as I was saying, 1000C- can see for some bulk compositions that these steps
miss important increases in melt % e.g. for NBS there is still lots of Bt at
900C (plus some opx), whereas at 1000C all bt has gone. anyway, things look
good. esme will probably take a while t get your data sorted out as she
generated lots of images and data. All in all her visit to adelaide was
very productive, and in the end analyses were done using WDS on a Cameca
eprobe without using a cryo stage - this was all passed through Gary and he
seemed happy with it. The e-probe staff suggested that it would give a
better result than the SEM with EDS.
Esme has a copy of the analytical set-up, and i'm going to see if I can get
analyses done on our Cameca in meloburne, BSe imaging permitted- this would
allow me to do the analyses gradually over a couple of months...
anyway, bye for now.
cheers,
Ian
p.s. did you get the bulk composition for nB5 from gary? If so, could you
please send it to me?
_____________________________________________________________________
Dr Ian Buick
Metamorphism, Crustal Fluid Flow and Geochronology
Dept. of Earth Sciences
La Trobe University
Bundoora, Victoria 3086
AUSTRALIA
Phone: National: (03) 9479 2647
International: ### 61-3-9479 2647
Fax: National: (03) 9479 1272
International: ### 61-3-9479 1272
E-Mail: [log in to unmask]
[log in to unmask]
(note change of home email address)
_____________________________________________________________________
> From: "Gibson, Roger, Dr" <[log in to unmask]>
> Organization: University of the Witwatersrand
> Reply-To: No title defined <[log in to unmask]>
> Date: Fri, 12 Oct 2001 08:04:57 +0100
> To: [log in to unmask]
> Subject: PhD Opportunity
>
> PhD (Doktoranden) Research Opportunity for a Petrographer/Geochemist
>
> in the
>
> Impact Cratering Research Group, University of the Witwatersrand,
> Johannesburg
>
> Beginning at the end of October/early November 2001, the International
> Continental Scientific Drilling Programme (ICDP) will drill a deep borehole
> into the Cretaceous/Tertiary boundary Chicxulub impact structure
> located at the edge of the Yucatan peninsula in Mexico. The Impact
> Cratering Research Group at Wits University has a long and successful
> history of geological, mineralogical, and geochemical investigations of
> impact structures in nearly all parts of the world. We have obtained a
> comprehensive research grant (covering reseqarch and living expenses)
> from the American Chemical Society for a 3-year PhD project aimed at
> making a major contribution to the petrographic-chemical analysis of the
> various impact breccia components and their constituents in this
> Chicxulub drillcore. The aim is to contribute to a better understanding of
> the impact cratering process, through analysis of derivation and mixing
> of target rock components. The drill core will be investigated by an
> international consortium, in which many of the foremost researchers in
> planetology and earth sciences will interact. The project will begin as
> soon as core samples become available, likely around February/March
> 2002.
>
> The successful candidate for this project should have a sound
> mineralogical-geochemical background. Shock petrographic expertise is
> not a prerequisite – training on the job can be provided.
>
> The Impact Cratering Research Group comprises 7 researchers from a
> number of research and teaching departments at Wits University. All
> geological disciplines are covered. The School of Geoscience at Wits
> encompasses the Departments of Geology, Geophysics, and
> Palaeontology, as well as a number of research entities. State-of-the-art
> analytical equipment includes XRF/XRD, scanning electron microscopy,
> a radiogenic isotope laboratory, a laser-Raman spectrometry, fluid
> inclusion and cathodoluminescence laboratories. Other facilities are
> available in Johannesburg, or through close collaborative links
> universities abroad.
>
> For further information about geology at Wits, refer to our departmental
> website www.wits.ac.za/geology. Regarding this PhD project, contact
> Prof. Wolf Uwe Reimold, Head, Impact Cratering Research Group,
> Department of Geology, University of the Witwatersrand, Private Bag 3,
> P.O. Wits 2050, Johannesburg, South Africa; Tel. +27 11 717 6565; Fax
> +27 11 339 1697; E-mail [log in to unmask]
>
>
>
> Prof. Roger Gibson
> Department of Geology
> University of the Witwatersrand
> Private Bag 3
> P O WITS
> Johannesburg 2050
> REPUBLIC OF SOUTH AFRICA
>
> Tel. + 11 717 6553 (Sec. + 11 717 6547)
> Fax + 11 339 1697
>
