 | | Journal (article/letter/editorial) | | complexes and associated mineralisation in Namibia (Brandberg and Erongo) related to the opening of the South...Mount Weld and Gifford Creek ferrocarbonatite complex in Western Australia, the controversial Bayan Obo...events. The causes and mechanisms of rifting are complex and are beyond the scope of this contribution,...magmatic systems and carbonatites from Namibia (Brandberg, Erongo), South Africa (Kruidfontein, Goudini)...Goudini), Western Australia (Mount Weld and Gifford complex) and China (Bayan Obo and the carbonatites of the |  | | Journal (article/letter/editorial) | | Mineralization in Peralkaline Granites from the Amis Complex, Brandberg (Namibia): Evidence for Magmatic Pre-enrichment...Germany Abstract The Amis Complex is a late intrusive phase associated with the Brandberg anorogenic granite...of the Amis Complex, Namibia, which is a satellite intrusion of the Early Cretaceous Brandberg anorogenic...of postmagmatic element redistribution in the Amis Complex. Mass-balance calculations that were performed...roofward enrichment. Geology of the Amis Complex Geologic setting The Brandberg massif (Daureb in the local Damara |  | | Book | | AiAiba / farm Anibib 136 8 Grosse Spitzkoppe, Erongo 9 , .,/, loringa tree . Khomas Highland...station Garub near Aus Nature conservation, Erongo 16 Welwitschia, Goboboseb Mountains 17 ....Northwest Region including Damaraland The Central Namib Desertand Escarpment The Spitzkoppen The Erongo Mountains...The Central Escarpment- The Nauchas-Gamsberg-Hakos Area West and South of Rehoboth The Central and South-CentralDeposits...Copper Deposits The South The Pegmatitesin Central Namibia Luderitz and the Diamonds 44 49 241 254 272 275 |  | | Journal (article/letter/editorial) | | Gross Spitzkoppe and Klein Spitzkoppe stocks in Namibia: Topaz-bearing A-type granites related to continental...Geological Survey of Namibia, P.O. Box 2168, 1 Aviation Road, Windhoek, Namibia c Rosh Pinab Zinc Corporation...Corporation (Pty) Ltd, P.O. Box 115, Rosh Pinab, Namibia Received 3 February 2006; accepted 4 December...The anorogenic Damaraland intrusive complexes in Namibia belong to the bimodal Paraná–Etendeka Large Igneous...in the Gross Spitzkoppe, Klein Spitzkoppe, Erongo, Brandberg, Messum, Cape Cross, and Paresis complexes |  | | Book | | REPUBLIC OF NAMIBIA - MINISTRY OF MINES AND ENERGY GEOLOGICAL SURVEY THE MINERAL RESOURCES OF NAMIBIA FIRST...ENERGY Of the several hundred minerals present in Namibia, around sixty have been exploited. some, such as...base metals and industrial minerals have helped Namibia rank amongst the top five mining countries in Africa...terms of production and reserves. In this context, Namibia is a major producer of copper, lead, zinc, cadmium...unpublished. It is evident that mineral exploration in Namibia, as elsewhere. has changed from serendipitous discoveries |  | | Journal (article/letter/editorial) | | Simplified geological map of the Cretaceous Xiangshan complex, where the arfvedsonite granites are surrounded...LA-ICPMS. Geological background The Xiangshan complex crops out over 217 km2 in the NNEtrending Yanshan...consist of zircon, magnetite, sphere, fluorite, and rutile. The quartz is subhedral to anhedral and 1–3 mm...contrast, the biotite granite on the marginal of the complex is porphyritic-like, with 15–30 vol% phenocrysts...granite from the central part of the Xiangshan complex. The occurrence of alkali-feldspar and sodic-amphibole |  | | Journal (article/letter/editorial) | | content of the melt. Titanium-bearing oxides such as rutile and titanite are enriched in Ta and have the potential...are the Ti-bearing oxides: ilmenite, titanite, rutile or magnetite, or silicates: micas and amphiboles... 2a, b). Crystallization of Ti-bearing oxides (rutile, titanite and ilmenite) decreases Ti content and...contents and Ta/Nb produced by fractionation of rutile, ilmenite and titanite is the opposite of the trends...Bt—biotite; Ms—muscovite; Mgt—magnetite; Ilm—ilmenite; Rt—rutile; Ttn—titanite; Amph— amphibole. The fractionation |  | THOMAS, R, WEBSTER, J, RHEDE, D, SEIFERT, W, RICKERS, K, FORSTER, H, HEINRICH, W, DAVIDSON, P (2006) The transition from peraluminous to peralkaline granitic melts: Evidence from melt inclusions and accessory minerals. Lithos, 91 (1) 137-149 doi:10.1016/j.lithos.2006.03.013 | Journal (article/letter/editorial) | | interpretation of the late-stage evolution of a complex granitic system (Fig. 5). Starting from the critical...the frequently occurring Y-REE fluorite in the region. In Zinnwald, this mineralization type occurs preferentially...cassiterite (up to 4.0 wt.% Nb2O5 according to EMPA), rutile, Nb-tantalates, wolframoixiolite, Hf-rich zircon...of peralkaline granites from the BrandbergAmis Complex (Schmitt et al., 2002) demonstrate formation of...the Malkhan pegmatite field (Central Transbaikal region, Russia), re-homogenized at 700 °C and 1 kbar—re-calculated |  | Huang, He, Wang, Tao, Zhang, Zhaochong, Li, Chao, Qin, Qie (2018) Highly differentiated fluorine-rich, alkaline granitic magma linked to rare metal mineralization: A case study from the Boziguo’er rare metal granitic pluton in South Tianshan Terrane, Xinjiang, NW China. Ore Geology Reviews, 96. 146-163 doi:10.1016/j.oregeorev.2018.04.021 | Journal (article/letter/editorial) | | Tianshan Terrane (STT). The STT is considered as a complex accretionary orogenic belt, which was formed by...Autonomous Region (Fig. 1b). The major sedimentary-volcanic sequences preserved in the study area include...member, exposed in the northern segment of the study area, is dominated by low grade metamorphic rocks including... which occupies the middle segment of the study area and was intruded by the studied Boziguo’er pluton...southwestern and southeastern segments of the study area. The formation is lithologically composed of a series |  | Wang, Lize, Xu, Cheng, Zhao, Zheng, Song, Wenlei, Kynicky, Jindrich (2015) Petrological and geochemical characteristics of Zhaibei granites in Nanling region, Southeast China: Implications for REE mineralization. Ore Geology Reviews, 64. 569-582 doi:10.1016/j.oregeorev.2014.04.004 | Journal (article/letter/editorial) | | characteristics of Zhaibei granites in Nanling region, Southeast China: Implications for REE mineralization...weathering profile of granitoid rocks from Nanling region of Southeast China is an important REE resource...Note that most Jurassic granitoids in the Nanling region contain no REE minerals and cannot produce REE...crust-derived REE deposits related to granitoids in Nanling region of Southeast China are rare because few granitoids...characteristics of Zhaibei granites in Nanling region, Southeast China: Implications for REE mineralization |  | MacDonald, Ray, Bagiński, Bogusław, Kartashov, Pavel M., Zozulya, Dmitry, Dzierżanowski, Piotr (2015) Interaction Of Rare-Metal Minerals With Hydrothermal Fluids: Evidence From Quartz–Epidote Metasomatites Of The Haldzan Buragtag Massif, Mongolian Altai. The Canadian Mineralogist, 53 (6) 1015-1034 doi:10.3749/canmin.1400023 | Journal (article/letter/editorial) | | essentially a continuous sequence of events during a complex evolutionary history, a peralkaline granitic pegmatite...by titanite–rutile–cerite-(Ce)–REE-carbonate assemblages and fergusonite-(Y) by complex hingganite–cerite–thorite...Williams-Jones 2006, Gysi & Williams-Jones 2013); Amis, Namibia (Schmitt et al. 2002), Tamazeght, Morocco (Salvi...some distance from the ore zones; they form a complex of ore-free metasomatites. This study is focused...electron microprobe at the Inter-Institute Analytical Complex at the Institute of Geochemistry, Mineralogy, and |  | Xu, Cheng, Kynicky, Jindrich, Chakhmouradian, Anton R., Campbell, Ian H., Allen, Charlotte M. (2010) Trace-element modeling of the magmatic evolution of rare-earth-rich carbonatite from the Miaoya deposit, Central China. Lithos, 118 (1) 145-155 doi:10.1016/j.lithos.2010.04.003 | Journal (article/letter/editorial) | | framework and tectonic evolution of the Qinling region are given in Meng and Zhang (2000), Ratschbacher...spot; Mnz, monazite-(Ce); Ap, fluorapatite; Rt, rutile; Bt, bastnäsite-(Ce); Sy, synchysite-(Ce). Note...and Early Paleozoic carbonaceous shale, cover an area of 6.5 km2 at the current level of erosion. The...ilmenite, perovskite, zircon, ferrocolumbite, Nb-rich rutile, monazite-(Ce), bastnäsite-(Ce) and synchysite-(Ce)...with small (b1.0 mm) euhedral grains of Nb-rich rutile. Monazite-(Ce) commonly occurs as equant grains |  | Gronen, Lars Hans, Sindern, Sven, Katzmarzyk, Janet Lucja, Bormann, Udo, Hellmann, André, Wotruba, Hermann, Meyer, F. Michael (2019) Mineralogical and Chemical Characterization of Zr-REE-Nb Ores from Khalzan Buregtei (Mongolia)—Approaches to More Efficient Extraction of Rare Metals from Alkaline Granitoids. Minerals, 9 (4) 217 doi:10.3390/min9040217 | Journal (article/letter/editorial) | | alkaline rocks is in line with elevated abundances of complex and rare HFSE minerals, which have attracted both...hydrothermal processes frequently leads to narrow and complex intergrowths of fine grained and irregularly sized...the complex [5,12–15], detailed sampling work was carried out in the central part of the complex, which...geologists of the former Soviet Union [13]. The complex covers an area of 30 × 8 km and is mainly built up by...activity as well. Major faulting of the working area postdates the ore formation indicated by the displacement |  | | Journal (article/letter/editorial) | | This mineralogical diversity, in addition to the complex geological history of the pluton, provides a unique...their formation conditions are still limited. The complex geological history of this pluton provides a unique...Pluton. (b) Geological map of the Wentworth pluton area showing the geographic distribution of the studied...faults (Koukouvelas et al. 2002). The plutonic complex was compartmentalized into smaller blocks with...data, we cannot determine whether this phase is rutile, anatase, or brookite. Carbonate minerals: Hyd |  | Ryzhenko, B. N., Kovalenko, N. I., Prisyagina, N. I., Starshinova, N. P., Krupskaya, V. V. (2008) Experimental determination of zirconium speciation in hydrothermal solutions. Geochemistry International, 46 (4) 328-339 doi:10.1134/s0016702908040022 | Journal (article/letter/editorial) | | hydrolyzed in aqueous solutions to form polymers and complex ions. The sta4–n bility constants of hydroxo Zr...identified during the investigation of an alkaline rock complex as a daughter mineral in fluid inclusions trapped...the 0 possibility of formation of the Zr Cl 4 complex, whose 0 ionization constant (Zr Cl 4 = Zr4+ +...the reaction of formation – of the Zr ( OH ) 5 complex is pK° = 4.39. Similar to the above-described systems...Ryzhenko et al. [19] from the investigation of rutile solubility in supercritical fluids. Zirconium concentrations |  | Nie, Xiao, Wang, Zongqi, Chen, Lei, Yin, Jingwu, Xu, Haiming, Fan, Li, Chen, PuPu, Wang, Gang (2020) Mineralogical constraints on Nb–REE mineralization of the Zhujiayuan Nb (−REE) deposit in the North Daba Mountain, South Qinling, China. Geological Journal, 55 (6). 4845-4863 doi:10.1002/gj.3710 | Journal (article/letter/editorial) | | stages and genetic types of biotite, apatite, and rutile make it an excellent locality to constrain the...(EPMA), chemical analyses of biotite, apatite, rutile, columbite-group minerals, fersmite, monazite,...apatite (Ap-2). Rutile can also be divided into two types: magmatic (Rt-1) and hydrothermal rutile (Rt-2). Rt-1...concentrations of Nb and REE were incorporated into the rutile and apatite, respectively, during the magmatic...likely derived from the metasomatism of magmatic rutile. The REE content decreased from Ap-1 to Ap-2, possibly |  | | Journal (issue) | | island. The eontribution of Birkenmajer deseribes a region not very familiar in literature. He gives a review...ductile middle erust. Estimates of shortening based on area balaneing are again of the order of slightly more...transmission of seismic energy through the tectonically complex overlying section (Fig. 3). 239 100 km Basel...ofIvrea (crossed ruling); CRL = Cremosina line complex, bounding the Ivrea-Ceneri body (narrow horizontal...Helvetic nappes and the External Massifs is similarly complex, yet did not produce a comparable effect, and that |  | Yang, Wu-Bin, Niu, He-Cai, Shan, Qiang, Sun, Wei-Dong, Zhang, Hong, Li, Ning-Bo, Jiang, Yu-Hang, Yu, Xue-Yuan (2014) Geochemistry of magmatic and hydrothermal zircon from the highly evolved Baerzhe alkaline granite: implications for Zr–REE–Nb mineralization. Mineralium Deposita, 49 (4) 451-470 doi:10.1007/s00126-013-0504-1 | Journal (article/letter/editorial) | | 1b). The late Jurassic volcanic rocks in this region consist of andesite, andesitic tuff, and intermediate–felsic...et al. 2009). The Baerzhe pluton has an outcrop area of about 0.4 km2 and intruded the late Jurassic...reported in peralkaline granites from the Amis complex in Namibia (Schmitt et al. 2002) and from the KhadlzanBuregtey...in Mongolia, HFSE enrichment in the Tamazeght complex in Morocco, and Y enrichment in the Kipawa syenite...element levels (REE, Nb, Ta, Ti, U, Th, and F) complex in western Quebec are also considered to be related |  | Wang, Hong, Tang, Yong, Xu, Yu-Sheng, Zhang, Hui, Lv, Zheng-Hang, Qin, Shan-Xian, Song, Ying-Wei (2021) Textures and Chemical Compositions of Nb-Bearing Minerals and Nb Mineralization in the Shuangshan Nepheline Syenite Pluton, East Qinling, China. Minerals, 11 (11) 1163 doi:10.3390/min11111163 | Journal (article/letter/editorial) | | +86-851-84394846 Abstract: The Shuangshan alkaline complex located in the Henan province of China is a newly...enrichment of Nb is limited. Keywords: alkaline complex; Nb deposit; pyrochlore; zircon; alteration Massimo...and eudialyte [7,13,14]. The Shuangshan alkaline complex located in the Henan province of China is a newly...Dong and Santosh [18]. The Shuangshan alkaline complex, which comprises a series of alkaline silica- undersaturated...granite, hosts the Shuangshan Nb deposit. This complex, located in the eastern margin of the S-NCB and |  | Badanina, E.V., Veksler, I.V., Thomas, R., Syritso, L.F., Trumbull, R.B. (2004) Magmatic evolution of Li–F, rare-metal granites: a case study of melt inclusions in the Khangilay complex, Eastern Transbaikalia (Russia) Chemical Geology, 210 (1) 113-133 doi:10.1016/j.chemgeo.2004.06.006 | Journal (article/letter/editorial) | | case study of melt inclusions in the Khangilay complex, Eastern Transbaikalia (Russia) E.V. Badanina a...sequence of Li-, F-rich granites in the Khangilay complex that document the range of melt evolution from...Simplified geologic map of the Khangilay granite complex in eastern Transbaikalia, modified from Syritso...inclusions in granites from the Late Jurassic Khangilay complex in eastern Transbaikalia, Russia (Fig. 1), which...other, less specialized units of the Khangilay complex. Our sampling of quartz-hosted melt inclusions |  | Zozulya, Dmitry, Lyalina, Lyudmila, Macdonald, Ray, Bagiński, Bogusław, Savchenko, Yevgeny, Jokubauskas, Petras (2019) Britholite Group Minerals from REE-Rich Lithologies of Keivy Alkali Granite—Nepheline Syenite Complex, Kola Peninsula, NW Russia. Minerals, 9 (12) 732 doi:10.3390/min9120732 | Journal (article/letter/editorial) | | Lithologies of Keivy Alkali Granite—Nepheline Syenite Complex, Kola Peninsula, NW Russia Dmitry Zozulya 1, *...Abstract: The Keivy alkali granite-nepheline syenite complex, Kola Peninsula, NW Russia, contains numerous associated...Zr-REE-Y-Nb occurrences and deposits, formed by a complex sequence of magmatic, late-magmatic, and post-magmatic...syenites and carbonatites. In addition, in some complex rare-metal deposits related to felsic and intermediate...chemistry of the environment of formation and reflect complex isomorphic solid solutions among the britholite |  | Bagiński, Bogusław, Zozulya, Dmitry, MacDonald, Ray, Kartashov, Pavel M., Dzierżanowski, Piotr (2016) Low-temperature hydrothermal alteration of a rare-metal rich quartz–epidote metasomatite from the El'ozero deposit, Kola Peninsula, Russia. European Journal of Mineralogy, 28 (4) 789-810 doi:10.1127/ejm/2016/0028-2552 | Journal (article/letter/editorial) | | ed pr Abstract: The Keivy peralkaline granite complex, Kola Peninsula, Russia, is the only Archaean A-type...contains numerous rare-metal occurrences, formed by a complex sequence of magmatic, late magmatic and hydrothermal...were then altered by lower-temperature fluids to complex assemblages containing ferriallanite–allanite-(Ce)...report on the later metasomatic events, where a complex sequence of alteration events produced ferriallanite–allanite...ferriallanite–allanite, titanite, ilmenite and rutile, and an accessory mineral assemblage, which includes members |  | Kynicky, J., Chakhmouradian, A. R., Xu, C., Krmicek, L., Galiova, M. (2011) DISTRIBUTION AND EVOLUTION OF ZIRCONIUM MINERALIZATION IN PERALKALINE GRANITES AND ASSOCIATED PEGMATITES OF THE KHAN BOGD COMPLEX, SOUTHERN MONGOLIA. The Canadian Mineralogist, 49 (4) 947-965 doi:10.3749/canmin.49.4.947 | Journal (article/letter/editorial) | | GRANITES AND ASSOCIATED PEGMATITES OF THE KHAN BOGD COMPLEX, SOUTHERN MONGOLIA Jindrich KYNICKY§ Department...Republic Abstract The western part of the Khan Bogd complex, in the south Gobi desert, southern Mongolia, comprises...aplite–pegmatite bodies are texturally and compositionally complex products of Zr enrichment during the differentiation...Bogd (or Khan Bogdo or Khan-Bogdinskii) igneous complex, in Mongolia, one of the largest known intrusions...understood. The recent revival of interest in complex Zr–Y–REE deposits (e.g., Knox et al. 2009, Nebocat |  | | Journal (issue) | | for any number of concurrent users across a local area net\,vork. Subscription offices: USA/North America:...Pakistan; Minas Gerais in Brazil; Mozambique and Namibia in Africa; Australia; Madagascar; Italy; Ukraine;...source of some amazing gem material. --.In fact, the region was one of the world's leading sources of gem tourmaline...mentioned under topaz, and placer deposits in the area, have also produced fine orange gem spessartine...along with active smaller operations throughout the area, the end of gem mining in southern California has |  | Su, Hui-Min, Jiang, Shao-Yong, Zhu, Xin-You, Duan, Zhen-Peng, Huang, Xing-Kai, Zou, Tao (2021) Magmatic-hydrothermal processes and controls on rare-metal enrichment of the Baerzhe peralkaline granitic pluton, inner Mongolia, northeastern China. Ore Geology Reviews, 131. 103984pp. doi:10.1016/j.oregeorev.2021.103984 | Journal (article/letter/editorial) | | et al., 2014). The Baerzhe pluton has an outcrop area of about 0.4 km2 and is divided into the East body...body in some Chinese literature) with an exposed area of 1.25 km2 was later discovered (Fig. 1c). The...(fluocerite(Ce)) (Table 1). Most of these minerals show complex textural 3.3. Highly-mineralized granites The...used for standardization (Si and Na: jade, Ti: rutile, Al: garnet, Fe and Mg: olivine, Mn: rhodonite...be used to constrain the genetic type and source region. Petrographic observations including the high modal |
|
