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GEOREF RECORD

Geochemical evidence for the position of the Caples-Torlesse boundary in the Otago Schist, New Zealand

N. Mortimer and B. P. Roser
Geochemical evidence for the position of the Caples-Torlesse boundary in the Otago Schist, New Zealand
Journal of the Geological Society of London (November 1992) 149, Part 6: 967-977

Abstract

Comparison of the whole rock geochemical compositions of 142 samples of Otago Schist with greywackes and argillites from the Caples and Torlesse terranes confirms the essentially isochemical nature of Otago Schist metamorphism and permits correlation of individual schist samples to each terrane. These correlations, along with lithological, structural and petrographical information, have been used to establish a preliminary position for the long-sought-after Caples-Torlesse terrane boundary in the Otago Schist. The boundary has been involved in Late Mesozoic and Cenozoic deformation, follows a sinuous course near the schist axis for some 350km between Dunedin and the Barrier Range and divides the Aspiring lithologic association into Caples and Torlesse parts. A number of pods of ultramafic schist are exposed in the vicinity of the terrane boundary. The methods used in this paper may have application to the location of terrane boundaries in major schist belts elsewhere.


ISSN: 0016-7649
EISSN: 2041-479X
Coden: JGSLAS
Serial Title: Journal of the Geological Society of London
Serial Volume: 149, Part 6
Title: Geochemical evidence for the position of the Caples-Torlesse boundary in the Otago Schist, New Zealand
Affiliation: DSIR Geology & Geophysics, Lower Hutt, New Zealand
Pages: 967-977
Published: 199211
Text Language: English
Publisher: Geological Society of London, London, United Kingdom
References: 41
Accession Number: 1993-006502
Categories: Geochemistry of rocks, soils, and sedimentsStructural geology
Document Type: Serial
Bibliographic Level: Analytic
Illustration Description: illus. incl. 1 table, geol. sketch maps
Secondary Affiliation: Victoria University of Wellington, NZL, New Zealand
Country of Publication: United Kingdom
Secondary Affiliation: GeoRef, Copyright 2018, American Geosciences Institute. Reference includes data supplied by Institute of Geological and Nuclear Sciences Limited (GNS Science), Lower Hutt, New Zealand
Update Code: 1993
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