Next Article in Journal
Evidence of a Biological Control over Origin, Growth and End of the Calcite Prisms in the Shells of Pinctada margaritifera (Pelecypod, Pterioidea)
Previous Article in Journal
Particle Size-Specific Magnetic Measurements as a Tool for Enhancing Our Understanding of the Bulk Magnetic Properties of Sediments
Previous Article in Special Issue
Extremely Re-Rich Molybdenite from Porphyry Cu-Mo-Au Prospects in Northeastern Greece: Mode of Occurrence, Causes of Enrichment, and Implications for Gold Exploration
Article Menu

Export Article

Open AccessArticle
Minerals 2014, 4(4), 788-814; https://doi.org/10.3390/min4040788

The Distribution, Character, and Rhenium Content of Molybdenite in the Aitik Cu-Au-Ag-(Mo) Deposit and Its Southern Extension in the Northern Norrbotten Ore District, Northern Sweden

1
Division of Geosciences and Environmental Engineering, Luleå University of Technology, SE 971 87 Luleå, Sweden
2
Gunnarn Exploration AB, Blåvagen 207 Box 149, SE 923 23 Storuman, Sweden
3
Department of Earth Sciences, University of Durham, Durham DH1 3LE, UK
4
Department of Earth and Atmospheric Sciences, University of Houston, Houston, TX 77204-5007, USA
5
Exploration Department, Boliden Mineral AB, SE 936 81 Boliden, Sweden
6
Division of Process Technology, Boliden Mineral AB, SE 936 81 Boliden, Sweden
*
Author to whom correspondence should be addressed.
Received: 23 September 2014 / Revised: 21 November 2014 / Accepted: 24 November 2014 / Published: 1 December 2014
(This article belongs to the Special Issue Advances in Rhenium Mineralogy, Geochemistry and Industrial Uses)
View Full-Text   |   Download PDF [4717 KB, uploaded 1 December 2014]   |  

Abstract

Molybdenite in the Aitik deposit and its southern extension was studied through mineralogical/chemical analysis and laboratory flotation tests. It is demonstrated that molybdenite varies considerably in grain size, ranging from coarse (>20 μm) to very fine (<2 μm) and occurs predominantly as single grains in the groundmass of the rocks, as grain aggregates, and intergrown with chalcopyrite and pyrite. The dominating molybdenite-bearing rocks are the mica schists, the quartz-monzodiorite, and the Salmijärvi biotite-amphibole gneiss, the latter containing mostly medium-coarsegrained molybdenite. Later geological features, such as garnet-magnetite-anhydrite-K feldspar alteration and pegmatite dikes appear to be responsible for a significant part of the distribution pattern of molybdenite. Molybdenite grains contain up to 1587 ppm Re, with an average of 211 ± 10 ppm in Aitik molybdenite and 452 ± 33 ppm in Salmijärvi molybdenite. The higher Re concentrations are found in molybdenite associated with sericite- and quartz-amphibole-magnetite altered rocks, whereas low Re values occur in rocks in which potassic alteration is prominent. Molybdenite recovery is influenced by the mineralogy of the host rock and the alteration grade; hence both of these factors will have an impact on potential recoveries. The recovery of molybdenite was lower from flotation feeds with significant amounts of Mg-bearing clay-micas. View Full-Text
Keywords: Aitik deposit; northern Sweden; molybdenite; rhenium; QEMSCAN; dilution ICP-MS; mineral processing; ore characterization Aitik deposit; northern Sweden; molybdenite; rhenium; QEMSCAN; dilution ICP-MS; mineral processing; ore characterization
Figures

Figure 1

This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).
SciFeed

Share & Cite This Article

MDPI and ACS Style

Wanhainen, C.; Nigatu, W.; Selby, D.; McLeod, C.L.; Nordin, R.; Bolin, N.-J. The Distribution, Character, and Rhenium Content of Molybdenite in the Aitik Cu-Au-Ag-(Mo) Deposit and Its Southern Extension in the Northern Norrbotten Ore District, Northern Sweden. Minerals 2014, 4, 788-814.

Show more citation formats Show less citations formats

Related Articles

Article Metrics

Article Access Statistics

1

Comments

[Return to top]
Minerals EISSN 2075-163X Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert
Back to Top