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Ralph
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Simon Booth
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> -----Original Message-----
> From: Ralph Bottrill [SMTP:[log in to unmask]]
> Sent: Friday, November 12, 1999 12:15 PM
> To: [log in to unmask]
> Subject: Help please: low-T quartz
>
> We have been working in an area of dolomite karst in Tasmania, and have
> found areas of extensive silicification. This includes zones of vuggy
> quartz
> with crystals to several cm. Sulphide and gold mineralisation occurs
> where
> this has been overprinted by alteration from igneous intrusions.
>
> The question is, can such mega-quartz form from low-T groundwaters? Fluid
> inclusion work suggests T< 50 oC, but I am not aware of such coarse
> grained
> low-T quartz elsewhere.
>
> Regards
>
> Ralph Bottrill
> [log in to unmask] <mailto:[log in to unmask]>
>
> _--_|\
> Dept of Mines - Tasmania / \ P.O. Box 56, Rosny Park
> Tasmanian Geological Survey \_.--._/ Tasmania 7018, Australia
> Aus Tel: 03-6233-8359 v Intl Tel: +61-3-6233-8359
> Aus Fax: 03-6233-8338 Here!.../ Intl Fax: +61-3-6233-8338
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