The tectonics and mineralisation of the Black Angel Pb/Zn deposit, central West Greenland ...

• Main Author: Carmichael, Andrew John
• Format: Doctoral or Postdoctoral Thesis
• Language: unknown
• Published: Goldsmiths, University of London 1988
• Subjects: Greenland
• Online Access: https://dx.doi.org/10.25602/gold.00033732; https://research.gold.ac.uk/id/eprint/33732

The 13.5 M Tonne Black Angel Zn-Pb-A/J-Fe deposit at Marmorilik, West Greenland (71·10' N, 51· 045' W) consists of six massive, strata bound to discordant sulphide lenses hosted in poly-deformed, poly-metamorphosed evaporite bearing carbonates of the Early Proterozoic Upper Marmorilik Formation. This study is an analysis of the tectonics and mineralisation of the orebodies. The research programmed involved detailed and regional structural and stratigraphic mapping, section measuring, extensive underground mapping and sampling, logging of drill cores, detailed mineralogical and textural studies, and stable and lead isotopic analyses. The deposits occur within the Karrat Group supracrustal sequence of the Mid-Proterozoic (1860 -1680 ma. )Rinkian mobile belt, an upper greenschist to granulite facies terrain composed of Archean and Early Proterozoic tectono-stratigraphic units. Four deformation phases have been recognised within the supracrustal of the Marmorilik and Nukavsak Formations. Three penetrative phases ...