Contribution
Minerals in the arrojadite, alluaudite and jahnsite–whiteite groups from the Mount Wills pegmatite field, Victoria, Australia
Birch, William D.
European Journal of Mineralogy Volume 30 Number 3 (2018), p. 635 - 645
publié: Sep 1, 2018
publication en ligne: Jun 7, 2018
manuscrit accepté: Nov 14, 2017
révision final du manuscrit reçu: Nov 10, 2017
manuscrit reçu: Aug 23, 2017
Abstract
Complex assemblages of Fe–Mn phosphate minerals occur in several granitic pegmatites in the Mount Wills region of Northeastern Victoria, Australia. The Blue Jacket and Knocker dykes are the most fractionated in the pegmatite field derived from late-stage melts of the Late Silurian Mount Wills Granite. The phosphates include members of the arrojadite, alluaudite and jahnsite–whiteite groups, most commonly forming fine-grained intergrowths that have replaced primary phases such as triplite, wolfeite and presumed triphylite. Electron microprobe analysis has enabled the identification of a range of species, based on new nomenclature schemes for the three main groups of Fe–Mn phosphates present in the pegmatites.
Mots-clefs
arrojadite • alluaudite • jahnsite–whiteite • Fe–Mn phosphates • granite pegmatite • Mount Wills • Victoria