Renata Barros

Renata Barros
Royal Belgian Institute of Natural Sciences · Geological Survey of Belgium

PhD

About

36
Publications
12,604
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104
Citations
Introduction
Why is geology essential in the transition to a more sustainable future, and how can we do a better job at explaining the importance of geological knowledge to society? These are the main questions guiding my research. Since joining the GSB in 2019 I have been involved in Belgian and European projects demonstrating geodata solutions for subsurface resource potential and management. My focus is on Critical Raw Materials in lithium pegmatite and Zn-Pb deposits.
Additional affiliations
March 2019 - present
Royal Belgian Institute of Natural Sciences
Position
  • Project Manager
Description
  • Manager & Researcher of the H2020 GeoERA GeoConnect³d project
January 2014 - December 2017
University College Dublin
Position
  • PhD Student
Description
  • Petrogenetic studies of lithium-rare metal pegmatites associated with the Leinster Batholith, SE Ireland
August 2011 - December 2012
University of São Paulo
Position
  • Student
Description
  • Petrogenetic studies of granulites and migmatites associated with the Socorro-Guaxupe Thrust Nappe in Minas Gerais, Brasil
Education
February 2008 - December 2012
University of São Paulo
Field of study
  • Geology

Publications

Publications (36)
Conference Paper
Full-text available
The transition towards a clean and low carbon energy system in Europe will increasingly rely on the use of the subsurface. Communicating the potential and limitations of subsurface resources and applications remains challenging. This is partly because the subsurface is not part of the world people experience, leaving them without reference frame to...
Conference Paper
Full-text available
It is widely known that the subsurface will play a crucial role in the transition towards a carbon-neutral society, with the aid of technologies like geothermal energy, CO2-storage, …. Nevertheless, still a lot of aspects concerning the subsurface, its structure and characteristics remain to be investigated to facilitate the use of underground spac...
Conference Paper
Full-text available
The battery market for electric vehicles and renewable energy storage is dominated by rechargeable lithium-ion batteries, making lithium supply essential to climate action through decarbonization. In 2019, more than half of the world's lithium was sourced from lithium pegmatites of the Li-Cs-Ta (LCT) family, predominantly from Australia. Current gl...
Conference Paper
Full-text available
The transition towards a clean and low carbon energy system in Europe will increasingly rely on the use of the subsurface. Despite the vastness of subsurface space, only a fraction of it is suitable for the exploitation of geo-resources. The distribution and fitting combination of required conditions is determined by geological processes. We are, t...
Article
Full-text available
Compared to average crustal abundances, high field strength elements (HFSEs) including Zr, Nb, Hf, Ta, and U are commonly enriched in rare element pegmatites. Albite-spodumene pegmatites may show economic grades of these elements, along with Sn, primarily in oxide minerals. Processes leading to enrichment and precipitation of HFSEs in these rocks a...
Article
Full-text available
Naturally CO2-rich mineral water springs (pouhons) in east Belgium occur in the context of the Rhenohercynian domain of the Variscan fold-and-thrust belt, mostly within the Cambro-Ordovician Stavelot-Venn Massif. The origin of the CO2 is still unclear, although different hypotheses exist. In this review study, we show pouhon waters are of the calci...
Presentation
Full-text available
The societal development towards climate neutrality and the ambition for economic growth and well-being in Europe rely on mineral raw materials. Mineral occurrences can be seen as manifestations of specific geological processes that happened in the subsurface, or geomanifestations. Locating and better understanding mineral occurrences and deposits...
Presentation
Full-text available
A structural framework is a well-defined concept, being used primarily to add structural understanding to a geological model. Within GeoConnect³d, a new approach is used, i.e. the structural framework concept is modified to become the leading model, in which geological maps and models can be inserted and related to. This structural framework is bei...
Presentation
Full-text available
Numerous naturally CO2-rich mineral water springs, locally called ‘pouhons’, occur in southeast Belgium. These are oversaturated in CO2 (up to 4g/L) and have attracted economic, touristic and scientific interest for centuries. Water sources occur within Palaeozoic rocks of the Rhenohercynian deformation zone, a fold-and-thrust belt at the north of...
Presentation
Full-text available
GeoConnect³d introduced the concept of geomanifestations to define any distinct local expression of ongoing or past geological processes. These manifestations, or anomalies, often point to specific geologic conditions and, therefore, can be important sources of information to improve geological understanding of an area. Examples include seismicity,...
Poster
Full-text available
Deposit models for lithium are not as advanced as those for high-demand metals such as copper, which poses a major challenge to lithium exploration. Glaciated and densely vegetated terrains typical of much of Canada and Europe present additional obstacles. Paragenesis and chemistry of minerals in lithium pegmatite deposits can be utilized to improv...
Presentation
Spodumene pegmatites and related rocks are globally important sources of lithium and tantalum, essential in electric batteries and microcapacitors, respectively. They are also enriched in other rare metals including tin, rubidium and cesium. Despite many decades of study, the origin and crystallization of their magmas remain controversial. There is...
Poster
Full-text available
Lithium-ion batteries dominate the market for electric vehicles, consumer electronics and renewable energy storage, making lithium supply essential to climate action through decarbonisation. In 2018, over 60% of the world’s lithium was mined from pegmatites containing the mineral spodumene in Australia; the remainder was produced from subsurface br...
Article
Internal differentiation and consequent geochemical evolution in pegmatites are significant processes in the development of economically viable deposits of metal-bearing minerals. Albite-spodumene pegmatites, which represent important resources of Li and Ta worldwide, challenge the general rules of pegmatite petrogenesis as these are nearly homogen...
Conference Paper
Full-text available
An increasing demand for high-technology elements resulted in current exploration by Blackstairs Lithium Ltd. in a highly prospective area with anatectic [1] lithium-caesium-tantalum-enriched (LCT) pegmatites of the albite-spodumene subtype. The LCT pegmatites are restricted to the East Carlow Deformation Zone (ECDZ) at the eastern margin of the la...
Article
Full-text available
Trace-element imaging of white mica and columbite group minerals (CGM) reveals that the magmatic–hydrothermal transition during the formation of late-orogenic anatectic lithium-caesium-tantalum-enriched (LCT) pegmatites of Leinster, SE Ireland, can be described by a three-stage process. The first stage is characterized by crystallization from a wat...
Conference Paper
Full-text available
Results from new field and laboratory experiments to investigate the use of crushed basalt as a CO2 sequestering soil amendment for removal of atmospheric CO2 will be presented. Unlike previous studies that envisage energy and carbon-intensive mining, crushing and transport of mafic or ultramafic rocks for accelerated silicate weathering, our focus...
Conference Paper
Full-text available
Trace-element imaging of white mica and columbite group minerals (CGM) reveals that the magmatic-hydrothermal transition during the formation of late-orogenic anatectic [1] lithium-caesium-tantalum-enriched (LCT) pegmatites of Leinster, SE Ireland, can be described by a three-stage process [2]. The first stage is characterized by crystallization fr...
Poster
Crushed basalt (waste ‘quarry dust’) can reduce atmospheric CO2 when applied to soils because: (a) Silicate weathering consumes protons from soil acids, releases Ca2+ and Mg2+ in soil solutions and runoff, increases pH and favours carbonate precipitation in the oceans (Hartman et al., 2013). (b) Basalt quarry dust can act as a soil fertilizer (e.g....
Article
Full-text available
The processes involved in the magmatic–hydrothermal transition in rare-element pegmatite crystallization are obscure, and the role of hydrothermal mechanisms in producing economic concentrations of rare elements such as tantalum remains contentious. To decipher the paragenetic information encoded in zoned minerals crystallized during the magmatic–h...
Thesis
Full-text available
Pegmatites are well known for their unusual and fascinating mineralogy and textures, as well as for their pronounced economic importance as hosts of high-purity industrial minerals and rare metals. As industry develops a growing range of high-technology products containing rare elements, many of which are found in pegmatitic deposits, interest in u...
Conference Paper
Full-text available
High technology metals such as lithium and tantalum are commonly hosted in pegmatites, leading to renewed interest in understanding their origin. Obtaining accurate and precise results from pegmatites can be challenging. We have applied a newly developed laser ablation Rb-Sr dating method using reaction gases in a quadrupole ICP-MS to spodumene peg...
Poster
Full-text available
The Leinster pegmatite belt in SE Ireland occurs within the East Carlow Deformation Zone and comprises subvertical dykes of spodumene and spodumene-free pegmatites that intrude the eastern margin of the ~400 Ma S-type Leinster Granite, minor granitic intrusions and Lower Palaeozoic metasedimentary rocks. To investigate the origin of these pegmatite...
Article
Rare-element pegmatites have diverse chemical signatures and are important sources of strategic metals such as Li, Cs, and Ta. The two main hypotheses to explain rare-element pegmatite formation are (1) residual magmas from the crystallization of granitic rocks, and (2) partial melts from a relatively rare-element-rich source. In southeast Ireland,...
Conference Paper
Full-text available
Rare element pegmatites are important sources of strategic metals such as Li-Cs-Ta and are represented by a large diversity of chemical signatures. The mechanisms to form such unusual rocks are still being debated. We investigated whole rock and mineral geochemistry of spodumene (Li-pyroxene) pegmatites and associated rocks in southeast Ireland to...
Thesis
Full-text available
The Socorro-Guaxupé Thrust Nappe (SGTN) is part of meridional Brasília Belt, southeast Brazil, and represents important association of medium to high grade metamorphic rocks and granitoids. It is constituted, from base to top, by granulite unit (BGU), diatexite unit (IDU) and metatexite unit (SMU). In Paraguaçu region, southern Minas Gerais, are de...
Conference Paper
Full-text available
RESUMO: No sul de Minas Gerais está exposta a porção basal da Nappe Socorro-Guaxupé, em que rochas formadas na base da crosta continental estão expostas, sendo estas granulitos e migmatitos. Na região entre Paraguaçu e Machado ocorrem diatexitos com proporção variável de leucossoma, de aspecto ígneo, e paleossoma caracterizado por biotita-hornblend...

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Projects

Projects (5)
Project
LIBS-SCReeN is devoted to the optimisation and application of Laser-Induced Breakdown Spectroscopy (LIBS) techniques for multiscale detection and characterisation of Critical Raw Materials (CRM), with emphasis on the Belgian zinc-lead (Zn-Pb) deposits. This type of mineralisation is known worldwide to potentially host elements such as germanium (Ge), gallium (Ga) and cadmium (Cd), increasingly demanded for the development of green energy technologies and therefore often with high criticality. Of equal importance is the fact that many elements in these deposits can turn into contaminants for the environment as a result of their mining and beneficiation, including Zn-Pb and others such as arsenic (As) and thallium (Tl). LIBS offers a highly flexible, rapid and reliable measurement technique to enhance our capacity of pollutant-free CRM exploration and exploitation in various environments, including the recycling industry. The techniques also have large potential for remote environmental monitoring of ancient mining and industrial sites.
Project
The structural setting of the Leinster batholiths and associated smaller intrusive bodies as well as the role of regional East Carlow Deformation Zone in magma emplacment are not well understood. This project seeks to collect, review and condense the extensive data on the region from the last 40+ years to assess their implications especially in the light of recent models for magmatic intrusion and deformation.
Archived project
The GeoConnect³d project develops and tests a new methodological approach to prepare and disclose geological information for policy support and subsurface management. The improved approach uses two regional case studies – the Roer-to-Rhine region and the Pannonian Basin. These regional, cross-border case studies are chosen to be complementary and sufficiently different in geological setting and degree of implementation of subsurface exploitation and management, in order to maximize their pan-European relevance. A novel bottom-up approach introduces two concepts that increase the geological understanding of an area and are aimed at providing a coherent geological context for evaluating subsurface applications and resolving subsurface management issues. The first new concept is the structural framework as a means of joining existing models of different scale and resolution to clarify the importance of planar structures in a way that makes the geology understandable to stakeholders involved in subsurface management. The second concept is that of geomanifestations. These specific expressions of geological processes are important sources of information for improving geological understanding. The structural framework models annotated with geomanifestations allow the integration and evaluation of complex cross-thematic research. The two bottom-up regional case studies form the study material for a top-down, more generic evaluation of potentially interacting subsurface activities that allows revisiting and refining state-of-the-art methods. Valorisation of regional results at pan-European level is ensured by testing the methodologies in two smaller pilot areas in Germany and Ireland.