The petrology, genesis and alteration of aluminosilicate bearing schists and gneisses at Springfield, near Williamstown, South Australia
| dc.contributor.author | Ringenbergs, W. H. | |
| dc.contributor.school | School of Physical Sciences | en |
| dc.coverage.spatial | Kanmantoo Trough, Eastern Mt Lofty Ranges, South Australia | |
| dc.date.issued | 1975 | |
| dc.description | This item is only available electronically. | en |
| dc.description.abstract | The high grade aluminosilicate bearing schists and gneisses are believed to be due to prograde regional metamorphism to T 600-700oC, P 4-6kb under falling potassium activity. This leads to dealkalisation of K-feldspars and immediately precedes or accompanies the F2 deformation. Shearing also seems an important genetic control. The dominant rock types are subdivided: 1. Aldgate Sandstone Equivalent 2. High Grade (sillimanite) zone Sillimanite Quartz Gneiss Kyanite Quartz Gneiss Muscovite Quartz Gneiss Kyanite Muscovite Kaolinite Shear rocks Schists (coarse) Tremolite marker horizon 3. Kyanite Andalusite zone Sandstones, Marbles, Schists, and Calc-silicate rocks The retrogression of the aluminosilicates took place in two distinct steps. Preceding the F3 deformation and associated with initial stages of thrusting, muscovitisation occurred, producing green muscovites (referred to by Alderman as Damourite) and sericite pods in the high grade schists. Introduction of potassium and water was involved. Following the F3 deformation kaolinisation of sillimanite and K-feldspar occurs. This is a low temperature hydrothermal alteration. X-Ray diffraction studies demonstrate the equivalence of the green muscovite and sericite and show the alteration of sillimanite to kaolinite. | en |
| dc.description.dissertation | Thesis (B.Sc.(Hons)) -- University of Adelaide, School of Physical Sciences, 1975 | |
| dc.identifier.uri | https://hdl.handle.net/2440/140945 | |
| dc.language.iso | en | en |
| dc.provenance | This electronic version is made publicly available by the University of Adelaide in accordance with its open access policy for student theses. Copyright in this thesis remains with the author. This thesis may incorporate third party material which has been used by the author pursuant to Fair Dealing exceptions. If you are the author of this thesis and do not wish it to be made publicly available, or you are the owner of any included third party copyright material you wish to be removed from this electronic version, please complete the take down form located at: http://www.adelaide.edu.au/legals | en |
| dc.subject | Honours; Geology; prograde metamorphism; andalusite; kyanite; sillimanite; muscovite; calc-silicates; deformation; retrograde metamorphism; kaolinisation | en |
| dc.title | The petrology, genesis and alteration of aluminosilicate bearing schists and gneisses at Springfield, near Williamstown, South Australia | en |
| dc.type | Thesis | en |
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