caa a22 4500 465791727 CHVBK 20180323112026.0 cr unu---uuuuu 170327e19901001xx s 000 0 eng 10.1007/BF00302490 doi (NATIONALLICENCE)springer-10.1007/BF00302490 Sheet silicates of the Lawler Peak granite, Arizona: chemistry, structural variations, and exsolution [Elektronische Daten] [Embaie Ferrow, David London, Kathleen Goodman, David Veblen] Coarse-grained muscovite, biotite, and chlorite from the Lawler Peak granite, Yavapai County, Arizona, have been studied with electron microprobe analysis, powder X-ray diffraction, transmission electron microscopy (TEM), electron diffraction, and analytical TEM methods. All three sheet silicates exhibit multiple polytypes and an abundance of stacking faults and dislocations. Chlorite formed by subsolidus replacement of biotite. Muscovite also may have formed by replacement of biotite and other minerals, but there is no clear microstructural evidence to support either a primary or secondary origin for the coarse-grained muscovite. X-ray and electron diffraction reveal that the muscovite consists of two separate phases, which give rise to splitting of diffraction maxima. TEM experiments suggest that the two components resulted from exsolution, which produced two symmetry-related sets of irrationally oriented lamellae with a wavelength averaging about 10 nm. Exsolution occurred in both 1M and 2M1 muscovite. Although the lamellae are too small to analyze directly, the muscovite bulk composition and structural data are consistent with the separation of celadonitic and muscovite components. Springer-Verlag, 1990 Ferrow Embaie Geologiska Institutionen, Universitetet i Lund, Sölvegatan 13, 223 62, Lund, Sweden aut London David School of Geology and Geophysics, University of Oklahoma, 73019, Norman, OK, USA aut Goodman Kathleen School of Geology and Geophysics, University of Oklahoma, 73019, Norman, OK, USA aut Veblen David Department of Earth and Planetary Sciences, The Johns Hopkins University, 21218, Baltimore, MD, USA aut Contributions to Mineralogy and Petrology Springer-Verlag 105/5(1990-10-01), 491-501 0010-7999 105:5<491 1990 105 410 https://doi.org/10.1007/BF00302490 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF00302490 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Ferrow Embaie Geologiska Institutionen, Universitetet i Lund, Sölvegatan 13, 223 62, Lund, Sweden aut NATIONALLICENCE 700 1- London David School of Geology and Geophysics, University of Oklahoma, 73019, Norman, OK, USA aut NATIONALLICENCE 700 1- Goodman Kathleen School of Geology and Geophysics, University of Oklahoma, 73019, Norman, OK, USA aut NATIONALLICENCE 700 1- Veblen David Department of Earth and Planetary Sciences, The Johns Hopkins University, 21218, Baltimore, MD, USA aut NATIONALLICENCE 773 0- Contributions to Mineralogy and Petrology Springer-Verlag 105/5(1990-10-01), 491-501 0010-7999 105:5<491 1990 105 410 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer