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{\title Supplementary publication to:}{\author Alan S Collins}{\operator Administrator}{\creatim\yr2004\mo8\dy9\hr11\min20}{\revtim\yr2004\mo8\dy9\hr11\min20}{\printim\yr2004\mo3\dy19\hr9\min48}{\version2}{\edmins1}{\nofpages2}{\nofwords1083}
{\nofchars6176}{\*\company University of Western Australia}{\nofcharsws7584}{\vern8247}}\paperw11906\paperh16838 \widowctrl\ftnbj\aenddoc\noxlattoyen\expshrtn\noultrlspc\dntblnsbdb\nospaceforul\formshade\horzdoc\dgmargin\dghspace180\dgvspace180
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{\pntxta .}}{\*\pnseclvl4\pnlcltr\pnstart1\pnindent720\pnhang{\pntxta )}}{\*\pnseclvl5\pndec\pnstart1\pnindent720\pnhang{\pntxtb (}{\pntxta )}}{\*\pnseclvl6\pnlcltr\pnstart1\pnindent720\pnhang{\pntxtb (}{\pntxta )}}{\*\pnseclvl7
\pnlcrm\pnstart1\pnindent720\pnhang{\pntxtb (}{\pntxta )}}{\*\pnseclvl8\pnlcltr\pnstart1\pnindent720\pnhang{\pntxtb (}{\pntxta )}}{\*\pnseclvl9\pnlcrm\pnstart1\pnindent720\pnhang{\pntxtb (}{\pntxta )}}\pard\plain \s4\ql \li0\ri0\sb120\sl360\slmult1
\keepn\widctlpar\aspalpha\aspnum\faauto\outlinelevel3\adjustright\rin0\lin0\itap0 \b\f1\fs24\lang3081\langfe1033\cgrid\langnp3081\langfenp1033 {\b0 Supplementary publication to:
\par }\pard\plain \ql \li0\ri0\sb120\widctlpar\aspalpha\aspnum\faauto\adjustright\rin0\lin0\itap0 \fs24\lang3081\langfe1033\cgrid\langnp3081\langfenp1033 {\f1 Provenance and Age Constraints of the South Stack Group, Anglesey, UK: U-Pb SIMS Detrital Zircon Data
\par Collins, A.S and Buchan, C.
\par }\pard \ql \li0\ri0\widctlpar\aspalpha\aspnum\faauto\adjustright\rin0\lin0\itap0 {\b\f1
\par }\pard\plain \s4\ql \li0\ri0\sb120\sl360\slmult1\keepn\widctlpar\aspalpha\aspnum\faauto\outlinelevel3\adjustright\rin0\lin0\itap0 \b\f1\fs24\lang3081\langfe1033\cgrid\langnp3081\langfenp1033 {Analytical Techniques
\par }\pard\plain \s15\qj \li0\ri0\sb120\sl360\slmult1\widctlpar\aspalpha\aspnum\faauto\adjustright\rin0\lin0\itap0 \fs24\lang1033\langfe1033\loch\af0\hich\af0\dbch\af18\cgrid\langnp1033\langfenp1033 {\lang2057\langfe1033\langnp2057
\hich\af0\dbch\af18\loch\f0 Zircons were separated from crushed rock samples by conventional magnetic\hich\af0\dbch\af18\loch\f0
and methylene iodide liquid separation. Grains were handpicked and mounted in epoxy resin discs that were coated with a thin membrane of gold that produced a resistively of 10-20 ohms across the disc. The mounts were then imaged using a CL detector fitte
\hich\af0\dbch\af18\loch\f0 d\hich\af0\dbch\af18\loch\f0
to a Phillips XL30 scanning electron microscope at a working distance of 15 mm and using an accelerating voltage of 10 Kv. The resulting images (Fig. 2) highlight distortions in the crystal lattice }{\field\fldedit{\*\fldinst {
\lang2057\langfe1033\langnp2057 \hich\af0\dbch\af18\loch\f0 ADDIN EN.CITE Stevens Kalceff200083027Stevens Kalceff, M APhillips, M RMoon, A RKalceff, W2000Cathodolu
\hich\af0\dbch\af18\loch\f0 m\hich\af0\dbch\af18\loch\f0
inescence microcharacterisation of silicon dioxide polymorphsPagel, MBarbin, VBlanc, POhnenstetter,
\hich\af0\dbch\af18\loch\f0 \hich\af0\dbch\af18\loch\f0
DCathodoluminescence in GeosciencesBerlinSpringer-Verlag193-224}}{\fldrslt {
\lang2057\langfe1033\langnp2057 \hich\af0\dbch\af18\loch\f0 (Stevens Kalceff }{\i\lang2057\langfe1033\langnp2057 \hich\af0\dbch\af18\loch\f0 et al\hich\af0\dbch\af18\loch\f0 .}{\lang2057\langfe1033\langnp2057 \hich\af0\dbch\af18\loch\f0 2000)}}}{
\lang2057\langfe1033\langnp2057 \hich\af0\dbch\af18\loch\f0 that are related to trace-element distribution and/or radiation damage }{\field\fldedit{\*\fldinst {\lang2057\langfe1033\langnp2057 \hich\af0\dbch\af18\loch\f0
ADDIN EN.CITE Rubatto20008301e.g. 7Rubat\hich\af0\dbch\af18\loch\f0
to, DGebauer, D.2000Use of cathodoluminescence for U-Pb zircon dating by ion microprobe: some examples from the western AlpsPagel, MBarbin, VBlanc, POhnenstetter, DCathodoluminescence in GeosciencesBerlinSpringer-Verlag373-400Nasdala200387007Nasdala, L.Zhang, M.\hich\af0\dbch\af18\loch\f0
Kempe, U.Panczer, M.Gaft, M.Andrut, M.Plötze, M.2003Spectroscopic methods applied to zircon\hich\af0\dbch\af18\loch\f0
Hanchar, J.M.Hoskin, P.W.O.ZirconWashington, D.C.Mineralogical Society of America, Reviews in Mine
\hich\af0\dbch\af18\loch\f0 r\hich\af0\dbch\af18\loch\f0 alogy & Geochemistry, Volume 53427-467}}{\fldrslt {\lang2057\langfe1033\langnp2057 \hich\af0\dbch\af18\loch\f0
(e.g. Rubatto & Gebauer 2000; Nasdala }{\i\lang2057\langfe1033\langnp2057 \hich\af0\dbch\af18\loch\f0 et al.}{\lang2057\langfe1033\langnp2057 \hich\af0\dbch\af18\loch\f0 2003)}}}{\lang2057\langfe1033\langnp2057 \hich\af0\dbch\af18\loch\f0 .
\par }\pard\plain \qj \li0\ri0\sb120\sl360\slmult1\widctlpar\aspalpha\aspnum\faauto\adjustright\rin0\lin0\itap0 \fs24\lang3081\langfe1033\cgrid\langnp3081\langfenp1033 {
Zircon U-Th-Pb isotopic data was collected using the Sensitive High Resolution Ion Microprobe Mass Spectromete
r (SHRIMP II) based in the John de Laeter Centre of Mass Spectrometry, Perth, Western Australia. The sensitivity for Pb isotopes in zircon using SHRIMP II was ~18 cps/ppm/nA, the primary beam current was 2.5-3.0 nA and mass resolution was ~5000. Correctio
n of measured isotopic ratios for common Pb was based on the measured }{\super 204}{Pb in each sample and often represented a <1% correction to the }{\super 206}{Pb counts (see %common }{\super 206}{
Pb in Table 1). Any common Pb component in the standard was interpreted as surface contamin
ant and modelled on the composition of Broken Hill ore Pb, additional common Pb in the unknowns was modelled on the approximate age of the grain using the Pb isotope evolution model of Stacey and Kramers (1975).
\par Pb/U isotopic ratios were corrected for instrumental inter-element discrimination using the observed covariation between Pb}{\super +}{/U}{\super +}{ and UO}{\super +}{/U}{\super +}{ }{\field\fldedit{\*\fldinst {
ADDIN EN.CITE Compston1984682301984U-Pb
geochronology of zircons from lunar breccia 73217 using a sensitive high mass-resolution ion microprobeJournal of Geophysical Research89SupplementB525-B534Compston, W.Williams, I.S.Meyer, C.Hinthorne197983970Hinthorne, J.R.Anderson, C.A.Conrad, R.L.Lovering, J.F.1979Single-grain 207Pb/206Pb and U/Pb age determinations with a 10 µm spatial resolution using the ion microprobe mass analys
er (IMMA)Chemical Geology25271-303}}{\fldrslt {(Hinthorne }{\i et al.}{ 1979; Compston }{\i et al.}{ 1984)}}}{
determined from interspersed analyses of the Perth standard zircon CZ3. CZ3 is a single zircon megacryst from Sri Lanka with an age of 564 Ma and a }{\super 206}{Pb/}{\super 238}{U=0.0914 }{\field\fldedit{\*\fldinst {
ADDIN EN.CITE Nelson19971471D R Nelson<
/AUTHORS>1997Compilation of SHRIMP U-Pb zircon geochronology data, 1996Geological Survey of Western Australia, Record 1997/2189}}{\fldrslt {(Nelson 1997)}
}}{.
\par
\par }\pard\plain \s4\ql \li0\ri0\sb120\sl360\slmult1\keepn\widctlpar\aspalpha\aspnum\faauto\outlinelevel3\adjustright\rin0\lin0\itap0 \b\f1\fs24\lang3081\langfe1033\cgrid\langnp3081\langfenp1033 {References
\par }\pard\plain \ql \fi-720\li720\ri0\widctlpar\aspalpha\aspnum\faauto\adjustright\rin0\lin720\itap0 \fs24\lang3081\langfe1033\cgrid\langnp3081\langfenp1033 {\field\fldedit{\*\fldinst { ADDIN EN.REFLIST }}{\fldrslt {\scaps
Compston, W., Williams, I.S. & Meyer, C.}{ 1984. U-Pb geochronology of zircons from lunar breccia 73217 using a sensitive high mass-resolution ion microprobe. }{\i Journal of Geophysical Research}{, }{\b 89}{(Supplement), B525-B534.
\par }{\scaps Hinthorne, J.R., Anderson, C.A., Conrad, R.L. & Lovering, }{J.F. 1979. Single-grain 207Pb/206Pb and U/Pb age determinations with a 10 \'b5m spatial resolution using the ion microprobe mass analyser (IMMA). }{\i Chemical Geology}{, }{\b 25}{
, 271-303.
\par }{\scaps Nasdala, L. Zhang, M., Kempe, U., Panczer, M., Gaft, M., Andrut, M. & Pl\'f6tze, M}{. 2003. Spectroscopic methods applied to zircon. }{\i In}{: }{\scaps J.M. Hanchar and P.W.O. Hoskin}{ (eds), }{\i Zircon}{
. Mineralogical Society of America, Reviews in Mineralogy & Geochemistry, Volume 53, Washington, D.C., 427-467.
\par }{\scaps Nelson}{, D.R. 1997. }{\i Compilation of SHRIMP U-Pb zircon geochronology data, 1996}{. Geological Survey of Western Australia, Record 1997/2, 189 pp.
\par }{\scaps Rubatto, D. & Gebauer, D. 2000}{. Use of cathodoluminescence for U-Pb zircon dating by ion microprobe: some examples from the western Alps. }{\i In}{: M. }{\scaps Pagel, V. Barbin, P. Blanc and D. Ohnenstetter}{ (eds), }{\i
Cathodoluminescence in Geosciences.}{ Springer-Verlag, Berlin, 373-400.
\par }{\scaps Stacey, F.S. & Kramers, J.D}{. 1975. Approximation of terrestrial lead isotope evolution by two-stage model. }{\i Earth and Planetary Science Letters}{, }{\b 26}{, 207-221.
\par }{\scaps Stevens Kalceff, M.A., Phillips, M.R., Moon, A.R. & Kalceff, W.}{ 2000. Cathodoluminescence microcharacterisation of silicon dioxide polymorphs. In: }{\scaps M. Pagel, V. Barbin, P. Blanc and D. Ohnenstetter}{ (eds), }{\i Cathodoluminescence}{ }{
\i in}{ }{\i Geosciences}{. Springer-Verlag, Berlin, 193-224.
\par }}}\pard\plain \ql \fi-720\li720\ri0\widctlpar\aspalpha\aspnum\faauto\adjustright\rin0\lin720\itap0 \fs24\lang3081\langfe1033\cgrid\langnp3081\langfenp1033 {
\par }}