Sökning: "Mineral deposits"

Visar resultat 21 - 25 av 93 avhandlingar innehållade orden Mineral deposits.

1. 21. Geological, geochemical and mineralogical characterization of non-metallic mineral deposits in the La Paz region, Bolivia

   Författare :Ariana Zeballos; Christina Wanhainen; Pär Weihed; Olav Eklund; Luleå tekniska universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Malmgeologi; Ore Geology;

   Sammanfattning : Industrial mineral resources are a promising source of economic development in Bolivia where the mining industry’s main focus is on metalliferous deposits. The industrial mineral resources in Bolivia are of large quantity, even though they remain only locally known, as well as understudied to a large degree. LÄS MER

3. 22. Crustal architecture of the Kiruna mining district : Structural framework, geological modeling, and physical rock property distribution

   Författare :Ervin Csaba Veress; Tobias Bauer; Stefan Luth; Luleå tekniska universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Kiruna mining district; geological modeling; structural framework; common earth modeling; petrophysical characterization; mineral exploration; iron oxide-apatite; Ore Geology; Malmgeologi;

   Sammanfattning : Rapid technological advancements and growing environmental consciousness created a shifting dynamic of metal demand within the context of contemporary global challenges. The metals play a pivotal role in this transformation and remarkable surge in demand is expected. LÄS MER

4. 23. Reflection seismic investigation in the Skellefte ore district : A basis for 3D/4D geological modeling

   Författare :Mahdieh Dehghannejad; Christopher Juhlin; Ari Tryggvason; Charles Hurich; Uppsala universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Skellefte district; reflection seismic; mineral exploration; 3D 4D modeling; mineralization; faults and shear zones; Geofysik med inriktning mot fasta jordens fysik; Geophysics with specialization in Solid Earth Physics;

   Sammanfattning : The Skellefte ore district in northern Sweden is a Palaeoproterozoic volcanic arc and one of the most important ones hosting volcanogenic massive sulfide (VMS) deposits, producing mainly base metals and orogenic gold deposits. Due to high metal prices and increased difficulties in finding shallow deposits, the exploration for and exploitation of mineral resources is quickly being moved to greater depths. LÄS MER

5. 24. Microbial adhesion and surface modifications of sulphide minerals relevant to flotation and flocculation

   Författare :Annamaria Vilinska; Ponisseril Somasundaran; Luleå tekniska universitet; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Mineralteknik; Mineral Processing;

   Sammanfattning : Biological processes have been attracting attention in mineral processing industry due to their lower operating costs, environmental acceptability and flexibility in adaptation. Bio-hydrometallurgical methods to treat various sulphide and oxide ores have been developed during the years and these processes have been adopted by certain mineral industries. LÄS MER

7. 25. Source and age of late Quaternary loess deposits in Europe

   Författare :Yunus Baykal; Thomas Stevens; Christian Zdanowicz; Bryan C. Lougheed; Phillip L. Gibbard; Uppsala universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Naturgeografi; Physical Geography;

   Sammanfattning : Atmospheric mineral dust is a fundamental component of the Earth’s climate system, with dust both responding to and driving climate change. This close link between dust and climate is recorded in archives of past dust activity, which show that abrupt 101-3 yr shifts in temperature during the last glacial period were accompanied with fluctuations in dust activity. LÄS MER