Early magmatism and the formation of a ��_Daly Gap��_ at Akaroa Shield Volcano, New Zealand

Hartung, Eva(2011)

Abstract

The origin of compositional gaps in volcanic deposits remains controversial. In Akaroa Volcano (9.6 to 8.6 Ma), New Zealand, a dramatic compositional gap exists between basaltic and trachytic magmas. Previously, the formation of more evolved magmas has been ascribed to crustal melting. However, the interpretation of new major and trace element analysis from minerals and bulk-rocks coupled with the mechanics of crystal-liquid separation offers an alternative explanation that alleviates the thermal restrictions required for crustal melting models

Link

http://ir.canterbury.ac.nz/handle/10092/5584

Description
TitleEarly magmatism and the formation of a ��_Daly Gap��_ at Akaroa Shield Volcano, New Zealand
AuthorHartung, Eva
Date2011
Degree LevelMaster of Science
Degree GrantorUniversity of Canterbury
FocusGeochimistry
KeywordsAkaroa Volcanic Group; magma differtntiation; crystal fractionation; melting; mineral; chemistry; basalt; trachyte
LocalityBanks Peninsula; Akaroa; New Zealand