In the O6etztal-Stubai complex, Austria, within 
polymetamorphic metacarbonates, zirconolite and baddeleyite 
occur in several mineral assemblages consisting of chlorite, 
ilmenite, apatite, spinel, phlogopite, titanian clinohumite, 
olivine, calcite, dolomite and diopside (Purtscheller & Tessadri, 
1985). Analyses M23—M27 (Table 3) are the 
wavelength-dispersive microprobe analyses given by 
Purtscheller & Tessadri (1985). 
In the Adamello contact aureole, Italy, 
compositionally-zoned and corroded zirconolite occurs in two 
zones within a Ti-rich vein in dolomite marbles at the contact 
with a tonalite intrusion (Gieré, 1990a). In the phlogopite zone, 
zirconolite is always found associated with phlogopite and 
calcite (tdolomite), and occasionally with geikelite, rutile and 
fluorapatite. In the titanian clinohumite zone, zirconolite occurs 
with titanian clinohumite, spinel, calcite, dolomite, pyrrhotite, 
geikelite, fluorapatite and minor secondary chlorite. A detailed 
mineralogical and chemical description is given in Gieré & 
Williams (1992), and analyses M28-M66 (Table 3) are 
wavelength-dispersive microprobe analyses from Gieré (1990b). 
At Koberg Mine, Bergslagen, Sweden, yttrian zirconolite 
occurs as anhedral grains, predominantly 20-30pm in diameter, 
in an altered phlogopite-rich sample associated with a marble 
skarn (Zakrzewski et al., 1992). The low analytical totals 
(analyses M67-M94, Table 3) suggest the zirconolite is hydrated 
(Zakrzewski et al., 1992). 
At the agpaitic alkaline syenite complex of Lovozero, Kola, 
zirconolite (reported as ‘zirkelite’) has been described in a 
mineral assemblage including rosenbuschite, from the contact 
metasomatic rocks of the massif (Semenov ef al., 1963). 
Analyses M95-M96 (Table 3) are the wet chemical data of 
Semenov et al. (1963). 
In a dolomitic marble from the Neichi mine, Iwate Prefecture, 
Japan zirconolite is associated with geikelite and baddeleyite, 
forsterite and spinel (Kato & Matsubara, 1991). The 
composition of zirconolite is close to the theoretical 
composition (analyses M97-M98, Table 3, from Kato & 
Matsubara (1991). 
At Ser Rondane, Antarctica, Grew et al. (1989) report 
zirconolite (qualitative analysis only, cf. p. 119) from a marble 
affected by metasomatic processes which had introduced rare 
metals. Associated minerals include dissakisite-(Ce) (Grew et al., 
1991), calcite, dolomite, phlogopite, chlorite, ilmenite-geikelite 
and spinel. 
Rekharskiy & Rekharskaya (1969) discovered zirconolite 
(reported as zirkelite) intergrown with jordisite and abundant 
metasomatic pyrite, as veins in zones of altered trachytic to 
rhyolitic volcanic rocks. Locality details are not reported. 
Kinny & Dawson (1992) report the occurrence of zirconolite, 
as a rare accessory phase associated with zircon and baddeleyite, 
in a veined and metasomatised harzburgite xenolith from 
Kimberley, southern Africa. The metasomatism is 
MARID-related (Kinny & Dawson, 1992) and considered to be 
associated with kimberlite magma. Analysis M99, Table 3, is the 
unpublished mean of 6 microprobe analyses (Prof. J.B. Dawson, 
pers. comm., 1993). 
Rubin et al. (1993) report zirconolite occurring as inclusions 
in phlogopite in one sample of a complex skarn from the 
Ertsberg District of Irian Jaya, Indonesia. No analytical details 
are given. 
Placer Deposit. Zirconolite is reported as millimetre-sized 
crystals from two placer deposits. 
At Jacupiranga, Sao Paulo, Brazil, zirconolite (named as the 
C.T. WILLIAMS AND R GIERE 
new mineral ‘zirkelite’), is found with baddeleyite and perovskite 
in the heavy mineral fraction from pyroxene sands of “. . . the 
decomposed magnetite-pyroxenite of Jacupiranga . . .’ (Hussak, 
1895; Hussak & Prior, 1895; see also Pudovkina et al., 1974). 
Analyses Pl, P2 are unpublished wavelength-dispersive 
microprobe analyses (CTW) of separate grains (80142). The wet 
chemical analysis given in Hussak & Prior (1895) is not included 
here, as the chemical separation techniques employed in the 
analysis could only provide qualitative data for ZrO, and TiO,. 
In Sri Lanka, zirconolite (reported as ‘zirkelite’) was observed 
from two ‘gem gravel’ localities in the Sabaragamuwa Province: 
at Walaweduwa in the Bambarabotuwa district, and in southern 
Sabaragamuwa (Blake & Smith, 1913). Analyses P3, P4 (Table 3) 
are from Bambarabotuwa, and P5-P7 from Sabaragamuwa; 
analyses P8, P9 are microprobe data from Lumpkin et al. (1986); 
analysis P10 is an unpublished (CTW) wavelength-dispersive 
microprobe analysis of several grains (BM1905,361). 
‘Other’ Rock Types. Sapphirine Granulite: Zirconolite occurs as 
acicular grains in a mineral assemblage including sapphirine, 
spinel, enstatite and minor phlogopite from a sapphirine 
granulite nodule sampled from a xenolith-rich norite wall zone 
in the Archaean Vestfold Hills, east Antarctica (Harley, 1994). 
The zirconolite is considered to have been a relatively early 
crystallising phase during the melt crystallisation history of the 
entrapped granulite xenolith. Analyses SG1-SG3 (Table 3) are 
from Harley (1994). 
Alnoite: Thin (1 um) rims of zirconolite (no compositional 
details given) are reported as overgrowing a baddeleyite crystal 
from the ile Bizard alnodite, Québec, Canada (Heaman & Le 
Cheminant, 1993). Although the baddeleyite crystals are 
considered to be mantle-derived xenocrysts, the associated 
overgrowths, which include perovskite and melilite as well as 
zirconolite, are considered to have formed after exposure to the 
alnoite magma. 
Lunar. Zirconolite has been observed in several lunar samples, 
(cf. review by Frondel, 1975). Data from the literature are 
presented as analyses LI-L13 (Table 3). It occurs in 
coarse-grained basalts (Apollo 11, 15 and 17), in a feldspathic 
Table 1 Range of chemical variation in natural zirconolite 
Terrestrial* Lunar 
Maximum Minimum Maximum Minimum _ Theoretical 
composition 
CaO 16.54 01.83 10.70 02.63 16.5 
REE,O, 23.66 0.00 31.98 04.74 
PbO 00.80 00.00 02.19 00.00 
TOs 2228 00.00 02.34 00.00 
UO, 23.98 00.00 01.16 00.00 
ZrO, 44.18 DR? 45/40 29.80 36.3 
HO, O13 00.00 01.34 00.00 
TiO, 44.91 13.56 34.60 25.48 47.2 
MgO _— 03.04 00.00 01.15 00.00 
ALO, 03.47 00.00 01.60 00.35 
FeO 10.20 00.00 11.40 04.23 
Fe,0, 09.58 01.08 x és 
Nb,O;, 27.00 00.19 04.34 00.00 
Ta,O, 05.83 00.00 00.40 00.00 
wo, 01.44 00.00 z = 
*Excluding kimberlite analyses K1 and K2 (see text) 
