 | | Journal (article/letter/editorial) | | talc, staurolite, pyrope, enstatite, boron-free kornerupine, cordierite, quartz, and invariably an excess...the only yoderite occurrence in nature at Mautia Hill, Tanzania. Preliminary thermodynamic calculations...environment of this kind, yoderite formation in the Mautia Hill whiteschist may have occurred even at constant...McKie (1959) in a 5 m thick schist band at Mautia Hill (Tanzania). This locality within the Proterozoic Usagaran...which it is topotactically intergrown in the Mautia Hill rock. Chains of edgesharing octahedra A(l) run |  | | Journal (article/letter/editorial) | | 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...‘whiteschist’ in the Usagaran Complex, exposed in Mautia Hill, Tanzania (McKie, 1959; Mruma & Basu, 1987). Nd model...Whiteschist Formation after the nearby Kadunguri Hill, grid reference ST 9619 3497). Aeromagnetic maps...blocks situated within the outlined ellipsoidal region. Position X marks a small exposure where the boundary...Chewore green yoderite, the optical properties of Mautia Hill green yoderite are very similar, e.g. a/b sections |  | 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) | | Wiedenbeck Kornerupine parageneses in whiteschists and other magnesian rocks: is kornerupine + talc a high-pressure...April 1997 / Accepted: 13 October 1997 Abstract Kornerupine, (h,Fe,Mg)(Mg,Fe,Al)9(Si,Al,B)5 (O,OH,F)22, has...Chilapila Hill in the Lu®lian Arc, Zambia do textural relationships imply that kornerupine (Krn) equilibrated...assemblage has also been reported from Mautia Hill, Tanzania (P £ 13 kbar). In order to estimate possible...possible constraints on the stability range for the kornerupine + talc paragenesis in nature, we constructed |  | | Journal (article/letter/editorial) | | Properties of Mn-Bearing Yoderite and of Mn-Bearing Kornerupine as By-Product T. Fockenberg and W. Schreyer Research-Group...natural yoderite from Tanzania. In some runs yoderite coexisted with kornerupine containing Mn and Fe...Relative to yoderite Mn is fractionated into kornerupine. The analytical data suggest that most of the...unter derjenigen der natiirlichen Yoderite yon Mautia Hill, Tansania, liegt (dort 0.15 Mn 3+ p.F.E.). In...known from a quartz-kyanite-talc-schist at Mautia Hill, Tanzania, where it forms dark blue porphyroblasts |  | | Report (issue) | | (Mg, Fe2+, Al, ☐)10(Si, Al, B)5O21(OH, F) Kornerupine Crystal Data: Orthorhombic. Point Group: 2/m...= 6.715(2) Z=4 X-ray Powder Pattern: Mautia Hill, Tanzania. 2.639 (100), 3.03 (80), 3.37 (60), 2.118...In Germany, from Waldheim, Saxony. From Mautia Hill, Tanzania. On the Bok se Puts Farm, Namaqualand, Cape...(1965) The magnesium aluminium borosilicates: kornerupine and grandidierite. Mineral. Mag., 34, 346-357...K. Herd, and N. Marquez (1987) Boron-bearing kornerupine from Fiskenæsset, West Greenland: a re-examination |  | | Journal (article/letter/editorial) | | Mineralogist, Volume 74, pages642455, 1989 Kornerupine: Chemical crystallography,comparativecrystallography...6521I, U.S.A. Ansrru.cr Kornerupinefrom Mautia Hill, Tanzania,orthorhombicholosymmetic, a: 16.041(3),...anion loci are structurally possible. Thus, kornerupine and sinhalite (olivine), which occur in similar...atomic-absorption many experimentsthat fall in this region, and when they coefficient,p, the anisotropic thermal-vibration...642 643 MOORE ET AL.: CRYSTAL CHEMISTRY OF KORNERUPINE mon phenomena,and such structure solutions usually |  | | Journal (article/letter/editorial) | | amountsof B through trl$ = I4lSisubstitution in kornerupine Ror,r KLASxA.* Eowlno S. GnBw** Institut fiir...67(OH) predicted by P. B. Moore and colleaguesfor kornerupine with 330/ooccupancy of the eightfold X site....bound to two protons. Comparison with three kornerupine sampleshaving B contents of 0.410.69 B atoms...and Si for Al in T2, and it implies that T3 in kornerupine with low B contents (possibly 0-0.5 atoms) contains...We suggestthat the following factors enable kornerupine to incorporate variable amounts of B: (l) flexibility |  | | Journal (article/letter/editorial) | | coll. 78123) (Harker coll. 78125) 14. Mautia Hill, Tanzania (McKie 1963) 15. Labwor Hills, Uganda (coll...si sillimanite, ilm ilmenite, sp spinel, kr kornerupine, tur tourmaline, mt magnetite ~ C (Cuk~ radia-...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...1979), but other Mossbauer spectra obtained for Mautia Hill sapphirine (Bancroft et al. 1968) and synthetic |  | | Book | | GEMSTONES of East Africa Burundi, Kenya, Rwanda, Tanzania and Uganda Bruce Cairncross Published by Struik...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...countries are among the finest in the world. The region and its gems are particularly dear to my family |  | | Journal (article/letter/editorial) | | yoderite-bearing talc-kyanite-quartz schist from Mautia Hill, Tanzania (McKie, i958 ) is, as far as the authors...schist within this unit is on and around Chilapila Hill, 29 ~ 22' E., I 5 ~ 39' S., overlooking the Zambesi...it has not proved possible to return to Chilapila Hill for more detailed sampling. Preliminary information...sediment samples from streams draining Chilapila Hill do not contain any likely minerals besides gedrite...Kyanite Hematite Rutile Tourmaline Apatite ?Kornerupine 8HC I59 8HC 161 8HC 459 8HC I62" 8HC 4661 |  | Grew, E. S., Chernosky, J. V., Werding, G., ABRAHAM, K., MARQUEZ, N., HINTHORNE, J. R. (1990) Chemistry of Kornerupine and Associated Minerals, a Wet Chemical, Ion Microprobe, and X-Ray Study Emphasizing Li, Be, B and F Contents. Journal of Petrology, 31 (5) 1025-1070 doi:10.1093/petrology/31.5.1025 | Journal (article/letter/editorial) | | manuscript accepted 2 February 1990) ABSTRACT Kornerupine and associated minerals in 31 samples of high-grade...X-ray powder diffraction. For 11 samples of kornerupine and three samples of biotite (F only) analysed...B 2 O 3 =(M-01 wt.%; and F = 007-077 wt.% in kornerupine, whereas ion microprobe analyses on other kornerupines...or 21-5 (O) in kornerupine. In general, Li/Fe ratios decrease as follows: kornerupine » sapphirine ^...Na>004, Li/Fe decreases as follows: cordierite > kornerupine. Sapphirine and sillimanite are the only associated |  | Grew, Edward S., Redhammer, Guenther J., Amthauer, Georg, Cooper, Mark A., Hawthorne, Frank C., Schmetzer, Karl (1999) Iron in kornerupine; a57Fe Moessbauer spectroscopic study and comparison with single-crystal structure refinement. American Mineralogist, 84 (4) 536-549 doi:10.2138/am-1999-0407 | Journal (article/letter/editorial) | | Mineralogist, Volume 84, pages 536–549, 1999 Iron in kornerupine: A 57Fe Mössbauer spectroscopic study and comparison...ABSTRACT Iron is an important constituent of kornerupine, (M,Mg,Fe)(Al,Mg,Fe)9(Si,Al,B)5O21(OH,F). We...samples. The M1 doublet is split in B-bearing kornerupine and the proportion of Fe corresponding to each...Similarly, the X doublet is split in F-bearing kornerupine, and quadrupole splitting of the X site increases...a first approximation, the Fe31/SFe ratio in kornerupine determined by SREF and Mössbauer spectroscopy |  | | Journal (article/letter/editorial) | | first was discovered by McKie (1959) at Mautia Hill (Tanzania), while the second was discovered by Johnson...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...whiteschist. This variety is also reported to occur at Mautia Hill, though yoderite at this locality is predominantly...2] (Table 1). Natural yoderite formation at Mautia Hill was ascribed to the end-member reaction yoderite+quartz |  | | Report (issue) | | Association: Sillimanite, kyanite, cordierite, kornerupine, corundum, surinamite, phlogopite, chrysoberyl...near Messina, Transvaal, South Africa. In Tanzania, at Mautia Hill. From Waldheim, Saxony, Germany. At Naxos |  | | Journal (article/letter/editorial) | | Based on theoretical calculations of the EXAFS region, Fe(III) appears to be located in the 5-coordinated... a yoderite [>99% [5]Fe(III); from Mautia Hill, Kongwa, Tanzania], an acmite (>99% [6]Fe(III); from Mont...Energy steps of 2.5 eV were used for the post-edge region (7150±7350 eV). Pre-edge and XANES spectra were...size. They contribute dominantly in the edgecrest region (features B, C, D, and E). The convergence of the...contribute signi®cantly in some cases to the pre-edge region (as for the centrosymetric Oh symmetry: Brouder |  | | Journal (article/letter/editorial) | | Namaqualand, South Africa Madras, India Vishakhapatnam District, India 7563 89789 86875 b2I 86878 b2 89790 JAS-I...Ga=garnet, H bl hornblende, I/=ilmenite, Kr=kornerupine, Opx = orthopyroxene, Or = orthoclase, Pgc -...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) | | 3749/canmin.47.2.233 THE CRYSTAL CHEMISTRY OF THE KORNERUPINE–PRISMATINE SERIES. I. CRYSTAL STRUCTURE AND SITE...crystal structures of forty-seven crystals of the kornerupine–prismatine series have been refined to R indices...crystals covering the entire compositional range of kornerupine–prismatine, (2) a synergy among site-scattering...achieved for the entire dataset. Crystals of the kornerupine–prismatine series are orthorhombic, space group...minor Na and Ca, with □ > Mg � Fe2+. Keywords: kornerupine–prismatine, crystal-structure refinement, electron-microprobe |  | | Journal (article/letter/editorial) | | Springer-Verlag 1978 Synthesis and Crystal Chemistry of Kornerupine in the System M g O - A l 2 0 3 - SiO2 - B 2...Republic of Germany Abstract. Boron-bearing kornerupine was synthesized in the simplest possible model...and outside the stability field of boron-free kornerupine. Best conditions for synthesis of single-phase...: 4 in the direction towards 1 : 1 : 1. Thus kornerupine exhibits an at least ternary range of solid solution...significant that, although the Mg : A1 : Si ratio of kornerupine may remain constant with increasing boron contents |  | | Journal (article/letter/editorial) | | occurrence at Mautia Hill, on order-disorder in sapphirine, the borosilicates kornerupine and grandidierite...petrologic study, however, was never completed, Mautia Hill having become a centre for insurgents soon after |  | | Journal (article/letter/editorial) | | in the extended history of the Zambezi Belt this region was subject to tectonothermal regimes similar to...orthoamphibole, cordierite, sapphirine, chlorite, kornerupine, garnet, yoderite, haematite ± phengite, ± rutile...understanding the development of this complex tectonic region, as they lie at the triple junction between the...lithologically diverse section is centred around Kadunguri Hill (GR[ST 9619 3498]) (Fig. 3). STRUCTURAL SETTING...3. Detailed geological map of the Kadunguri Hill region. Circled stars indicate the localities of samples |  | | Journal (article/letter/editorial) | | data on an anomalous yellow sapphirine from Mautia, Hill, Tanganyika with a doubled D-repeat, and extra...formula is MgasAlsoSirrOzo. 2. Crystal from Mautia Hill, Tanganyika. McKie (1963) gave a 9.85 A, b 28...cordierite, spinel, corundum, and rarely kornerupine. Kornerupine, Iong a crystallochemical puzzle, was...octahedron between the wal1s resides above the ruled region. The secondcomponent includes all six nonequivalent...sapphirine.Nature,2l8,8l-82 J. M. Bnr.rNnrr (1968) Kornerupine: its crystal structurc. Science,159, 52+ 526 |  | | Journal (article/letter/editorial) | | Benson Mine District, Adirondack Mountains, New York and the Manitouwadge Massive Sulfide District, Ontario...infrared analyses on a h6gbomite from Liganga, Tanzania, and found no water. Thus the inconsistency remains:...(1963) Enstatite-tremolite-chlorite skarns, Mautia Hill Tanzania, Tanganyika Woodford and Wilson (1976)...Titanomagnetite ore lenses in anorthosite, Liganga, Tanzania 5H z+ . 43+ 0 8 ,. where SR~+ =0.21q3.39, R2_2xTlxR...Coolen (1981) Calcsilicate granulite, Furua, Tanzania (600-700 ~ C, 5-7 Kb) Granulite-metamorphosed |  | | Journal (article/letter/editorial) | | supercontinent, most likely related to the collision of the Tanzania Craton with the Azania microcontinent subsequent...collision of the Congo Craton (i.e., the Congo/Tanzania/ Bangweulu Block of Collins & Pisarevsky, 2005)...east and west of the ‘‘Western Granulites’’ of Tanzania (Hauzenberger et al., 2009), and finally younger...younger clockwise whiteschist metamorphism in Tanzania (Jöns & Schenk, 2004), pointing to a collisional...findings that India did not collide with the Congo/Tanzania/Bangweulu Block until the early Cambrian (e.g |  | Lal, R. K., Ackermand, D., Seifert, F., Haldar, S. K. (1978) Chemographic relationships in sapphirine-bearing rocks from Sonapahar, Assam, India. Contributions to Mineralogy and Petrology, 67 (2) 169-187 doi:10.1007/bf01046574 | Journal (article/letter/editorial) | | attributed to its significant fluorine content. Kornerupine occurs as armoured relics within cordierite in...pyrr-pyrrhotite, py-pyrite, tour-tourmaline, korn-kornerupine, oam-orthoamphibole, ta-talc. For the other abbreviations...+phl B-9 sill-co-ru In the assemblage A-l-1 kornerupine is present only as inclusions within cordierite...that their crystallisation is broadly coeval. Kornerupine was observed in only one sample (A-l-l) in which...phlogopite. The textural relations suggest that the kornerupine is an armoured relic of an earlier metamorphic |  | | Journal (article/letter/editorial) | | importance in tourmaline (see Sect. 4.2.3.), in kornerupine (Seifert, 1975), and apparently also in some...hydrous magnesium iron aluminosilicate from Mautia Hill, Tanganyika. Mineral. Mag. 32, 282 307 (1959)...41, 171-178 (1973) Seifert, F. : Boron-free kornerupine: a high-pressure phase. Am. J. Sci. 275, 57-87 |
|
