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  • 9 - Proposed Drilling into Postglacial Faults

  • from Part II - Methods and Techniques for Fault Identification and Dating
  • Edited by Holger Steffen, Odleiv Olesen, Raimo Sutinen
  • Book:
    Glacially-Triggered Faulting
    Published online:
    02 December 2021
    Print publication:
    16 December 2021, pp 151-174

  • Summary

    Postglacial faults in northern Fennoscandia have been investigated through geophysical methods, trenching, and mapping of brittle deformation structures. Very little is known about postglacial faults through direct measurements. A few short, up to 500 m deep, boreholes exist. Plans for a scientific drilling program were initiated in 2010. The drilling target has been identified: The Pärvie Fault system is the longest known postglacial fault in the world and has been proposed to have hosted an M8 earthquake near the end or just after the last glaciation. Further, this fault system is still microseismically active. The drill sites are north of the Arctic Circle, in a sparsely populated area. Existing site survey data, established logistics, and societal relevance through the fault’s proximity to mining and energy operations make this fault system an appropriate target. The International Continental Scientific Drilling Program approved a full drilling proposal in October 2019. This chapter presents an abbreviated version of the approved proposal.