Trace element zonation in marbles hosting Cu-Zn-Fe-Pb-As sulphides at Gruvåsen, south central Sweden

Tourmaline in the central Swedish ore district

“…As is illustrated in Fig. Since Zr is generally regarded as a rather immobile element, with clear exceptions (Hellingwerf 1992), its mobility here may be attributed to the presence of boron, possibly as metal-borate complexes. This behaviour might be explained by progressive uptake of Mg in tourmaline during prograde metamorphic conditions.…”