The norite belt in the Mesoarchaean Maniitsoq structure, southern West Greenland: conduit-type Ni-Cu mineralisation in impact-triggered, mantle-derived intrusions?

Authors

  • Adam A. Garde Geological Survey of Denmark and Greenland, Øster Voldgade 10, DK-1350 Copenhagen K. Denmark
  • John Pattison North American Nickel Inc., 301–260 W. Esplanade, North Vancouver, BC V7M 3G7, Canada
  • Thomas F. Kokfelt Geological Survey of Denmark and Greenland, Øster Voldgade 10, DK-1350 Copenhagen K. Denmark
  • Iain McDonald School of Earth and Ocean Sciences, Cardiff University, P.O. Box 914, Cardiff CF10 3YE, UK
  • Karsten Secher Geological Survey of Denmark and Greenland, Øster Voldgade 10, DK-1350 Copenhagen K. Denmark

DOI:

https://doi.org/10.34194/geusb.v28.4722

Abstract

With the recent discovery of the giant, deeply eroded, 3 Ga Maniitsoq impact structure in southern West Greenland (Garde 2010), an enigmatic, c. 75 by 15 km large, curvilinear belt of undeformed norite intrusions with Ni-Cu mineralisation was re-interpreted as representing crustally contaminated melts derived from the mantle in the wake of the impact (Fig. 1; Garde et al. 2012). The norite belt (Nielsen 1976; Secher 1983) was discovered in the early 1960s by the mining and exploration company Kryolitselskabet Øresund A/S, and more than one hundred shallow exploration holes were drilled by the company in the period 1965–1971. The mineralisation has subsequently been investigated by Cominco Ltd., Falconbridge Ltd. and NunaMinerals A/S. In 2011, the re-interpretation of the norite belt, and recent availability of improved airborne geophysical exploration tools, prompted the Canadian company North American Nickel Inc. (NAN) to resume exploration.

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Published

2013-07-10

How to Cite

Garde, A. A., Pattison, J., Kokfelt, T. F., McDonald, I., & Secher, K. (2013). The norite belt in the Mesoarchaean Maniitsoq structure, southern West Greenland: conduit-type Ni-Cu mineralisation in impact-triggered, mantle-derived intrusions?. GEUS Bulletin, 28, 45–48. https://doi.org/10.34194/geusb.v28.4722

Issue

Section

RESEARCH ARTICLE | SHORT

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