Today's news is that the piece has been identified as aluminium!
Never mind.........it lead to an interesting discussion.
-----Original Message-----
From: mining-history [mailto:[log in to unmask]] On Behalf Of Rob
Ixer
Sent: 19 March 2010 15:33
To: [log in to unmask]
Subject: Re: Silver
There are Pb isotope data for the Pennine ores and also I think for the
Lakes. Ironically, but for the death of my co-author, we were going to use
these
data plus our own to 'prove' that the best described (and ?richest) silver
ores
from the North Pennines were from Eastern Europe!!
That fraud is now well known if still inexplicable. (No fraud by the
mineralogists
describing the ore as they were lied to with respect to the origin of those
ores.) They might have been a little more circumspect.
However, the main Pb isotope data are few with respect to the numbers of
potential ores and the sampling was based on what was available from
unwanted museum material and I certainly would hestite more than once
before using them.
I must return to my original point however good the silver mass Pb isotopic
data would be there is nothing substantail or meaningful to compare to it.
Rob
|