 | | Journal (article/letter/editorial) | | of the Veredas formation (Northern Espinhaço, Brazil): LA-ICP-MS age determinations on relict and recrystallized...of the Veredas formation (Northern Espinhaço, Brazil): LA-ICP-MS age determinations on relict and recrystallized...quartzites of the Veredas formation (Northern Espinhaço, Brazil): LA-ICP-MS age 3 determinations on relict and...Veredas Formation (Northern 22 Espinhaço fold belt, Brazil) have been dated using laser ablation inductively...Neoproterozoic age of the metamorphosed zircons of the 35 Vereda formation corresponds to the Brasiliano-Panafrican |  | 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) | | dumortierite quartzites, Vaca Morta quarry, Vereda range, Macatibas, Bahia, Brazil D. Visser University...quartzites from the Vaca Morta Quarry, Yereda range, Macatibas, Bahia, Brazil. The Vereda range in the northwest...northwest of the state of Bahia is well known for the occurrence of dumortierite quartzites (Cassedanne...The granoblastic quartzite contains abundant muscovite and dumortierite, and minor amounts of kyanite...expressed by variable amounts of quartz and muscovite. Muscovite (up to 0.35 mm) in the studied samples is |  | | 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...world-wide e.g. from the present study area in Bahia (Brazil) by Cassedanne and Franco (1966), Cassedanne |  | | Journal (article/letter/editorial) | | berlinite, tourmaline, apatite, celestine, anhydrite, muscovite and dumortierite with the minor constituents zircon...berlinite, lazulite, scorzalite, dumortierite, muscovite, kyanite and temperature data from the literature...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),...coexistence of lazulite and dumortierite with muscovite, kyanite and tourmaline in the rocks that we studied |  | | Journal (article/letter/editorial) | | trolleite in association with kyanite, quartz, muscovite, paragonite, topaz, rutile, magnetite and hematite...except for Ky = kyanite, And = andalusite, Ms = muscovite, Zrn = zircon, Mnz = monazite, Xtm = xenotime...occurrence is represented by quartzites, quartz-muscovite-kyanite, quartz-muscoviteandalusite schists and...occur among garnet-bearing quartz-muscovite-feldspar and quartz-muscovite schists as several separated small...apatite and allanite. The garnet-bearing quartz-muscovite-feldspar schists consist of quartz, albite, relics |  | | Journal (issue) | | Trace-element Composition of Paraíba-type Tourmaline from Brazil, Mozambique and Nigeria By Martin Okrusch, Andreas...cushion and ~5 ct stone in ring) and from Paraíba, Brazil (3.5 mm gems in bracelet and 4.02 ct oval). Courtesy...Leonardo Silva Souto (Gems in Gems, Teófilo Otoni, Brazil) had approximately 50 cabochons weighing up to...as the spectra of tantalite-(Mn) from north-east Brazil, which contained supplementary bands at 621, 547...the Borborema pegmatite province, northeastern Brazil: Conditions of formation and melt and fluid-inclusion |  | | Journal (issue) | | Lower Cambrian : micashist, quartz-biotite or muscovite schist, gneiss, migmatite, marble, quartzite .../ Chuong Tran Cong Quan Cenozoic sediment Bai Da Lan Mong Son Yen Thai Khe Nhan Nui Chua complex...Spinel-titanoclinohumite association from a marble quarry near Rajapalaiyam area, part of the 550 Ma of southern...obtained exclusive rights to the mine (an open quarry, in accordance with Moroccan law). The company...Figure 2. This map shows the location of the Boudi quarry (outlined in red), in the Anti-Atlas mountain range |
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