Lieber Peter, wie gehts dir ?
Carl
At 13:38 05.04.00 +1200, you wrote:
>Hi all,
>
>first I wonder why Ilya Bindeman is interested only in work 'after 1993'?
Yes,
>sometimes the most recent work is the best, but in the scramble for
funding and
>attention, important points of view are sometimes overlooked, even if well
known
>in the past. Like Mike Palin, I will point to a "under-cited paper" that,
apart
>from its data, also might illuminate the relationship between theory and
>experiment. Try "New evidence on magnetite oxygen isotope geothermometers
at 175
>and 112 deg C in Wairakei steam pipelines (New Zealand)" by Blattner,
>Braithwaite and Glover, Isotope Geoscience 1 (1983) 195-204 (Ten years too
>old!?). Main point: the quartz-magnetite function may be far from a straight
>line. I do not think the pure theorists have tackled this one. Better to
stick
>to a "proven" formula?
>
>Experiment decides: but which experiment? The "empirical" approach using
natural
>occurrences is one of the most promising, even if it seems to lack the
glamour
>of theory. See also (wrt quartz-calcite) Sharp and Kirshner GCA 58 4491-4501
>(1994), and Blattner AJS 275 785-800 (1975) - that was before the age of
chaos,
>of course.
>
>We can only perceive natural isotopes through the gate of analysis. If
there is
>systematic analytic bias between, say, silicates and water, no theory can
help.
>So mineral pairs are better in this way. That still leaves the problem of
>closure temperatures.
>
>
>Cheers!
>
>Peter Blattner
>c/GNS
>PO Box 30368
>Lower Hutt/ New Zealand
>
>
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Dr. Carl Brenninkmeijer e-mail: [log in to unmask]
Max Planck Institute for Chemistry phone : +49-6131-305-453
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-> home-page of the Brenninkmeijer group
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