Petrochemistry of the Auckland basalts
作者:
E. J. Searle,
期刊:
New Zealand Journal of Geology and Geophysics
(Taylor Available online 1960)
卷期:
Volume 3,
issue 1
页码: 23-40
ISSN:0028-8306
年代: 1960
DOI:10.1080/00288306.1960.10423142
出版商: Taylor & Francis Group
数据来源: Taylor
摘要:
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.
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