graphite sulfide deposits in ronda and beni bousera
(PDF) Graphite vein mineralization in the ultramafic rocks
The magmatic crystallization of graphite in Beni Bousera S-G ores is supported by the described textural relationships in primary non-altered ores where graphite crystallizes shortly before or
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6th Orogenic Lherzolite Abstracts book
15h40-16h Tommasi The Beni Bousera peridotite an oblique-slip shear zone thinning the lithospheric mantle 16h-16h20 Hajjar The Sulfide and Graphite Mineralization of the Ultramafic Massif of Beni Bousera (Internal Rif Morocco) 16h20-16h40 Triantafyllou New interpretation of the tectonic metamorphic evolution of the Iriri-
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American Mineralogist Volume 105 Issue 12
Dec 07 2020 · In addition the intrusions that host economic Ni-Cu sulfide deposits in the CAOB usually have magma f O 2 of >FMQ 1.0 and sulfides with mantle-like δ 34 S values (–1.0 to 1.1‰) indicating that the oxidized mafic magmas may be able to dissolve enough mantle-derived sulfur to form economic Ni-Cu sulfide deposits.
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Graphite–sulfide deposits in Ronda and Beni Bousera
Graphite–sulfide deposits in Ronda and Beni Bousera peridotites (Spain and Morocco) and the origin of carbon in mantle-derived rocks E. Crespo a F.J. Luque a M. Rodas a H. Wada b F. Gervilla c a Dpto. Cristalografı´a y Mineralogı´a Facultad de Geologı´a
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The Graphite Deposit of Seathwaite in Borrowdale
Graphite–sulfide deposits in Ronda and Beni Bousera peridotites (Spain and Morocco) and the origin of carbon in mantle-derived rocks. Gondwana Research Vol. 9 Issue. 3 p. 279. Gondwana Research Vol. 9 Issue. 3 p. 279.
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ABSTRACTEstudios Geológicos
The Ronda (and the Beni Bousera) peridotites form two of the largest outcrops of orogenic peridotites in the world. graphite and apatite are also abundant. The rhyolitic layers contain abundant K-feldspar while cordierite is rare. Indeed the deposit of the carbonates is interpreted as indicative of the generalized marine
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American Mineralogist Volume 105 Issue 12
Dec 07 2020 · In addition the intrusions that host economic Ni-Cu sulfide deposits in the CAOB usually have magma f O 2 of >FMQ 1.0 and sulfides with mantle-like δ 34 S values (–1.0 to 1.1‰) indicating that the oxidized mafic magmas may be able to dissolve enough mantle-derived sulfur to form economic Ni-Cu sulfide deposits.
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Graphite–sulfide deposits in Ronda and Beni Bousera
Abstract This paper describes unusual graphite–sulfide deposits in ultramafic rocks from the Serranía de Ronda (Spain) and Beni Bousera (Morocco). These deposits occur as veins stockworks and
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THE GEOLOGICAL CIRCUIT OF THE FOUR STRUCTURAL
In our view the Beni Bousera-Ronda lherzolites emplaced as tectonic slivers during the Paleogene subduction/collision process at the expense of the infra-continental lithospheric mantle uplifted at upper crustal levels during the Tethyan rifting (Reuber et al. 1982 Michard et al. 1991). Indeed the Ojen eclogites and Ronda pyroxenites
Get PriceAMERICAN JOURNAL OF SCIENCE VOL. 298 JUNE 1998 471
Serrania de Ronda (Betic Cordillera southern Spain) and Beni-Bousera (Morocco) and withJurassic alkaline basalts near Huelma in the external parts of the Betic Cordillera (southern Spain) (Gervilla 1989 Luque Rodas and Galm 1992 Barrenechea and others 1997). Other vein-graphite occurrences also have been described in acid-
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Origin and consequences of western Mediterranean
Agreement exists on the oldest volcanic and volcaniclastic arc deposits in the Provence Sardinia and in the highest structural units of the Alboran domain (Figure 1) with ages of 38–32 Ma Beccaluva et al. 2011 Lustrino et al. 2011 suggesting that subduction below Iberia and southern France was active since at least late Eocene time.
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Publicaciones en revistasUGR
Graphite-sulfide veins in Ronda and Beni-Bousera orogenic lherzolites (Spain and Morocco) and the origin of carbon in mantle-derived rocks. Gondwana Research. 9
Get PricePlatinum-Group Element Distribution in Some Ore Deposits
The Main Sulfide Zone (Great Dyke Zimbabwe) is a The Cr–Ni ores of Ronda and Beni Bousera are 1.8 m thick (on average) partially altered pyroxenite made up of chromite and Ni arsenides associated with 170 F. Gervilla et al. orthopyroxene or cordierite or both 8 .
Get Price(PDF) Vein graphite deposits geological settings origin
The incompat- 2H2O (Barrenechea et al. 2009). ible behaviour of carbon in the mantle-derived magmas would The magmatic graphite-sulfide vein deposits at Serranía de have caused its concentration in residual sulphide-rich melts Ronda and Beni Bousera imply graphite crystallization from
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Petrología y GeoquímicaPublicaciones
Partition coefficients of platinum group and chalcophile elements between arsenide and sulfide phases as determined in the Beni Bousera Cr-Ni mineralization (North Morocco).ECONOMIC GEOLOGY 108
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CORE
The alpine lherzolite massifs of southern Spain (Serrania de Ronda) and northern Morocco (Beni Bousera) are mantle intrusions emplaced at high temperature in the continental crust. Three types of mineralization occur in the lherzolites (1) chromite-Ni arsenide ores (Cr-Ni ores) with orthopyroxene and/or cordieritc (2) chromite ores (Cr ores
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Comparison of PGE Trace Analyses of Pentlandite and Some
1984) 3) Ronda and Beni Bousera Cr-Ni ores in Spain and Morocco (Gervilla and Leblanc 1990) 4) and arsenide-rich sulfide ores of the Vammala and Kylmäkoski Ni-Cu mines in Finland (Gervilla et al. 1998). Analytical techniques Trace EPMA of pentlandite arsenides
Get PriceGraphite–sulfide deposits in Ronda and Beni Bousera
BibTeX MISC 05graphite–sulfidedeposits author = title = Graphite–sulfide deposits in Ronda and Beni Bousera peridotites year = 2005
Get Price(PDF) Graphite vein mineralization in the ultramafic rocks
The magmatic crystallization of graphite in Beni Bousera S-G ores is supported by the described textural relationships in primary non-altered ores where graphite crystallizes shortly before or
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Minerals Free Full-Text Natural Graphite Cuboids HTML
So far the formation of graphite aggregates as products of the diamond graphitization processes is evident only for the Beni Bousera 35 36 96 and Ronda complexes. Indeed Slodkevich 35 36 reported the graphite aggregates with almost perfect octahedral morphology and even their twins (see Figure 1 in 36 ).
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The Kansanshi Copper Mine (Solwezi Area northwestern
Evidence for segregation of fluid-rich acidic silicate melt sulphide and arsenide melts during chromite crystallization in mantle rocks (Beni Bousera Morocco) Role on PGE fractionation Leblanc M. / Gervilla F. / Society for Geology Applied to Mineral Deposits (SGA) 1995
Get PricePartition Coefficients of Platinum Group and Chalcophile
number of As-rich Ni-Cu sulfide ores PGE preferentially concentrate in the most As rich ore zones leaving the rela-tively As poor S rich zones typically depleted in such noble metals (e.g. Ronda and Beni Bousera ultramafic massifs Spain and Morocco respectively Gervilla and Leblanc 1990
Get PriceMinerals Free Full-Text Natural Graphite Cuboids HTML
So far the formation of graphite aggregates as products of the diamond graphitization processes is evident only for the Beni Bousera 35 36 96 and Ronda complexes. Indeed Slodkevich 35 36 reported the graphite aggregates with almost perfect octahedral morphology and even their twins (see Figure 1 in 36 ).
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Isotopic Signatures of Carbon in the Los Pobres Graphite
The graphite mineralization of Ronda is a rare deposit and can be found in only a few other places in the world such as in Beni Bousera (Morocco) and Borrowdale (UK). This fact and the relatively minor volume of the Los Pobres mineralization make it less interesting for mining.
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Magmatic ores in high-temperature alpine-type lherzolite
S-G ores comprise a pyrrhotite-pentlandite-(chalcopyrite-cubanite)-graphite association which also includes Fe-rich chromites with high Zn and V contents their platinum-group element and Au contents are much lower than those of Cr and Cr-Ni ores (<0.5 ppm platinum-group elements and <4 ppm Au).The proposed metallogenic model comprises (1
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Liquid immiscibility between arsenide and sulfide melts
Jul 04 2014 · Crespo E Luque FJ Rodas M Wada H Gervilla F (2006) Graphite-sulfide deposits in Ronda and Beni Bousera peridotites (Spain and Morocco) and the origin of carbon in mantle-derived rocks. Gondwana Res 9 279–290
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6th Orogenic Lherzolite Abstracts book
15h40-16h Tommasi The Beni Bousera peridotite an oblique-slip shear zone thinning the lithospheric mantle 16h-16h20 Hajjar The Sulfide and Graphite Mineralization of the Ultramafic Massif of Beni Bousera (Internal Rif Morocco) 16h20-16h40 Triantafyllou New interpretation of the tectonic metamorphic evolution of the Iriri-
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Graphite–sulfide deposits in Ronda and Beni Bousera
Apr 01 2006 · Graphite–sulfide deposits in Ronda and Beni Bousera peridotites (Spain and Morocco) and the origin of carbon in mantle-derived rocks 1. Introduction. Native carbon in mantle-derived rocks occurs both as diamond and graphite. Most diamond occurrences are 2. Geologic setting. The ultramafic rocks
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American Mineralogist Volume 105 Issue 12
Dec 07 2020 · In addition the intrusions that host economic Ni-Cu sulfide deposits in the CAOB usually have magma f O 2 of >FMQ 1.0 and sulfides with mantle-like δ 34 S values (–1.0 to 1.1‰) indicating that the oxidized mafic magmas may be able to dissolve enough mantle-derived sulfur to form economic Ni-Cu sulfide deposits.
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