Age, palaeomagnetism and chemistry of melilite basalts in the Southern Cape, South Africa
- 1 September 1978
- journal article
- research article
- Published by Cambridge University Press (CUP) in Geological Magazine
- Vol. 115 (5) , 317-327
- https://doi.org/10.1017/s001675680003733x
Abstract
Summary: Post-Karroo melilite basalts intrude Cretaceous and older sedimentary units in the Cape Province, South Africa. K-Ar ages determined from 4 occurrences range from 63–75 Ma b.p. (Late Cretaceous to earliest Tertiary) and are significantly older than alkaline intrusions to the 5, on the Alphard Bank. These igneous intrusions may be part of a linear trend that connects young oceanic volcanism at Bouvet Island with Cretaceous kimberlitic activity in southern Africa. This lineament nearly parallels the Walvis Ridge and a hot spot model for its origin is examined.Keywords
This publication has 15 references indexed in Scilit:
- Systematic study of liquidas phase relations in olivine melilitite +H2O +CO2 at high pressures and petrogenesis of an olivine melilitite magmaContributions to Mineralogy and Petrology, 1977
- Linear volcanism in French PolynesiaJournal of Volcanology and Geothermal Research, 1976
- Controls of post-Gondwanaland alkaline volcanism in southern AfricaEarth and Planetary Science Letters, 1976
- RELATIONSHIP OF MELILITE-BEARING ROCKS TO KIMBERLITE: A PRELIMINARY REPORT ON THE SYSTEM AKERMANITE–CO2Published by Elsevier ,1975
- Marine geology in the environs of Bouvet Island and the South Atlantic triple juctionMarine Geophysical Research, 1973
- Comments on “Is the African Plate Stationary?”Nature, 1973
- Early Tertiary volcanic rocks on the Agulhas Bank, South African Continental ShelfGeological Magazine, 1972
- Deep Mantle Convection Plumes and Plate MotionsAAPG Bulletin, 1972
- KAr age determinations on basaltic rocks from south-west Africa and their bearing on continental driftEarth and Planetary Science Letters, 1968
- Evidence from Islands on the Spreading of Ocean FloorsNature, 1963