A petrofabric study of the Falcon Lake stock, Eastern Manitoba

Simple item page
dc.contributor.authorHaugh, Ian.en_US
dc.date.accessioned2009-12-01T16:48:55Z
dc.date.available2009-12-01T16:48:55Z
dc.date.issued1963en_US
dc.degree.disciplineGeologyen_US
dc.degree.levelMaster of Science (M.Sc.)en_US
dc.description.abstractAn investigation has been carried out to determine the degree of preferred orientation shown by both plagioclase and quartz crystals in rocks from the eastern half of the Falcon Lake Stock. For the plagioclase crystals, the orientation of the (O1O) composition planes of albite twinning was determined. These (O1O) planes, parallel to the largest faces of the lath-shaped crystals, were found to show a strongly preferred orientation. This planar parallelism has been related to alignment of the crystals in primary flow layers within the stock. The flow layers in the quartz monzonite core were found to be steeply inclined, possibly as a result of re-orientation of a pre-existing plagioclase "mesh" by upward streaming of an acidic differentiate; the mechanism suggested Brownell (1941) to explain the formation of the core. In the outer parts of the stock, there appears to be an arch of flow layers. A close relationship has been found to exist between the orientation of the quartz c-axes and the inferred attitudes of the flow layers. In general the majority of the quartz axes are consistently contained within the plane of the flow layers and most of the axes are also horizontal. It is suggested that the quartz grains assumed their preferred orientation as they crystallized, in response to a prolongation of the forces which originally propelled the magma upwards. It would appear that their orientation was also influenced by the pre-existing framework of plagioclase crystals which had already been aligned within parallel flow layers.en_US
dc.format.extentvii, 85 leaves :en_US
dc.format.extent3984054 bytes
dc.format.mimetypeapplication/pdf
dc.identifierocm72775896en_US
dc.identifier.urihttp://hdl.handle.net/1993/3386
dc.language.isoengen_US
dc.rightsopen accessen_US
dc.rightsThe reproduction of this thesis has been made available by authority of the copyright owner solely for the purpose of private study and research, and may only be reproduced and copied as permitted by copyright laws or with express written authorization from the copyright owner.en_US
dc.titleA petrofabric study of the Falcon Lake stock, Eastern Manitobaen_US
dc.typemaster thesisen_US
local.subject.manitobayesen_US
Files
Original bundle
Now showing 1 - 1 of 1
Thumbnail Image
Name:
Haugh, A Petrofabric Study.pdf
Size:
3.8 MB
Format:
Adobe Portable Document Format
Description:
Download
Collections
FGS - Electronic Theses and Practica
Manitoba Heritage Theses