 | Gervilla, F., Proenza, J.A., Frei, R., González-Jiménez, J.M., Garrido, C.J., Melgarejo, J.C., Meibom, A., Díaz-Martínez, R., Lavaut, W. (2005) Distribution of platinum-group elements and Os isotopes in chromite ores from Mayarí-Baracoa Ophiolitic Belt (eastern Cuba) Contributions to Mineralogy and Petrology, 150 (6) 589-607 doi:10.1007/s00410-005-0039-2 | Journal (article/letter/editorial) | | and Os isotopes in chromite ores from Mayarı́-Baracoa Ophiolitic Belt (eastern Cuba) Received: 22 April...Abstract The Mayarı́-Baracoa ophiolitic belt in eastern Cuba hosts abundant chromite deposits of historical...importance. Among these deposits, the chemistry of chromite ore is very variable, ranging from high Al (Cr#=0...correlate negatively with the Pd/Ir ratio showing that chromite concentrates mainly Os, Ir and Ru which gives...increasing whole-rock PGE contents and Cr# of chromite. Furthermore, cOs values of all but one of the |  | | Journal (article/letter/editorial) | | 547•566 A1-andCr-RichChromitites fromthe Mayarf-Baracoa Ophiolitic Belt(EasternCuba): Consequence of Interaction...deGeologia, InstitutoSuperior MineroMetahirgico deMoa(Cuba),andDepartament deCristallografia, Mineralogia i...34095Montpellier Cedex05,France Abstract The Mayar/-Baracoa beltoccupies theeasternmost partof theeast-west-trending...belt.It comprises twolarge,chromite-rich massifs: Mayarf-Cristal andMoa-Baracoa. Neitherof thesemassifs...andradiolarites. Chromite deposits canbe grouped intothreeminingdistricts according to thechemistry of chromite ore: |  | | Journal (article/letter/editorial) | | Gold in Supergene Nickel Ores of the Moa and Nikaro Deposits (Cuba) V. G. Lazarenkov1, I. N. Tikhomirov2...oxide–silicate ores of the Moa and Nikaro deposits, as well as their reworking products in the Moa and Nikaro ore...Serov, Ufalei, and Elizaveta deposits of the Ural province demonstrated that contents of PGM, Au, and Ag...deposits of Cuba is of great industrial interest. Nickel reserves in the laterite sheet of Cuba amount to...to 18 Mt (Mikhailov, 2002). In this respect, Cuba holds the first place among world exporters of this |  | Frei, R., Gervilla, F., Meibom, A., Proenza, J.A., Garrido, C.J. (2006) Os isotope heterogeneity of the upper mantle: Evidence from the Mayarí–Baracoa ophiolite belt in eastern Cuba. Earth and Planetary Science Letters, 241 (3) 466-476 doi:10.1016/j.epsl.2005.11.043 | Journal (article/letter/editorial) | | mantle: Evidence from the Mayarı́–Baracoa ophiolite belt in eastern Cuba R. Frei a,*, F. Gervilla b, A....mantle, 27 chromite separates from the 90 My old chromite deposits in the Mayarı́–Baracoa ophiolite belt...belt in eastern Cuba have been investigated for platinum group element (PGE) concentrations and Re–Os...heterogeneity. The initial 187Os/188Os ratios vary with chromite chemistry and with geographical distribution,...divided into three groups. In the Moa– Baracoa district, where the chromite bodies are located in the mantle–crust |  | González-Jiménez, J.M., Proenza, J.A., Gervilla, F., Melgarejo, J.C., Blanco-Moreno, J.A., Ruiz-Sánchez, R., Griffin, W.L. (2011) High-Cr and high-Al chromitites from the Sagua de Tánamo district, Mayarí-Cristal ophiolitic massif (eastern Cuba): Constraints on their origin from mineralogy and geochemistry of chromian spinel and platinum-group elements. Lithos, 125 (1) 101-121 doi:10.1016/j.lithos.2011.01.016 | Journal (article/letter/editorial) | | from the Sagua de Tánamo district, Mayarí-Cristal ophiolitic massif (eastern Cuba): Constraints on their...Superior Minero Metalúrgico de Moa, Las Coloradas s/n, 83320, Moa, Holguín, Cuba e Empresa Geominera de Oriente...Oriente, Carretera de Siboney s/n, Santiago de Cuba, Cuba b a r t i c l e i n f o Article history: Received...Platinum-group elements Platinum-group minerals Cuba a b s t r a c t Several chromitite bodies of variable...mining district of Sagua de Tánamo, in the Mayarí-Cristal ophiolitic massif, eastern of Cuba. The chromian |  | Marchesi, Claudio, González-Jiménez, José María, Gervilla, Fernando, Garrido, Carlos J., Griffin, William L., O’Reilly, Suzanne Y., Proenza, Joaquín A., Pearson, Norman J. (2011) In situ Re–Os isotopic analysis of platinum-group minerals from the Mayarí-Cristal ophiolitic massif (Mayarí-Baracoa Ophiolitic Belt, eastern Cuba): implications for the origin of Os-isotope heterogeneities in podiform chromitites. Contributions to Mineralogy and Petrology, 161 (6) 977-990 doi:10.1007/s00410-010-0575-2 | Journal (article/letter/editorial) | | Mayarı́-Cristal ophiolitic massif (Mayarı́-Baracoa Ophiolitic Belt, eastern Cuba): implications for the origin of...in the Mayarı́-Cristal ophiolitic massif (eastern Cuba) were formed in the Late Cretaceous when island...with residual mantle peridotites and generated chromite-rich bodies enclosed in dunite envelopes. Platinum-group...between 0.1185 and 0.1232 in two PGM included in chromite which are only several millimeters apart. As the...al. 2007). PGM are principally associated with chromite deposits in layered mafic intrusions and ophiolitic |  | González-Jiménez, José María, Griffin, William L., Proenza, Joaquín A., Gervilla, Fernando, O'Reilly, Suzanne Y., Akbulut, Mehmet, Pearson, Norman J., Arai, Shoji (2014) Chromitites in ophiolites: How, where, when, why? Part II. The crystallization of chromitites. Lithos, 189. 140-158 doi:10.1016/j.lithos.2013.09.008 | Journal (article/letter/editorial) | | relevant to the formation of concentrations of chromite in NU peridotites from ophiolitic (s.l.) sequences...include major- and trace-element contents of ED chromite and coexisting phases and especially the nature...generated through the disequilibrium precipitation of chromite, forced by small-scale mingling of melts that...producing more chromite. Chromite is carried to its final deposition by migration of the chromite-bearing melts...portions of ophiolitic mantle; dunite margins around chromite segregations represent the original host rock |  | | Report (issue) | | 954-B GEOLOGY AND CHROMITE DEPOSITS OF THE CAMAGUEY DISTRICT CAMAGUEY PROVINCE, CUBA BY DELOS E. FLINT...DIRECCION DE MONTES, MINAS Y AGUAS REPUBLICA DE CUBA under the auspices of the INTERDEPARTMENTAL COMMITTEE...Geologic map of the Camaguey chromite district, Camaguey Province, Cuba................................Camaguey district, Cuba........................................ In pocket FIGURE 1. Index map of Cuba showing...showing location of the Camaguey chromite district................................................. 40 2 |  | | Book (edition) | | precursor (see photo below). Right: Intercumulus chromite grain (medium grey) displaying embayments that...that are typical for the partial resorption of a chromite in disequilibrium with the surrounding ultramafic...to the developing crystal. Thus, oxides such as chromite, ilmenite, and magnetite plus PGE alloys separate...Rounded euhedral chromite in a silicate matrix (top) and Right (bottom): Massive chromite (medium grey)...dominantly silicic magma. Right (top): Intergranular chromite (lighter grey) in ultramafic silicate matrix (dark |  | | Report (issue) | | District_____________________________ Mackenzie District---------------------------Yukon Territory ---...Rica_______________________________________________ Cuba----------------------------------------------------Dominican...arranged alphabetically by country and State or Province; the deposits are numbered sequentially within...resistates); tan, a laterite (sur- and Rarige Province where intrusive activity and ficial residual concentration...the characteristics of the deposits within the district may be shown also; this may be placed arbitrarily |  | | Report (issue) | | Rica____________________________ CSCS ________ _ 24 Cuba---------------------------------- CUCU ________...arranged numerically by country and by State, Province, or other subdivisions in the larger countries...CAMBORNE AREA CAMBRIAN CHIEFTAIN MINE CARIBOO DISTRICT CARIBOO HEART RANGE (NORTHSTAR) CARIBOO, GOLD...CHORKBAK INLET DUNDAS ISLAND EGE BAY-GRANT SUTTlE BAY DISTRICT GENERATOR LAKE KOROK INLET MALTBY LAKE MARY RIVER...BISSETT LAKE AREA CHRISTOPHER ISLAND CULLATON LAKE DISTRICT FERGUSON LAKE HENINGA LAKE KAZAN FALLS-THIRTY |
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