 | | Report (issue) | | 816(1) c = 7.250(2) X-ray Powder Pattern: Mautia Hill, Tanzania. 3.50 (100), 3.03 (80), 2.61 (60), 2.00...11.83 [2.69] 0.36 [99.99] [99.03] (1) Mautia Hill, Tanzania; Fe2+ :Fe3+ from MÄo ssbauer spectroscopy...18:02 (OH)1: 98 : Occurrence: A major phase in quartz-kyanite-talc schist formed under conditions of...Kyanite, talc, hematite, quartz. On Mautia Hill, Kongwa, Central Province, Tanzania. Name: For Hatten Schuyler...D.C., USA. Type Material: Geological Survey of Tanzania, JH 2563/2, JH 2563/14; National Museum of Natural |  | | Journal (article/letter/editorial) | | hydrous magnesium iron aluminosilicate from Mautia Hill, Tanganyika. (With Plate XI.) By DUNCANMcKm,...a quartz_][_ yoderite-kyanite-talc schist at Mautia Hill (6~ 889 S., 36~ 29' E.), 6 miles north-east of...former Groundnut Scheme headquarters at Kongwa, Mpwapwa District, Central Province, Tanganyika Territory...Territory. The general geology of the district has been described by Temperley (1938), who regarded (p. 40)...rocks as glaucophanekyanite-magnetite-muscovite-quartz schists and observed that ' glaucophane' always |  | Thomas, Robert J., Roberts, Nick M.W., Jacobs, Joachim, Bushi, Alphonce M., Horstwood, Matthew S.A., Mruma, Abdul (2013) Structural and geochronological constraints on the evolution of the eastern margin of the Tanzania Craton in the Mpwapwa area, central Tanzania. Precambrian Research, 224. 671-689 doi:10.1016/j.precamres.2012.11.010 | Journal (article/letter/editorial) | | the eastern margin of the Tanzania Craton in the Mpwapwa area, central Tanzania Robert J. Thomas a,∗ , Nick...Abdul Mruma d a British Geological Survey, Nicker Hill, Keyworth, Nottingham NG12 5GG, UK NERC Isotope...Bergen, Norway d Geological Survey of Tanzania, Dodoma, Tanzania b a r t i c l e i n f o Article history:...Available online 15 November 2012 Keywords: Archaean Tanzania Craton Palaeoproterozoic Usagaran Geochronology...and geochronology of the eastern margin of the Tanzania Craton near Mpwapwa yields new constraints on |  | | Journal (article/letter/editorial) | | talc+chlorite+kyanite+dravite+hematite. There is no quartz present. Recalculated microprobe analyses give...for the type locality at 2 5.7 0.3 4 18 2 Mautia Hill, Tanzania, i.e. Mg Al Fe Si O (OH) . Textural relationships...talc+kyanite+quartz ‘whiteschist’ in the Usagaran Complex, exposed in Mautia Hill, Tanzania (McKie, 1959;...Whiteschist Formation after the nearby Kadunguri Hill, grid reference ST 9619 3497). Aeromagnetic maps...There is no quartz in the rock. The surrounding whiteschists are comprised of talc+kyanite+quartz+hematite |  | | Journal (article/letter/editorial) | | first was discovered by McKie (1959) at Mautia Hill (Tanzania), while the second was discovered by Johnson...and kyanite, and commonly additionally contain quartz or coesite (Schreyer & Seifert, 1969; Schreyer...at lower temperatures it is replaced by chlorite–quartz assemblages. Subsequent experimental work by Fockenberg...green variety is Mn3+absent and found in the Mautia Hill and Chewore Hills whiteschists, with the approximate...purple variety of yoderite is restricted to Mautia Hill whiteschists, differing from green yoderite by |  | | Journal (article/letter/editorial) | | yoderite was discoveredin 1959by McKie at Mautia Hill, Tanzania, a locality within the Proterozoic Usagarancomplex...given by McKie (1959) as talc + kyanite: yoderite + quartz. Using crystallographicdata, Higgins et al. (1982)...composition of the green yoderite variety of Mautia Hill (McKie and Bradshaw, 1966). If one replacesthe...seededtwice with natural Fe-bearingyoderite from Tanzania. In this work, the amount of Fe necessaryfor nucleation...yoderite with quartz have yet to be elaborated on by further experimentation, the Tanzania yoderite schist |  | | Journal (article/letter/editorial) | | Yoderite in the Absence and in the Presence of Quartz: an Experimental Study in the System MgO-Al 2 O...enstatite, boron-free kornerupine, cordierite, quartz, and invariably an excess of hematite. Yoderite...portions of the eclogite fades. In the presence of quartz its upper pressure stability is reduced to some...yoderite + quartz which is responsible for the only yoderite occurrence in nature at Mautia Hill, Tanzania...behavior—the stability field for the assemblage yoderite+ quartz disappears for water activities lower than ~O5 |  | | Journal (article/letter/editorial) | | amphibolite from the Paleoproterozoic Usagaran Belt, Tanzania Keiko MORI*, Tatsuki TSUJIMORI*,** and Nelson...Geology, University of Dar es Salaam, Dar es Salaam, Tanzania ** We report a newly discovered assemblage of...of the Paleoproterozoic Usagaran Belt, central Tanzania. The amphibolite is characterized by the mineral...clinoamphibole, kyanite, talc with minor rutile, quartz, dolomite, and rare barite. The high Fe3+/(Fe3+...Amphibolite, High–pressure metamorphism, Usagaran Belt, Tanzania INTRODUCTION Occurrence of talc in crustal composition |  | | Journal (article/letter/editorial) | | kyanite with or without additional gedrite and quartz were discovered. The talc-kyanite and gedrite-kyanite...existence in the yoderite-bearing schist of Mautia Hill, Tanzania, had been deduced petrographically [7]....Afghanistan ages [ 11 ]. This indicates that the region was affected by several orogenetic events. The...contain variable amounts of finely crystalline quartz. (2) Tremolite-phlogopite rocks exhibiting the...portions of the kyanite-talc schist are free from quartz, some contain small amounts of this mineral enriched |  | | Report (issue) | | or Space Group: X-ray Powder Pattern: Mautia Hill, Tanzania (5H). 2.43 (vs), 1.426 (s), 2.49 (ms), 2...sapphirine, sillimanite, cordierite, kyanite, garnet, quartz, chlorite, gedrite, phlogopite. Distribution: In... Ireland. On Mautia Hill, Tanzania. At the Linganga deposit, Njombe district, Tanzania. From Tsaobis...India, at Kajlidongri and Sitapar, Chhindwara district, Madhya Pradesh; in the Nagpur and Balaghat districts...Langenberg, Saxony, Germany. From Inken, Tiovine region, Morocco. In the USA, in the Artillery Mountains |  | | Journal (article/letter/editorial) | | notice some of the salient ~\/,,"' \ ~I0- ~ s Quartz (O) / ,iI \, // TaJc/ Gordierite \ (Tc~' ~...permission o f . . . assemblages chlorite-quartz, yoderite-quartz, yoderite-cordierite, cordieritec o r u...n d u m , cordierite-sapphirine, and sapphirine-quartz are created. All these assemblages h a v e in c...pressure release, due to formation of chlorite and quartz. Thus whiteschists and greensehists having compositions...reaction relationship talc + kyanite--~ chlorite + quartz. (1) At higher temperatures the low-pressure breakdown |  | Grew, Edward S., Pertsev, Nikolai N., Vrána, Stanislav, Yates, Martin G., Shearer, Charles K., Wiedenbeck, Michael (1998) Kornerupine parageneses in whiteschists and other magnesian rocks: is kornerupine + talc a high-pressure assemblage equivalent to tourmaline + orthoamphibole?. Contributions to Mineralogy and Petrology, 131 (1) 22-38 doi:10.1007/s004100050376 | Journal (article/letter/editorial) | | six localities worldwide, but only at Chilapila Hill in the Lu®lian Arc, Zambia do textural relationships...assemblage has also been reported from Mautia Hill, Tanzania (P £ 13 kbar). In order to estimate possible...system MgO-Al2O3-SiO2-H2O (MASH) for seven phases quartz (Qtz), B-free kornerupine sensu stricto, anthophyllite...kyanite. A reaction relating the Mulvoj and Chilapila Hill (Krn + Tlc + Ky + Qtz + Tur) parageneses is calculated...metamorphic pressures estimated for Mulvoj and Chilapila Hill, Krn + Tlc is inferred to be favored by increasing |  | | Journal (article/letter/editorial) | | Based on theoretical calculations of the EXAFS region, Fe(III) appears to be located in the 5-coordinated...green grandidierite, coexisting with werdingite, quartz, corundum, hercynite, augitic diopside, and biotite...also biotite, werdingite, ilmenite, hercynite, quartz, corundum, dumortierite, and augitic diopside)...Zimbabwe samples still contained inclusions of quartz, corundum, and several other alumino-silicates... a yoderite [>99% [5]Fe(III); from Mautia Hill, Kongwa, Tanzania], an acmite (>99% [6]Fe(III); from Mont |  | | Journal (article/letter/editorial) | | fine-grained magnesium oxide, alumina and X-ray standard quartz, in the molar proportions 7MgO'9AlzO3-3SiOz, and...coll. 78123) (Harker coll. 78125) 14. Mautia Hill, Tanzania (McKie 1963) 15. Labwor Hills, Uganda (coll...gedrite, plag plagioclase feldspar, gt garnet, qz quartz, hb hornblende, ru rutile, hm hematite, si sillimanite...only; 5 (Val Codera) 2 M and 1Tc peaks; 14 (Mautia Hill) - lTc peaks only; 23 (Mt. Riiser-Larsen) - Diffuse...state in the yellow sapphirine from M a u t i a Hill, in agreement with the Mossbauer data of Bancroft |  | | Journal (article/letter/editorial) | | found in new analyses of natural yoderite from Tanzania. In some runs yoderite coexisted with kornerupine...unter derjenigen der natiirlichen Yoderite yon Mautia Hill, Tansania, liegt (dort 0.15 Mn 3+ p.F.E.). In...thus far only known from a quartz-kyanite-talc-schist at Mautia Hill, Tanzania, where it forms dark blue... Indeed a green yoderite variety, also from Mautia Hill, described by McKie and Bradshaw (1966) has Mn-oxides...Abraham (t), Bochum, on a purple yoderite from Mautia Hill, which was dedicated to the second author of |  | | Book | | GEMSTONES of East Africa Burundi, Kenya, Rwanda, Tanzania and Uganda Bruce Cairncross Published by Struik...rutile crystals partially included in transparent quartz crystals, 3 cm - Philip Hitge specimen, Bruce Cairncross...resources 12 Burundi 13 Kenya 14 Rwanda 16 Tanzania 17 Uganda 20 Gemological properties 21 A to...through Tanzania, Kenya, Ethiopia and into the Sudan - has blessed East Africa, Kenya and Tanzania, with...starting in what was then Tanganyika ( now mainland Tanzania) and then progressing to Kenya - I am proud to |  | | Journal (article/letter/editorial) | | purple (PY) and green yoderite (GY) from Mautia Hill, Tanzania, show that the bulk of the iron is Fe 3+...discovered by McKie (1959) in a quartz-kyanite-talc schist at Mautia Hill, Tanzania. This iron and manganese...variety of yoderite was described, also from Mautia Hill (McKie and Bradshaw, 1966). These are the only...the studied purple and green yoderites from Mautia Hill. For minerals containing more than one transi-...composition of purple and green yoderites from Mautia Hill, Tanzania. Columns 1 and 6 give the original analyses |  | | Journal (article/letter/editorial) | | SEPTEMBER I972, VOL. 38, PP. 837--46 Talc-kyanite-quartz schists and other high-pressure assemblages from...S U M M A R Y . Talc-kyanite-quartz schists, Mg-chlorite-kyanite-quartz schists, kyanite gedritites,...yoderite-bearing talc-kyanite-quartz schist from Mautia Hill, Tanzania (McKie, i958 ) is, as far as the...natural occurrence of this assemblage, z Talc-kyanite-quartz assemblages from the Central Province of Zambia...occurrence of talc-kyanite-quartz schist within this unit is on and around Chilapila Hill, 29 ~ 22' E., I 5 ~ |  | | Journal (article/letter/editorial) | | Namaqualand, South Africa Madras, India Vishakhapatnam District, India 7563 89789 86875 b2I 86878 b2 89790 JAS-I...orthoclase, Pgc - plagioclase, P h i = phlogopite, Q t = quartz, R t - rutile, Sa = sapphirine, S i = sillimanite...1973). Similar data for a sapphirine from Mautia Hill, Tanzania, were assembled from the works of McKie...sapphirine. It should be pointed out that the Mautia Hill sapphirine is anomalous in that all the Fe 3+...All other sappbirines are P 21/a ture. In the Mautia Hill sapphirine with all Fe 3+ assigned to tetrahedral |  | | Journal (article/letter/editorial) | | Australia d Geological Survey of Tanzania, P.O Box 903, Dodoma, Tanzania b c a r t i c l e i n f o Article...2012 Keywords: Tanzania Craton Gold endowment Tectonic framework Lake Victoria Region Undiscovered resources...resources Southern East African Orogen Central Tanzania Region a b s t r a c t The lack of new gold discoveries...in recent times has prompted suggestions that Tanzania is mature or approaching maturity, in terms of...the following three regions: 1) the Lake Victoria Region, comprising the gold-endowed East Lake Victoria |  | | Journal (article/letter/editorial) | | yoderite, a rare high pressure mineral from Mautia Hill, Tanzania (McKie 1959; McKie and Bradshaw 1966) whose...(100 + 1 0 K ) were obtained with the aid of a quartz glass low temperature cell recently developed for...hydrous magnesium iron aluminosilicate from Mautia Hill, Tanganyika. Mineral Mag 32:282-307 McKie D, |  | | Journal (issue) | | “Sugarcane Emerald” from Brazil • Orange kyanite from Tanzania • Rare optical phenomenon in play-of-color opal...Dona Dirlam wrote part of her 1992 “Gem Wealth of Tanzania” article sitting at my backyard patio table, while...gemological occurrence of pegmatitic gems in the region, as well as research. Based on his decade of experience...Dirlam et al. surveyed the colored stone wealth of Tanzania. Adolph Peretti and coauthors provided the authoritative...~300 nm and absorbed strongly in parts of the IR region (specifically the range 7000–20000 nm). The smaller |  | | Journal (article/letter/editorial) | | analcime, 245; adularia, analcime, calcite, natrolite, quartz, prehnite, stilbite, 5o9 and M49 Porthoustock,...Kondapalli, chromite, bronzite, 4o6 and M38 Seshadripuram Hill, Kondapalli, pargasite, 28o and M31 Gujarat Amba...magnetite, 463 Dhajala, Surendranagar District, meteorite, 493 Donabanda Hill, allanite, 28o and M3I Burma Mogok...5 I8 TOPOGRAPHICAL Indonesia Pomalea-Kolska district, Sulawesi, lateritic Ni ore, I43 and M4, 513 Japan...Kaduna, microcline, 443 Kenya Homa Mtn.; Kiahera Hill, Rusinga Island; Koru; and Rangwa, magnetite, carbonatite |  | | Journal (article/letter/editorial) | | dolomite marble and yoderitequartz-talc schist on Mautia Hill, Tanganyika. It has refractive indices a 1-725:j=...transformation of single crystals of partially ordered Mautia sapphirine to single crystals of a defect spinel...heat treatment. A P P H I R I N E occurs at Mautia Hill, Tanganyika, in e n s t a t i t e h o r n b l...exposed ground j u s t n o r t h of the crest of t h e hill. The sapphirinebearing rocks, which are associated...2+ and A13+. The limiting refractive indices of Mautia sapphirine, ~ 1.725J=0.002 and y 1.732=t=0.002 |  | | Journal (article/letter/editorial) | | Mozambique Belt and Unango-Marrupa Complex in SE Tanzania T Epiphania G. Mtabazia, Nelson Bonifacea, ...Geology Department, P.O. Box 35052, Dar es Salaam, Tanzania University of Oslo, Department of Geosciences...Monazite Mozambique Belt Unango-Marrupa Complex SE Tanzania We present geochronological and petrological...orthogneisses, granitoids, and supracrustal rocks from SE Tanzania to characterize the transition zone between the...orthogneisses (protolith) and granitoids in SE Tanzania occurred in Stenian, Cryogenian, and Ediacaran |
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