The electrical conductivity structure beneath the Koillismaa-Näränkävaara complex in northern Finland ...

• Main Authors: Patzer, Cedric, Autio, Uula, Kamm, Jochen
• Format: Conference Object
• Language: unknown
• Published: GFZ German Research Centre for Geosciences 2023
• Subjects: Koillismaa; Northern Finland
• Online Access: https://dx.doi.org/10.57757/iugg23-1875; https://gfzpublic.gfz-potsdam.de/pubman/item/item_5017702

<!--!introduction!--> The Koillismaa-Näränkävaara complex in North-eastern Finland is currently studied with a variety of geophysical and geochemical investigations to better understand its geological history and assess its mineral potential. The area is characterized by an East-West oriented deeply seated ultramafic intrusion within the granitoid bedrock which has been indicated by gravity and magnetic anomalies as well as 2D inversion of sparse magnetotelluric (MT) data. It was successfully drilled at a depth of 1.5 km by the Koillismaa Deep Hole. The aim of this study is to better delineate the geological structure around the Koillismaa Deep Hole area. We collected 70 MT sites along an approximately 40 km long profile across the intrusion. In addition, we also tested our newly acquired EM transmitter and collected a densely sampled controlled source AMT (CSAMT) profile across the Koillismaa Deep Hole at the centre of the MT profile. Data analysis of the MT data shows prominent geoelectrical strike ... : The 28th IUGG General Assembly (IUGG2023) (Berlin 2023) ...