Mélanges and associated rocks, Livingstone Mountains, Southland, New Zealand
- 1 July 1979
- journal article
- research article
- Published by Taylor & Francis in New Zealand Journal of Geology and Geophysics
- Vol. 22 (4), 443-454
- https://doi.org/10.1080/00288306.1979.10424152
Abstract
Four parallel belts of rocks west of North Mavora Lake, northern Southland, New Zealand, are mapped and described. The easternmost belt, the West Burn semischists, consists of reconstituted spilites, phyllites, and semischists, whose textural grade of metamorphism increases up-section to the west. The two central belts are melanges, one with serpentinite matrix and small tectonic inclusions (Upukerora melange), while the other has a spilitic matrix and large (up to several kilometres) tectonic inclusions (Windon mélange). The westernmost belt consists of overturned volcanogenic Upper Permian sediments (Bryneira Group). Regional metamorphism ranges from pumpellyite-actinolite facies, over most of the area, to lawsonite-albite-chlorite facies in Bryneira Group. Localised bodies of greenschist facies rocks occur in fault zones. Metasomatism is very pronounced in the serpentinite melange. Pectolite occurs abundantly as a low temperature metasomatic vein and replacement mineral. The area has been complexly faulted, with few unfaulted primary contacts remaining. The largest fault, Livingstone Fault, is of regional significance.Keywords
This publication has 7 references indexed in Scilit:
- The Dun Mountain ophiolite belt, New Zealand, its tectonic setting, constitution, and origin, with special reference to the southern portionAmerican Journal of Science, 1976
- Stratigraphy, lithology, structure, and metamorphism of Permian, Triassic, and Tertiary rocks between the Mararoa River and Mount Snowdon, western Southland, New ZealandJournal of the Royal Society of New Zealand, 1974
- Progressive Metamorphism from Prehnite-Pumpellyite to Greenschist Facies in the Dansey Pass Area, Otago, New ZealandGSA Bulletin, 1972
- Metamorphism in the Mid-Atlantic Ridge near 24° and 30° NPhilosophical Transactions of the Royal Society of London. Series A, Mathematical and Physical Sciences, 1971
- Principles of Mélanges and Their Bearing on the Franciscan-Knoxville ParadoxGSA Bulletin, 1968
- Hydrogarnet formation in the system lime-alumina-silica-waterJournal of Research of the National Bureau of Standards, 1956
- The characterization of serpentine minerals by X-ray diffractionMineralogical Magazine and Journal of the Mineralogical Society, 1956