Kōrero: Rock, limestone and clay

Trimming mica

Trimming mica

During the Second World War, when this photograph was taken, a shortage of mica sparked a search for possible New Zealand sources as part of the war effort. The mineral was used in radio condensers and in aircraft as spark-plug washers. The search focused on the hills of South Westland, where dykes known as pegmatites occur in the rock. These contain large-grained minerals, including muscovite mica. However, the New Zealand deposits proved too small, and inferior to those overseas.

Te whakamahi i tēnei tūemi

Private collection
Photograph by Harold Wellman

This item has been provided for private study purposes (such as school projects, family and local history research) and any published reproduction (print or electronic) may infringe copyright law. It is the responsibility of the user of any material to obtain clearance from the copyright holder.

Ngā whakaahua me ngā rauemi katoa o tēnei kōrero

Te tuhi tohutoro mō tēnei whārangi:

Carl Walrond, 'Rock, limestone and clay - Other minerals', Te Ara - the Encyclopedia of New Zealand, http://www.TeAra.govt.nz/mi/photograph/5263/trimming-mica (accessed 24 May 2022)

He kōrero nā Carl Walrond, i tāngia i te 12 Jun 2006