Homogeneity Of Libyan Desert Glasses

Optical and electron methods were used to study the homogeneity of some Libyan Desert glass (LDG) samples which displayed dark brown bands and streaks. These inclusions contained Fe203 and wollastonite (CaSi03) and cristobalite (Si02) crystals were also found in them. Electron microprobe line analyses showed inclusions which, under the assumption that peak-like element distribution curves can be interpreted as diffusion profiles, led to the conclusion that high-temperature dissolution processes may have had some importance during the genesis of LDG.