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oxygen
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framework silicates
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ring silicates
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metamorphic rocks
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serpentinite (2)
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metavolcanic rocks (1)
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schists
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chlorite schist (1)
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mineral deposits, genesis (5)
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1-20 OF 34 RESULTS FOR
Franqueira Deposit
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Image
Setting and schematic geological map of the Franqueira deposit, adapted fro...
in P–T PATH AND FLUID EVOLUTION IN THE FRANQUEIRA GRANITIC PEGMATITE, CENTRAL GALICIA, NORTHWESTERN SPAIN
> The Canadian Mineralogist
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 ...
in P–T PATH AND FLUID EVOLUTION IN THE FRANQUEIRA GRANITIC PEGMATITE, CENTRAL GALICIA, NORTHWESTERN SPAIN
> The Canadian Mineralogist
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
Image
A. Volatile density (δv) versus CO 2 mole %. B. CO 2 :CH 4 ratio versu...
in P–T PATH AND FLUID EVOLUTION IN THE FRANQUEIRA GRANITIC PEGMATITE, CENTRAL GALICIA, NORTHWESTERN SPAIN
> The Canadian Mineralogist
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.
Image
P–T reconstruction, with the isochores representative of the different type...
in P–T PATH AND FLUID EVOLUTION IN THE FRANQUEIRA GRANITIC PEGMATITE, CENTRAL GALICIA, NORTHWESTERN SPAIN
> The Canadian Mineralogist
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
P–T PATH AND FLUID EVOLUTION IN THE FRANQUEIRA GRANITIC PEGMATITE, CENTRAL GALICIA, NORTHWESTERN SPAIN
Journal: The Canadian Mineralogist
Publisher: Mineralogical Association of Canada
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) . ...
Journal Article
MINERALOGY, AGE, AND FLUID GEOCHEMISTRY OF THE RILA EMERALD DEPOSIT, BULGARIA
Journal: Economic Geology
Publisher: Society of Economic Geologists
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...
Image
Zoning in igneous-affiliated emerald deposits showing the diversity of sour...
in Non-pegmatitic Deposits of Beryllium: Mineralogy, Geology, Phase Equilibria and Origin
> Reviews in Mineralogy and Geochemistry
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
Series: Short Courses
Publisher: Mineralogical Association of Canada
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...
Image
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
In situ observations of the transition between beryl and phenakite in aqueous solutions using a hydrothermal diamond-anvil cell
Journal: The Canadian Mineralogist
Publisher: Mineralogical Association of Canada
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...
Journal Article
EMERALD MINERALIZATION ASSOCIATED WITH THE MAVIS LAKE PEGMATITE GROUP, NEAR DRYDEN, ONTARIO
Allison A. Brand, Lee A. Groat, Robert L. Linnen, Mary I. Garland, Frederick W. Breaks, Gaston Giuliani
Journal: The Canadian Mineralogist
Publisher: Mineralogical Association of Canada
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...
Journal Article
Gem Formation, Production, and Exploration: Why Gem Deposits Are Rare and What is Being Done to Find Them
Journal: Elements
Publisher: Mineralogical Society of America
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...
Journal Article
Mineralogy of Beryllium in Granitic Pegmatites
Publisher: Mineralogical Society of America
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...
Journal Article
MINERALOGICAL AND GEOCHEMICAL STUDY OF THE REGAL RIDGE EMERALD SHOWING, SOUTHEASTERN YUKON
Lee A. Groat, Daniel D. Marshall, Gaston Giuliani, Donald C. Murphy, Stephen J. Piercey, John L. Jambor, James K. Mortensen, T. Scott Ercit, Robert A. Gault, David P. Mattey, Dietmar Schwarz, Henri Maluski, Michael A. Wise, William Wengzynowski, Douglas W. Eaton
Journal: The Canadian Mineralogist
Publisher: Mineralogical Association of Canada
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...
Journal Article
Interesting Papers in Other Journals
Publisher: Geological Society of India
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
Compositions and formation conditions of fluid inclusions in emerald from the Maria deposit (Mozambique)
Journal: Mineralogical Magazine
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...
Journal Article
Be-Minerals: Synthesis, Stability, and Occurrence in Metamorphic Rocks
Publisher: Mineralogical Society of America
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...
Journal Article
VIGEZZITE AND ASSOCIATED OXIDES OF Nb–Ta FROM EMERALD-BEARING PEGMATITES OF THE VIGEZZO VALLEY, WESTERN ALPS, ITALY
Journal: The Canadian Mineralogist
Publisher: Mineralogical Association of Canada
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...
Journal Article
Non-pegmatitic Deposits of Beryllium: Mineralogy, Geology, Phase Equilibria and Origin
Publisher: Mineralogical Society of America
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...
Journal Article
Mineral chemistry and geochronology of the Rajasthan emerald deposits, NW India
Journal: The Canadian Mineralogist
Publisher: Mineralogical Association of Canada
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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