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Franqueira Deposit

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Setting and schematic geological map of the <span class="search-highlight">Franqueira</span> <span class="search-highlight">deposit</span>, adapted fro...
Published: 01 October 2000
F ig . 1. Setting and schematic geological map of the Franqueira deposit, adapted from Barrera et al. (1989) .
Image
CO 2 –CH 4 –N 2  ternary plot of the volatile-rich phase in the inclusions ...
Published: 01 October 2000
F ig . 5. CO 2 –CH 4 –N 2 ternary plot of the volatile-rich phase in the inclusions studied from the Franqueira deposit and each pegmatitic field from AEGC ( Fuertes-Fuente et al. 2000 ). The plot shows selected results of Raman analyses of the aqueous–carbonic fluid of the Franqueira deposit
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A. Volatile density (δv)  versus  CO 2  mole %. B. CO 2 :CH 4  ratio  versu...
Published: 01 October 2000
F ig . 4. A. Volatile density (δv) versus CO 2 mole %. B. CO 2 :CH 4 ratio versus H 2 O mole %. Determined from Raman analysis of individual fluid inclusions from the Franqueira deposit.
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P–T reconstruction, with the isochores representative of the different type...
Published: 01 October 2000
F ig . 6. P–T reconstruction, with the isochores representative of the different types of fluid inclusion in the Franqueira deposit. The dark zones are the minimum P–T conditions for the different stages of trapping of type-1 fluid inclusions in phenakite and emerald, type-2 and type-3
Journal Article
Published: 01 October 2000
The Canadian Mineralogist (2000) 38 (5): 1163–1175.
...F ig . 1. Setting and schematic geological map of the Franqueira deposit, adapted from Barrera et al. (1989) . ...
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Journal Article
Journal: Economic Geology
Published: 01 September 2001
Economic Geology (2001) 96 (6): 1469–1476.
... of emerald deposits involves intrusive beryllium-bearing pegmatites within Cr-(V)-bearing mafic-ultramafic rocks as described for the Spanish Franqueira ( Martin-Izard et al., 1995 ) and the Russian Toko-vaya-Malysheva deposits ( Beus, 1966 ). They are characterized by metasomatism due to fluid infiltration...
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Zoning in igneous-affiliated emerald <span class="search-highlight">deposits</span> showing the diversity of sour...
Published: 01 January 2002
Figure 28. Zoning in igneous-affiliated emerald deposits showing the diversity of source units (quartz veins, aplitic and pegmatitic dikes. felsic schist) and host rocks (silica-rich and silica-poor ultramafic and mafic compositions). For several of these occurrences metamorphic origins
Book Chapter

Series: Short Courses
Published: 01 January 2014
DOI: 10.3749/9780921294696.ch06
EISBN: 978-0-921294-69-6
... is the Franqueira emerald-alexandrite deposit in northwestern Spain ( Franz & Morteani 2002 , Franz et al. 1996 , Martin-Izard et al . 1995 , Grundmann & Morteani 1989 ). The Tokovaja deposit in Russia may also be representative of a “schist-type” deposit ( Franz & Morteani 2002 , Fuertes-Fuente...
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F ig . 3. a. Chemical composition diagram of phlogopites (plot of the AFVI ...
Published: 01 September 2001
( Laurs et al., 1996 ); 6 = South Africa - Cobra Pit ( Robb and Robb, 1986 ). Small gray circles correspond to the phlogopites from the Rila deposit (Rila I, high Mg type; Rila II, low Mg type). b. Chemical composition diagram of emeralds (plot of the A1 2 O 3 content, wt %, vs. FeO+MgO+Cr 2 O 3 +(V 2
Journal Article
Published: 21 December 2020
The Canadian Mineralogist (2020) 58 (6): 803–814.
... ), and other localities in Brazil ( Pough 1936a ), and in the Franqueira deposit in Spain ( Martin-Izard et al . 1995 ). Other localities initially claimed to be of this origin ( e.g ., classic Russian emerald deposits in the Urals) were later attributed to supercritical/hydrothermal and/or metamorphic...
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Journal Article
Published: 01 April 2009
The Canadian Mineralogist (2009) 47 (2): 315–336.
...‰) in Zimbabwe, Rila (9.3–9.5‰) in Bulgaria, Mjosasee (9.4–9.6‰) in Norway, Franqueira (9.75‰) in Spain, and Menzies (9.0‰) and Torrington (9.9‰) in Australia. Most if not all of these deposits are related to granites, pegmatites, or quartz veins. TABLE 8. STABLE ISOTOPE COMPOSITION OF SELECTED SAMPLES...
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Journal Article
Journal: Elements
Published: 01 June 2009
Elements (2009) 5 (3): 153–158.
... and tectonometamorphic processes, such as shear zone formation, have played a significant role in certain emerald deposits (notably Habachtal in Austria, Leydsdorp in South Africa, and Franqueira in Spain; Grundmann and Morteani 1989 ; Nwe and Morteani 1993 ; Franz et al. 1996 ). It is important to recognize...
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Journal Article
Published: 01 January 2002
Reviews in Mineralogy and Geochemistry (2002) 50 (1): 405–444.
... ), the Socoto mine at Salvador, Bahia ( Cassedanne 1985 ) and other localities in Brazil ( Pough 1936b ), the Franqueira deposit in Spain ( Martin-Izard et al. 1995 , 1996 ; Franz et al. 1996 ), Haramosh Mts. in Pakistan ( Laurs et al. 1996 ), and the Crabtree pegmatite of North Carolina ( Tappen and Smith...
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Journal Article
Published: 01 October 2002
The Canadian Mineralogist (2002) 40 (5): 1313–1338.
... mineralization described in the Cornubian magmatism ( Alderton & Harmon 1991 ) and with other emerald deposits such as Franqueira ( Fuertes-Fuente et al. 2000 ) and Gravellotte ( Nwe & Morteani 1993 ). Finally, the isotopic composition of the parental H 2 O lies partly within the range defined...
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Journal Article
Published: 01 August 1997
Jour. Geol. Soc. India (1997) 50 (2): 244–246.
... JOURNALS Vo1.24, No.12, December 1996 RACHEAL H. JAMES and HENRY ELDERFIELD: Chemistry of Ore Forming Fluids and Mineral Formation Rates in an Active Hydrothermal Sulfide Deposit on the Mid Atlantic Ridge. pp. 1147-1150 JILL DILL PASTERIS: Mt. Pinatubo Volcano and "negative" POllphyry Copper Deposits, pp...
Journal Article
Published: 01 February 2002
Mineralogical Magazine (2002) 66 (1): 201–213.
...Ye Vapnik; I. Moroz Abstract The compositions of fluid inclusions hosted in emerald and quartz (the Maria deposit, Mozambique) were studied using microthermometric and Raman microprobe techniques. The fluid inclusions in the emerald contain fluids within the Na-Ca-Mg-(HCO 3 ) − -(CO 3 ) 2− -Cl-H 2...
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Journal Article
Published: 01 January 2002
Reviews in Mineralogy and Geochemistry (2002) 50 (1): 551–589.
... of Be-mineral precipitation is explained with a low Al activity, and not with the thermal instability of beryl. The experimental data of Barton (1986) show that low Al activity and high alkalinity favor the formation of phenakite. For the Franqueira deposit in Spain at the contact between pegmatites...
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Journal Article
Published: 01 June 2008
The Canadian Mineralogist (2008) 46 (3): 619–633.
... pegmatites and ultrabasic rocks. Similar occurrences are noted in the Franqueira granitic pegmatite in Galicia, northwestern Spain, where Fuertes-Fuente et al. (2000) described a metasomatic pegmatite body hosting gem-quality emerald, phenakite and chrysoberyl, and in the Alpine-age Rila emerald deposit...
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Journal Article
Published: 01 January 2002
Reviews in Mineralogy and Geochemistry (2002) 50 (1): 591–691.
...Figure 28. Zoning in igneous-affiliated emerald deposits showing the diversity of source units (quartz veins, aplitic and pegmatitic dikes. felsic schist) and host rocks (silica-rich and silica-poor ultramafic and mafic compositions). For several of these occurrences metamorphic origins...
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Journal Article
Published: 15 June 2020
The Canadian Mineralogist (2020) 58 (3): 335–346.
...Paul Alexandre ABSTRACT The emerald deposits in Rajasthan, northwest India, are situated in a narrow NE–SW belt in the Aravalli Mountains. The studied deposits were formed by the metasomatic reaction between muscovite (± garnet ± tourmaline) pegmatites and lenticular bodies of altered ultramafic...
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