RT Journal Article
T1 Visualization of elastic strain fields by the spatial distribution of the blue luminescence in a twinned microcline crystal
A1 Sanchez Muñoz, L.
A1 Correcher Delgado, Virgilio
A1 Turrero Jiménez, María Jesús
A1 Cremades Rodríguez, Ana Isabel
A1 García Guinea, Javier
AB This paper correlates the mineralogical characteristics of twinning and exsolutions of a microcline giant crystal with macroscopic twin-domains and perthitic texture, taken from the Golconda III granitic pegmatite ( Minas Gerais, Brazil), with the spatial distribution of the blue luminescence from radiation-induced O- defects. The twinning macrostructure and the Na distribution of the microcline have been studied by optical microscopy, backscattered electron scanning electron microscopy (SEM), chemical mapping and quantitative chemical analyses with electron microprobe. Spectra luminescence data were recorded by high sensitivity thermoluminescence, X-ray radioluminescence, cathodoluminescence ( CL) and also CL-imaging under optical microscope at room temperature, and under SEM at liquid nitrogen temperature. The crystal recorded three different stages of re-equilibration during the geological cooling: ( 1) building up of regular macrostructures, formed mainly by only two Albite-twin law orientation variants, by solid-state domain self-assembly; ( 2) coarsening of one orientation variant at the expenses of the other by dissolution - reprecipitation reactions and ( 3) later degradation of regular twins into irregular domains. The spatial distribution of the blue luminescence in microcline can be used for two practical applications: ( 1) to mark water-rich fluid-flow channelways at low temperatures in which these light emissions are absent and ( 2) to visualize elastic strain fields across twin patterns, with maxima emission from the Na-rich ( 0 1 0) boundaries and remnants Pericline twin cores and minima from the Na-poor ( 0 1 0) twin cores and residual Pericline boundaries. Elastic strain must be the physical factor determining the radiation sensitivity of the lattice, i.e. radiation damage is not random in twinned lattices and defect formation occurs preferentially at the sites with high local elastic strain. Environmental ionizing radiation could involve a twofold effect during subsolidus microcline re-equilibration, i.e. Si/Al re-ordering, mainly acting on coherent twin boundaries, and also producing reactive H center dot and OH center dot radicals as radiolytic products of water.
PB Springer
SN 0342-1791
YR 2006
FD 2006-11
LK https://hdl.handle.net/20.500.14352/50838
UL https://hdl.handle.net/20.500.14352/50838
LA eng
NO Bøtter-Jensen L, McKeever SWS, Wintle AG (2003)  Optically stimulated luminescence dosimetry. Elsevier, Amsterdam, pp 188–234Brown WL, Parsons I (1989) Alkali feldspars: ordering rates, phase transformations and behaviour diagrams for igneous rocks. Mineral Mag 53:25–42Cerný P (1994) Evolution of feldspars in granitic pegmatites. In: Parsons I (eds) Feldspars and their reactions. NATO-ASI Series C 421. D. Reidel Publishing Company, Dordrecht, pp. 501–540Correcher V, García-Guinea J (2001) On the   luminescence properties of adularia feldspar. J Luminescence 93:303–312Correcher V, Garcı´a-Guinea J, Delgado A, Sánchez-Muñoz L (1999) Spectra thermoluminescence emissions and continuous trap distribution of a cross-hatch twinned low microcline. Radiat Prot Dosim 84:503–506Eggleton RA, Buseck PR (1980) The orthoclase-microcline inversion: a high-resolution transmission electron microscope study and strain analysis. Contrib Mineral Petrol 74:123–133Finch AA, Klein J (1999) The causes and petrological significance of cathodoluminescence emissions from alkali feldspars. Contrib Mineral Petrol 135:234–243Finch AA, Hole DE, Townsend PD (2003) Orientation dependence of luminescence in plagioclase. Phys Chem Miner 30:373–381Fitz Gerald JD, McLaren AC (1982) The microstructures of microcline from granitic rocks and pegmatites. Contrib Mineral Petrol 80:219–229García-Guinea J, Townsend PD, Sánchez-Muñoz L, Rojo JM (1999) Ultraviolet-blue ionic luminiscence of alkali feldspars from bulk and interfaces. Phys Chem Miner 26:658–668Goldsmith (1988) Enhanced Al/Si diffusion in KAlSi3O8 at high pressures: the effect of hydrogen. J Geol 96:109–124Gö tze J, Habermann D, Kempe U, Neuser RD, Richter DK (1999a) Cathodoluminescence microscopy and spectroscopy of plagioclases from lunar soil. Am Mineral 84:1027–1032Gó tze J, Habermann D, Neuser RD, Richter DK (1999b) Highresolution spectrometric analysis of rare earth elementsactivated cathodoluminescence in feldspar minerals. Chem Geol 153:81–91Hashimoto T, Nishiyama E, Yanarawa Y (2003) Radiationinduced luminescence and hydrogen radical formation associated with thermal annealing treatments on feldspars. J Radioanal Nucl Chem 255:81–85Hofmeister AM, Rossman GR (1985) A model for the irradiative coloration of smoky feldspars and the inhibiting influence of water. Phys Chem Miner 12:324–332Jain M, Bøtter-Jensen L, Murray AS, Denby PM, Tsukamoto S, Gibling MR (2005) Revisiting TL: dose measurement beyond the OSL range using SAR. Anc TL 23:9–24Laves F (1950) The lattice and twinning of microcline and other potash feldspars. J Geol 58:548–571Lee WT, Salje EKH, Bismayer U (2003) Domain-wall structure and domain-wall strain. J Appl Phys 93:9890–9897Martin RF (1988) The K-feldspar mineralogy of granites and rhyolites: a generalized case of pseudomorphism of the magmatic phase. Rend Soc Ital Miner Petrol 43:343– 354Matyash IV, Bagmut NN, Litovchenko AS, Proshko VYa (1982) Electron paramagnetic resonance study of new paramagnetic centres in microcline–perthites from pegmatites. Phys Chem Miner 8:149–152Petrov I, Agel A, Hafner SS (1989) Distinct defect centres at oxygen positions in albite. Am Mineral 74:1130–1141Prior DJ, Boyle AP, Brenker F, Cheadle MC, Day A, Lopez G,Peruzzo L, Potts GJ, Reddy S, Spiess R, Timms NE, Trimby P, Wheeler J, Zetterstrom L (1999) The application of electron backscatter diffraction and orientation contrast imaging in the SEM to textural problems in rocks. Am Mineral 84:1741–1759Salje EKH, Buckley A, Van Tendeloo G, Ishibashi Y, Nord GL (1998) Needle twins and right-angled twins in minerals: comparison between experiment and theory. Am Mineral 83:811–822Sánchez-Muñoz L, Nistor L, Van Tendeloo G, Sanz J (1998) Modulated structures in KAlSi3O8: a study by high resolution electron microscopy and 29Si MAS-NMR spectroscopy. J Electron Microsc 47:17–28Sánchez-Muñoz L, García-Guinea J, Sanz J, Correcher V,Delgado A (2006a) Ultraviolet luminescence from defectscomplexes in the twin boundaries of K-feldspars. ChemMater 18:3336–3342Sánchez-Muñoz L, Guinea JG, Correcher V, Sanz J (2006b) Static and dynamic regimes in the structural evolution of perthitic microcline. Bol Soc Esp Ceram V 45:289–299Sánchez-Muñoz L, Rouer O, Sanz J, García-Guinea J (2006c) Mechanism of construction–destruction of macrostructural patterns in perthitic microclines as complex systems. Bol Soc Esp Ceram V 45:321–329Smith JV (1974) Feldspar minerals. Springer, Berlin  Heidelberg New YorkSpeit B, Lehmann G (1982) Radiation defects in feldspars. Phys Chem Miner 8:77–82Waldron K, Parsons I, Brown WL (1993) Solution-redeposition and the orthoclase–microcline transformation—evidence from granulites and relevance to O-18 exchange. Mineral Mag 57:687–695Walker FDL, Martin RL, Parsons I (1995) Micropores and micropermeable textures in alkali feldspars: geochemical and geophysical implications. Mineral Mag 59:505–534White JC, Barnett RL (1990) Microstructural signatures and glide twins in microcline, Hemlo, Ontario. Can Mineral 28:757–769Yacobi BG, Jagannath C, Zenon S (1988) Stress variations and relief in patterned GaAs grown on mismatched substrates. Appl Phys Lett 52:555–557
NO © Springer-Verlag 2006.Acknowledgments We are grateful to P.D. Townsend for the analyses in the high-sensitivity TL spectrometer of Sussex (UK), to M.L. Clarke for recording the 3D-plot TL measurements, to Olivier Rouer for the EMPA analyses and the X-ray map forsodium. The experiment was supported by the C.I.C.Y.T. CGL2004-03564/BTE and Comunidad Autónoma de Madrid S-0505/MAT/0094 (MATERNAS) projects. The present study was benefited from discussion with Adrian Finch (University of St Andrews, UK) and Masanori Kurosawa (University of Tsukuba, Japan). Thanks are also due to Odulio José Marensi de Moura (Governador Valadares, Minas Gerais, Brazil) for the valuable help in sample collection in the Golconda III pegmatite in 1989.
NO C.I.C.Y.T.
NO Comunidad Autónoma de Madrid
DS Docta Complutense
RD 2 may 2024