Fluid and metal sources in the Fäboliden hypozonal orogenic gold deposit, Sweden

To model the formation of orogenic gold deposits, in a global perspective, it is important to understand the ore-forming conditions not only for deposits hosted in greenschist facies rocks but also in amphibolite facies. The Paleoproterozoic Fäboliden deposit in northern Sweden belongs to the globally rare hypozonal group of orogenic gold deposits and, as such, constitutes a key addition to the understanding of amphibolite facies orogenic gold deposits. The Fäboliden deposit is characterized by auriferous arsenopyrite-rich quartz veins, hosted by amphibolite facies supracrustal rocks and controlled by a roughly N-striking shear zone. Gold is closely associated with arsenopyrite-löllingite and stibnite, and commonly found in fractures and as inclusions in the arsenopyrite-löllingite grains. The timing of mineralization is estimated from geothermometric data and field relations at c. 1.8 Ga. In order to constrain the origin of gold-bearing fluids in the Fäboliden deposit, oxygen, hydrogen, and sulfur isotope studies were undertaken. δ18O from quartz in veins shows a narrow range of + 10.6 to + 13.1‰. δD from biotite ranges between − 120 and − 67‰, with most data between − 95 and − 67‰. δ34S in arsenopyrite and pyrrhotite ranges from − 0.9 and + 3.6‰ and from − 1.5 and + 1.9‰, respectively. These stable isotope data, interpreted in the context of the regional and local geology and the estimated timing of mineralization, suggest that the sulfur- and gold-bearing fluid was generated from deep-crustal sedimentary rocks during decompressional uplift, late in the orogenic evolution of the area. At the site of gold ore formation, an 18O-enriched magmatic fluid possibly interacted with the auriferous fluid, causing precipitation of Au and the formation of the Fäboliden hypozonal orogenic gold deposit

ERA-MIN Research Agenda

European Research Area - Network on the Industrial Handling of Raw Materials for European Industriesroadmap of the "ERA-MIN" eranetNon-energy and non-agricultural raw materials underpin the global economy and our quality of life. They are vital for the EU's economy and for the development of environmentally friendly technologies essential to European industries. However, the EU is highly dependent on imports, and securing supplies has therefore become crucial. A sustainable supply of mineral products and metals for European industry requires a more efficient and rational consumption, enhanced substitution and improved recycling. Recycling from scrap to raw materials has been rapidly gaining in quantity and efficiency over the last years. However, continuous re-use cannot provide alone the necessary quantities of mineral raw materials, due to i) recycling losses, ii) the worldwide growing demand in raw materials, and iii) the need of "new" elements for the industry. To fully meet future needs, metals and mineral products from primary sources will still be needed in the future. Most of them will continue to be imported from sources outside Europe; but others can, and should, be produced domestically. Advanced research and innovation are required to improve the capacity of existing technologies to discover new deposits, to improve the efficiency of the entire geomaterials life cycle from mineral extraction to the use as secondary resource of products at the end of their industrial life, and to reduce the environmental footprint of raw materials extraction and use. Research and innovation must be made to acquire knowledge as well, and to improve our basic understanding of all engineering and natural processes involved in the raw materials life cycle, as well as the coupling of these processes. Finally, research has to go beyond the present-day economic and technological constraints, and it should be closely associated with training and education in order to maintain existing skills and to share the most recent developments with the industrial sector. A long-term vision of research is necessary in order to have the capacity of evaluating the environmental and societal impacts of present and developing industrial activities and to imagine tomorrow's breakthrough concepts and technologies that will create new industrial opportunities. These objectives require the input of contrasted scientific and technical skills and competences (earth science, material science and technology, chemistry, physics, engineer, biology, engineering, environmental science, economy, social and human sciences, etc). An important challenge is to gather all these domains of expertise towards the same objective. The ERA-MIN Research Agenda aims at listing the most important topics of research and innovation that will contribute to i) secure the sustainable supply and management of non-energy and non-agricultural raw materials, and ii) offer opportunities of investment and employment opportunities in the EU

A review of Palaeoproterozoic intrusive hosted Cu-Au-Fe-oxide deposits in northern Sweden

Godkänd; 2001; 20070427 (bajo

Geodynamic evolution of the Skellefte district : current ideas and problems

Godkänd; 2000; 20110414 (andbra

Ore forming processes in relation to the tectonic evolution of the Fennoscandian Shield

Godkänd; 2009; Bibliografisk uppgift: Invited talk; 20090609 (pawe

Människans behov av metaller

Med undantag för några få naturfolk som fortfarande lever avskilda från det moderna samhället kan man med fog säga att dagens människor mer eller mindre helt är beroende av utvinning av metaller, mineral, energiråvaror (kol, olja, gas) och ballastmaterial (grus, sand, makadam). Trots detta är det få verksamheter som har fått utstå så hård kritik under senare år som gruvindustrin. Ibland har kritiken varit befogad, men oftare har den varit felaktig och tendentiös och utpekat gruvindustrin som jordens miljöskurkar nummer ett. I denna artikel hoppas jag att nyansera bilden av den råvaruproducerande industrin något och att var och en, efter att ha läst artikeln, begrundar sin egen inställning till råvaruutvinning och hur man ur ett hållbarhetsperspektiv kan se på människans behov av metaller.Godkänd; 2006; 20061121 (bajo

NordMin 2013–2017 : A Nordic Network of Expertise for a Sustainable Mining and Mineral Industry Final Report

NordMin started in 2013 as a project under the auspices of the Nordic Council of Ministers with the aim to strengthen Nordic collaboration for a sustainable Mining and Minerals industry in the Nordic countries. NordMin was initiated by the Swedish chairmanship of the Nordic Council as a strategic initiative with a duration of 4 years. The project management has been hosted by Luleå University of Technology and a number of activities have been rolled out over the last few years. The aim of this report is to give a brief overview of NordMin activities and also to draw some final conclusions on what has been achieved in terms of a closer Nordic collaboration within the field and how we can benefit from this in the future

Stratiform-stratabound sulphide deposits

Godkänd; 2007; 20080103 (bajo