X-ray and optical observations on the K-feldspars from the Ragunda area, central Sweden.
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X-ray and optical observations on the K-feldspars from the Ragunda area, central Sweden. by Karl-Axel KornfaМ€lt

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Published by Svenska reproduktions AB (distr.) in Stockholm .
Written in English

Subjects:

Places:

  • Sweden,
  • Ragunda region.

Subjects:

  • Feldspar -- Sweden -- Ragunda region.,
  • Petrology -- Sweden -- Ragunda region.

Book details:

Edition Notes

Bibliography: p. 25-26.

SeriesSveriges geologiska undersökningen. Ser. C. Avhandlingar och uppsatser, 636, Ser. C--Avhandlingar och uppsatser ;, nr. 636.
Classifications
LC ClassificationsQE282 .A3 ser. C., no. 636
The Physical Object
Pagination33 p.
Number of Pages33
ID Numbers
Open LibraryOL5722659M
LC Control Number70426954

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Buy X-ray and optical observations on the K-feldspars from the Ragunda area, central Sweden (Sveriges geologiska undersokningen. Ser. C. Avhandlingar och uppsatser, ) by Karl-Axel Kornfalt (ISBN:) from Amazon's Book Store. Everyday low prices and free delivery on eligible imeldaclyde.com: Karl-Axel Kornfalt. THE DETERMINATION OF FELDSPARS IN MUDROCKS USING AN X-RAY POWDER DIFFRACTION METHOD P. M. FELLOWS AND D. A. SPEARS Department of Geology, University of Sheffield, Sheffield, England (Received 6 May ) Almtraet--Low albite and maximum microcline were the two feldspars identified in Coal Measures mudrocks. Standard. A new classification of feldspars by luminescence spectral techniques J. GARCIA-GUINEA1, L. SANCHEZ-MU OZ 2 & V. CORRECHER 2 1Museo Nacional Ciencias Naturales, C/ Jose Gutierrez Abascal 2 Madrid Spain, [email protected] 2 D . Dickson, F.W. (), Growth of K-feldspars and plagioclase by replacement processes in rock of the Papoose Flat pluton and in country rocks, Inyo Mountains, California: Geol. Soc. Amer. Spec. Papers , Abstract for

The spread of the () and (l5l) Potassium feldspars structurally intermediate between microcline and sanidine reflections is principally a measure of y*. The triclinicity cannot in general be used as a measure of triclinic geometry; for example, a sizeable change m a* may have but little effect on A'9'.Cited by: Optical dating of quartz and feldspars: A comparative study from Wonderkrater, a Middle Stone Age site of South Africa Article in Quaternary Geochronology – · July with 67 Reads. A protocol for optical dating of potassium-rich feldspar (K-feldspar) is proposed. It utilizes the infrared stimulated luminescence (IRSL) signal measured by progressively increasing the. A series between Albite and Anorthite Feldspar Group. Alternate name for the plagioclase series of feldspars. In petrology, the plagioclase series are defined based on their percentage of .

In this study we utilize whole-rock chemical data, mineral compositions, X-ray compositional maps, isotopic microanalysis, and crystal size distributions of K-feldspar megacrysts to investigate the origin of these rhyolites and trachytes and the relationship between mafic and silicic volcanism in the Emeishan LIP. 2. Emeishan large igneous provinceCited by: 3. 10 Geological Survey of Finland, Bulletin X-ray and optical observations on the K-feldspars from the Ragunda area, Central Sweden. Sveriges Geol. Unders., Sero C, r. ; Arsbok 33 p. Kouvo, OLAVI () Radioactive ages of some Finnisb pre-Cambrian minerals. Bull. nicity values as indicated by X-ray powder methods (GOLDSMITH and LAVES, ) are approximately for Gl and G2 feldspars. For the G3 feldspar the triclinicity value is as high as , indicating a much more ordered structure for the latter. Samples to are different transitional stages between Gl and G2 feldspars.