Departament de Mineralogia: Envíos recientes
Mostrando ítems 61-80 de 83
Critical elements in supergene phosphates: the example of the weathering profile at the Gavà Neolithic Mines, Catalonia, Spain
The essential role of Critical Elements (CE) in 21st century economy has led to an increasing demand of these metals and promotes the exploration of non-conventional deposits such as weathering profiles. The present work ...
Mineralogy and distribution of critical elements in the Sn–W–Pb–Ag–Zn Huanuni Deposit, Bolivia
The polymetallic Huanuni deposit, a world-class tin deposit, is part of the Bolivian tin belt. As a likely case for a “mesothermal” or transitional deposit between epithermal and porphyry Sn types (or shallow porphyry Sn), ...
Barcelona naturalista: descubriendo la ciudad más allá del cemento
Parada 1: La Estación de Campo de Can Catà del MCNB y los estudios de Ecología Evolutiva, por Joan Carles Senar Parada 2: Érase una vez… la historia geológica de Barcelona, por Iria Díaz-Ontiversos y Yael Díaz-Acha Parada ...
Indium mineralization in the volcanic dome-hosted Ánimas–Chocaya–Siete Suyos polymetallic deposit, Potosí, Bolivia
A volcanic dome complex of Miocene age hosts the In-bearing Ánimas–Chocaya–Siete Suyos district in SW Bolivia. Ore mineralization occurs as banded and massive infillings in sub-vertical, NE-SW striking veins. In this ...
The Poopó polymetallic epithermal deposit, Bolivia: mineralogy, genetic constraints, and distribution of critical elements
The tin-rich polymetallic epithermal deposit of Poopó, of plausible Late Miocene age, is part of the Bolivian Tin Belt. As an epithermal low sulfidation mineralisation, it represents a typological end-member within the ...
Building a future: the micromount collection-laboratory of the MCNB
Created in 1990, the Micromount collection of the Natural History Museum of Barcelona (MCNB) currently (May 2013) contains nearly 10.000 registered samples, including near 900 well identified mineral species and an interesting ...
Conservació i condicionament de la vitrina de les sals del Museu Martorell (Museu de Ciències Naturals de Barcelona): 1921-2018
La vitrina de les sals de Cardona és un mobiliari dissenyat i construït el 1921 per Francesc Pardillo. Localitzada a l’edifici del Museu Martorell (Museu de Ciències Naturals de Barcelona), exposa i preserva una col·lecció ...
Sistemas de gestión de muestras radioactivas y tóxicas en la colección de mineralogía del Museo de Ciencias Naturales de Barcelona (MCNB)
Las colecciones de minerales, desde sus inicios, han albergado ejemplares que pueden presentar cierto riesgo para la salud y que, generalmente, han sido manipulados, por desconocimiento, sin ningún tipo de prevención. El ...
Programa de gestió de colecciones de ciencias naturales: Pangea DB ® (V. 1.0)
La gestión de las colecciones del Museo de Ciencias Naturales de Barcelona (MCNB) requiere de una herramienta informática capaz de administrar la ingente cantidad de información asociada a las mismas. Una vez analizadas ...
A new kaolin deposit in western Africa: mineralogical and compositional features of kaolinite from Caluquembe (Angola)
Large kaolin deposits developed by weathering on Precambrian granitic rocks have been discovered in the Caluquembe area, Huíla province, Angola. To determine accuracy of analysis and to evaluate the samples kaolinite grade, ...
Distribution of REE-bearing minerals in felsic magmatic rocks and paleosols from Gran Canaria, Spain: Intraplate oceanic islands as a new example of potential, non-conventional sources of rare-earth elements
Gran Canaria is a hotspot-derived, intraplate, oceanic island, comprising a variety of alkaline felsic magmatic rocks (i.e. phonolites, trachytes, rhyolites and syenites). These rocks are enriched in rare-earth elements ...
Fe–Ti(–V) oxide deposits of the Kunene Anorthosite Complex (SW Angola): mineralogy and thermo-oxybarometry
The Kunene Intrusive Complex (KIC), in NW Namibia and SW Angola, is one of the largest Proterozoic anorthosite massif-type exposures in the world. A geochemical, mineralogical and petrological study of four Fe–Ti(–V) oxide ...
Recent carbonatitic magmatism in Angola: the dykes of the Chiva lagoon maar
Chiva is a circular lagoon with a diameter of 900 m, located in the vicinity of the Catanda graben (Angola). This area is largely covered by Quaternary lacustrine sediments, however, a few dykes of carbonatiticcomposition ...
The Neolithic variscite mines of Gavà, Catalonia: criteria for mineral exploration and exploitation in the Prehistory
The Gavà Neolithic Mining Complex (GNMC) located in Catalonia was devoted to the exploitation of green variscite used in the crafting of ornaments. Archaeological works in more than 100 mines indicated that this mining ...
Geological context and origin of the mineralization of the historic and prehistoric iron mines in the Gavà area, Catalonia, NE Iberian Peninsula
Mining for iron resources in the Gavà area of Catalonia occurred intermittently during the Iberian and Roman epochs, the Middle Ages, and continuing until the industrial era, as evidenced by historical and archaeological ...
Southwestern Africa on the burner: pleistocene carbonatite volcanism linked to deep mantle upwelling in Angola
The origin of intraplate carbonatitic to alkaline volcanism in Africa is controversial. A tectonic control, i.e., decompression melting associated with far-field stress, is suggested by correlation with lithospheric sutures, ...
Los minerales son inocentes; las personas, no (minerales y personas)
Se proponen una serie de temas para hacer pequeños trabajos de aula o de investigación complementarios a la materia Biología y Geología. Son temas que relacionan, por una parte, el uso de los minerales en la vida diaria ...
Los minerales de colección como recurso económico en países en vías de desarrollo
El coleccionismo de minerales es una actividad en expansión. El alto nivel de demanda de minerales y de sus derivados posibilita la creación de microempresas en países en vías de desarrollo que, con muy poca inversión de ...
