Essays about: "hydrothermal zircon"

Showing result 1 - 5 of 6 essays containing the words hydrothermal zircon.

1. 1. Resolving temporal links between the Högberget granite and the Wigström tungsten skarn deposit in Bergslagen (Sweden) using trace elements and U-Pb LA-ICPMS on complex zircons

   University essay from Lunds universitet/Geologiska institutionen

   Author : Anders Plan; [2020]
   Keywords : Bergslagen; Wigström; Högberget; geochronology; geochemistry; U-Pb; REE; trace element; zircon; hydrothermal zircon; LA-ICPMS; SEM; skarn; tungsten; wolfram; scheelite; deposit; ore; critical raw material; Earth and Environmental Sciences;

   Abstract : Combined U-Pb and REE trace element LA-ICPMS analyses were performed on zircons, from the scheelite-bearing Wigström skarn, associated micro-granitic dykes and the highly evolved parental Högberget (sensu stricto) granite. Combined systematic of zircon typology and microtextures, trace elements and isotopic chemistry suggest the presence of several diverse zircon types, spanning from early- to late- magmatic stage into a hydrothermal stage. READ MORE

3. 2. U-Pb geochronology and geochemistry of host rocks to the Bastnäs-type REE mineralization in the Riddarhyttan area, west central Bergslagen, Sweden

   University essay from Lunds universitet/Geologiska institutionen

   Author : Wictor Linders; [2016]
   Keywords : Riddarhyttan; REE; Metavolcanic rocks; LA-ICP-MS; Zircon; Monazite.; Earth and Environmental Sciences;

   Abstract : The geochronology of felsic metavolcanic rocks hosting the Bastnäs-type rare earth element (REE) mineralization in the Riddarhyttan area in the Bergslagen region, Sweden, was investigated using Laser Ablation Inductively Coupled Plasma Mass Spectrometry (LA-ICP-MS) U-Th-Pb on zircon and monazite. U-Pb data from four host rock samples yield dates of 1899 ± 4 Ma (MSWD=2. READ MORE

4. 3. Understanding igneous processes through zircon trace element systematics : prospects and pitfalls

   University essay from Lunds universitet/Geologiska institutionen

   Author : Marín Ósk Hafnadóttir; [2014]
   Keywords : plagioclase fractionation. zirkon; hydrothermal alteration; precambrian; zircon; Ghana; hydrotermal-omvandling; plagioklasfraktionering; Earth and Environmental Sciences;

   Abstract : Zirkon från magmatiska bergarter extraherades från fem granitoider i Birimianterrängen i Ghana., och detritala zirkoner provtogs från sex platser i centrala Västgrönland. Av dessa härrör en population från palaeoproterozoikum i Prøvens magmatiska komplex. READ MORE

5. 4. Ore Petrography and Geochemistry of some REE-bearing Fe-oxide Assemblages from the Idkerberget Deposit, Bergslagen, Sweden

   University essay from Institutionen för geovetenskaper

   Author : Fredrik Sahlström; [2012]
   Keywords : Idkerberget; Petrography; Geochemistry; REE; Apatite-Iron Oxide Ore;

   Abstract : The mine dumps of Kiruna-type apatite-iron oxide ore in Bergslagen, South Central Sweden, contain elevated amounts of rare earth elements (REEs). A recently started project at Uppsala University has been initiated to study these ores among others in order to document occurrences of REEs and other critical elements in the mine dumps. READ MORE

6. 5. Experimental zircon alteration and baddeleyite formation in silica saturated systems : implications for dating hydrothermal events

   University essay from Lunds universitet/Geologiska institutionen

   Author : Alexander Lewerentz; [2011]
   Keywords : zirkon; baddeleyit; kiselmättat system; hydrotermal omvandling; kopplad upplösning-utfällning; experimentell petrologi; svepelektronmikroskopi; elektronmikrosondanalys; energidispersiv röntgenemissionsspektroskopi; sydvästra Grönland; zircon; baddeleyite; silica saturated system; hydrothermal alteration; coupled dissolutionreprecipitation; experimental petrology; scanning electron microscopy; electron microprobe analysis; energy dispersive x-ray spectroscopy; southern West Greenland; Earth and Environmental Sciences;

   Abstract : Populärvetenskaplig sammanfattning: Åldersbestämning av fluidrelaterade händelser. Zirkon och baddeleyit är mineral som kan användas för att åldersbestämma bergarter genom radiometriska metoder. När mineralen bildas bygger de in uran i sin struktur, men inte bly. READ MORE