Sökning: "ordinära kondriter"

Hittade 2 uppsatser innehållade orden ordinära kondriter.

  1. 1. Cosmic ray tracks in chondritic material with focus on silicate mineral inclusions in chromite

    Master-uppsats, Lunds universitet/Geologiska institutionen

    Författare :My Riebe; [2012]
    Nyckelord :extraterrestrial chromite; cosmic rays; cosmic ray tracks; ordinary chondrites; Ordovician; kosmisk strålning; spår efter kosmisk strålning; extraterrestrisk kromit; ordinära kondriter; ordovicium; Earth and Environmental Sciences;

    Sammanfattning : It has been suggested that the cosmic ray flux varies as Earth moves relative to the spiral arms in the galaxy. However, no satisfying record over the cosmic ray flux over long time scales has been presented. LÄS MER

  2. 2. Spinel group minerals in carbonaceous and ordinary chondrites

    Kandidat-uppsats, Lunds universitet/Geologiska institutionen

    Författare :My Riebe; [2009]
    Nyckelord :spinel group minerals; carbonaceous chondrites; ordinary chondrites; spinellgruppmineral; kolkondriter; ordinära kondriter; Earth and Environmental Sciences;

    Sammanfattning : Meteorites are easily altered in the oxygen-rich environment on the Earth surface. Fossil meteorites are thus uncommon and in the ones, which are found, almost all minerals are secondary. However, the spinel group mineral chromite is resistant to alteration and has successfully been used as a proxy for ordinary chondrites in sediment. LÄS MER