Mineralogy, chemistry, and age of granitic veins at Nicholson's Point, south coast, Natal

G. H. Grantham, B. M. Eglington

Research output: Contribution to journalArticlepeer-review

5 Citations (Scopus)

Abstract

Undeformed granitic veins exposed at Nicholson's Point, intrude nearly all the foliated rock types between Drakes Beach and Leisure Bay and therefore appear to post-date the major deformation episodes. Contacts between other rock units are displaced along the strike of the veins. A Rb/Sr isotope study yields a date of 960 ± 32 Ma which is within error of the date of the nearby deformed Glenmore Granite (946 ± 31 Ma). These results therefore imply that much of the deformation history recorded in the southern sector of Natal Structural and Metamorphic Province either occurred within a relatively short period (at most 49 Ma) or that the age of the Glenmore Granite is a reset age. The veins represent one of the youngest events recognized in the tectonic and intrusive history of the Natal Structural and Metamorphic Province implying that the area has probably not experienced later Pan-African activity. -from Authors

Original languageEnglish
Pages (from-to)88-93
Number of pages6
JournalSouth African Journal of Geology
Volume95
Issue number3-4
Publication statusPublished - 1992
Externally publishedYes

ASJC Scopus subject areas

  • Geology

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