Sökning: "Cr-spinell"
Hittade 2 uppsatser innehållade ordet Cr-spinell.
1. Cr-spinels in the Franklinian Mobile Belt : a geochemical record of Paleozoic tectonics
Kandidat-uppsats, Stockholms universitet/Institutionen för geologiska vetenskaperSammanfattning : The chemical compositions of Cr-spinel extracted from mafic and ultramafic rocks collected on Ellesmere Island in the Arctic Canadian Archipelago were obtained through electron microprobe analyses. The extensively altered rocks are sampled from rock units in the Franklinian MobileBelt, which is representative of a Paleozoic tectonically active oceanic regime of which little is presently known. LÄS MER
2. Spinel group minerals in carbonaceous and ordinary chondrites
Kandidat-uppsats, Lunds universitet/Geologiska institutionenSammanfattning : 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