Quick Search:    advanced search

GSW Home   GeoRef Home   My GSW Alerts   Contact GSW   About GSW   Journals List   Help

This Article Full Text Full Text (PDF) Alert me when this article is cited Alert me if a correction is posted Citation Map Services Email this article to a friend Similar articles in this journal Similar articles in ISI Web of Science Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via HighWire Citing Articles via ISI Web of Science (2) Citing Articles via Google Scholar Google Scholar Articles by KAWACHI, Y. Articles by HINTON, R. W. Search for Related Content GeoRef GeoRef Citation

The anhydrous amphibole ungarettiite from the Woods mine, New South Wales, Australia

¹ Geology Department, University of Otago, Dunedin, New Zealand
^* Current address: Yukari Ichibangai 2–408, Izumicho 3 Chome16Kokubunji185-0024, Japan
² Department of Earth Sciences, Cardiff University, PO Box 914, Cardiff, CF1 3YE, Wales, United Kingdom
³ Department of Geology and Geophysics, University of Edinburgh, West Mains Road, Edinburgh, EH9 3JW, Scotland, United Kingdom

^** Corresponding author, e-mail: doug.coombs{at}stonebow.otago.ac.nz

We report ungarettiite from the Woods mine, New South Wales, Australia; this is the second known occurrence. Electron-microprobe and ion-probe analyses show it to be very close to end-member composition, NaNa₂Mn²⁺₂Mn³⁺₃Si₈O₂₂O₂. We record the first direct determination of H₂O (<60ppm) in this anhydrous amphibole, together with F (53ppm) and Cl (5ppm), giving (OH+F+C1) a maximum of0.01 sites per formula unit. Li, 4 ppm, and other trace elements are reported, most of them for the first time. Like various associated minerals, it contains very low to negligible Al, Mg, and Ca. Fe varies from below detection by EMP analysis to about 0.35 atoms p.f.u. Fe is strongly partitioned into any associated manganian aegirine.

Key-words: ungarettiite, amphibole, Woods mine, manganese mineral, ion-probe analyses.

This article has been cited by other articles:

				R. Oberti, F. C. Hawthorne, E. Cannillo, and F. Camara Long-Range Order in Amphiboles Reviews in Mineralogy and Geochemistry, October 1, 2007; 67(1): 125 - 171. [Full Text] [PDF]

				D. S. COOMBS, Y. KAWACHI, H. MIURA, and D. CHAPPELL Cerchiaraite and Ca-bearing noelbensonite from Woods mine, New South Wales, Australia European Journal of Mineralogy, February 1, 2004; 16(1): 185 - 189. [Abstract] [Full Text] [PDF]