 | | Journal (article/letter/editorial) | | metaquartzites of the northern Serra do Espinhac o (State of Bahia, Brazil) G. Morteani1 and D. Ackermand2...horizon belongs to the Middle Proterozoic Serra de Vereda member of the S~ao Marcos Formation of the...hills of the Serra de Canas=Cana Brava (Northern Serra do Espinhac o, State of Bahia, NE Brazil) about 10...10 km west of the town of Boquira. Sky blue lazulite and deep blue to lilac dumortierite are enriched...controlled by the amount of xenotime, monazite and zircon. Oxygen thermometry on quartz and hematite and |  | | Journal (article/letter/editorial) | | (Northern Espinhaço, Brazil): LA-ICP-MS age determinations on relict and recrystallized zircon and geodynamic...(Northern Espinhaço, Brazil): LA-ICP-MS age determinations on relict and recrystallized zircon and geodynamic...range at 643±19 Ma. - Metamorphic zircon forms from protolith-zircon in a dissolution- - ip t precipitation...metamorphic overprinting of a psammitic rock 2. Zircon crystals can be replaced completely or can be preserved...preserved ip t completely 3. Local differences in zircon and/or fluid composition decide cr 4. Age of |  | Bitencourt, Caroline Novais, Cruz, Simone Cerqueira Pereira, dos Anjos Cruz, Vanderlucia, Pedrosa-Soares, Antônio Carlos, Paquette, Jean Louis, Alkmim, Ana Ramalho, Barbosa, Johildo Salomão Figueiredo (2019) Rifting events in the southern sector of the Paramirim Aulacogen, NE Brazil: New geochronological data and correlations for the São Francisco – Congo paleocontinent. Precambrian Research, 326. 417-446 doi:10.1016/j.precamres.2018.12.005 | Journal (article/letter/editorial) | | southern sector of the Paramirim Aulacogen, NE Brazil: new geochronological data and correlations for...southern sector of the Paramirim Aulacogen, NE Brazil: new geochronological data and correlations for...southern sector of the Paramirim Aulacogen, NE Brazil: new geochronological data and correlations for...Salomão Figueiredo Barbosa1 1 Universidade Federal da Bahia (UFBA), Pós-Graduação em Geologia. Rua Barão de...Geremoabo, s/n, Federação, 40170-209, Salvador, Bahia, Brasil; carolcnb@gmail.com (C.N. Bittencourt), |  | Visser, D., Felius, R. O., Moree, M. (1997) Augelite and cerian crandallite in dumortierite quartzites, Vaca Morta quarry, Vereda range, Macaúbas, Bahia, Brazil. Mineralogical Magazine, 61 (407) 607-609 doi:10.1180/minmag.1997.061.407.11 | Journal (article/letter/editorial) | | quartzites, Vaca Morta quarry, Vereda range, Macatibas, Bahia, Brazil D. Visser University Museum Utrecht...range, Macatibas, Bahia, Brazil. The Vereda range in the northwest of the state of Bahia is well known for...kyanite, crandallite, augelite, hematite, futile and zircon. The rock shows a distinct microscopic layering...dumortierite-kyanite-muscovite quartzite, Vaca Morta, Vereda range, Macabas, Bahia SiO2 TiO2 A1203 Fe203 FeO MnO MgO CaO...latediagenetic or metamorphic origin of lazulite in the Serra da Vereda quartzites, by a process of disassociation |  | | Journal (article/letter/editorial) | | y ORIGINAL PAPER Xenotime‑(Y) formation from zircon dissolution–precipitation and HREE fractionation:...metamorphosed phosphatic sandstone, Espinhaço fold belt (Brazil) Gerhard Franz1 · Giulio Morteani2 · Dieter Rhede3...xenotime-(Y) together with metamorphic zircon replaces detrital zircon in a phosphatic sandstone from the...the Mesoproterozoic Espinhaço fold belt, Brazil, in a dissolution–precipitation reaction: zircon1 (relict)...Xenotime-(Y) · Al–P quartzite · Espinhaço supergroup · Zircon · Monazite · REE fractionation · Tetrad effect |  | | Journal (article/letter/editorial) | | muscovite and dumortierite with the minor constituents zircon, monazite and xenotime in addition to quartz are...have been described e. g. from the Serra do Espinhaço (Bahia, Brazil, Casse- danne & Franco 1966, Cassedanne...Visser et al. 1997), from Diamantina (Minas Gerais, Brazil, Horn et al. 1996, Morteani & Ackermand 2001),...depositional age of 1800 Ma is consistent with the zircon ages of 1850 and 2500 Ma, stromatolite characteristics...rocks were metamorphosed between 536 ± 1 Ma (U – Pb zircon age) and 523 ± 2 Ma (U – Pb titanite age). All |  | | Journal (issue) | | Siderite Spessartine, almandine Topaz Wulfenite Zircon World of Stones, N211/96 2 3 TABLE. Chemical...Crystal 25x 17x 17mm. J& 60/13411. Agate (onyx) ?Brazil]. 6x 5 CM.N2 636/3292. Hofmann collection. All...Hungary, the Harz, Italy, Tirol, Saxony, Switzerland, Brazil, North America, Sitka Island, and Manila (Philippines)...Cacheuta 120- Las Plumas 121- Brumado 122- Itinga; Lavra da I lha: Taquaral 123- Diamantina 124- Galileia; Concelheiro...—xis unto 2 cm; ! villiaumite — xis up to 20 cm; zircon. Nova Scotia. Canada: !chabazite—Pansboro (*"acadialite"); |  | | Report (volume) | | Heteropol vie aral CMISetGr sec ce tiO ere et baaeen serra cre cee Calculated deformation-electron-density...light-element abundances. Nature 373:286 Carvalho da Silva J, Clark JR, Christ CL (1955) Crystal structure...Mineral 32:1-14. See also Jambor JL, Roberts AC, Vanko DA (1994) New Mineral Names. Am Mineral 79:1009-1014...Jambor JL, Mueller W, Shigley JE, Puziewicz J, Vanko DA (1984) New Mineral Names. Am Mineral 69:1193 Anovitz...Francis CA, Langley RH, Kissin SA, Shigley JE, Vanko DA, Zilczer JA (1984) Am Mineral 69:810 Malinko SV, | | | Report (volume) | | light-element abundances. Nature 373:286 Carvalho da Silva J, Clark JR, Christ CL (1955) Crystal structure...Mineral 32:1-14. See also Jambor JL, Roberts AC, Vanko DA (1994) New Mineral Names. Am Mineral 79:1009-1014...Francis CA, Langley RH, Kissin SA, Shigley JE, Vanko DA, Zilczer JA (1984) Am Mineral 69:810 Malinko SV,...121(4): 107112. See also Jambor JL, Roberts AC, Vanko DA (1994) New Mineral Names. Am Mineral 79: 1009-1014... See also Jambor JL, Grew ES, Puziewicz J, Vanko DA (1988) New Mineral Names. Am Mineral 73:441 Sokolova |
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