stripes
Occurrence number:
163-00-037
Country:
Tanzania
Location:
Longitude: 33.18, Latitude: -8.97
Carbonatite:
Yes
This occurrence comprises two main carbonatite dykes and numerous smaller ones.The main dykes trend northeast-southwest and consist of dolomitic carbonatite with accessory pyrite, magnetite, barite and pyrochlore with interstitial and vein quartz. Fenites marginal to the dykes are principally of alkali feldspar, but some aegirine has been reported. Bell and Blenkinsop (1987) give Sr and Nd isotope data for a sample of carbonatite.
Age:
Post-Karoo, pre-Cretaceous. Probably similar in age to Panda Hill (No. 163-00-038), which is just to the southeast (see Bell and Blenkinsop, 1987).
References:
BELL, K. and BLENKINSOP, J. 1987. Nd and Sr isotopic compositions of East African carbonatites: implications for mantle heterogeneity. Geology, 15: 99-102. FICK, L.J. and VAN DER HYDE, C. 1959. Additional data on the geology of the Mbeya carbonatite. Economic Geology, 54: 842-72.
Location: