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Kampmann, Tobias ChristophORCID iD iconorcid.org/0000-0003-1867-2342
Alternative names
Publications (10 of 30) Show all publications
Bauer, T., Andersson, J. B. .. & Kampmann, T. C. (2019). Analysis of data from Unmanned Aerial Systems (UAS) in a Virtual Reality environment. In: Tobias C. Kampmann (Ed.), Proceedings of the Visual3D conference: . Paper presented at Visual3D conference 2019, 1–2 October, Uppsala, Sweden (pp. 19-19).
Open this publication in new window or tab >>Analysis of data from Unmanned Aerial Systems (UAS) in a Virtual Reality environment
2019 (English)In: Proceedings of the Visual3D conference / [ed] Tobias C. Kampmann, 2019, p. 19-19Conference paper, Oral presentation with published abstract (Refereed)
Abstract [en]

The use of Unmanned Aerial Systems (UAS) is getting increasingly popular for many different types of applications. The field of geology is slowly catching up resulting in new and innovative UAS solutions for various kinds of airborne measurement techniques. These techniques comprise a wide range of geophysical and remote sensing methods used to investigate the sub-surface. At Luleå University of Technology two different types of UAS are used in combination with a Virtual Reality environment in order to analyze geological structures and related ore deposits and mineralizations. The two UAS comprise a) a custom made quadrocopter (HUGIN) with a pay load of approx. 3.5 kg and an operational time of 5 times (batteries) maximum 35 minutes depending on payload, ambient temperatures and wind speed; and b) a foldable DJI Mavic Pro with an operational time of 3 times 30 minutes. The HUGIN system can be operated with a high-resolution optical camera for photogrammetry surveys and a 3-axial fluxgate magnetometer for measuring magnetic anomalies within bedrock and ultimately delineating geological structures. The system is highly flexible and a thermal camera is currently added to the system in order detect water fluxes in relation to geological structures or exothermal mineral processes. The DJI system is equipped with an optical camera for photogrammetric surveying and is a highly valuable tool in remote areas due to its lightweight and compact construction.Data acquired from both UAS is subsequently analysed in a Virtual Reality lab utilizing a 6m wide screen with active stereo functions. Photogrammetry data is first processed using the Aigsoft software package following a Structure for Motion (SfM) workflow where dense point cloud models and subsequently meshed and textured 3D surface models are produced. These models are then converted and transferred to the GeoVisionary software package that allows visualization of models in stereo 3D view. This allows digitizing geological structures such as foliation, fractures, and faults among others in an immersive 3D environment and provides an efficient tool complimentary to traditional field mapping. In particular, this makes it possible to capture and analyse data from hardly accessible and dangerous areas such as rock faces in open pits. Another complimentary method of data analysis comprises SCAT analysis of the meshed surfaces using the MOVE software package.

National Category
Geosciences, Multidisciplinary
Research subject
Ore Geology
Identifiers
urn:nbn:se:ltu:diva-76446 (URN)978-91-7790-474-8 (ISBN)
Conference
Visual3D conference 2019, 1–2 October, Uppsala, Sweden
Available from: 2019-10-18 Created: 2019-10-18 Last updated: 2019-10-18
Kampmann, T. C. & de la Varga, M. (2019). Field augmented reality for mineral exploration and mining: An upscaling project. In: Tobias C. Kampmann (Ed.), Proceedings of the Visual3D conference 2019, 1–2 October 2019, Uppsala, Sweden: Visualization of 3D/4D models in geosciences, exploration and mining. Paper presented at Visual3D conference 2019, 1–2 October 2019, Uppsala, Sweden (pp. 52-52). Luleå, Sweden: Luleå University of Technology
Open this publication in new window or tab >>Field augmented reality for mineral exploration and mining: An upscaling project
2019 (English)In: Proceedings of the Visual3D conference 2019, 1–2 October 2019, Uppsala, Sweden: Visualization of 3D/4D models in geosciences, exploration and mining / [ed] Tobias C. Kampmann, Luleå, Sweden: Luleå University of Technology, 2019, p. 52-52Conference paper, Oral presentation with published abstract (Refereed)
Abstract [en]

Currently, it is still common practice in the mining industry to display three-dimensional geological, geotechnical and resource data and models as 2D projections on maps, office computers and in written reports. This introduces uncertainties and time inefficiencies regarding data acquisition, interpretation and decision-making. The need in the mining and exploration industry for an improvement of these workflows, as well as for more objective and accurate data, facilitated quality control, as well as more cost-efficient and accurate exploration targeting, has been identified within the VIisual3D network of infrastructure (www.visual3d.info). The FARMIN project aims to develop an augmented reality (AR) solution that visualizes 3D geological data and allows exploration and mining professionals to modify models in the field.We aim to close an identified development gap in the visualization of geological data: the link of gathering data in-situ, updating the models and match virtual and real coordinates while exploring in the field or working in a mine site. We will close this gap in this project, by combining developments on highly efficient 3D geomodelling with state-of-the-art augmented reality (AR) hardware and software, as well as expertise in exploration and mining. The resulting solution will be a game changer for how geologists see and collect data and update their models in the field and in the mine.Augmented reality smartglasses (e.g. Microsoft HoloLens) enable users to interact with high-definition holograms in the real world. Microsoft Hololens, for example, allows users to view, control and interact with 3D content using their hands and voice. Field-compatible augmented reality solutions, including but not limited to Microsoft HoloLens technology, coupled with interactive IoT (internet of things) networks allow not only for the manipulation of holograms in a mock-up size, but even in real scale and location. Similar technology has been successfully established in other industrial sectors such as for construction and maintenance, resulting in increased efficiency, as well as reduced operating costs and working hours.The combination of geomodelling and AR technology will be based on GemPy, an open-source library for implicit geological modelling, developed by RWTH Aachen University, and rexOS, an AR-operating system, developed by Robotic Eyes GmbH. The remaining project consortium consists of two European mining and exploration companies (Boliden Mineral, MATSA Mining), as well as a major consulting company for the mining sector (DMT), a business development company (LTU Business) and a university partner with strong expertise in exploration and ore geology research (Luleå University of Technology). The project will kick off in January 2020 and run for three years. Continuous updates on the project progress will be published via the project homepage, as well as social media channels.

Place, publisher, year, edition, pages
Luleå, Sweden: Luleå University of Technology, 2019
National Category
Geosciences, Multidisciplinary
Research subject
Ore Geology
Identifiers
urn:nbn:se:ltu:diva-76445 (URN)978-91-7790-474-8 (ISBN)
Conference
Visual3D conference 2019, 1–2 October 2019, Uppsala, Sweden
Available from: 2019-10-18 Created: 2019-10-18 Last updated: 2019-10-22
Kampmann, T. C., Alvarenga, R. A. .., Sanjuan-Delmás, D. & Lindblom, M. (2019). Life cycle assessment of European copper mining: A case study from Sweden. In: Proceedings of the 15th SGA Biennial Meeting, 27-30 August 2019, Glasgow, Scotland: Life with Ore Deposits on Earth. Paper presented at 15th SGA Biennial Meeting 2019, Glasgow, Scotland (pp. 1577-1580). Society for Geology Applied to Mineral Deposits, 4
Open this publication in new window or tab >>Life cycle assessment of European copper mining: A case study from Sweden
2019 (English)In: Proceedings of the 15th SGA Biennial Meeting, 27-30 August 2019, Glasgow, Scotland: Life with Ore Deposits on Earth, Society for Geology Applied to Mineral Deposits , 2019, Vol. 4, p. 1577-1580Conference paper, Oral presentation with published abstract (Refereed)
Abstract [en]

The application of the life cycle assessment (LCA) methodology in the mining sector has the potential to evaluate the environmental sustainability of the primary production of metals. As part of a wider project on developing LCA models and methods for mining, life cycle inventory (LCI) data have been collected at two European copper-producing mine sites, Aitik (Sweden) and Cobre las Cruces (Spain). Results from Aitik, including their impact analysis, identify the use of diesel and explosives, the emission of sulfur dioxide, as well as nitrogen and other emissions in the upstream supply chain of explosives and electricity, as significant contributors to the environmental impact. These outputs have influence on the impact categories Climate Change, Photochemical Ozone Formation, Acidification, as well as Terrestrial and Marine Eutrophication. Due to the increasing incorporation of LCA into legislative demands on the mining sector, mining companies need to establish the necessary infrastructure and framework to be able to provide the required data in a fast, transparent and cost-efficient manner. For this reason, some recommendations to improve communication and data management within the companies have been established from the experience gained within this project.

Place, publisher, year, edition, pages
Society for Geology Applied to Mineral Deposits, 2019
National Category
Geosciences, Multidisciplinary
Research subject
Ore Geology
Identifiers
urn:nbn:se:ltu:diva-75801 (URN)978-0-85261-965-0 (ISBN)
Conference
15th SGA Biennial Meeting 2019, Glasgow, Scotland
Note

This publication is part of the EIT Raw Materials Upscaling Project "Sustainable management of primary raw materials through a better approach in Life Cycle Sustainability Assessment (SUPRIM)"

Available from: 2019-09-02 Created: 2019-09-02 Last updated: 2019-09-11Bibliographically approved
Kampmann, T. C. (2019). MINERS – Ett nätverk för doktorander inom gruv- och prospekteringsrelaterad forskning i Sverige. In: : . Paper presented at Bergforsk- och STRIMdagarna 2019, 15 – 16 maj 2019, Luleå..
Open this publication in new window or tab >>MINERS – Ett nätverk för doktorander inom gruv- och prospekteringsrelaterad forskning i Sverige
2019 (Swedish)Conference paper, Oral presentation only (Other academic)
National Category
Geosciences, Multidisciplinary
Research subject
Ore Geology
Identifiers
urn:nbn:se:ltu:diva-74295 (URN)
Conference
Bergforsk- och STRIMdagarna 2019, 15 – 16 maj 2019, Luleå.
Available from: 2019-06-10 Created: 2019-06-10 Last updated: 2019-07-26Bibliographically approved
Kampmann, T. C. (Ed.). (2019). Proceedings of the Visual3D conference 2019, 1–2 October 2019, Uppsala, Sweden: Visualization of 3D/4D models in geosciences, exploration and mining. Paper presented at Visual3D conference 2019, 1–2 October 2019, Uppsala, Sweden. Luleå: Luleå University of Technology
Open this publication in new window or tab >>Proceedings of the Visual3D conference 2019, 1–2 October 2019, Uppsala, Sweden: Visualization of 3D/4D models in geosciences, exploration and mining
2019 (English)Conference proceedings (editor) (Refereed)
Abstract [en]

Dear colleagues,

On behalf of the organizing committee of the Visual3D conference 2019, with the theme “Visualization of 3D/4D models in geosciences, exploration and mining”, I would like to present this proceedings document, containing all abstract contributions for which publication permission has been granted by the authors.

EIT Raw Materials is especially acknowledged as the main sponsor of this event through the Visual3D network of infrastructure.

We wish to thank all the contributors who through their efforts made this conference possible, and hope to see you all at a similar event in the near future.

Yours sincerely,

Tobias C. Kampmann, PhDConference coordinator, Visual3D conference 2019

Place, publisher, year, edition, pages
Luleå: Luleå University of Technology, 2019. p. 57
National Category
Geosciences, Multidisciplinary
Research subject
Ore Geology
Identifiers
urn:nbn:se:ltu:diva-76358 (URN)978-91-7790-474-8 (ISBN)
Conference
Visual3D conference 2019, 1–2 October 2019, Uppsala, Sweden
Available from: 2019-10-11 Created: 2019-10-11 Last updated: 2019-10-18Bibliographically approved
Garcia Uriarte, A., Menger, P., Garcia Zambrano, L., Alonso Galdames, A., Kampmann, T. C., Bark, G., . . . Heijungs, R. (2019). SUstainable management of PRIMary raw materials through a better approach in Life Cycle Sustainability Assessment (SUPRIM). In: : . Paper presented at Mining and Minerals Hall, 3rd edition, 15-17 October 2019, Sevilla, Spain.
Open this publication in new window or tab >>SUstainable management of PRIMary raw materials through a better approach in Life Cycle Sustainability Assessment (SUPRIM)
Show others...
2019 (English)Conference paper, Poster (with or without abstract) (Other academic)
Abstract [en]

The project focuses on the assessment of the environmental impact of raw materials production and the development of services to better understand sustainability issues in the sector. The main objectives of the project are:

• Development of a Life Cycle Impact Assessment (LCIA) method to address resource accessibility in sustainability assessment and testing and validatingthe method.

• Development of Life Cycle Inventory (LCI) datasets through case studies in collaboration with the industrial partners from the mining sector and apply anenvironmental assessment with the aim to better understand the environmental impacts of the production of copper and the sources of these impacts.

• Bring the service to a broader audience, including the LCIA community, mining companies and their downstream users, policy makers, academia.

Two case studies have been performed, the Cobre las Cruces mine in Spain, operated by First Quantum Minerals Ltd, as well as the Aitik mining operation innorthern Sweden, operated by Boliden Mineral AB.

National Category
Earth and Related Environmental Sciences
Research subject
Ore Geology
Identifiers
urn:nbn:se:ltu:diva-76427 (URN)
Conference
Mining and Minerals Hall, 3rd edition, 15-17 October 2019, Sevilla, Spain
Note

Part of the EIT RawMaterials upscaling project "SUPRIM"

Available from: 2019-10-18 Created: 2019-10-18 Last updated: 2019-10-18
Kampmann, T. C. & Bauer, T. (2019). The benefits of organized networking and matchmaking for the development of 3D/4D geomodel visualization. In: Tobias C. Kampmann (Ed.), Proceedings of the Visual3D conference 2019, 1–2 October, Uppsala, Sweden. Luleå University of Technology, 60 pages.: Visualization of 3D/4D models in geosciences, exploration and mining. Paper presented at Visual3D conference 2019, 1–2 October, Uppsala, Sweden (pp. 43-43). Luleå, Sweden: Luleå University of Technology
Open this publication in new window or tab >>The benefits of organized networking and matchmaking for the development of 3D/4D geomodel visualization
2019 (English)In: Proceedings of the Visual3D conference 2019, 1–2 October, Uppsala, Sweden. Luleå University of Technology, 60 pages.: Visualization of 3D/4D models in geosciences, exploration and mining / [ed] Tobias C. Kampmann, Luleå, Sweden: Luleå University of Technology, 2019, p. 43-43Conference paper, Oral presentation with published abstract (Refereed)
Abstract [en]

While huge territory of the EU shows a very high exploration potential and many EU countries remain attractive to investors (e.g. Fraser Institute, 2015), a mere 4% of global exploration expenditure is currently invested within European countries. One tool to trigger a higher degree of investment in exploration and to secure the domestic supply of both main commodities and critical raw materials (CRM) is to enhance our three-dimensional geometric understanding of the Earth’s crust.For these reasons, EIT Raw Materials decided to fund the Visual3D network of infrastructure (NoI) for three years (2017–2019). Visual3D involves to-date 14 partner organisations from nine EU countries. The NoI aims to integrate expertise within exploration and 3D modelling from industry, academia and research institutes, with the ambition to increase the understanding of geological bodies in 3D and 4D through improved visualisation techniques. The network believes firmly that the integration of novel visualization technologies (e.g. virtual and augmented reality) into workflows of exploration, mining and geoscientific research will bring a much-needed innovation boost to the European raw materials sector and increase its competitiveness.During its first year, Visual3D has compiled the network expertise and infrastructure regarding visualization tools available at the partner facilities. An overview of this infrastructure, as well as projects conducted by network partners is available on the Visual3D homepage (www.visual3d.info). The network also managed to identify common issues in the field of geomodelling, the solutions to which may be facilitated by a pan-European network approach, such as data compatibility, communication of geomodels, as well as complexity and variety of software. Subsequent years have been dedicated to the conceptualization of possible projects in order to solve the issues name above, as well as matchmaking to find expert consortia for these projects.So far, four workshops including project partners and invited external stakeholders have been held. Networking and matchmaking during these workshops has resulted in successful project proposals in the EIT RawMaterials KAVA calls for educational (MireBooks), as well as upscaling projects (FARMIN). Both these projects are presented at the Visual3D conference 2019. Further project ideas have been discussed within Visual3D and will be developed further.The benefits of organized networking in novel research and developments fields, such as visualization of 3D/4D models for exploration and geosciences, has become apparent during the lifetime of the Visual3D network. The network partners would encourage pan-European funding institutions such as EIT RawMaterials to provide continuous funding to similar networking initiatives, especially in highly innovative and novel research fields. Well-organized communication between different stakeholders is the basis of technological innovation and has the potential to give the European raw materials sector the leading edge in this highly competitive global market.

Place, publisher, year, edition, pages
Luleå, Sweden: Luleå University of Technology, 2019
National Category
Geosciences, Multidisciplinary
Research subject
Ore Geology
Identifiers
urn:nbn:se:ltu:diva-76441 (URN)978-91-7790-474-8 (ISBN)
Conference
Visual3D conference 2019, 1–2 October, Uppsala, Sweden
Available from: 2019-10-18 Created: 2019-10-18 Last updated: 2019-10-18
Kampmann, T. C., Jansson, N. F., Stephens, M. B., Olin, P. H., Gilbert, S. & Wanhainen, C. (2018). Syn-tectonic sulphide remobilization and trace element redistribution at the Falun pyritic Zn-Pb-Cu-(Au-Ag) sulphide deposit, Bergslagen, Sweden. Ore Geology Reviews, 96, 48-71
Open this publication in new window or tab >>Syn-tectonic sulphide remobilization and trace element redistribution at the Falun pyritic Zn-Pb-Cu-(Au-Ag) sulphide deposit, Bergslagen, Sweden
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2018 (English)In: Ore Geology Reviews, ISSN 0169-1368, E-ISSN 1872-7360, Vol. 96, p. 48-71Article in journal (Refereed) Published
Abstract [en]

Mineralization types at the Palaeoproterozoic Falun base metal sulphide deposit are predominantly pyritic Zn-Pb-Cu-rich massive sulphide mineralization, disseminated to semi-massive Cu-Au mineralization, auriferous quartz veins, and mineralized shear zones of talc-chlorite-dominated schist. The massive and disseminated to semi-massive sulphide mineralization types were subject to polyphase ductile deformation (D1 and D2) and metamorphism under low-P, lower-amphibolite facies conditions, which led to the development of ore textures and paragenetic relationships indicating both mechanical and chemical remobilization of sulphides. In the massive sulphide mineralization, rare inclusion-rich pyrite occurs as relic cores inside inclusion-poor metamorphosed pyrite. Imaging and spot analysis using multielement laser ablation inductively-coupled plasma mass spectrometry (LA-ICP-MS) reveal that inclusion-poor pyrite was depleted in trace elements, which were originally present as non-stoichiometric lattice substitutions or in mineral inclusions. The inclusion-rich pyrite was shielded from depletion and, at least partly, retained its initially higher trace element concentrations, including Au.

Gold is also associated with chalcopyrite in the disseminated to semi-massive Cu-Au mineralization and in the system of auriferous quartz veins hosted therein, the latter being also affected by the D2 ductile strain. It is inferred that emplacement of the vein system took place after the peak of metamorphism, which occurred between D1 and D2, but prior to and possibly even shortly after completion of the D2 deformational event. Similarities in trace element signatures in chalcopyrite are compatible with the interpretation that the quartz veins formed by local chemical remobilization of components from the Cu-Au mineralization. Transport of liberated Au from pyrite during grain growth in the massive sulphide mineralization may have upgraded the Au endowment in the quartz veins, leading to the additional formation of native gold in the veins. A strong correspondence between elements liberated from pyrite (e.g. Pb, Bi, Se and Au) and those forming discrete and characteristic mineral phases in the quartz veins (Pb-Bi sulphosalts, native gold) supports this hypothesis.

Trace element signatures for the main sulphide minerals pyrite, chalcopyrite, sphalerite and galena are similar to previously published data from other metamorphosed massive sulphide deposits. The association of the Falun mineralization with elevated Bi is reflected by its occurrence in sulphide minerals (e.g. galena) and in abundant mineral inclusions of Pb-Bi sulphosalts (e.g. weibullite), especially in the disseminated to semi-massive Cu-Au mineralization. Elevated Sn concentrations in the lattice and/or as cassiterite inclusions in chalcopyrite, sphalerite and galena are compatible with a hot, acidic and reducing fluid during formation of the syn-volcanic, base metal sulphide mineralization and associated host-rock alteration.

Place, publisher, year, edition, pages
Elsevier, 2018
Keywords
Falun deposit, Bergslagen, Fennoscandian Shield, sulphide remobilization, LA-ICP-MS, trace elements
National Category
Geology
Research subject
Ore Geology
Identifiers
urn:nbn:se:ltu:diva-61672 (URN)10.1016/j.oregeorev.2018.04.010 (DOI)000434004700004 ()2-s2.0-85045259948 (Scopus ID)
Projects
Structural evolution, hydrothermal alteration and tectonic setting of the Falun base metal and gold deposit, Bergslagen region, Sweden
Funder
The Geological Survey of Sweden (SGU), 61-1441/2011
Note

Validerad;2018;Nivå 2;2018-04-16 (andbra)

Available from: 2017-01-27 Created: 2017-01-27 Last updated: 2018-06-28Bibliographically approved
Kampmann, T. C. (2017). Age, origin and tectonothermal modification of the Falun pyritic Zn-Pb-Cu-(Au-Ag) sulphide deposit, Bergslagen, Sweden. (Doctoral dissertation). Luleå University of Technology
Open this publication in new window or tab >>Age, origin and tectonothermal modification of the Falun pyritic Zn-Pb-Cu-(Au-Ag) sulphide deposit, Bergslagen, Sweden
2017 (English)Doctoral thesis, comprehensive summary (Other academic)
Abstract [en]

The Falun pyritic Zn-Pb-Cu-(Au-Ag) sulphide deposit, situated in the Palaeoproterozoic (1.9–1.8 Ga) Bergslagen lithotectonic unit in the south-western part of the Fennoscandian Shield, is one of the major base and precious metal sulphide deposits in Sweden. Felsic volcanic rocks and limestone hosting the deposit, as well as their hydrothermally altered equivalents and the mineralization, were affected by heterogeneous ductile strain and metamorphism under low-pressure, lower amphibolite-facies conditions during the Svecokarelian orogeny (2.0–1.8 Ga). These processes reworked the mineral assemblages of the original hydrothermal system and the mineralization, and also reshaped the structural geometry of the deposit.

A three-dimensional modelling approach has been used in order to evaluate geometric relationships between lithologies at the deposit. The polyphase character (D1 and D2) of the strong ductile deformation at Falun is apparent. The main rock-forming minerals in the altered silicate-rich rocks are quartz, biotite and anthophyllite with porphyroblasts of cordierite and garnet, as well as retrogressive chlorite. Major static grain growth occurred between D1 and D2, inferred to represent the peak of metamorphism, as well as after D2 with growth (or recrystallization) of anthophyllite. A major shear zone with chlorite, talc and disseminated sulphides bounds the pyritic Zn-Pb-Cu-rich massive sulphide mineralization to the north, the latter being surrounded elsewhere by disseminated to semi-massive Cu-Au mineralization. F2 sheath folding along axes plunging steeply to the south-south-east is suggested as a key deformation mechanism, accounting for the cone-shaped mineralized bodies, which pinch out at depth, and explaining the similar character of intensely altered rocks on all sides of the massive sulphide mineralization. Immobile-element lithogeochemistry suggests that they share a common volcanic precursor. These relationships are consistent with a model in which the pyritic massive sulphide mineralization is located in the core of a sheath fold structure, surrounded by the same altered stratigraphic footwall rocks with Cu-Au mineralization.

The geological evolution in the metavolcanic inlier that hosts the Falun deposit, constrained by secondary ion mass spectrometry (SIMS) U–Pb (zircon) geochronology, involved emplacement of a felsic volcanic and sub-volcanic rock suite at 1894±3 Ma, followed by hydrothermal alteration and mineralization. Subsequent burial and intrusion of late- to post-mineralization dykes occurred between 1896±3 Ma and 1891±3 Ma, followed by further burial and emplacement of plutons with variable composition during the time span 1894±3 Ma to 1893±3 Ma. The age determinations for all these magmatic suites overlap within their uncertainties, indicating a rapid sequence of continuous burial and different magmatic pulses. A metamorphic event, herein dated at 1831±8 Ma and 1822±5 Ma (SIMS U–Pb monazite), falls in the age range of a younger Svecokarelian metamorphic episode (M2). U-Th-Pb isotope systematics in monazite was completely reset during this event.

During hydrothermal alteration and mineralization, a hot, reducing and acidic fluid carrying metals and sulphur together flowed upward along syn-volcanic faults, leading to intense chloritization, sericitization and silicification of calc-alkaline volcanic rocks in the stratigraphic footwall to the deposit. This resulted in proximal siliceous associations including Fe-rich chlorite, and dominant Mg-rich chlorite and sericite in more peripheral parts. Cu-Au stockwork mineralization formed in the siliceous core of the hydrothermal system as result of fluid cooling. Neutralization of the metal-bearing fluids upon carbonate interaction stratigraphically higher in the sub-seafloor regime led to formation of Zn-Pb-Cu-rich massive sulphide mineralization, the space for which was created by a combination of carbonate dissolution, primary porosity in the overlying volcanic rocks and secondary porosity produced during syn-volcanic faulting. A hybrid model for mineralization is suggested by alteration styles, metal zoning and textures indicating replacement of carbonate rock or highly porous pumice breccia by pyritic massive sulphide. Aspects of a sub-seafloor volcanogenic massive sulphide (VMS) system and carbonate replacement are both present. Partly Zn-Pb-(Ag) mineralized skarns comprise a separate and subordinate type of mineralization, probably formed after burial of the hydrothermal system to the contact-metasomatic regime.

Textures and microstructures in the massive sulphide mineralization indicate that the ductile deformation and metamorphism resulted in internal mechanical and chemical remobilization of sulphide minerals. Laser ablation inductively coupled mass spectrometry (LA-ICP-MS) analysis of the main sulphide minerals suggests, for example, that trace elements (including Au) were liberated from pyrite during metamorphism. A system of auriferous quartz veins, affected by D2 ductile strain, occurs in intensely altered and mineralized rocks on the eastern side of the deposit. It is suggested that they formed after the peak of metamorphism and prior to the completion of the D2 tectonic event, as a result of fluid-assisted remobilization of sulphides and Au in the disseminated to semi-massive Cu-Au mineralization and possibly also the massive sulphide mineralization.

Place, publisher, year, edition, pages
Luleå University of Technology, 2017
Series
Doctoral thesis / Luleå University of Technology 1 jan 1997 → …, ISSN 1402-1544
National Category
Geology
Research subject
Ore Geology
Identifiers
urn:nbn:se:ltu:diva-61620 (URN)978-91-7583-796-3 (ISBN)978-91-7583-797-0 (ISBN)
Supervisors
Projects
Structural evolution, hydrothermal alteration and tectonic setting of the Falun base metal and gold deposit, Bergslagen region, Sweden
Available from: 2017-01-27 Created: 2017-01-27 Last updated: 2017-11-24Bibliographically approved
Kampmann, T. (2017). Age, Origin and Tectonothermal Modification of the Falun Pyritic Zn-Pb-Cu-(Au-Ag) Sulphide Deposit, Bergslagen, Sweden: Supplementary data tables.
Open this publication in new window or tab >>Age, Origin and Tectonothermal Modification of the Falun Pyritic Zn-Pb-Cu-(Au-Ag) Sulphide Deposit, Bergslagen, Sweden: Supplementary data tables
2017 (English)Data set, Primary data
National Category
Geology
Research subject
Ore Geology
Identifiers
urn:nbn:se:ltu:diva-62530 (URN)
Available from: 2017-03-16 Created: 2017-03-16 Last updated: 2017-11-24Bibliographically approved
Organisations
Identifiers
ORCID iD: ORCID iD iconorcid.org/0000-0003-1867-2342

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