Geochronology and pressure temperature conditions of mid-to-lover crustal processes in a cretaceous magmatic arc, Fiordland, New Zealand

Abstract

Exposures of mid-to lower-crust in Fiordland contain evidence of high temperature and pressure processes occurring beneath magmatic arcs. This thesis presents new U-Pb zircon ages that constrain emplacement of the Malaspina Pluton, Western Fiordland Orthogneiss (WFO) to 116-114 Ma and new Sm-Nd garnet ages of 115-110 Ma for partial melting of the Malaspina near the Doubtful Sound Shear Zone (DSSZ), central Fiordland. U-Pb igneous zircon ages, from west to east across Doubtful Sound (DS), are 114.2, 2.2, 115.4, 2.2, and 116.1, 2.4 Ma.

Link

http://acumen.lib.ua.edu/content/u0015/0000001/0000512/u0015_0000001_0000512.pdf

Description
TitleGeochronology and pressure temperature conditions of mid-to-lover crustal processes in a cretaceous magmatic arc, Fiordland, New Zealand
AuthorParker, Karen Ann
Date2010
Degree DisciplineDepartment of Geological Sciences
Degree LevelMaster of Science
Degree GrantorUniversity of Alabama (USA)
FocusGeophysics
Keywordsgeochronology; Cretaceous; pressure; temerature
LocalityFiordland; New Zealand