Tim:
That is GREAT NEWS!
I have NOT read your Report in depth but will do so at the lab tomorrow.
Thank YOU, your student and colleagues!
Wondjina Research Institute (WRI) has several iron objects from a suspected
either 16th Century or 19th Century shipwrecks her in California that were
washed up on or buried in beaches that have been soaking for years
in sealed tubs for years at the ranch and NOW that WRI has a first class
Laboratory with UC MERCED students, we will transfer these objects and see
how they have faired AND try out the method if it appears useful..
Do you have any information on objects that have already been
conventionally treated and then treated by your method?
By the way, do you or* any others *on the list have photos of a Hudson's
Bay Ledger book OR its pages. We are trying to track some images down to
go with a story that we are writing about a French Canadian Hudson's Bay
Expedition to the Sierra of California in the 1830's.
Claudia and I are still putting our lives back together after our injuries
in 2010 but are getting better every day and are looking to get back in the
field doing pXRF archaeogeochemical and archaeobiogeochemical studies when
she retires in 2017 from CSUS. I will be 70 and she will be 67, then,
but, hopefully, if our health continues to improve, we, both, will be able
to do or supervise productive pXRF field work for many years.
In the interim, we are slowly getting back laboratory and past field pXRF
projects completed and written up with our very talented UCMERCED students
and, health permitting, will return to SAS and SHA meetings in 2016 and
2017 and hopefully, present on several of WRI's past projects.
Hope to see you and our colleagues at Fort Worth next January.
Sincerely,
Richard J. Lundin BA, MA, RPA, ISAP, AIPG
Mineral Exploration Consultant, Professional Geologist (AIPG) & Permitting
Specialist
Registered Professional Archaeologist (RPA) & Remote Sensing Specialist
(Airbourne & Archaeogeophysics)
Director, Wondjina Research Institute
President & CEO, RICH ORE Mining Inc.
President, Wombat Mining & Exploration Co.
Geologist & Agent, Oro Grande Mining Co.
Partner, WRI\CC JV
Partner, UCMERCED-TCEDA INNOVATIONLAB
On Mon, Jan 25, 2016 at 9:53 AM, Timothy Scarlett <[log in to unmask]> wrote:
> Hi Histarch,
>
> My students, colleagues, and I just completed a small round of experiments
> using supercritical carbon dioxide fluid treatments to extract water
> from—and impregnate polymer into—corroded iron artifacts from
> archaeological sites. This reversible technique for drying and sealing
> nodules or artifacts can become a bulk/batch treatment for corroded iron,
> stabilizing them for storage. The process can cut treatment time from
> months or weeks down to hours per group of samples (orders of magnitude
> faster), while extending time between treatments, and without compromising
> artifact integrity. This can be applied to artifacts which are entirely
> corroded and lack any iron core or those with substantial ferrous metal
> remaining, and following this treatment, more patient and detailed
> conservation plans can be executed when desired.
>
> This is particularly important for industrial and historical archaeology
> sites that produce overwhelming volumes of corroded ferrous metal. Also for
> brownfield and superfund sites, since the technique can be “tuned” to
> extract toxic compounds like arsnic, DDT, and such, without damaging
> artifacts from sites or any period that were exposed to contaminated
> groundwater or processes that contaminated them during their life-history.
>
> As with other studies using subcritical pressures, this may be tweaked to
> quickly and effectively extract chlorides. The studies of this are ongoing
> by a group of conservators and engineers, many of these studies appear it
> he bibliography.
>
> I welcome comments
> Cheers,
> Tim Scarlett
>
>
>
> http://www.mtu.edu/social-sciences/research/reports/Scarlett_Caneba_Final_Report.pdf
> <
> http://www.mtu.edu/social-sciences/research/reports/Scarlett_Caneba_Final_Report.pdf
> >
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