Browsing NTNU Open by Author "Ellefmo, Steinar Løve"
Now showing items 21-40 of 64
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Early Stage Decisions in Marine Systems Design for Deep-Sea Mining
Solheim, Astrid Vamråk; Pettersen, Sigurd Solheim; Agis, Jose Jorge Garcia; Brett, Per Olaf; Asbjørnslett, Bjørn Egil; Erikstad, Stein Ove; Ellefmo, Steinar Løve (Peer reviewed; Journal article, 2022)This article studies the prospects for deep seabed mining as a future viable maritime industry, and discuss the commercial, operational, and technical viability of deep seabed mining. By the use of a business development ... -
Economic block model development for mining seafloor massive sulfides
Lesage, Maxime; Juliani, Cyril Jerome; Ellefmo, Steinar Løve (Journal article; Peer reviewed, 2018)To support open-pit studies related to seafloor massive sulfides mining projects, an economic block-model is required. A modular framework is proposed to produce economic block models accommodating various levels of data. ... -
Estimating the blast sill thickness using changepoint analysis of MWD data
Vezhapparambu, Veena Sajith; Ellefmo, Steinar Løve (Peer reviewed; Journal article, 2020)Measurement while drilling (MWD) data are collected during production drilling in the open pit operation in question. On every bench in the open pit, a fractured marble zone (sill) is left on top of the hard and un-fractured ... -
Exploration of Sediment Hosted Massive Sulfide (SHMS) deposits in the Barents Sea
(Master thesis, 2019)Barentshavets geologi hjemmer flere hydrokarbonreservoarer, som gjør den til en økonomisk viktig del av norsk sokkel, og er tidligere blitt grundig undersøkt på grunn av dette. I denne oppgaven blir regionen utforsket med ... -
Feasibility of Deep-Sea Mining Operation Within Norwegian Jurisdiction
Frimanslund, Erik Kristian Thon (Master thesis, 2016)Numerous hydrothermal vent sites are discovered along the Arctic Mid-Ocean Ridge (AMOR), stretching some 1,050 km from Jan Mayen to Svalbard, mostly within Norway s economically exclusive zone (EEZ). Associated with these ... -
First hyperspectral imaging survey of the deep seafloor: High-resolution mapping of manganese nodules
Dumke, Ines; Nornes, Stein Melvær; Purser, Autun; Marcon, Yann; Ludvigsen, Martin; Ellefmo, Steinar Løve; Johnsen, Geir; Søreide, Fredrik (Journal article; Peer reviewed, 2018)Hyperspectral seafloor surveys using airborne or spaceborne sensors are generally limited to shallow coastal areas, due to the requirement for target illumination by sunlight. Deeper marine environments devoid of sunlight ... -
Forslag til adkomstløsning for fremtidig brytning av forekomstene Rupsi, Giken og Charlotta i Sulitjelma - Med forslag til løsning for oppboring av Rupsi-forekomsten
Ramlo, Elisabeth (Master thesis, 2015)Nye Sulitjelma Gruver AS planlegger ny drift i Nordgruvefeltet i Sulitjelma, nærmere bestemt på den hittil uberørte Rupsi-forekomsten, på bunnen av Nedre Charlotta gruve og på forlengelsen av Giken-forekomsten. Til dette ... -
Geologisk utvikling og 3D modellering av randsonen i Svea Nord forekomsten: Med fokus på mellomstein, overliggende bentonittlag og konsekvens for brytningen
Velve, Håvard (Master thesis, 2013)Denne hovedoppgaven er skrevet i samarbeid med Store Norske Spitsbergen Grubekompani (SNSG) som et bidrag i kartleggingen av randsonen til Svea Nord kullgruva 50 km sørøst for Longyearbyen på Svalbard. Gjennom geologiske ... -
A Geometallurgical Approach Applied to the Tromsdalen Calcite Operation
Lang, Aleksandra Maria (Doctoral theses at NTNU;2020:161, Doctoral thesis, 2020)The motivation behind the thesis was to increase the knowledge and to expand the possibilities within industrial mineral mining, an important mining sector in Norway. This was done through extensive deposit study and an ... -
Geometallurgical Approach to the Element-to-Mineral Conversion for the Nabbaren Nepheline Syenite Deposit
Mena Silva, Camilo Andrés; Sørensen, Bjørn Eske; Aasly, Kurt; Ellefmo, Steinar Løve (Journal article; Peer reviewed, 2018)Nabbaren nepheline syenite, a silica-deficient intrusive rock with low Fe content, was the industrial mineral deposit study case in this study. The quality of industrial mineral products are generally based on their bulk ... -
Geometallurgical Flowsheet as a Tool for Designing and Communicating Geometallurgical Programs
Lang, Aleksandra Maria; Ellefmo, Steinar Løve; Aasly, Kurt (Journal article; Peer reviewed, 2018)This paper introduces the concept of using a geometallurgical flowsheet as a tool to design, visualize and communicate a geometallurgical program. The development of the concept is carried out using a case study of an ... -
Geometallurgical Modelling of the Stjernøya Nepheline Syenite Mine
Silva, Camilo Andrés Mena (Doctoral theses at NTNU;2019:385, Doctoral thesis, 2019)The present study applies the concept of geometallurgy to an industrial mineral case study. Geometallurgy is a holistic discipline conveying different aspects of geology, mineral processing and mining together to improve ... -
Geometric and Qualimetric Modelling of the Hessjø deposit
Nørsett, Silje Marie (Master thesis, 2016)The main goal of this master thesis is to develop geometric and qualimetric 3D-models the Hessjø deposit, located in Holtålen, Norway, using data acquired in the 1970s. This includes a thorough evaluation of the data in ... -
Geospatial Analysis of Copper-Rich Ferromanganese Crust and Seafloor Massive Sulfide Occurrences on the Extended Norwegian Continental Shelf
Stępień, Weronika Marianna (Master thesis, 2023)SAMMENDRAG Hovedmål for forskningen: Geospatial Analyse av kobberrike ferromanganesekruster og seafloor massive sulfideforekomster på et utvalgt fragment av den utvidede norske kontinentalsokkelen. Studiens omfang: ... -
Identifisering og Kvantifisering av utvalgte Designparametre for underjordsbrytning i Vestmalmen, Rana Gruber AS
Haugen, Iver Fossen (Master thesis, 2020)I denne oppgaven presenteres det kvantifiserte designparametre for underjordsdrift på Vestmalmen ved Rana Gruber i Ørtfjell. Målet er å komme med en anbefaling på dimensjoner og om mulig komme frem til den mest passende ... -
Integrated Spatiotemporal Analysis of Vegetation Condition in a Complex Post-Mining Area: Lignite Mine Case Study
Blachowski, Jan; Dynowski, Aleksandra; Buczyńska, Anna; Ellefmo, Steinar Løve; Walerysiak, Natalia (Peer reviewed; Journal article, 2023)The motivation for this study arises from the need to monitor the condition of a rehabilitated post-mining areas even decades after the end of the recovery phase. This can be facilitated with satellite derived spectral ... -
Kvartærgeologi og implisitt 3D-modellering av løsmassene i Bømoen, Vestland
Bakken, Emilie Arntzen (Master thesis, 2023)Med befolkningsvekst og økt forbruk vil presset på landarealer, råstoff og grunnvann bli større. Mektighetene av berg og løsmasser under beinene våre er en ressurs som må forvaltes på lik linje med andre ressurser, for å ... -
Ladningsberegning basert på frekvensveide vibrasjonskrav
Gjengedal, Sondre (Master thesis, 2013)Den Norske Standarden, NS8141-01:2012 Vibrasjoner og støt ? Veiledende grenseverdier for bygge- og anleggsvirksomheten, bergverk og trafikk, har nylig gjennomgått en større revisjon hvor de veiledende grenseverdiene for ... -
Large-Scale Underground Mining in Tromsdalen: With focus on dimensioning and design of stopes and pillars
Pedersen, Anja Hammernes (Master thesis, 2014)The objective of this thesis is to estimate the stope dimensions for a future underground mine in Tromsdalen, Verdal. Additionally, the most favourable orientation of the stopes and possible stope layouts will be assessed. ... -
Marine minerals' role in future holistic mineral resource management
Ellefmo, Steinar Løve; Aberle-Malzahn, Nicole; Hagspiel, Verena; Ingulstad, Mats; Aasly, Kurt (Journal article; Peer reviewed, 2022)