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Electron backscatter diffraction analysis and orientation mapping of monazite

Published online by Cambridge University Press:  05 July 2018

S. M. Reddy ,
C. Clark ,
N. E. Timms  and
B. M. Eglington
S. M. Reddy*
Affiliation:
The Institute for Geoscience Research, Department of Applied Geology, Curtin University, GPO Box U1987, Perth, WA 6845, Australia
C. Clark
Affiliation:
The Institute for Geoscience Research, Department of Applied Geology, Curtin University, GPO Box U1987, Perth, WA 6845, Australia
N. E. Timms
Affiliation:
The Institute for Geoscience Research, Department of Applied Geology, Curtin University, GPO Box U1987, Perth, WA 6845, Australia
B. M. Eglington
Affiliation:
Saskatchewan Isotope Laboratory, Geological Sciences, University of Saskatchewan, 114 Science Place, Saskatoon, SK S7N 5E2, Canada
*
*E-mail: S.Reddy@curtin.edu.au
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Abstract

Electron backscatter diffraction (EBSD) analysis of monazite requires a comparison of empirically collected electron backscatter patterns (EBSPs) with theoretical diffraction data, or ‘match units’, derived from known crystallographic parameters. Published crystallographic data derived from compositionally varying natural and synthetic monazite are used to calculate ten different match units for monazite. These match units are used to systematically index EBSPs obtained from four natural monazite samples with different compositions. Analyses of EBSD data, derived from the indexing of five and six diffraction bands using each of the ten match units for 10,000 EBSPs from each of the four samples, indicate a large variation in the ability of the different match units to correctly index the different natural samples. However, the use of match units derived from either synthetic Gd or Eu monazite crystallographic data yield good results for three of the four analysed monazites. Comparison of sample composition with published monazite compositions indicates that these match units are likely to yield good results for the EBSD analysis of metamorphic monazite. The results provide a clear strategy for optimizing the acquisition and analysis of EBSD data from monazite but also indicate the need for the collection of new crystallographic structure data and the subsequent generation of more appropriate match units for natural monazite.

Keywords

EBSDmicrostructuremonazitereflector filematch unitchemistry
Type
Research Article
Information
Mineralogical Magazine , Volume 74 , Issue 3 , June 2010 , pp. 493 - 506
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 2010

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References

Bingen, B., Demaiffe, D. and Hertogen, J. (1996) Redistribution of rare earth elements, thorium, and uranium over accessory minerals in the course of amphibolite to granulite facies metamorphism: The role of apatite and monazite in orthogneisses from southwestern norway. Geochimica et Cosmochimica Acta, 60, 1341–1354.CrossRefGoogle Scholar
Boatner, L.A. (2002) Synthesis, structure, and properties of monazite, pretulite, and xenotime. Pp. 87–121 in: Phosphates – Geochemical, Geobiological and Materials Importance (Kohn, M.L., Rakovan, J. and Hughes, J.M., editors). Reviews in Mineralogy and Geochemistry, 48, The Mineralogical Society of America, Washington D.C and The Geochemical Society, St. Louis, Missouri, USA.CrossRefGoogle Scholar
Cherniak, D.J., Watson, E.B., Grove, M. and Harrison, T.M. (2004) Pb diffusion in monazite: A combined rbs/sims study. Geochimica et Cosmochimica Acta, 68, 829–840.CrossRefGoogle Scholar
Chichagov, A.V., Varlamov, D.A., Dilanyan, R.A., Dokina, T.N., Drozhzhina, N.A., Samokhvalova, O.L. and Ushakovskaya, T.V. (2001) Mincryst: A crystallographic database for minerals, local and network (www) versions. Crystallography Reports, 46, 876–879.CrossRefGoogle Scholar
Clark, C., Mumm, A.S. and Faure, K. (2005) Timing and nature of fluid flow and alteration during Mesoproterozoicsh ear zone formation, Olary domain, South Australia. Journal of Metamorphic Geology, 23, 147–164.CrossRefGoogle Scholar
Clark, C., Hand, M., Kelsey, D.E. and Goscombe, B. (2007) Linking crustal reworking to terrane accretion. Journal of the Geological Society, 164, 937–940.CrossRefGoogle Scholar
Claves, S.R. and Deal, A. (2005) Orientation dependence of ebsd pattern quality. Microscopy and Microanalysis, 11, 514–515.CrossRefGoogle Scholar
Cocherie, A. and Albarède, F. (2001) An improved UTh- Pb age calculation for electron microprobe dating of monazite. Geochimica et Cosmochimica Acta, 65, 4509–4522.CrossRefGoogle Scholar
Corrie, S.L. and Kohn, M.J. (2008) Trace-element distributions in silicates during prograde metamorphic reactions: Implications for monazite formation. Journal of Metamorphic Geology, 26, 451–464.CrossRefGoogle Scholar
Finger, F., Broska, I., Roberts, M.P. and Schermaier, A. (1998) Replacement of primary monazite by apatiteallanite- epidote coronas in an amphibolite facies granite gneiss from the eastern alps. American Mineralogist, 83, 248–58.CrossRefGoogle Scholar
Förster, H.J. (1998) The chemical composition of REE-Y-Th-U-rich accessory minerals in peraluminous granites of the Erzgebirge-Fichtelgebirge region, Germany; Part I, the monazite-(ce)-brabantite solid solution series. American Mineralogist, 83, 1302–15.CrossRefGoogle Scholar
Franz, G., Andrehs, G. and Rhede, D. (1996) Crystal chemistry of monazite and xenotime from Saxothuringian-Moldanubian metapelites, NE Bavaria, Germany. European Journal of Mineralogy, 8, 1097.CrossRefGoogle Scholar
Ghouse, K.M. (1968) Refinement of the crystal structure of heat-treated monazite crystal. Indian Journal of Pure and Applied Physics, 6, 265–268.Google Scholar
Harrison, T.M., Catlos, E.J. and Montel, J.M. (2002) UTh- Pb dating of phosphate minerals. Pp. 523–558 in: Phosphates - Geochemical, Geobiological and Materials Importance (Kohn, M.L., Rakovan, J. and Hughes, J.M., editors). Reviews in Mineralogy and Geochemistry, 48, The Mineralogical Society of America, Washington D.C and The Geochemical Society, St. Louis, Missouri, USA.CrossRefGoogle Scholar
Hay, R.S. (2004) Climb-dissociated dislocations in monazite at low temperature. Journal of the American Ceramic Society, 87, 1149–1152.CrossRefGoogle Scholar
Hay, R.S. (2005) Twin-dislocation interaction in monazite (monoclinic lapo4). Philosophical Magazine, 85, 373–386.CrossRefGoogle Scholar
Kelsey, D.E., Clark, C. and Hand, M. (2008) Thermobarometric modelling of zircon and monazite growth in melt-bearing systems: Examples using model metapelitic and metapsammitic granulites. Journal of Metamorphic Geology, 26, 199–212.CrossRefGoogle Scholar
Kohn, M.J., Wieland, M.S., Parkinson, C.D. and Upreti, B.N. (2005) Five generations of monazite in Langtang gneisses: Implications for chronology of the Himalayan metamorphicc ore. Journal of Metamorphic Geology, 23, 399–406.CrossRefGoogle Scholar
Lloyd, G.E. and Freeman, B. (1994) Dynamic recrystallization of quartz under greenschist facies conditions. Journal of Structural Geology, 16, 867–81.CrossRefGoogle Scholar
Montel, J.M. (1993) A model for monazite/melt equilibrium and application to the generation of graniticmagmas. Chemical Geology, 110, 127–146.CrossRefGoogle Scholar
Montel, J.M., Foret, S., Veschambre, M., Nicollet, C. and Provost, A. (1996) Electron microprobe dating of monazite. Chemical Geology, 131, 37–53.CrossRefGoogle Scholar
Moser, D.E., Davis, W.J., Reddy, S.M., Flemming, R.L. and Hart, R.J. (2009) Zircon U-Pb strain chronometry reveals deep impact-triggered flow. Earth and Planetary Science Letters, 277, 73–79.CrossRefGoogle Scholar
Nemchin, A., Timms, N., Pidgeon, R., Geisler, T., Reddy, S. and Meyer, C. (2009) Timing of crystallization of the lunar magma ocean constrained by the oldest zircon. Nature Geoscience, 2, 133–136.CrossRefGoogle Scholar
Ni, Y., Hughes, J.M. and Mariano, A.N. (1995) Crystal chemistry of the monazite and xenotime structures. American Mineralogist, 80, 21–26.CrossRefGoogle Scholar
Prior, D.J., Boyle, A.P., Brenker, F., Cheadle, M.C., Day, A., Lopez, G., Peruzzo, L., Potts, G.J., Reddy, S., Spiess, R., Timms, N.E., Trimby, P., Wheeler, J. and Zetterström, L. (1999) The application of electron backscatter diffraction and orientation contrast imaging in the SEM to textural problems in rocks. American Mineralogist, 84, 1741–1759.CrossRefGoogle Scholar
Prior, D.J., Wheeler, J., Peruzzo, L., Spiess, R. and Storey, C. (2002) Some garnet microstructures: An illustration of the potential of orientation maps and misorientation analysis in microstructural studies. Journal of Structural Geology, 24, 999–1011.CrossRefGoogle Scholar
Pyle, J.M. and Spear, F.S. (2003) Four generations of accessory-phase growth in low-pressure migmatites from SW New Hampshire. American Mineralogist, 88, 338–351.CrossRefGoogle Scholar
Pyle, J.M., Spear, F.S., Wark, D.A., Daniel, C.G. and Storm, L.C. (2005) Contributions to precision and accuracy of monazite microprobe ages. American Mineralogist, 90, 547–577.CrossRefGoogle Scholar
Rapp, R.P. and Watson, E.B. (1986) Monazite solubility and dissolution kinetics: Implications for the thorium and light rare earth chemistry of felsic magmas. Contributions to Mineralogy and Petrology, 94, 304–316.CrossRefGoogle Scholar
Rasmussen, B., Fletcher, I.R. and Muhling, J.R. (2007) In situ U-Pb dating and element mapping of three generations of monazite: Unravelling cryptic tectonothermal events in low-grade terranes. Geochimica et Cosmochimica Acta, 71, 670–690.CrossRefGoogle Scholar
Reddy, S.M., Timms, N.E., Trimby, P., Kinny, P.D., Buchan, C. and Blake, K. (2006) Crystal-plastic deformation of zircon: A defect in the assumption of chemical robustness. Geology, 34, 257–260.CrossRefGoogle Scholar
Reddy, S.M., Timms, N.E., Pantleon, W. and Trimby, P. (2007) Quantitative characterization of plastic deformation of zircon and geological implications. Contributions to Mineralogy and Petrology, 153, 625–645.CrossRefGoogle Scholar
Reddy, S.M., Timms, N.E. and Eglington, B.M. (2008) Electron backscatter diffraction analysis of zircon: A systematic assessment of match unit characteristics and pattern indexing optimization. American Mineralogist, 93, 187–197.CrossRefGoogle Scholar
Reddy, S.M., Timms, N.E., Hamilton, P.E. and Smyth, H.R. (2009) Deformation-related microstructures in magmaticzirc on and implications for diffusion. Contributions to Mineralogy and Petrology, 157, 231–244.CrossRefGoogle Scholar
Rubatto, D., Hermann, J. and Buick, I. (2006) Temperature and bulk composition control on the growth of monazite and zircon during low-pressure anatexis (Mount Stafford, central Australia). Journal of Petrology, 47, 1973–1996.CrossRefGoogle Scholar
Timms, N.E. and Reddy, S.M. (2009) Response of cathodoluminescence to crystal-plastic deformation in zircon. Chemical Geology, 261, 11–23.CrossRefGoogle Scholar
Timms, N., Kinny, P. and Reddy, S. (2006) Enhanced diffusion of uranium and thorium linked to crystal plasticity in zircon. Geochemical Transactions, 7, 10.CrossRefGoogle Scholar
Wilby, P.R., Page, A.A., Zalasiewicz, J.A., Milodowski, A.E., Williams, M. and Evans, J.A. (2007) Syntectonic monazite in low-grade mudrocks: A potential geochronometer for cleavage formation? Journal of the Geological Society, 164, 53–56.CrossRefGoogle Scholar
Williams, M.L. and Jercinovic, M.J. (2002) Microprobe monazite geochronology: Putting absolute time into microstructural analysis. Journal of Structural Geology, 24, 1013–1028.CrossRefGoogle Scholar
Williams, M.L., Jercinovic, M.J. and Terry, M.P. (1999) Age mapping and dating of monazite on the electron microprobe; deconvoluting multistage tectonic histories. Geology, 27, 1023–1026.2.3.CO;2>CrossRefGoogle Scholar
Williams, M.L., Jercinovic, M.J., Goncalves, P. and Mahan, K. (2006) Format and philosophy for collecting, compiling and reporting microprobe monazite ages. Chemical Geology, 225, 1–15.CrossRefGoogle Scholar
Wyckoff, R.W.G. (1963) Crystal Structures. Wiley, New York.Google Scholar
Zhang, S., Karato, S., Fitz Gerald, J., Faul, U.H. and Zhou, Y. (2000) Simple shear deformation of olivine aggregates. Tectonophysics, 316, 133–152.CrossRefGoogle Scholar
Zhu, X.K. and O’Nions, R.K. (1999) Zonation of monazite in metamorphic rocks and its implications for high temperature thermochronology: A case study from the Lewisian terrain. Earth and Planetary Science Letters, 171, 209–20.CrossRefGoogle Scholar
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