Search for dissertations about: "Institutionen för geologi och geokemi."
Showing result 1 - 5 of 77 swedish dissertations containing the words Institutionen för geologi och geokemi..
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1. Geochronology of the Oklo and Bangombé fossil natural fission reactors : tracing the effects of geological events
Abstract : Thesis to be publicly defended for the degree of Doctor of Philosophy, in lecture room De Geersalen, Svante Arrhenius väg 8a, Stockholm, Friday February 1, 2002 at 10.00 am. Two billion years ago, natural fission reactions took place in the Oklo and Bangombé uranium ores in Gabon, West Equatorial Africa. READ MORE
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2. Crustal evolution in the southeastern part of the Fennoscandian Shield
Abstract : .... READ MORE
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3. Assessing the reliability of detrital zircon in Early-Earth provenance studies
Abstract : Our understanding of the Early Earth and the processes that have shaped its evolution have spawned predominantly from the geochemical and isotopic signatures of a small number of zircon populations around the world. Studies of trace element distributions, Hf and O isotope systematics as well as mineral inclusion chemistry in detrital zircon are combined with U-Pb chronology in order to constrain source rock characteristics. READ MORE
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4. The evolution of lunar breccias : U-Pb geochronology of Ca-phosphates and zircon using Secondary Ion Mass Spectrometry
Abstract : Planetary bodies in our Solar System, including the Moon, were exposed to an intense asteroid bombardment between ~4.5-3.8 Ga, shaping their surfaces and leaving visible “footprints” in the form of large impact basins. The end of this period (~4. READ MORE
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5. Mineral dissolution from molecular to field scale
Abstract : Mineral reactivity contributes to the global biogeochemical cycling of elements. CO2is consumed during the chemical weathering of many silicates and during formation of carbonates in the oceans. READ MORE