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Smaaland Cove Intrusive Suite

Description

Small composite plutons of plagiogranite to quartz gabbro cutting Larson Harbour Fm lavas and contemporaneous with mafic dyke emplacement (Mair, 1987)1. Intrusion age of Smaaland Cove pluton is 150±1 Ma (Mukasa & Dalziel, 1996)2.

Age

Late Jurassic

Map Reference

Curtis, M. L. Geological Map of South Georgia (1:250 000 scale). Sheet 4, (British Antarctic Survey, 2011). Available here.

References

  1. Mair, B. F. The Geology of South Georgia: VI. Larsen Harbour Formation. Br. Antarct. Surv. Sci. Rep. 111, 60pp (1987). ↩

  2. Mukasa, S. B. & Dalziel, I. W. Southernmost Andes and South Georgia Island, North Scotia Ridge: zircon U-Pb and muscovite 40Ar39Ar age constraints on tectonic evolution of Southwestern Gondwanaland. J. South Am. Earth Sci. 9, 349–365 (1996). ↩