Figure 9 in The Tumbarumba Basaltic Gem Field, New South Wales: In Relation to Sapphire-Ruby Deposits of Eastern Australia

Figure 9. (a,b) Comparison between trace element concentrations in theoretical Tumbarumba primary magmas, and calculated curves for non-modal batch partial melting. See text for explanation. Each curve represents a different combination of mantle type and bulk trace element composition. PM = primitive mantle (Sun & McDonough, 1989); MM = metasomatised mantle (sample WGBM 15, O'Reilly & Griffin, 1988). Curve increments are listed in the Key, as well as being shown on the diagrams. The method for calcu lating trace element compositions of "primary" magmas is detailed in the text, with mineral/melt partition coefficients for olivine an d cpx being obtained from: Ablay et al. (1998), Ewart & Chappell (1989), Kostopoulos & James (1992), McKenzie & O'Nions (1991), Nielsen (1998) and Panter et al. (1997). Source of partition coefficients used in the melting calculations are: all olivine, cpx, opx, garnet and spinel from Kostopoulos & James (1992), except for the REE (McKenzie & O'Nions 1991); all amphibole and kaersutite from Ionov et al. (1997), except REE for phlogopite (McKenzie & O'Nions, 1991).