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Batalha Formation

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Journal Article
Published: 01 February 2011
The Canadian Mineralogist (2011) 49 (1): 277-300.
... or metaconglomerates of the Equador Formation, south of 6°40 ′ S latitude, namely the Batalha, Capoeira 2 (also referred in the literature as Mulungu), Quintos and Glorious deposits. The fifth occurrence is found in alluvium covering the same quartzites. Another pegmatite, named Carrascão (also known as Fazenda...
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Journal Article
Journal: Elements
Published: 01 August 2012
Elements (2012) 8 (4): 281-287.
... temperature, inhibit crystal nucleation, and greatly enhance chemical diffusion within the melt. If the concentration of volatiles, mainly H 2 O, of the remaining residual melt exceeds its solubility limit, an aqueous fluid exsolves from the melt and promotes the formation of a miarole, or primary pocket...
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Journal Article
Published: 01 October 2008
The Canadian Mineralogist (2008) 46 (5): 1097-1116.
... walls inward (secondary, late formation, probably at a hydrothermal stage after the crystallization and dissolution or resorption of the hosting pegmatite zone). All tourmaline crystals studied present low contents of Mn (assumed to be Mn 2+ ), ranging between 0.02 to 0.08 apfu in the case...
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Journal Article
Journal: Elements
Published: 01 October 2011
Elements (2011) 7 (5): 333-338.
... as a recorder of the geologic environments during its formation, tourmaline is a fascinating and beautiful gemstone known for its full spectrum of colors. Its attractive and complex color zoning and its occurrence as sharp prismatic crystals make it highly sought-after by mineral connoisseurs and gem...
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Journal Article
Journal: Elements
Published: 01 October 2011
Elements (2011) 7 (5): 313-319.
... of tourmaline formation have all been reconstructed using this unique isotopic broadband recorder. The chemical differentiation of our planet is largely achieved by fluids and melts that transport material from sources typically deep in the crust or upper mantle to the shallow crust or surface. These migration...
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Journal Article
Published: 01 August 2013
American Mineralogist (2013) 98 (8-9): 1610-1616.
.... Paraíba tourmaline-bearing pegmatites are rich in spodumene or lepidolite, and are emplaced in iron-poor quartzites or metaconglomerates of the Neoproterozoic Equador Formation. The Paraíba tourmaline occurs at the transition between the albite-rich inner intermediate zone and the quartz core...
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Journal Article
Published: 01 April 2010
Mineralogical Magazine (2010) 74 (2): 241-255.
... site ( MacDonald and Hawthorne, 1995 ). Traditionally, the name `Paraiba' is reserved for bright blue to green Cu-bearing tourmalines from the da Batalha mine in Paraiba state, northeastern Brazil ( Koivula and Kammerling, 1989 ). Saturated and less-saturated blue and green tourmalines have been mined...
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Series: Geological Society, London, Special Publications
Published: 01 January 2010
DOI: 10.1144/SP333.15
EISBN: 9781862395817
... formations were used in the past to build some of the most important monuments located in the central region of Portugal such as, the ‘Igreja de Santa Cruz’ in Coimbra (12th century) and the ‘Mosteiro da Batalha’ in Batalha (14th–16th centuries) ( Aires-Barros 2001 ). The research carried out in this paper...
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Journal Article
Journal: Clay Minerals
Published: 01 September 2011
Clay Minerals (2011) 46 (3): 473-485.
.... This is indicative of the dominance of montmorillonite rather than beidellite among the smectite minerals, which is independently proved by a pronounced IR band at 630 cm−1. The formation of pink montmorillonite is not directly related to the emplacement of the Li-bearing PT pegmatite. The sheet silicate developed...
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Journal Article
Journal: Elements
Published: 01 June 2009
Elements (2009) 5 (3): 159-162.
... of the observed differences are not fully understood. In other cases, suitable tests are still lacking. The stoichiometric components of garnets also depend on the geologic setting. In lithium pegmatites, minerals that crystallize late in the formation of the gem pockets in the pegmatites can be nearly devoid...
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Journal Article
Journal: Economic Geology
Published: 01 May 2003
Economic Geology (2003) 98 (3): 671-682.
.... Blake, and Ted Bunch 323 Study of the pore water chemistry through an argillaceous formation: a paleohydrochemical approach —Claude Degueldre, Andreas Scholtis, Andreas Laube, María Jesús Turrero, and Bertrand Thomas 55 The stability of antigorite in the systems MgO-SiO 2 -H 2 O (MSH) and MgO-Al...
Journal Article
Journal: Elements
Published: 01 June 2009
Elements (2009) 5 (3): 163-168.
... , Giard D , de Narvaez D , Rondeau B ( 2000 ) Oxygen isotopes and emerald trade routes since antiquity . Science 287 : 631 - 633 Groat LA , Laurs BM ( 2009 ) Gem formation, production, and exploration: Why gem deposits are rare and what is being done to find them...
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Journal Article
Published: 01 April 2016
American Mineralogist (2016) 101 (4): 889-906.
...-soluble.We tabulate 432 chemical formulas of plausible as yet undiscovered carbon minerals, some of which will be natural examples of known synthetic compounds, including carbides such as calcium carbide (CaC2), crystalline hydrocarbons such as pyrene (C16H10), and numerous oxalates, formates, anhydrous...
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Series: Geological Society, London, Special Publications
Published: 01 January 2010
DOI: 10.1144/SP331.16
EISBN: 9781862395794
... al. 1998 ). Several projects have examined historical quarries and exploitation methods, such as Portuguese projects on the quarries of the Batalha Monastery ( Neto et al. 2000 ) or a similar study on Lisbon's cathedral and Jerónimos Monastery. The need for a multidisciplinary approach...
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Journal Article
Journal: Economic Geology
Published: 01 November 2015
Economic Geology (2015) 110 (7): 1803-1834.
... of the Paracatu deposit in Brazil, a shallow-dipping, bulk-tonnage, vein-style low-grade Au(-Ag-Pb-Zn) orebody hosted in ~1000 Ma black phyllites of the Paracatu Formation, associated with intense shearing accompanying thrusting during the ~680 Ma Brasiliano orogeny. Massive to laminated quartz-sulfide-carbonate...
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Journal Article
Published: 01 February 2008
European Journal of Mineralogy (2008) 20 (1): 143-154.
... be featured by the formation of crystals from the pegmatitic melt, whereas in the hydrothermal-related stage fluids (especially H 2 O) were saturated and crystallization and alteration of crystals would exist simultaneously. It is reasonable to infer that the hydrothermal-related stage has a higher degree...
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Series: Geological Society, London, Special Publications
Published: 01 January 2017
DOI: 10.1144/SP442.17
EISBN: 9781786202925
... as the formation of mountain ranges as exemplified by the Sierra Nevada and the leading role the state of California played in the development of the theory of plate tectonics. For good reasons, no INHIGEO rule requires strong interconnections between the locale of meetings and their chosen themes. Some meeting...
Journal Article
Published: 01 January 2014
Reviews in Mineralogy and Geochemistry (2014) 78 (1): 371-398.
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Journal Article
Journal: Economic Geology
Published: 01 May 2006
Economic Geology (2006) 101 (3): 585-605.
..., mainly pyrite. Quartz from all samples shows weak undulose extinction and no recrystallization or orientation features, confirming its formation in a low-stress brittle regime as indicated by field and microscopic relationships described above. The highest salinities and homogenization temperatures...
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