Essays about: "chromite"

Showing result 11 - 12 of 12 essays containing the word chromite.

  1. 11. Spinel group minerals in carbonaceous and ordinary chondrites

    University essay from Lunds universitet/Geologiska institutionen

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

    Abstract : 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. READ MORE

  3. 12. Titanium- and chromium-rich opaque minerals in condensed sediments : chondritic, lunar and terrestrial origins

    University essay from Lunds universitet/Geologiska institutionen

    Author : Sanna Holm; [2008]
    Keywords : Ilmenite; chrome spinel; 3He; lunar impact ejecta; source rock; Middle Ordovician; Late Eocene; ilmenit; kromspinell; impakt ejekta; källbergart; mellanordovicium; sen eocen; Earth and Environmental Sciences;

    Abstract : Evidence from terrestrial sedimentary successions indicate that the amount of extraterrestrial material reaching Earth is not constant, but has been increased during parts of the Phanerozoic. An increase in the flux of extraterrestrial material to Earth has been proposed for the Middle Ordovician and the Late Eocene. READ MORE