Petrochemistry of the Auckland basalts
- 1 February 1960
- journal article
- research article
- Published by Taylor & Francis in New Zealand Journal of Geology and Geophysics
- Vol. 3 (1) , 23-40
- https://doi.org/10.1080/00288306.1960.10423142
Abstract
Thirteen new analyses of lavas from Auckland are presented and discussed. The rocks are shown to be olivine-rich alkaline basalts, chemically comparable with lavas from the Pacific basin but possibly derived by crystallisation fractionation along a trend characteristic of a continental environment. The composition of the Auckland rocks is compared with that of Pliocene-Pleistocene basalts from Northland and from South Auckland. The origin of olivine nodules and a nepheline basanite associated with the Auckland basalts is considered.Keywords
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