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- Aldén, Marcus, et al.
(författare)
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Application of laser-induced fluorescence and CARS for combustion diagnostics
- 1993
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Ingår i: Berichte der Bunsengesellschaft für Physikalische Chemie. - 0005-9021. ; 97:12, s. 1643-1649
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Tidskriftsartikel (refereegranskat)abstract
- Laser diagnostic techniques have during the last decade been successfully applied for diagnostics of combustion processes. The main advantages with these techniques are that they are inherently non-intrusive and that spatially as well as temporally resolved information can be achieved. The current paper will exemplify two different laser spectroscopic techniques. Laser-Induced Fluorescence (LIF), and Coherent anti-Stokes Roman Scattering (CARS), which are currently the most used laser techniques for temperature and species concentration measurements in combustion systems.
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- Romer, Rolf L., et al.
(författare)
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Geochronology of the Kiruna iron ores and hydrothermal alterations
- 1994
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Ingår i: Economic geology and the bulletin of the Society of Economic Geologists. - : Society of Economic Geologists. - 0361-0128 .- 1554-0774. ; 89:6, s. 1249-1261
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Tidskriftsartikel (refereegranskat)abstract
- The magnetite-apatite iron ores at Kiruna are hosted in a suite of alkaline volcanic and subvolcanic rocks that was formed in a short time interval of about 20 m.y. between 1900 and 1880 Ma. U-Pb dating of titanite from magnetite-titanite dikes in the footwall of the Luossavaara orebody indicates that the age of the magnetite-apatite ores is 1888 + or - 6 Ma. Titanite-actinolite-calcite assemblages in amygdules are related to the hydrothermal and metasomatic alteration of the wall rocks and the ore. The U-Pb titanite age of the amygdule fill is 1876 + or - 9 Ma. The geographic distribution of the alteration suggests that it is not related to the formation of the iron ores. The youngest major magmatic units in the Kiruna area are 1792 + or - 4 Ma syenites that intruded the supracrustal rocks. The Kiruna area underwent a weak metamorphic overprint during the Caledonian orogeny. Our data are inconsistent with a hydrothermal event at ca. 1.5 Ga as has been suggested earlier.
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