions covering nearly the entire |  | Hartmann, Léo A., Werle, Mariana, Michelin, Cassiana R.L., Lana, Cristiano, Queiroga, Gláucia N., Castro, Marco P., Arena, Karine R. (2019) Proto-Adamastor ocean crust (920 Ma) described in Brasiliano Orogen from coetaneous zircon and tourmaline. Geoscience Frontiers, 10 (4) 1623-1633 doi:10.1016/j.gsf.2018.09.018 | Journal (article/letter/editorial) | | composition (e.g., U/Yb < 0.1). Tourmaline is dravite with d11B ¼ þ1.8& (Tur 1), 0& (Tur 2), 8.5& (Tur...Siberia Australia India East Ant. North China South China b Ribeira Belt Conventions Ribeira and...Bossoroca Fr Sã ophiolite an o cis Amazonia co West Africa proto-Adamastor Ocean São Sepé Ophiolite Town...Tourmaline is dravite and zircon has ‘oceanic’ composition, 3 Hf(920 Ma) ¼ þ12 and HfTDM ¼ 1.0 Ga. Dravite from...arc. D3 was transcurrent faulting, whereas D4 was local thrusting. Older Rio de La Plata Craton rocks are |  | Sorokina, Elena, Rassomakhin, Mikhail, Nikandrov, Sergey, Karampelas, Stefanos, Kononkova, Nataliya, Nikolaev, Anatoliy, Anosova, Maria, Somsikova, Alina, Kostitsyn, Yuriy, Kotlyarov, Vasiliy (2019) Origin of Blue Sapphire in Newly Discovered Spinel–Chlorite–Muscovite Rocks within Meta-Ultramafites of Ilmen Mountains, South Urals of Russia: Evidence from Mineralogy, Geochemistry, Rb-Sr and Sm-Nd Isotopic Data. Minerals, 9 (1) 36 doi:10.3390/min9010036 | Journal (article/letter/editorial) | | Rocks within Meta-Ultramafites of Ilmen Mountains, South Urals of Russia: Evidence from Mineralogy, Geochemistry...alkaline complex in the Ilmen Mountains of the South Urals. More than 20 minerals were found in the assemblage...alkaline complex in the Ilmen Mountains of the South Urals, may provide clues to the unknown petrogenesis...sapphires, focusing on their genesis. For this, local geology and petrography were studied as well as...the locations of samples for this research at 3. Local geologic at ◦ ◦ 55.178434 1—meta-ultramafites; 2—ferruginated |  | Yücel-Öztürk, Yeşim, Helvacı, Cahit, Palmer, Martin R., Ersoy, E. Yalçın, Freslon, Nicolas (2015) Origin and significance of tourmalinites and tourmaline-bearing rocks of Menderes Massif, western Anatolia, Turkey. Lithos, 218. 22-36 doi:10.1016/j.lithos.2015.01.009 | Journal (article/letter/editorial) | | and west, and the Lycian Nappe sequence to the south (Şengör and Yılmaz, 1981). The Pan-African basement...pelitic metasediments from the Karahayıt region. d) Local tourmaline-rich rip-up clasts in the Karahayıt region...districts), and (3) metasediment-hosted (Labraunda district) tourmaline (Table 1). Sample localities are shown... van Hinsberg et al., 2011) has produced small local discordant quartztourmaline veins and segregations...tourmalines 3.2.1. Bozcayaka (Ödemiş) district The Bozcayaka district, which is located in the Küçük Menderes |  | | Journal (article/letter/editorial) | | (CIZ) Spain (CIZ) SW England South Africa Rwanda USA (Maine) USA (South Dakota) Sebago Granite Calamity...and Brown 2010) and the Calamity Peak granite, South Dakota (Rockhold et al. 1987), in USA; and (6) several...granitic plutons in Africa, namely, the Archean Sinceni granite from the Barberton Greenstone Belt, in... the Late Proterozoic Cape Granite Suite in South Africa (Rozendaal and Bruwer 1995), the Kuiseb Formation...with only a few analyses overlapping into the dravite field (Fig. 1a). This is confirmed on the ternary |  | | Journal (article/letter/editorial) | | Michailidis et al. 1995). For instance, a chromian dravite (8.5 wt% Cr2O3), from a calcareous rock in contact...synthesized a complete solid-solution series between dravite and “Nidravite,” and between foitite and “Ni-foitite...corundum- or diaspore-bearing, depending on the local grade of metamorphism. The karstbauxite sample is...paragonite compositions in the metabauxites and local occurrence of kaolinite. D3 structures are associated...marble component is brown and granoblastic with local crosscutting veins of coarse, colorless calcite |  | | Report (volume) | | Magnesiodumortierite Alkali-free dravite Complex tourmalines Dravite Uvite Elbaite Highly aluminous tourmalines...feldspars 374 Tourmaline stability in magmas: Dravite 376 Tourmaline stability in magmas: Quartz-tourmaline...assemblages 376 Tourmaline stability in magmas: Schorl-dravite 377 Acknowledgments 379 References 379 Chapter...Tourmaline General Broken Hill (Australia) Barberton (South Africa) Evolution of the continental crust and...Gaudefroyite from the Kalahari manganese field, South Africa. N Jahrb Mineral Mh 1993:385-392 Black PM (1971) |
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Barberton, Mbombela Local Municipality, Ehlanzeni District Municipality, Mpumalanga, South Africa