Recent Posts by admin

2010: Tectonomagmatic setting and provenance of the Santa Marta schists, northern Colombia: insights on the growth and approach of Cretaceous Caribbean oceanic terranes to the South American continent

Tectonomagmatic setting and provenance of the Santa Marta schists, northern Colombia: insights on the growth and approach of Cretaceous Caribbean oceanic terranes to the South American continent Abstract Metamorphosed volcano-sedimentary rocks accreted to the northern South American continental margin are major vestiges of the Caribbean oceanic plate evolution and its interactions with the continent. Selected…
read more

2010: Jadeitite jade occurrence from the Sierra del Convento mélange (eastern Cuba)

Jadeitite jade occurrence from the Sierra del Convento mélange (eastern Cuba) Abstract A new jadeitite jade locality has been discovered in the serpentinite–matrix subduction mélange of the Sierra del Convento (eastern Cuba) in a context associated with tectonic blocks of garnet–epidote amphibolite, tonalitic–trondhjemitic epidote gneiss and blueschist. The jade outcrops occur as blocks surrounded by…
read more

2009: Zoning of laurite (RuS2)-erlichmanite(OsS2): implications for the genesis of PGM in ophiolite chromitites

Zoning of laurite (RuS2)-erlichmanite(OsS2): implications for the genesis of PGM in ophiolite chromitites Abstract We have investigated several chromite deposits in the Mayarí-Baracoa Ophiolite Belt (eastern Cuba) and in the Dobromirtsi metamorphosed ultramafic (ophiolitic) massif (SE Bulgaria) with regard to zoning in platinum-group minerals (PGM) of the laurite (RuS2)-erlichmanite (OsS2) solid solution series. We found…
read more

2009: Ni-sepiolite-falcondoite in garnierite mineralization from Falcondo Ni-laterite deposit, Dominican Republic

Ni-sepiolite-falcondoite in garnierite mineralization from Falcondo Ni-laterite deposit, Dominican Republic Abstract New chemical and structural data on sepiolite-falcondoite in garnierite veins from the Falcondo Ni-laterite deposits, central Dominican Republic, are reported. Samples of Ni-sepiolite-falcondoite vary in colour from whitish green to green depending on the NiO content (wt.%) and the amount of silica present. The…
read more

2009: The Loma Peguera ophiolitic chromitite (Central Dominican Republic): a source of new platinum group minerals (PGM) species

The Loma Peguera ophiolitic chromitite (Central Dominican Republic): a source of new platinum group minerals (PGM) species Abstract Platinum group element (PGE) rich ophiolitic chromitites associated with the Loma Peguera harzburgitic mantle have been investigated for Platinum group minerals (PGM) using electric pulse disaggregation (EPD) and hydroseparation (HS) techniques. Combination of these two techniques allows…
read more

2009: Structure of the accretionary prism, and the evolution of the Paleogene northern Caribbean subduction zone in the region of Camagüey, Cuba

Structure of the accretionary prism, and the evolution of the Paleogene northern Caribbean subduction zone in the region of Camagüey, Cuba Abstract The deformation history of sedimentary units incorporated in the North Cuban fold and thrust belt in the Paleocene to middle–late Eocene was associated with major shortening between the Caribbean and North American plates.…
read more

2009: A new jadeitite jade locality (Sierra del Convento, Cuba): First report and some petrological and archaeological implications.

A new jadeitite jade locality (Sierra del Convento, Cuba): First report and some petrological and archaeological implications. Abstract A new jadeitite jade locality has been discovered in the serpentinite-matrix subduction mélange of the Sierra del Convento (eastern Cuba) in a context associated with tectonic blocks of garnet-epidote amphibolite, tonalitic–trondhjemitic epidote gneiss, and blueschist. The mineral…
read more

2009: Fifty-five-million-year history of oceanic subduction and exhumation in the northern edge of the Caribbean plate (Sierra del Convento mélange, Cuba)

Fifty-five-million-year history of oceanic subduction and exhumation in the northern edge of the Caribbean plate (Sierra del Convento mélange, Cuba) Abstract Petrological and geochronological data of six representative samples of exotic blocks of amphibolite and associated tonalite-trondhjemite from the serpentinitic mélange of the Sierra del Convento (eastern Cuba) indicate counterclockwise P–T paths typical of material…
read more

2009: Textural Relations and Minerals Compositions of Garnierite Ores Using X-Ray Images

Textural Relations and Minerals Compositions of Garnierite Ores Using X-Ray Images Abstract “Garnierites” are significant ore minerals in the saprolitic horizons of Falcondo nickel laterite deposits in the Dominican Republic. The garnierite mineralization mainly occurs as millimetric to centimetric-thick veins. Other occurrences include tension fracturefillings, anastomizing veins, boxwork fabric, coatings on joints, often displaying slickensides…
read more

2009: Metamorfismo de los esquistos verdes y anfibolitas pertenecientes a los Esquistos de Santa Marta, Sierra Nevada de Santa Marta (Colombia): ¿Registro de la colisión entre el arco Caribe y la margen Suramericana?

Metamorfismo de los esquistos verdes y anfibolitas pertenecientes a los Esquistos de Santa Marta, Sierra Nevada de Santa Marta (Colombia): ¿Registro de la colisión entre el arco Caribe y la margen Suramericana? Abstract Los Esquistos de Santa Marta localizados en el segmento NW de la Sierra Nevada de Santa Marta, en el Caribe Colombiano, corresponden…
read more

2008: Paleogene Foredeep Basin Deposits of North-Central Cuba: A Record of Arc-Continent Collision between the Caribbean and North American Plates

Paleogene Foredeep Basin Deposits of North-Central Cuba: A Record of Arc-Continent Collision between the Caribbean and North American Plates Abstract Paleogene deposits of north-central Cuba have been identified as a deformed foredeep basin, whose stratigraphy recorded very well the collision of the Bahamas—Proto-Caribbean realm (North American plate) with the Caribbean plate, a process that occurred…
read more

2008: Latest Cretaceous collision/accretion between the Caribbean Plate and Caribeana: Origin of metamorphic terranes in the Greater Antilles

Latest Cretaceous collision/accretion between the Caribbean Plate and Caribeana: Origin of metamorphic terranes in the Greater Antilles Abstract Metasedimentary complexes dispersed all along the northwestern branch of the Caribbean orogenic belt between Yucatan and the Virgin Islands provide evidence for a major tectonic event of latest Cretaceous (Late Campanian-Early Paleocene) age that played a key…
read more

2008: Detrital zircon geochronology of Jurassic sandstones of western Cuba (San Cayetano Formation): Implications for the Jurassic paleogeography of the NW Proto-Caribbean

Detrital zircon geochronology of Jurassic sandstones of western Cuba (San Cayetano Formation): Implications for the Jurassic paleogeography of the NW Proto-Caribbean Abstract Clastic sediments of the early (?) to late Jurassic (Oxfordian) San Cayetano Formation of western Cuba are interpreted to reflect syn-rift sedimentation coeval with the breakup of Pangaea. This sedimentary unit is the…
read more

2008: Geochemical and Sr-Nd isotope signatures of pristine slab melts and their residues (Sierra del Convento mélange, eastern Cuba)

Geochemical and Sr-Nd isotope signatures of pristine slab melts and their residues (Sierra del Convento mélange, eastern Cuba) Abstract Major and trace element geochemical signatures and Sr–Nd isotope data of MORB-like amphibolite blocks and associated leucocratic low-K trondhjemitic rocks from the Sierra del Convento mélange (Cuba) indicate that oceanic crust underwent partial melting processes during…
read more

2008: Partial melting and counterclockwise P-T path of subducted oceanic crust (Sierra del Convento, E Cuba)

Partial melting and counterclockwise P-T path of subducted oceanic crust (Sierra del Convento, E Cuba) Abstract Partial melting of subducted oceanic crust has been identified in the Sierra del Convento mélange (Cuba). This serpentinite-matrix mélange contains blocks of mid-ocean ridge basalt (MORB)-derived plagioclase-lacking epidote ± garnet amphibolite intimately associated with peraluminous trondhjemitic–tonalitic rocks. Field relations,…
read more

2007: Magmatic paragonite in trondhjemites from the Sierra del Convento mélange, Cuba

Magmatic paragonite in trondhjemites from the Sierra del Convento mélange, Cuba Abstract In the Sierra del Convento mélange peraluminous trondhjemitic-tonalitic rocks, formed by partial melting of subducted oceanic crust at ca. 15 kbar, 700 °C, contain millimeter-sized crystals of paragonite that appear to be of magmatic origin. These crystals are replaced by plagioclase and quartz…
read more

2007: Chromite composition and platinum-group mineral assemblage of PGE-rich Loma Peguera chromitites, Loma Caribe peridotite, Dominican Republic

Chromite composition and platinum-group mineral assemblage of PGE-rich Loma Peguera chromitites, Loma Caribe peridotite, Dominican Republic Abstract The Loma Peguera chromitites are located in the central part of Loma Caribe peridotite in the Cordillera Central of Dominican Republic. The chromitite bodies are hosted in typical mantle peridotites, have small size (less than a few meters…
read more

2007: Geochemistry of cretaceous magmatism in Eastern Cuba: recycling of North American continental sediments and implications for subductions polarity in the Greater Antilles paleo-arc

Geochemistry of cretaceous magmatism in Eastern Cuba: recycling of North American continental sediments and implications for subductions polarity in the Greater Antilles paleo-arc Abstract We present whole-rock major- and trace-element and Nd-Sr-Pb radiogenic isotope data for Cretaceous igneous suites from eastern Cuba. These rocks are related to the Greater Antilles paleo-island arc magmatism and have…
read more

Recent Comments by admin

No comments by admin yet.

  • 2023: Geochemistry and Mineralogy of the Clay-Type Ni-Laterite Deposit of San Felipe (Camagüey, Cuba)

    Geochemistry and Mineralogy of the Clay-Type Ni-Laterite Deposit of San Felipe (Camagüey,...
    Read more
  • Recent Comments