Geological map of the Rinkian fold and thrust belt (Palaeoproterozoic, West Greenland)

The Rinkian fold and thrust belt lies to the north of the Nagssugtoqidian orogen in West Greenland between latitudes 69°30´N and 75°N. North of Nuussuaq it is characterised by the presence of a several kilometers thick Palaeoproterozoic sedimentary succession, the Karrat Group, which overlies and is interfolded with Archaean gneisses and supracrustal rocks. The Paleoproterozoic Karrat Group of West Greenland hosts one of the few deposits that have been mined in Greenland, the Black Angel Zn-Pb mine. However, a study of the whole extent of the Karrat Group has not been carried out since it was first mapped in the 1960s. The fieldwork program, which took place between 2015 and 2017, aimed at contributing towards the evaluation of the mineral potential of the Karrat Group, through an updated and integrated approach, supporting a detailed understanding of the mineral system(s). During three shipbased field seasons fully supported by a helicopter, the entire Karrat area was flown for the acquisition of oblique photos for 3D-photogeology and most of it was covered by new field mapping, observations and ground control. The collected geochronology, stratigraphy, geochemistry, structural geology and economic geology data, together with 3D-photogeology, improved the understanding of the complex tectonic evolution of the region, and has allowed the revision of the stratigraphy and lastly the production of three new geological maps of the area at 1:100.000 scale: Maarmorilik, Nugaastsiaq and Pannertooq map sheets. Together with the GEUS map series production, there will be also a web-GIS version of the geological maps
will also be published.