Drone-based magnetic and multispectral surveys to develop a 3D model for mineral exploration at Qullissat, Disko Island, Greenland
Mineral exploration in the West Greenland flood basalt province is attractive because of its resemblance to the magmatic sulfide-rich deposit in the Russian Norilsk region, but it is challenged by rugged topography and partly poor exposure for relevant geologic formations. On northern Disko Island,...
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Copernicus Publications
2022
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Online Access: | https://hdl.handle.net/11250/3044853 https://doi.org/10.5194/se-13-793-2022 |
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ftntnutrondheimi:oai:ntnuopen.ntnu.no:11250/3044853 2023-05-15T16:28:43+02:00 Drone-based magnetic and multispectral surveys to develop a 3D model for mineral exploration at Qullissat, Disko Island, Greenland Jackisch, Robert Heincke, Björn H. Zimmermann, Robert Sørensen, Erik V. Pirttijärvi, Markku Kirsch, Moritz Salmirinne, Heikki Lode, Stefanie Kuronen, Urpo Gloaguen, Richard 2022 application/pdf https://hdl.handle.net/11250/3044853 https://doi.org/10.5194/se-13-793-2022 eng eng Copernicus Publications Solid Earth (SE). 2022, 13 (4), 793-825. urn:issn:1869-9510 https://hdl.handle.net/11250/3044853 https://doi.org/10.5194/se-13-793-2022 cristin:2030903 Navngivelse 4.0 Internasjonal http://creativecommons.org/licenses/by/4.0/deed.no CC-BY 793-825 13 Solid Earth (SE) 4 Peer reviewed Journal article 2022 ftntnutrondheimi https://doi.org/10.5194/se-13-793-2022 2023-01-25T23:43:08Z Mineral exploration in the West Greenland flood basalt province is attractive because of its resemblance to the magmatic sulfide-rich deposit in the Russian Norilsk region, but it is challenged by rugged topography and partly poor exposure for relevant geologic formations. On northern Disko Island, previous exploration efforts have identified rare native iron occurrences and a high potential for Ni–Cu–Co–PGE–Au mineralization. However, Quaternary landslide activity has obliterated rock exposure in many places at lower elevations. To augment prospecting field work under these challenging conditions, we acquire high-resolution magnetic and multispectral remote sensing data using drones in the Qullissat area. From the data, we generate a detailed 3D model of a mineralized basalt unit, belonging to the Asuk Member of the Palaeocene Vaigat Formation. Different types of legacy data and newly acquired geo- and petrophysical as well as geochemical-mineralogical measurements form the basis of an integrated geological interpretation of the unoccupied aerial system (UAS) surveys. In this context, magnetic data aim to define the location and the shape of the buried magmatic body, and to estimate if its magnetic properties are indicative for mineralization. UAS-based multispectral orthomosaics are used to identify surficial iron staining, which serves as a proxy for outcropping sulfide mineralization. In addition, UAS-based digital surface models are created for geomorphological characterization of the landscape to accurately reveal landslide features. UAS-based magnetic data suggest that the targeted magmatic unit is characterized by a pattern of distinct positive and negative magnetic anomalies. We apply a 3D magnetization vector inversion (MVI) model to the UAS-based magnetic data to estimate the magnetic properties and shape of the magmatic body. By means of introducing constraints in the inversion, (1) UAS-based multispectral data and legacy drill cores are used to assign significant magnetic properties to areas that ... Article in Journal/Newspaper Greenland norilsk NTNU Open Archive (Norwegian University of Science and Technology) Asuk ENVELOPE(-53.333,-53.333,70.217,70.217) Greenland Norilsk ENVELOPE(88.203,88.203,69.354,69.354) Qullissat ENVELOPE(-53.017,-53.017,70.083,70.083) Vaigat ENVELOPE(-52.947,-52.947,70.200,70.200) Solid Earth 13 4 793 825 |
institution |
Open Polar |
collection |
NTNU Open Archive (Norwegian University of Science and Technology) |
op_collection_id |
ftntnutrondheimi |
language |
English |
description |
Mineral exploration in the West Greenland flood basalt province is attractive because of its resemblance to the magmatic sulfide-rich deposit in the Russian Norilsk region, but it is challenged by rugged topography and partly poor exposure for relevant geologic formations. On northern Disko Island, previous exploration efforts have identified rare native iron occurrences and a high potential for Ni–Cu–Co–PGE–Au mineralization. However, Quaternary landslide activity has obliterated rock exposure in many places at lower elevations. To augment prospecting field work under these challenging conditions, we acquire high-resolution magnetic and multispectral remote sensing data using drones in the Qullissat area. From the data, we generate a detailed 3D model of a mineralized basalt unit, belonging to the Asuk Member of the Palaeocene Vaigat Formation. Different types of legacy data and newly acquired geo- and petrophysical as well as geochemical-mineralogical measurements form the basis of an integrated geological interpretation of the unoccupied aerial system (UAS) surveys. In this context, magnetic data aim to define the location and the shape of the buried magmatic body, and to estimate if its magnetic properties are indicative for mineralization. UAS-based multispectral orthomosaics are used to identify surficial iron staining, which serves as a proxy for outcropping sulfide mineralization. In addition, UAS-based digital surface models are created for geomorphological characterization of the landscape to accurately reveal landslide features. UAS-based magnetic data suggest that the targeted magmatic unit is characterized by a pattern of distinct positive and negative magnetic anomalies. We apply a 3D magnetization vector inversion (MVI) model to the UAS-based magnetic data to estimate the magnetic properties and shape of the magmatic body. By means of introducing constraints in the inversion, (1) UAS-based multispectral data and legacy drill cores are used to assign significant magnetic properties to areas that ... |
format |
Article in Journal/Newspaper |
author |
Jackisch, Robert Heincke, Björn H. Zimmermann, Robert Sørensen, Erik V. Pirttijärvi, Markku Kirsch, Moritz Salmirinne, Heikki Lode, Stefanie Kuronen, Urpo Gloaguen, Richard |
spellingShingle |
Jackisch, Robert Heincke, Björn H. Zimmermann, Robert Sørensen, Erik V. Pirttijärvi, Markku Kirsch, Moritz Salmirinne, Heikki Lode, Stefanie Kuronen, Urpo Gloaguen, Richard Drone-based magnetic and multispectral surveys to develop a 3D model for mineral exploration at Qullissat, Disko Island, Greenland |
author_facet |
Jackisch, Robert Heincke, Björn H. Zimmermann, Robert Sørensen, Erik V. Pirttijärvi, Markku Kirsch, Moritz Salmirinne, Heikki Lode, Stefanie Kuronen, Urpo Gloaguen, Richard |
author_sort |
Jackisch, Robert |
title |
Drone-based magnetic and multispectral surveys to develop a 3D model for mineral exploration at Qullissat, Disko Island, Greenland |
title_short |
Drone-based magnetic and multispectral surveys to develop a 3D model for mineral exploration at Qullissat, Disko Island, Greenland |
title_full |
Drone-based magnetic and multispectral surveys to develop a 3D model for mineral exploration at Qullissat, Disko Island, Greenland |
title_fullStr |
Drone-based magnetic and multispectral surveys to develop a 3D model for mineral exploration at Qullissat, Disko Island, Greenland |
title_full_unstemmed |
Drone-based magnetic and multispectral surveys to develop a 3D model for mineral exploration at Qullissat, Disko Island, Greenland |
title_sort |
drone-based magnetic and multispectral surveys to develop a 3d model for mineral exploration at qullissat, disko island, greenland |
publisher |
Copernicus Publications |
publishDate |
2022 |
url |
https://hdl.handle.net/11250/3044853 https://doi.org/10.5194/se-13-793-2022 |
long_lat |
ENVELOPE(-53.333,-53.333,70.217,70.217) ENVELOPE(88.203,88.203,69.354,69.354) ENVELOPE(-53.017,-53.017,70.083,70.083) ENVELOPE(-52.947,-52.947,70.200,70.200) |
geographic |
Asuk Greenland Norilsk Qullissat Vaigat |
geographic_facet |
Asuk Greenland Norilsk Qullissat Vaigat |
genre |
Greenland norilsk |
genre_facet |
Greenland norilsk |
op_source |
793-825 13 Solid Earth (SE) 4 |
op_relation |
Solid Earth (SE). 2022, 13 (4), 793-825. urn:issn:1869-9510 https://hdl.handle.net/11250/3044853 https://doi.org/10.5194/se-13-793-2022 cristin:2030903 |
op_rights |
Navngivelse 4.0 Internasjonal http://creativecommons.org/licenses/by/4.0/deed.no |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.5194/se-13-793-2022 |
container_title |
Solid Earth |
container_volume |
13 |
container_issue |
4 |
container_start_page |
793 |
op_container_end_page |
825 |
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1766018390441328640 |