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.
|Title||Geochronology and pressure temperature conditions of mid-to-lover crustal processes in a cretaceous magmatic arc, Fiordland, New Zealand|
|Author||Parker, Karen Ann|
|Degree Discipline||Department of Geological Sciences|
|Degree Level||Master of Science|
|Degree Grantor||University of Alabama (USA)|
|Keywords||geochronology; Cretaceous; pressure; temerature|
|Locality||Fiordland; New Zealand|