Petrography, Geochemistry and Genesis of the Skiftesmyr Cu-Zn VMS- Deposit, Grong, Norway
FACULTY OF SCIENCE AND TECHNOLOGY DEPARTMENT OF GEOLOGY Petrography, geochemistry and genesis of the Skiftesmyr Cu-Zn VMS- deposit, Grong, Norway Kristoffer Jøtne Walsh GEO-3900 Master’s Thesis in Geology November 2013 GEO-3900 Master’s Thesis in Geology PETROGRAPHY, GEOCHEMISTRY AND GENESIS OF THE SKIFTESMYR CU-ZN VMS-DEPOSIT, GRONG, NORWAY Kristoffer Jøtne Walsh Department of Geology, UiT – The Arctic University of Norway, November, 2013 2 3 Acknowledgements I wish to thank my supervisors, Professor Kåre V. Kullerud and Perry O. Kaspersen, former CEO and Country Manager of MetPro AS, for all their help and comments, and MetPro AS for making this thesis possible. I would also like to thank Professor Erling Krogh Ravna for assistance with the XRF analyses, and express my gratitude to former MetPro AS geologist Stefan Winterhoff for assistance with field work, and Per Samskog, MetPro AS exploration geologist, for MapInfo tutoring. Last, but not least, I would like to thank my family, friends and fellow students for their support and encouragement. Kristoffer Jøtne Walsh Tromsø, Nov. 2013 4 5 Abstract The Skiftesmyr Cu-Zn VMS-deposit is located in the Grong municipality of Northern Trøndelag, Norway. The mineralization has been known since at least 1903, when mention of small workings in the area were first published, and has later been the subject of several exploration projects by different companies, of which MetPro AS is the latest. The Skiftesmyr deposit is a part of the Gjersvik Nappe, which is a part of the Köli Nappe Complex, which in turn is a part of the Upper Allochthon of the Scandinavian Caledonides, and is likely of Mid- Ordovician age.
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