Tab. 1 Analyses of major phases in Vestgötabreen formation schists ...

The glaucophane schists of Oscar II Land, it has been suggested, originated in a compressive plate boundary subduction zone environment. An alternative hypothesis is presented here linking the metamorphism of these schists with that of the surrounding pre-Carboniferous rocks. It has been estimated f...

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Bibliographic Details
Main Author: Manby, G M
Format: Dataset
Language:English
Published: PANGAEA 1978
Subjects:
Minerals
Silicon dioxide
Titanium dioxide
Aluminium oxide
Iron oxide, FeO
Manganese oxide
Magnesium oxide
Calcium oxide
Potassium oxide
Sodium oxide
Elements, total
Geological profile sampling
Cambridge E.D.S. electron probe microanalyser
Oscar II
Oscar II Land
Svalbard
Vestgötabreen
Online Access:https://dx.doi.org/10.1594/pangaea.743267
https://doi.pangaea.de/10.1594/PANGAEA.743267
Description
Summary:The glaucophane schists of Oscar II Land, it has been suggested, originated in a compressive plate boundary subduction zone environment. An alternative hypothesis is presented here linking the metamorphism of these schists with that of the surrounding pre-Carboniferous rocks. It has been estimated from mineralogical and textural relationships that at the time of metamorphism these rocks exceeded 30 km in thickness. Similarly, an ambient geothermal gradient of 15° C/km has been calculated for the now exposed succession. Pressures of sufficient magnitude would be realised near the base of this geosynclinal pile to produce eclogite from rocks of basic composition. Subsequent synmetamorphic penetrative deformation would give rise to glaucophane and greenschist facies assemblages. ... : Supplement to: Manby, G M (1978): Aspects of Caledonian metarnorphism in central western Svalbard with particular reference to the Glaucophane schists of Oscar II Land. Polarforschung, 48(1/2), 92-102 ...

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