 | Smit, C.A., Van Reenen, D.D., McCourt, S., Huizenga, J.M., Belyanin, G., Vafeas, N.A. (2019) Hypozonal orogenic gold mineralization in the Giyani Goldfield, Northern Kaapvaal Craton/Limpopo Complex. South African Journal of Geology, 122 (4) 455-488 doi:10.25131/sajg.122.0037 | Journal (article/letter/editorial) | | gold mineralization in the Giyani Goldfield, Northern Kaapvaal Craton/ Limpopo Complex C.A. Smit and D.D...Johannesburg, PO Box 524, Auckland Park, 2006, South Africa email: christofasmit@gmail.com; dirkvr@uj.ac...Sciences, University of KwaZulu Natal, Durban, South Africa email: mccourts@ukzn.ac.za J.M. Huizenga Economic...Johannesburg, P.O. Box 524, Auckland Park, 2006, South Africa email: jan.huizenga@jcu.edu.au G. Belyanin Department...Johannesburg, P.O. Box 524, Auckland Park, 2006, South Africa Email: gbelyanin@uj.ac.za N.A. Vafeas Department |  | | Book | | Archaean Geology of the Kaapvaal Craton, Southern Africa Regional Geology Reviews Series editors Roland... Nelson Mandela University, Port Elizabeth, South Africa François M. Roure, Rueil-Malmaison, France ...Archaean Geology of the Kaapvaal Craton, Southern Africa 123 Editors Alfred Kröner Institut für Geowissenschaften...Geology University of Johannesburg Auckland Park, South Africa ISSN 2364-6438 ISSN 2364-6446 (electronic)...continued interest. The Kaapvaal Craton of Southern Africa is featuring prominently in early Earth studies |  | Brenner, T. L., Teixeira, N. A., Oliveira, J. A. L., Franke, N. D., Thompson, J. F. H. (1990) The O'Toole nickel deposit, Morro do Ferro greenstone belt, Brazil. Economic Geology, 85 (5) 904-920 doi:10.2113/gsecongeo.85.5.904 | Journal (article/letter/editorial) | | BRENNER,*N. A. TEIXEIRA,J. A. L. OLIVEIRA,N. D. FRANKE,AND J. F. H. THOMPSON BP MineraqtioLtda., Bio de...major ArchcanParamirimcratonin the central The local geologyhas been describedbriefly by part of Brazil...percent Ni the stratigraphyof the Morro do Ferro greenstone Morerecently,Carvalhoet al. (1989-), cutoff are...are estimated at 6.6 million metric tons of ore belt sequence. Morales et al. (1983), and Choudhuriet...andtectonicsetting zone between the craton and mobile belt is highly andformthe basisfor understanding the |  | | Journal (article/letter/editorial) | | Archean komatiitic rocks of the Morro do Ferro greenstone belt, near the southwestern margin of the São Francisco...Ni–Cu–(PGE) deposits occur mainly in Archean greenstone belts in Western Australia (e.g., Kambalda),...magmatic belts in Canada (e.g., Thompson Nickel Belt) and Russia (e.g., Pechenga) (Lesher & Keays 2002...references therein). Those deposits hosted in Archean greenstone belts represent the most important examples of...Donaldson (1984), Lesher & Keays (1984); Thompson mine: Chen et al. (1993), and Fortaleza de Minas: Brenner |  | 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) | | Osso Komatiite Flow Field, Rio das Velhas Greenstone Belt, Quadrilátero Ferrífero (Brazil) Raianny Carolini...Osso Komatiite Flow Field, Rio das Velhas Greenstone Belt, Quadrilátero Ferrífero (Brazil), LITHOS (2020)...Osso Komatiite Flow Field, Rio das Velhas Greenstone Belt, Quadrilátero Ferrífero (Brazil) Raianny Carolini...Field is part of the 2.9-2.7 Ga Rio das Velhas greenstone belt, in the Quadrilátero Ferrífero province, located...environment. The abundance of autobreccias and local hybrid rocks point out to turbulent percolation |  | | Journal (article/letter/editorial) | | and cherts). Mobilization conducive to this paired belt of metasomatites involved silica mobilized from...(Malkovsky, 1979; Weber and Behr, 1983, Stettner, 1992; Franke et al., 1995). The Late Variscan granitic rocks...denominated in the field either as a schist or as tremolite, grossular or diopside fels depending upon the...Göpfersgrün and W of Pleystein, near Gsteinach, in a local vesuvianite skarn of lithotype 1 and a garnet-diopside-vesuvianite...lithotype 3. Their Na/ K ratio is significantly greater than 1 and similar to lithotype 2 (Fig. 9c, e) |  | | Journal (article/letter/editorial) | | (cm-scale) reaction rim comprising an inner, tremolite + phlogopite zone and an outer, essentially monomineralic...EY WORDS : peridotite enclaves, metasomatism, tremolite, phlogopite, trace elements, Czech Republic. ...~6 to 10 cm thick. This rim comprises an inner tremolite+phlogopite-rich zone and an outer, essentially...Massif forms an eastern part of the Variscan orogenic belt running across the western and central Europe. The...facies and assembled during the Variscan Orogeny (Franke, 1989; Matte et al., 1990). The zone was also intruded |  | | Report (chapter) | | of varied affinities (Kossmat 1927; Matte 1986; Franke 1989, 2000). It includes the southern margin of...1997; Cocks 2000). Tectonic units now occurring south of the Rheno-Hercynian Zone experienced a separate...'Old-Red Continent', Laurussia (e.g. Pharaoh 1999; Franke 2000; Marheine et al. 2002). Ocean sutures mark...MidGerman Crystalline High to the south (Cocks & Fortey 1982; Franke & Engel 1986). Closure of early Palaeozoic...and associated Tepl~-Barrandian Unit (Matte 1986; Franke 1989, 1995; Matte et al. 1990). With the exception |  | | Journal (article/letter/editorial) | | and fluorite are widespread in the country rocks south of the collisional calcalkaline felsic to intermediate...complex of the Central European Variscides (Franke, 1995; Franke et al., 1995). The oldest lithologies and...Sb-Au veins in the Brandholz-Goldkronach Mining District prevalently are oriented N-S, NNE-SSW, NE-SW and...at the expense of calcsilicate minerals, e.g., tremolite. The sedimentary nature of these horizons is underscored...alteration (Table 1). Ca-Mg-Fe-Be silicates: Tremolite is the most common Ca-Mg-Fe silicate in the marginal |  | | Report (issue) | | 357 deposits, including deposit name, country, local geographical area, mineralogy, gold and silver grades...deposit. Table 4, part B, gives an alphabetic list of mine and properties followed by the deposit name. CHARACTERISTICS...Au-quartz vein deposits are commonly found in greenstone belts. Rock types hosting deposits include greywacke...used in Table 1 may represent a major mine, district name, or local town name or other prominent feature...appears to be been reported in just a single mine in the East Belt of the Sierra Nevada foothills (Knopf, 1929) |  | Rötzler, Jochen, Romer, Rolf L., Budzinski, Hubertus, Oberhänsli, Roland (2004) Ultrahigh-temperature high-pressure granulites from Tirschheim, Saxon Granulite Massif, Germany: P-T-t path and geotectonic implications. European Journal of Mineralogy, 16 (6) 917-937 doi:10.1127/0935-1221/2004/0016-0917 | Journal (article/letter/editorial) | | pressure of about 23 kbar. Diffusion zoning and local homogenisation of minerals reflect near-isothermal...these granulites. The central European Variscan Belt was assembled in an Upper Devonian convergent setting...southward subduction of the intervening oceanic basins (Franke, 2000). The Saxo-Thuringian plate, the middle of...with respect to the active subduction zones to the south and the north. The subduction of the granulite protoliths...these granulites with continuing marine deposition, Franke & Stein (2000) proposed lowercrustal flow as a |  | | Report (issue) | | location of Calaveras County Map of the Angels Camp district showing geology and lode mines Sketch map of the...._ West Point-Railroad Flat-Glencoe of the district, — of the Carson Hill Figure 7. Cross section...of the Figure 9. Cross section of Royal gold mine Map Figure 11. 38 46 area Figure Figure 10...mines map 10 34 48 Hill 48 Hill Gwin gold mine 58 68 of portions of the workings of the Gold...Central drift of Calaveras County showing map and mine 85 ... 94 plant... 99 distribution of limestone |  | | Book | | France and Related Areas (1994) R.D. DALLMEYER, W. FRANKE, and K. WEBER {Eds.}: Pre-Permian Geology of Central...Central and Eastern Europe (1995) R.D. Dallmeyer W. Franke K. Weber (Eds.) Pre-Permian Geology of Central...University of Georgia Athens, Georgia 30602-2501 USA W. FRANKE Justus-Liebig-Universität Senckenbergstrasse 3... DALLMEYER W. FRANKE K. WEBER Contents I Introduction R.D. DALLMEYER, W. FRANKE, and K. WEBER...Rhenohercynian Foldbelt III.A Introduction W. FRANKE . . . . . . . . . . . . . . . . . . . . . . . |  | | Journal (issue) | | research into the geology and geomorphology of South West England and the surrounding marine areas; to...to hold Annual Conferences at various places in South West England where those engaged in this research...visit to the city (or the eighth if we include the 'South Western Conferences' and their historic inaugural...shown important exposures in ECC's Greystone Quarry south-east of Launceston, on Brent Tor and in the stream...set against a broader background by Dr Wolfgang Franke of the Geological and Palaeontological Institute |  | | Journal (article/letter/editorial) | | Ferry 1991, 1994). These rocks usually recorded local equilibrium and often show large differences in...part of this unit is exposed in a NW–SE oriented belt (Fig. 1). Generally, the PU is in contact with the...metamorphic grade from the granulite-facies in the south of the lower subunit to the amphibolite-facies recorded...Amphibolites with MORB-like geochemistry form a narrow belt along the boundary of the lower and middle subunits...subunits of the PU (Melichar and Hanžl 1997). A second belt of amphibolites rims the contact of the PU with |  | | Journal (article/letter/editorial) | | Ni-Cu Sulfide Deposits from the Morro do Ferro Greenstone Belt, Southeastern Brazil A. Choudhuri , S. S. Iyer...Ni-Cu Sulfide Deposits from the Morro do Ferro Greenstone Belt, Southeastern Brazil, International Geology...Ni-Cu Sulfide Deposits from the Morro do Ferro Greenstone Belt, Southeastern Brazil1 A. CHOUDHURI, Instituto...June 2016 Abstract In the Morro do Ferro greenstone belt in southeastern Brazil, Ni-Cu massive sulfides...than values for similar occurrences in other greenstone belts. As there does not seem to be evidence |  | Lord, R. A., Prichard, H. M., S.SA, J. H., Neary, C. R. (2004) Chromite Geochemistry and PGE Fractionation in the Campo Formoso Complex and Ipueira-Medrado Sill, Bahia State, Brazil. Economic Geology, 99 (2) 339-363 doi:10.2113/gsecongeo.99.2.339 | Journal (article/letter/editorial) | | Ipueira-Medrado mines, representative of the Jacurici Valley district, a folded segment of a 200- to 250-m-thick ultramafic-mafic...orthopyroxene relicts in an upper unit at the Cascabulhos mine. Microprobe studies of chromite-rich specimens from...craton Jacurici Valley Granulite (Salvador-Curaça belt) Campo Formoso Complex, Jacurici Valley and Caraíba...IpueiraMedrado Senhor do Bonfim Cascabulhos Thrust Fault Mine 0 Km 10 20 40° W Town FIG. 1. Geologic map...They were originally thought to be either a “greenstone belt-like” sequence (Mascarenhas and Sá, 1982, p |  | | Conference Proceedings (Volume) | | Cover photograph: View of the Aitik open pit copper mine in the very north of Sweden. Mining operations started...for interpretive bedrock mapping in the Giyani area (South Africa) .. ...................................mineral potential map of the Neoproterozoic Gariep Belt in Namibia .......................... 480 . ...area of the Kristineberg VHMS deposit, Skellefte district, Sweden .......................................A. Massive Zn-Cu-Pb deposits in the Røros ore district, Norway: setting and formation ............. |  | | Report (chapter) | | grading from serpentinites and gabbros in the south to metabasite lavas in the north. The recent discovery...e o p r o terozoic and mid-Carboniferous times (Franke 1989a; F r a n k e et al. 1995). Major episodes...basement remnants were metamorphosed and deformed (Franke 1989b). In tectonic terms this region of the Variscides...fragments) and Baltica during the Palaeozoic (e.g. Franke 1989a; Matte et al. 1990; Oliver et al. 1993; Cymerman...Cymerman & Piasecki 1994; Cymerman et al. 1997; Franke & Zela~niewicz 2000). During progressive rifting |  | | Book | | Germany Maarten J. de Wit, Port Elizabeth, South Africa François M. Roure, Rueil-Malmaison, France ...sediments of the Ediacaran Rocha Formation (Dom Felicano Belt) at the Atlantic coast of Uruguay. These metasediments...Oranjemund Group (Gariep Belt) cropping out in the western borders of Namibia and South Africa. They were split...split up in the Mesozoic during the south Atlantic Ocean opening”. Photo by Mathias Hueck Printed on acid-free...Ortelius was the first to recognize the match of the South American and African Atlantic margins (Ortelius |  | | Journal (article/letter/editorial) | | elsevier.com/locate/pgeola The Gramscatho Basin, south Cornwall, UK: Devonian active margin successions...Deep marine deposits of the Gramscatho Basin of south Cornwall reflect two tectonic regimes; Early to Middle...lithosphere with formation of oceanic lithosphere to the south, and Middle Devonian to earliest Carboniferous convergence...crust to the north and oceanic lithosphere to the south were juxtaposed in the Late Devonian when nappes...continental lithosphere and the development of the South-West England passive margin, together with associated |  | Kubínová, Šárka, Faryad, Shah Wali, Verner, Kryštof, Schmitz, Mark, Holub, František (2017) Ultrapotassic dykes in the Moldanubian Zone and their significance for understanding of the post-collisional mantle dynamics during Variscan orogeny in the Bohemian Massif. Lithos, 272. 205-221 doi:10.1016/j.lithos.2016.12.007 | Journal (article/letter/editorial) | | that occurred along the European Variscan orogenic belt (Fig. 1a, Abdelfadil et al., 2014; Couzinié et al...country rocks are sharp, dipping steeply to the south. The syenite porphyry has discordant intrusive contacts...zone is formed by biotite, but small amounts of tremolite can also be present. As no relic of precursor...and Si = 7.8–7.9 apfu. The second variety is tremolite and forms small needles in the calcite. AC ...pseudomorphs (0.5 mm in size) are formed by amphibole of tremolite composition (XMg 0.90–1.00). NU 4.2.2. Biotite |  | | Journal (article/letter/editorial) | | ultramafic rocks in the Moldanubian zone of the Variscan belt in Europe. GEOLOGICAL SETTING The Moldanubian zone...Drosendorf metamorphic units (Dallmeyer et al., 1995; Franke, 2000), which were intruded by Variscan mafic to...Drosendorf unit (Tollmann, 1982; Behr et al., 1984; Franke, 2000), even though alternative views do exist...terrane is used for amphibolite facies rocks in the south-western sector of the Moldanubian zone (Fuchs &...Cr2O3), Ti (2.8 wt% TiO2) and XMg = 0.8 except for tremolite which cross-cuts the rock as thin veins. 2 CaMgSi2 |  | | Journal (article/letter/editorial) | | metadolerite, fine-grained metabasite greenschist greenstone, (pillow lavas) felsic tuff sericite-chlorite...southwesternmost continuation of the metabasite belt during excavation for the construction of a waste...et al. 1997; Żelaźniewicz 1997; Franke 1989; Franke et al. 1993; Franke and Żelaźniewicz 2000; Mazur et...the Saxothuringian Zone of the Variscan orogen (Franke et al. 1993). West Sudetes are composed of Late...probably Cambrian to Devonian age (Fig. 1). In the south and southeast, this unit is overthrust by volcano-sedimentary |  | Kryza, R., Willner, A. P., Massonne, H.-J., Muszyński, A., Schertl, H.-P. (2011) Blueschist-facies metamorphism in the Kaczawa Mountains (Sudetes, SW Poland) of the Central-European Variscides: P-T constraints from a jadeite-bearing metatrachyte. Mineralogical Magazine, 75 (1) 241-263 doi:10.1180/minmag.2011.075.1.241 | Journal (article/letter/editorial) | | limited distribution within the European Variscan belt, more recent papers document blueschist-facies rocks...orogen (e.g. Behr et al., 1984; Matte et al., 1990; Franke and Żelaźniewicz, 2000; Mazur and Kryza, 1995;...of the blueschist localities within the Variscan belt, the HP metamorphic minerals have been replaced...been correlated with the Saxothuringian Zone (e.g. Franke and Żelaźniewicz, 2000), but some authors consider...location of the Kaczawa Mts within the Variscan belt (a) and Bohemian Massif (b); EFZ Elbe Fault Zone |
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