 | | Journal (article/letter/editorial) | | Formation tuffs of the Rukwa Rift Basin, southwestern Tanzania L. Lawrence, C. Spandler, E.M. Roberts, H.L....Formation tuffs of the Rukwa Rift Basin, southwestern Tanzania, LITHOS (2020), https://doi.org/10.1016/j.lithos...occurring ~400 km beneath Ethiopia, Kenya and Tanzania, defined as the African superswell (Nyblade, 2011)...the Usangu Basin and Tukuyu Journal Pre-proof region of the Rungwe Volcanic Province (RVP) (Fig. 1b)...vent or source of appropriate age is known in the region for the NFT, which presents a further challenge |  | | Journal (article/letter/editorial) | | state of europium produces a broad line in the blue region of the color spectrum while the trivalent state...state produces several narrow lines in the red region of the color spectrum. In the light of this knowledge...give a constant energy response for the wavelength region of 400-700 nm. This adjustment has been calibrated...in preparation). The spectrum of a synthetic fluorapatite with europium present in both the doubly and...this apatite is a blue-violet. c. Synthetic fluorapatite Ca4.s,Eu0.0s(P0,)sF0.&10.0s. The spectrum of |  | | Book (edition) | | and A. Holmes (1950) : Tanzania Geological Survey and N. J. Guest (1954) : Tanzania Geological Survey and...Tidsskrift and K. S. Heier (1961) Figure 15-9: Tanzania Geological Survey and N. J. Guest (1954) Figure...Jr., completed most of the field work on the Iron Hill complex of Gunnison County, Colorado, in 1912-1913...accepted the idea of an igneous origin for the Iron Hill carbonatite. In 1924 Bowen, who had visited the...pyrochlore-rich carbonates (e.g. in Oka, Araxa, Fen, Mbeya) has removed Nb from the category of “rare’’ elements |  | Neave, David A., Black, Martin, Riley, Teal R., Gibson, Sally A., Ferrier, Graham, Wall, Frances, Broom-Fendley, Sam (2016) On the Feasibility of Imaging Carbonatite-Hosted Rare Earth Element Deposits Using Remote Sensing. Economic Geology, 111 (3) 641-665 doi:10.2113/econgeo.111.3.641 | Journal (article/letter/editorial) | | in North America (Mountain Pass, Oka, Iron Hill, and Gem Hill), albeit in nondigital form. As reviewed...hyperspectral instruments. Examples include mapping the Iron Hill carbonatite-alkaline complex in the United States... Reflectance (%) − offset for clarity 642 Fluorapatite 49 Goethite Phlogopite 3 20 37 Bastnäsite-(Ce)...complexity of bastnäsite-(Ce), monazite-(Ce), and fluorapatite spectra that result from REE-related absorptions...Malawi, Mountain Pass in the United States, Panda Hill in Tanzania, and Sokli in Finland were sourced from |  | | Journal (article/letter/editorial) | | textures are not evident in the apatitites. The fluorapatite does not exhibit BSE-compositional zonation... James Bay (Canada); Fen (Norway); Panda Hill, Ngualla (Tanzania)]. Brazil has significant Nb reserves...St Honoré (0.41 wt.%); Oka (0.45 - 0.66 wt.%); Panda Hill 0.43 - 0.87 wt.%; Elk Creek 0.67 wt.%) (see Mitchell...apatite in these clasts has near-stoichiometric fluorapatite composition (see below). Data reduction was...those with a broad 400 - 500 nm band in the blue region of the spectrum (Verity, Howard Creek, Big Beaver |  | | Journal (article/letter/editorial) | | interrupt any smooth trend of the lanthanides in the region of its ionic radius. The errors listed in the table...as having formed directly from sea water as fluorapatite, Ca,(PO,),F, even though there are present in...similar, only La will be considered. Assuming pure fluorapatite: Ca in ppm in the phosphorite is 4 x lo5 and... 444 and LARRY HASKIN _~LLAN SCHOFIELD 7 PANDA HILL CARBONATITE 6- RARE-EARTH Fig. 4. Comparison...carbonatite 11 9 a distribntion of the Panda Hill to that of sediments. SANCU CAREiONATlTE t |  | | Journal (article/letter/editorial) | | ooCeurs in the carbonatite plug which forms Nkumbwa Hill Oat. 10 10"S. long. 32 ~ 51' E.), 15 miles east...accessory minerals are apatite (including strontian fluorapatite), isokite, pyrite, magnetite, ilmenite, baryte...recorded being Panda Hill in Tanganyika, 90 miles to the north, and Kangankunde Hill in Nyasaland, 380...Nkumbwa is much more akin to Kangankunde than to Panda Hill. Most of the specimens used in the present study...Rhodesia Geological Survey during his mapping of the hill in 1952, but additional material was obtained by |  | | Journal (article/letter/editorial) | | Ca siderite and allogenic albite, barite, and fluorapatite in the latter (Tables 2 and 3). Sr-bearing barite...according to SEM, phosphorus resides in detrital fluorapatite in the quasi-travertine and may be disseminated...of allogenic components are also different: fluorapatite and barite in the quasi-travertine (Fig. 5D...discovered in the Rukwa rift valley (Tanzania) not far from the Panda Hill carbonatite massif, in immediate... 288) 46.06 0.49 2.87 0.48 0.20 4.06 Fluorapatite 329) 36.11 0.25 2.19 1.16 – 17.03 CaO |  | | Journal (article/letter/editorial) | | and that wh/tlockite is not present in the source region. Mantle-derived mica and amphibole have such low...Some potential interferences were detected in the region of the K~ peak of F. All were of low intensity...a biotite fro~ carbonatite BD 1572 from Tundulu Hill, Malawi is given in Table 4. Its high F/CI ratio...secondary-textured micas f~l into a single elliptical region except for two associated with cfinopyroxene. ...from kimberlite (Table 2a) falll into an elongated region (Fig. 2, heavy dashed line) with F 0.5-1.1 and |  | | Journal (article/letter/editorial) | | crust; (3) to assess the nature of the mantle source region that generated the K o v d o r complex. Historical...Zimbabwe (Johnson 1966), Panda Hill (Basu and Mayila 1986) and Ngualla, Tanzania (van Straaten 1989). Apatite-rich...of the Kovdor phoscorites and carbonatites is fluorapatite (Table 2). The fluorine content increases progressively...chemical characteristics of the Panda Hill carbonatite complex, Tanzania. J Afr Earth Sci 5:589 598 334...relationships of carbonatites from Southwest and West Tanzania. In: Bell K (ed) Car- bonatites: genesis and |  | Graupner, Torsten, Klemd, Reiner, Henjes-Kunst, Friedhelm, Goldmann, Simon, Behnsen, Helge, Gerdes, Axel, Dohrmann, Reiner, Barton, Jay M., Opperman, Rehan (2018) Formation conditions and REY enrichment of the 2060 Ma phosphorus mineralization at Schiel (South Africa): geochemical and geochronological constraints. Mineralium Deposita, 53 (8) 1117-1142 doi:10.1007/s00126-018-0791-7 | Journal (article/letter/editorial) | | source. Fluorapatite, early allanite and titanite are the main REY carriers at Schiel. Fluorapatite dominates...F concentration that can occur in endmember fluorapatite (Webster and Piccoli 2015) depletion compared...RS104 #pts Summary of EPMA results of selected fluorapatite, allanite, titanite and chevkinite analyses...references therein) concerning a dominance of the fluorapatite component in most magmatic rocks including carbonatites...Eu anomalies ranging between 0.7 and 0.8 for fluorapatite in phoscorite, banded carbonatite and transgressive |  | | Journal (article/letter/editorial) | | Cax)2–x(CO3)], known from Ol Doinyo Lengai volcano (Tanzania). A refinement to the IUGS chemical classification...natrocarbonatitic lavas from Ol Doinyo Lengai, Tanzania that contain 38–40 wt.% combined Na2O and K2O...Roberts 1984; Zaitsev et al. 2013); Kerimasi, Tanzania (Hay 1983; Zaitsev 2010; Guzmics et al. 2011);... 2010) to very recent (e.g. Ol Doinyo Lengai, Tanzania, which is considered an active volcano). Frequency...carbonatite provinces: (a) East Africa (Kenya, Uganda, Tanzania, and one occurrence in Zambia); (b) Namibia and |  | Rampilova, Maria, Doroshkevich, Anna, Viladkar, Shrinivas, Zubakova, Elizaveta (2021) Mineralogy of Dolomite Carbonatites of Sevathur Complex, Tamil Nadu, India. Minerals, 11 (4) 355 doi:10.3390/min11040355 | Journal (article/letter/editorial) | | Minor minerals in dolomite carbonatite are fluorapatite, phlogopite (with a kinoshitalite component)...carbonatite occurrences were reported from this region, all of which are located along the same NE-trending...microcracks 3SE/7 1.25 64.83 0.67 33.35 100.10 Fluorapatite (Ca prismatic in dolomite (Figure b.d.—below...pyrochlore (Figure 9) in fluorapatite. is enriched in strontium (Table 3). Fluorapatite (Ca 5(PO 4)3F)Itforms...phlogopite and pyrochlore (Figureand 9) dolomite, in fluorapatite. It isburbankite (Figure 6e). It also forms |  | | Report (issue) | | Known phosphogenic provinces of the Caribbean region, Neogene marine phosphorites.....................phosphate rock in the Caribbean and Central American region were examined at a workshop held at East Carolina...occurrences of phosphate rock in the Caribbean region are presented, and the origins of those deposits...OF THE CARIBBEAN REGION Three phosphogenic provinces are known in the Caribbean region: 1) Neogene marine...Indonesia, Philippines and New Zealand. Caribbean region occurrences Phosphorite of Miocene and lower Pliocene |  | | Journal (article/letter/editorial) | | (Ba), corundum (Al), manganoan fayalite (Mn), fluorapatite (P), ilmenite (Fe and Ti), jadeite (Na), loparite-(Ce)...chemical characteristics of the Panda Hill carbonatite complex, Tanzania. J. Afr. Earth Sci. 5, 589-598...from the carbonatite volcano, Oldoinyo Lengai, Tanzania. J. Petrol. 36, 797-826. DELLA VENTURA, G., BELLATRECCIA...white trachytic tuff of Roccamonfina Volcano (Rome Region, Italy). Contrib. Mineral. Petrol. 84, 235-252...Platform carbonatite deposit (Kursk Magnetic Anomaly region). Geochem. Int. 25(5), 24-34. OBERTI, R., UNGARETTI |  | | Book (edition) | | with both enclosed in square brackets, e.g. fluorapatite Ca[Fl(PO 4)3] or euchroite 0.1 2[OHIAsO 4]•3H...abbreviated, e.g. canton (Switzerland), vilayet (Turkey), region (Chile), kray and oblast (Russia). The country...by Mobutu, and is now the Katanga administrative region again. The former Kivu province is now divided...United States or of the Upper Silesian historical region in Poland, where the importance of ore-bearing...Rare-with scorodite in U-bearing lignite in the Caves Hill and Slim Buttes areas, both Harding Co .. South |  | | Journal (article/letter/editorial) | | occurred due to the site’s location in the sub-Arctic region [30]. These “preserved” sites help to identify...carbonatite complex, southwest of the Murmansk region, Northwest Russia. The Vuoriyarvi is one of the...fluorine. This is indicated by the presence of fluorapatite, fluorcalciopyrochlore and F-rich phlogopite...pyrochlore from the Mesozoic Panda Hill carbonatite deposit, western Tanzania. J. Afr. Earth Sci. 2017, |  | Çimen, Okay, Kuebler, Corinne, Simonetti, Stefanie S., Corcoran, Loretta, Mitchell, Roger, Simonetti, Antonio (2019) Combined boron, radiogenic (Nd, Pb, Sr), stable (C, O) isotopic and geochemical investigations of carbonatites from the Blue River Region, British Columbia (Canada): Implications for mantle sources and recycling of crustal carbon. Chemical Geology, 529. 119240 doi:10.1016/j.chemgeo.2019.07.015 | Journal (article/letter/editorial) | | investigations of carbonatites from the Blue River Region, British Columbia (Canada): Implications for mantle...investigations of carbonatites from the Blue River Region, British Columbia (Canada): Implications for mantle...Investigations of Carbonatites From the Blue River Region, British Columbia (Canada): Implications for Mantle...and Howard Creek carbonatites from the Blue River Region, British Columbia (Canada). These sill-like occurrences...recycled crustal carbon in their mantle source region, which is consistent with those for young (<300 |  | | Book | | localities for good ilmenite crystals exist in the region (Brunet, I 977b ). NEW YORK Amity, Orange County...magnetite, anatase, biotite, microcline and minor fluorapatite (Robinson and Chamberlain, 1982), with ilmenite...during the 1970s (see this entry for Actinolite, Fluorapatite, Prehnite, Pumpellyite). Ilmenite was found...in Switzerland, it is only in the Maderanertal region of east-central Canton Uri that clefts bearing...clefts are found fairly commonly throughout this region, such that only a handful of notable finds during |  | | Book | | in California, USA (Colorado Quartz mine. Nigger Hill and others). Fine leaf gold comes from Rosia Montana...aggregates of fine gold wires come from Famcomb Hill near Breckcnridge, Colorado, USA. Fine crystals...to 15 mm ("/» in) come from Konder in Khabarovsk Region, small crystals, but mainly nuggets, weighing up...Greenland. Crystals were also found in Sterling Hill, New Jersey and Crestmore, California. USA Foliated...aggregates are found in Sri Lanka (Radegara, Galle region). Accumulations in Buckingham and Grenvillc, Quebec |  | Mikhailova, Julia, Ivanyuk, Gregory, Kalashnikov, Andrey, Pakhomovsky, Yakov, Bazai, Ayya, Panikorovskii, Taras, Yakovenchuk, Victor, Konopleva, Nataly, Goryainov, Pavel (2018) Three-D Mineralogical Mapping of the Kovdor Phoscorite–Carbonatite Complex, NW Russia: I. Forsterite. Minerals, 8 (6) 260 doi:10.3390/min8060260 | Journal (article/letter/editorial) | | (Araxá, Catalăo, Fen, Lueshe, Mt. Weld, Oka, Panda Hill, St. Honoré, Tomtor, etc.), Cu (Palabora), Fe...phoscorite–carbonatite complex in the Murmansk Region (Russia) has large resources of Fe (as magnetite)...carbonatites is situated in the SW of Murmansk Region, Russia (Figure 1a). It is a central-type intrusive...in АF-phoscorite 937/114.6 (a) and the enlarged region relict grain of “peridotitic” forsterite-I (Fo’...forsterite (b). Fo’’’ = Fo95Fa5. Other mineral region demonstrating diopside lamellae and calcite “drops” |  | | Book | | grey in reflected light. Alekseev mine, Sutamskii region, Stanovoi Range, USSR. H= 2.3, Djjj=?, D(;=7.80...Mn5(Si04)2(0H)2, E Mon. Translucent bright/greyish pink. Bold Hill, Alleghany Co., North Carolina, USA. H= 5.5, Djj4=4...Repts. 38A (1972), 308. See also Chlorapatite, Fluorapatite, Hydroxylapatite. Apatite, Aphthitalite, ...medium grey in reflected light. Aurora mine. Treasure Hill, Hamilton, Nevada, USA. H= < 3, Djjj=?, D(,= 3.88...Cub. Translucent yellowish-grey. Panda Hill, Mbeya (near), Tanzania. H= 4.5-5, Djj3=4.1, D{.= 4.01, IVC |  | | Book | | aggregates of fine gold wires come from Farncomb Hill near Breckenridge, Colorado, USA. Fine crystals...in California, USA (Colorado Quartz mine, Nigger Hill and others). Fine leaf gold comes from Rosia Montana...15 mm (1 9h2 in) come from Konder in Khabarovsk Region, small crystals, but mainly nuggets, weighing up...Crystals of metamorphic origin come from Sterling Hill, New Jersey, USA. Properties: C - tin-white to...Greenland. Crystals were also found in Sterling Hill, New Jersey and Crestmore, California, USA Foliated |  | | Book | | Mineralogy University of ~1ichigan .. 1958 McGRAW-HILL BOOK COMPANY, INC. NEvV YORK TORONTO LONDON ~...RADIOACTIVE RAW MATERIALS Copyright © 1958 by the McGraw-Hill Book Con1pany, Inc. Printed in the United States...and some zircon (var. cyrtolite). In the Baringer Hill, Texas, pegmatite, Landes ( 1932) noted fissures...10 ); Kaiserstuhl, Baden, Germany; Alno, Sweden; Mbeya, Tanganyika, and others in Africa; Chilwa Island...the Spruce Pine district; in Texas in the Baringer Hill pegmatite ( 'vvhich is at the bottom of a reservoir) |  | | Report (issue) | | BRITAIN AND NORTHERN IRELAND UNITED REPUBLIC OF TANZANIA UNITED STATES OF AMERICA URUGUAY UZBEKISTAN VANUATU..................................... 55 6.5.20. Tanzania, United Republic of ............................indirect evidence. Existence expected in a geological region or trend. Resources in situ. For details of the... This chapter describes individual deposits by region. 6.1. EUROPE Deposits of thorium in Europe are...acidic and alkaline volcanics, mainly in the Latium region, are known to have elevated contents of thorium |
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