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dc.contributor.authorTrembath, Lowell Thomasen_US
dc.date.accessioned2012-05-09T20:17:46Z
dc.date.available2012-05-09T20:17:46Z
dc.date.issued1962en_US
dc.identifierocm72808106en_US
dc.identifier.urihttp://hdl.handle.net/1993/5428
dc.description.abstractSodium and potassium contents of 35 igneous and metamorphic rock specimens from the Moak-Thompson area were determined by flame photometer. Potassium feldspars were separated from the rocks and obliquities (triclinicities) of the mineral estimated from X-ray powder photographs. For a number of specimens an increase in obliquity may be correlated with an increase in the ratio K felspar:total alkali feldspar with a monoclinic K feldspar occurring in a rock with ~ 23 mole % K feldspar of the total alkali feldspar and a maximum microcline in a rock with ~ 67 mole % K feldspar of the total alkali feldspar. It is suggested that there is a microcline series extending over the composition range ~ 23 - 67 mole % K feldspar of the alkali feldspar diagram, and a phase diagram is proposed. A modification of the phase diagram for very high water pressures is proposed to account for the occurrence of microclines with a given obliquity in igneous rocks of differing alkali compositions. An orthoclase-low albite phase diagram is proposed to account for the orthoclase-cryptoperthite series... The study suggests a possible way of distinguishing between igneous and metamorphic rocks.en_US
dc.format.extentii, 53 leaves :en_US
dc.language.isoengen_US
dc.rightsen_US
dc.rightsinfo:eu-repo/semantics/openAccess
dc.titleA study of the potassium feldspare in some igneous and metamorphic rocks from the Moak-Thompson map area, Manitobaen_US
dc.typeinfo:eu-repo/semantics/masterThesis
dc.typemaster thesisen_US
dc.degree.disciplineGeologyen_US
dc.degree.levelMaster of Science (M.Sc.)en_US
local.subject.manitobayesen_US


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