Essays about: "kiseldioxid utfällning"

Found 2 essays containing the words kiseldioxid utfällning.

1. 1. Polymerized Tubular Silicates in Lower Cambrian Carbonates – Biology or Chemistry?

   University essay from Uppsala universitet/Institutionen för geovetenskaper

   Author : Scott Green; [2022]
   Keywords : biosignature; tubular structures; Lower Cambrian; silica precipitation; bifurcating; biosignatur; rörstrukturer; Kambrium Serie 3; kiseldioxid utfällning; förgrening;

   Abstract : Shallow marine environments from the Lower Cambrian period were very different to shallow marine environments of today. Tubes of what was thought to be silica recovered from a partly dolomitized carbonate sample collected form a site near Indian Springs, Nevada could help further understand the chemistry and characteristics of such environments. READ MORE

3. 2. 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