| Autor: |
Kampunzu, A. B., Kanika, M., Kapenda, D., Tshimanga, K. |
| Zdroj: |
International Journal of Earth Sciences; December 1993, Vol. 82 Issue: 4 p619-630, 12p |
| Abstrakt: |
The Late Proterozoic Katangan basic rocks (dolerites and basalts) outcropping at Kibambale in central Shaba (Zaire) are classified as extension-related tholeiites. The concentrations of immobile major and trace elements resemble those encountered in Phanerozoic enriched oceanic ridge basalts (E-MORB) emplaced in incipient oceanic rifts such as Red Sea and Tadjura Gulf troughs. This conclusion is also sustained by: elemental ratios which are MORB-like; multielement chondrite- and MORB-normalized patterns; sedimentological data, especially the shallow water conditions which prevailed during the deposition of lower Kundelungu tillite in which these basic rocks are interstratified; and the geological and structural framework, notably the emplacement of these igneous rocks in a basin not distant from the Kibaran continental land mass. |
| Databáze: |
Supplemental Index |
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