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ZTEM in Deep Brownfield Exploration in OutokumpuNormal access

Author: M. Nousiainen
Event name: 2nd Conference on Geophysics for Mineral Exploration and Mining
Session: Advances in Airborne Electromagnetic and Magnetic Methods
Publication date: 09 September 2018
DOI: 10.3997/2214-4609.201802692
Organisations: EAGE
Language: English
Info: Extended abstract, PDF ( 2.23Mb )
Price: € 20

Summary:
Geological Survey of Finland (GTK) ordered a ZTEM (Z-Axis Tipper Electromagnetic) survey from Geotech Ltd. as a part of its Developing Mining Camp Exploration Concepts and Technologies – Brownfield Exploration Project. The project took place in Outokumpu Mining District in North Karelia in Eastern Finland and was conducted by the Geological Survey of Finland and the University of Helsinki together. The Outokumpu Cu-Co-Zn-Ni-Ag-Au ore belt is historical mining area where there has been exploration for over hundred years. The goal of the project was to develop new deep exploration concepts when working in previously explored and exploited mining area (brownfield) in crystalline bedrock areas. Among other geophysical surveys, ZTEM survey aimed at gathering information from the depth of several kilometers. The contractor also provided 2D and 3D inversions which combined with other data sets. In this abstract, the ZTEM data is compared to GTK’s own airborne electromagnetic data.


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