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
Diving robots find Antarctic seas exhale surprising amounts of carbon dioxide in winter
16.08.2018 | National Science Foundation
Diving robots find Antarctic winter seas exhale surprising amounts of carbon dioxide
15.08.2018 | University of Washington
New design tool automatically creates nanostructure 3D-print templates for user-given colors
Scientists present work at prestigious SIGGRAPH conference
Most of the objects we see are colored by pigments, but using pigments has disadvantages: such colors can fade, industrial pigments are often toxic, and...
Scientists at the University of California, Los Angeles present new research on a curious cosmic phenomenon known as "whistlers" -- very low frequency packets...
Scientists develop first tool to use machine learning methods to compute flow around interactively designable 3D objects. Tool will be presented at this year’s prestigious SIGGRAPH conference.
When engineers or designers want to test the aerodynamic properties of the newly designed shape of a car, airplane, or other object, they would normally model...
Researchers from TU Graz and their industry partners have unveiled a world first: the prototype of a robot-controlled, high-speed combined charging system (CCS) for electric vehicles that enables series charging of cars in various parking positions.
Global demand for electric vehicles is forecast to rise sharply: by 2025, the number of new vehicle registrations is expected to reach 25 million per year....
Proteins must be folded correctly to fulfill their molecular functions in cells. Molecular assistants called chaperones help proteins exploit their inbuilt folding potential and reach the correct three-dimensional structure. Researchers at the Max Planck Institute of Biochemistry (MPIB) have demonstrated that actin, the most abundant protein in higher developed cells, does not have the inbuilt potential to fold and instead requires special assistance to fold into its active state. The chaperone TRiC uses a previously undescribed mechanism to perform actin folding. The study was recently published in the journal Cell.
Actin is the most abundant protein in highly developed cells and has diverse functions in processes like cell stabilization, cell division and muscle...
17.08.2018 | Event News
08.08.2018 | Event News
27.07.2018 | Event News
17.08.2018 | Physics and Astronomy
17.08.2018 | Information Technology
17.08.2018 | Life Sciences