Kirunavaara is also the site that has given the ore its name, the Kiruna types of apatite iron ore, a name that is used internationally. In many places around the world, such as Chile and Sweden, copper and gold have also been found near certain iron ores, a fact that has led researchers from Luleå University of Technology in Sweden to believe that these “big three" were formed at the same time, deep down in the crust of the earth.
At Tjärrojåkka, about fifty kilometers west southwest of Kiruna, the Geological Survey of Sweden (SGU) found an iron deposit in the mid 1960s, and a few years later a nearby copper/gold mineralization was discovered. No mining ever took place since the deposit was too small to be profitable, but all the informationdrill cores, protocols, and analysis resultsare preserved at the SGU information office in Malå. Tjärrojåkka is the best Swedish example of proximate iron and copper/gold finds and has therefore been used as the object of study in Åsa Edfelt’s doctoral dissertation, which she will defend at Luleå University of Technology on May 25.
“The point of departure for my studies has been to examine whether iron ores and copper/gold ores can be formed during one and the same ore-formation event, and to identify properties in them that can be used for prospecting both in Sweden and abroad," says Åsa Edfelt.
“I have carried out comparative studies of age, chemical characteristics of minerals, formation temperatures, and the consistency of the ore-forming solutions in these two finds at Tjärrojåkka and found that they were formed during one and the same event."
In her research, Åsa Edfelt has also shown that the mineral apatite could possibly be used to determine what types of iron ore are lead to copper. The findings are of great significance to the prospecting market, which is currently red hot both in Sweden and in other parts of the world. Some 50 iron deposits are already known in northern Sweden and may also be of interest when it comes to copper and gold.Brief wordlist
Ore-naturally occurring mineral concentration containing metal that is economically worth extracting
Mineralization-name of the mineral concentration
Lena Edenbrink | alfa
Climate change weakens Walker circulation
20.10.2017 | MARUM - Zentrum für Marine Umweltwissenschaften an der Universität Bremen
Shallow soils promote savannas in South America
20.10.2017 | Senckenberg Forschungsinstitut und Naturmuseen
University of Maryland researchers contribute to historic detection of gravitational waves and light created by event
On August 17, 2017, at 12:41:04 UTC, scientists made the first direct observation of a merger between two neutron stars--the dense, collapsed cores that remain...
Seven new papers describe the first-ever detection of light from a gravitational wave source. The event, caused by two neutron stars colliding and merging together, was dubbed GW170817 because it sent ripples through space-time that reached Earth on 2017 August 17. Around the world, hundreds of excited astronomers mobilized quickly and were able to observe the event using numerous telescopes, providing a wealth of new data.
Previous detections of gravitational waves have all involved the merger of two black holes, a feat that won the 2017 Nobel Prize in Physics earlier this month....
Material defects in end products can quickly result in failures in many areas of industry, and have a massive impact on the safe use of their products. This is why, in the field of quality assurance, intelligent, nondestructive sensor systems play a key role. They allow testing components and parts in a rapid and cost-efficient manner without destroying the actual product or changing its surface. Experts from the Fraunhofer IZFP in Saarbrücken will be presenting two exhibits at the Blechexpo in Stuttgart from 7–10 November 2017 that allow fast, reliable, and automated characterization of materials and detection of defects (Hall 5, Booth 5306).
When quality testing uses time-consuming destructive test methods, it can result in enormous costs due to damaging or destroying the products. And given that...
Using a new cooling technique MPQ scientists succeed at observing collisions in a dense beam of cold and slow dipolar molecules.
How do chemical reactions proceed at extremely low temperatures? The answer requires the investigation of molecular samples that are cold, dense, and slow at...
Scientists from the Max Planck Institute of Quantum Optics, using high precision laser spectroscopy of atomic hydrogen, confirm the surprisingly small value of the proton radius determined from muonic hydrogen.
It was one of the breakthroughs of the year 2010: Laser spectroscopy of muonic hydrogen resulted in a value for the proton charge radius that was significantly...
17.10.2017 | Event News
10.10.2017 | Event News
10.10.2017 | Event News
20.10.2017 | Information Technology
20.10.2017 | Materials Sciences
20.10.2017 | Interdisciplinary Research