Unravelling the Deformation of Paleoproterozoic Marbles and Zn-Pb Ore Bodies by Combining 3D-Photogeology and Hyperspectral Data (Black Angel Mine, Central West Greenland)
Abstract
:1. Introduction
2. Regional Geological Setting
2.1. The Mârmorilik Formation
2.2. Black Angel Mountain and Zn-Pb Ore Deposit
3. Methodology
3.1. 3D-Photogeology
3.2. Hyperspectral Data
4. Integrated Stratigraphy of the Black Angel Cliff Section
4.1. Drill-Core Stratigraphy
- (1)
- White Massive marble: massive, white to off-white and medium to coarse grained anhydrite-bearing marble.
- (2)
- Light-Grey Banded marble: Light-grey scapolite-bearing marble weakly foliated with light brown mica. Disseminated grey to pink fluorite is often conspicuous, defining a weak color banding.
- (3)
- Dark-Grey Banded Marble: Distinctly banded to well-banded marbles, fine- to medium grained with at least two distinct subunits (a) grey, fine- to medium grained, well banded containing chert fragments (chert-bearing marble) and (b) light grey to grey, fine-grained and diffusely banded marbles hosting the ore sulfides (ore-bearing unit).
- (4)
- Grey Banded Marble: Massive to weakly foliated Grey to dark grey, fine grained, marble with graphite. Exclusively seen as a transitional unit between marble and pelite units and interpreted to represent finely interbedded carbonate and pelite.
- (5)
- Pelite: Massive to finely laminated black, fine grained pelite often inter-banded with fine-grained, dark grey marble on mm- to several cm-scale. Pyrite and rare pyrrhotite is reported.
4.2. Hyperspectral Stratigraphy
4.3. RGB-Stratigraphy and Structures
5. Discussion
5.1. Fault-Propagation Folds and Ore Remobilization
5.2. An Updated Stratigraphic Model
6. Conclusions
- The stratigraphy: ore is confined within marbles of the carbonate platform (reservoir) below the carbonate slope and shales (cap rock);
Author Contributions
Funding
Data Availability Statement
Acknowledgments
Conflicts of Interest
References
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Guarnieri, P.; Thiele, S.T.; Baker, N.; Sørensen, E.V.; Kirsch, M.; Lorenz, S.; Rosa, D.; Unger, G.; Zimmermann, R. Unravelling the Deformation of Paleoproterozoic Marbles and Zn-Pb Ore Bodies by Combining 3D-Photogeology and Hyperspectral Data (Black Angel Mine, Central West Greenland). Minerals 2022, 12, 800. https://doi.org/10.3390/min12070800
Guarnieri P, Thiele ST, Baker N, Sørensen EV, Kirsch M, Lorenz S, Rosa D, Unger G, Zimmermann R. Unravelling the Deformation of Paleoproterozoic Marbles and Zn-Pb Ore Bodies by Combining 3D-Photogeology and Hyperspectral Data (Black Angel Mine, Central West Greenland). Minerals. 2022; 12(7):800. https://doi.org/10.3390/min12070800
Chicago/Turabian StyleGuarnieri, Pierpaolo, Sam T. Thiele, Nigel Baker, Erik V. Sørensen, Moritz Kirsch, Sandra Lorenz, Diogo Rosa, Gabriel Unger, and Robert Zimmermann. 2022. "Unravelling the Deformation of Paleoproterozoic Marbles and Zn-Pb Ore Bodies by Combining 3D-Photogeology and Hyperspectral Data (Black Angel Mine, Central West Greenland)" Minerals 12, no. 7: 800. https://doi.org/10.3390/min12070800