24/03/17 CORDILLERAN POLYMETALLIC DEPOSITS AS A DEPOSIT CLASS IN PORPHYRY SYSTEMS

PÏCNIC_REUNIÓ DIMECRES 22 DE FEBRER

30/01/2017-LA EXPLORACION MINERA DESDE EL PUNTO DE VISTA DE UN GERENTE DE EXPLORACION

Hugo Domínguez, from Dominican Republic, will be in the University of Barcelona next Monday (30/01/2017) giving the talk: “La exploración minera desde el punto de vista de un gerente de exploración” (Mining exploration from the perspective of an exploration manager). The talk will be at 11h at room 4.

He will speak about his long experience in the exploration field mainly in Dominican Republic but also in Central and South America. He will focus on the application of different technologies such as: SIG, teledetection, mineralogy and UAVS.

Citing the author:

“Un recuento de nuestras vivencias y experiencias a través de los años adquiridas en diferentes proyectos de exploración principalmente en la República Dominicana, Centro y Sudamérica. Con interés especial en las aplicaciones de las tecnologías de SIG, teledetección, mineralogía y más recientemente UAVs. En esta ponencia compartiremos nuestras experiencias ganadas y comentaremos sobre las virtudes de las aplicaciones de estas tecnologías a los fines prácticos del objetivo fundamental de la exploración, el hallazgo de yacimientos minerales de potencial económico. Compartiremos además de nuestras vivencias en el entorno ambiental y social de los proyectos.”

See you next Monday!

THE (NEXT) DOCTOR

We would like to announce that after several years of hard work and lots of stress, one of our members, Lisard Torró i Abat, has successfully finished his doctoral thesis!Like Cristina Vilanova de Benavent, Thomas Hans Aiglsperger and Marc Campeny Crego - the members that finished their doctoral thesis the past year - Lisard was also one of our first members, and a founder of the Student Chapter. Lisard was the Student Chapter’s president 3 years ago and has always been an active member!

Lisard Torró i Abat

With the help of his advisors; Dr. Joaquín A. Proenza and Dr. Joan Carles Melgarejo, and our unconditional support, he will defend his amazing research in the Faculty of Earth Sciences of the University of Barcelona: “The shift from subduction-initiation to true subduction in intra-oceanic systems: Tectonic, magmatic and metallogenic evolution of Early Cretaceous arc-related units of Central and Oriental cordilleras in the Dominican Republic” the next Friday 27^th of January in the Aula Magna at 11:00h.

02/12/2016 -03/12/2016 BARCELONA STUDENT CHAPTER’S WORKSHOP: SKARN DEPOSITS

Due to the high rate of participation in the previous activities organized by the Barcelona Student Chapter, we were more than devoted to the organization of our 5^th workshop dedicated to skarn deposits, which was held on the 2^nd and 3^rd of December at the Faculty of Geology of the University of Barcelona. It counted with the total participation of 29 assistants, some of them even coming from the University of Oviedo, Asturias. The aim of this workshop was to provide an approach of these types of deposits regarding: their structure and genesis, their geochemistry, petrology, mineralogy and a review on the diverse techniques used in their exploration to undergraduate, master and PhD students, as well as for other professionals interested in these typology of deposit.

Morning of day 2^nd December consisted of a cycle of conferences in which the followings were imparted: Albert Soler Gil (University of Barcelona) opened the session with an introductory lecture entitled Skarn-type deposits: genetic models in the Iberian Hercynian in which members were enlighted with the different complex processes responsible for the formation of these deposits, their structure, petrochemistry and classification. Proceeding into detail, Abigail Jiménez Franco (PhD student from the Polytechnical University of Catalonia- EPSEM) explained a particular example of skarn deposit with her lecture entitled The Velardeña (Zn-Pb-Cu) Skarn: new data on the mineralogy, fluid inclusions and isotopic geochemistry. Finally, Lluís Boixet Martí (Country Manager; Minería de Corcoesto S.L – Edgewater Exploration Ltd) treated the assistants to a memorable lecture entitled Prospection of auriferous deposits in the Iberian Peninsula. An example: the Carlés Skarn, Asturias in which members were provided not only with academic information but also with a business-exploration point of view.

In the same afternoon, assistants were invited to a 3-hour practical session imparted by Albert Soler that included hand-sample observation of numerous skarn samples and the visualization of the ores of these ones under reflected light microscope . During this session, assistants recognized various mineralogical assemblages of different types of skarns and familiarized with those samples belonging to the deposits visited on the fieldtrip.

The Barcelona Student Chapters one-day fieldtrip, leaded by Albert Soler, took place on the 3^rd of December. It consisted on the observation and study of a few distal and proximal skarns located in the Axial Pyrenees, closely related to the magmatic intrusions of the late Hercynian orogeny, which included: an idiocrase skarn, a hedenbergite skarn, a pyrrhotite skarn and an arsenopyrite skarnoid (Fig.6). Assistants were deeply involved and had great pleasure in listening to all explanations regarding the processes associated to the genesis of each of these deposits and had the opportunity to acquire exceptional hand samples.

We gratefully acknowledge all lecturers: Albert Soler Gil, Abigail Jiménez Franco and Lluís Boixet Martí for their overwhelming speeches. In addition we express our most true gratitude to the SGA for the economic support offered, which allowed us to develop and carry out successfully all our activities as well as to the Faculty of Geology for their logistic and equipment provided.

SGA-SEG WORKSHOP 2016: LOS DEPÓSITOS SKARN

Afegim també el formulari per accedir al workshop sense ser membre explícit de la SGA/SEG

Coffee stand 21st September

SGA SIBERIAN FIELD TRIP

14/05/2016 BARCELONA STUDENT CHAPTER – SANT JULIA DE LLOR I BONMATI MINING DISTRICT FIELD TRIP (MONTSENY-GUILLERIES: GIRONA).

The geochemistry of Ni in lateritic profiles and its relationship with the hosting minerals.

The laterite deposits placed in the Caribbean contain a significant amount of Ni.  Despite their geological relevance and economical interest, no detailed studies existed with regards to the mobility of Ni and its incorporation in their hosting minerals along the profiles. In the present talk, a set of results obtained by means of EMPA, µRAMAN, µXRF and µXAS from oxide type laterites from Cuba and silicate type laterites from Dominican Republic are presented. We studied the distribution of Ni in the limonitic and in garnieritic horizons to elucidate how Ni is accumulated in Mn-oxyhidroxides and within the Mg-hydrated phyllosilicates. The obtained results helped to explain the distribution and accumulation of Ni and the development of laterites from Moa-Bay and Falcondo Ni-laterite deposits. These studies also highlight how physicochemical factors such as soil porosity, pH regime and silica activity do have important implications for Ni accumulation and mobility across the profile.

Citing the lecturer, Josep Roqué Rosel himself:

“My research is focused on the measurement of the structure and chemistry of inorganic materials, with the goal of understanding and predicting their properties down to molecular levels. These in turn fundamentally control a wide range of geological and technological phenomena. I work primarily on ordered and disordered materials, including minerals, glassy silicates and ceramics. My primary research tools are X-ray Absorption Spectroscopy (XAS) and Transmission Electron Microscopy (TEM). The materials that I study are natural samples or are synthesized in the laboratory. The problems that I address are tied to large-scale processes in geology and geochemistry, as well as to those in high-tech industries. Among the former are the mechanisms involved in lateritic profile development and the accumulation of metals in soils; among the latter are the study of glasses, the study of the decay by-products in batteries and the optimization of catalysts.”