Hostname: page-component-78c5997874-s2hrs Total loading time: 0 Render date: 2024-11-09T16:20:17.909Z Has data issue: false hasContentIssue false

Microscopic analysis of magmatic crystals - Part 2: A SEM study of the stability of accessory zircon under increasing metamorphic conditions

Published online by Cambridge University Press:  14 March 2018

Robert Sturm*
Affiliation:
Department of Materials Engineering and Physics, University of Salzburg/Austria

Extract

Core share and HTML view are not available for this content. However, as you have access to this content, a full PDF is available via the ‘Save PDF’ action button.

This contribution is a continuation of a previously published work in Microscopy Today that described the microscopic analysis of magmatic crystal growth by the example of accessory zircon. Zircon does not only represent a remarkable mineral phase concerning its crystallization out of the magmatic melt, but has also other interesting characteristics, one of which is the rather high physical stability of zircon allowing a determination of the mineral—even in high-grade metamorphic rocks. The changes of zircon from low- to high-grade deformation are very noticable and therefore offer an interesting operating field for electron microscopy. Since crystal microscopy and its specific fascination cannot often be found in a microscopy magazine, it is assumed that the article would awake the interest of the readers.

Type
Research Article
Copyright
Copyright © Microscopy Society of America 2007

References

(1) Sturm, R. (2007): Analyzing the Growth of Magmatic Crystals - An Electron Microprobe Analysis Study. Microscopy Today 15/3, 3641.Google Scholar
(2) Pupin, J. P. (1980): Zircon and granite petrology. Contrib. Mineral. Petrol. 73, 207220.CrossRefGoogle Scholar
(3) Steyrer, H. P., Sturm, R. (2002): Stability of zircon in a low-grade ultramylonite and its utility for chemical mass balancing: the shear zone at Miéville, Switzerland. Chem. Geol. 187, 119.Google Scholar
(4) Poldervaart, A. (1956): Zircon in rocks: 2. Igneous rocks. Am. J. Sci. 254, 521554.CrossRefGoogle Scholar
(5) Frasl, G. (1963): Die mikroskopische Untersuchung der akzessorischen Zirkone als eine Routinearbeit des Kristallingeologen. Jb. Geol. B.-A. 106, 405428.Google Scholar
(6) Wayne, D. M., Sinha, A. K. (1988): Physical and chemical response of zircons to deformation. Contrib. Miner. Petrol. 98, 109121.CrossRefGoogle Scholar
(7) Sturm, R. (1999): Physical and Chemical Changes of Zircons during the Formation of Mylonites: An Example from the Austrian Moldanubicum. N. Jb. Miner. Mh. 1999(4), 181192.Google Scholar
(8) Bohor, B. F., Betterton, W. J., Krogh, T. E. (1993): Impact-shocked zircons: discovery of shock-induced textures reflecting increasing degrees of shock metamorphism. EPSL 119, 419424.Google Scholar
(9) Boullier, A. M. (1980): A preliminary study on the behaviour of brittle minerals in a ductile matrix: example of zircons and feldspars. J. Struct. Geol. 2, 211217.CrossRefGoogle Scholar
(10) Peucat, J. J., Tisserant, D., Caby, R., Clauer, N. (1985): Resistance of zircons to U-Pb resetting in a prograde metamorphic sequence of Caledonian age in East Greenland. Can. J. Earth Sci. 22, 330338.Google Scholar
(11) Yardley, B. W. D. (1989): An Introduction to Metamorphic Petrology. Longman Scientific & Technical, London.Google Scholar