Probing insights

A UNIVERSITY of B.C.
research team that makes
minerals at ineredibly high
pressures and temperatures
will soon be analysing them
in a new electron
microprobe, to be purchased
with a $643,000 grant from
Canada’s Natural Sciences
and Engineering Research
Council.

Prof. Hugh Greenwood
said the high pressure work,
carried out in apparatus sim-
ilar to that used to make
commercial diamonds, com-
bined with the analytical ca-
pabilities of the new
microprobe, will keep UBC
in the forefront of research
in such diverse fields as
geology, ore deposits, metal-
lurgy and radioactive waste
disposal.

The minerals which Prof.
Greenwood and his col-
leagues make in his Labora-
tory for Phase Equilibrium
in the Geological Sciences
Building are created in
equipment capable of
pressures of up to 525,000
pounds per square inch
(about 10,000 times the
pressure in a houschold
water line) and temperatures
up to 1,600 degrees Celcius.

The electron microprobe is

Although the emphasis in
the geological sciences ktbo-
Tater, is on solving tun
damemal problems relied
to the origin of rock-forming
minerals. ibe results can be
used to understand a wide
variety af practical pro-
blems.

“On the one hand,” said
Prot. Greenwood ,
“understanding. the origin of
mountain range. requires
detailed knowledee of the
minerals in the rocks and, on
the other, the search for ores
can be aided by a detailed
understanding of the altera-
tions that have taken place
in the rock formations sur-
rounding many ore
deposits."

One of the leading pro-
posals “or disposing of nu-
clear wastes is to seai them
up in chambers at the bot-
tom of a mile-deep mine
shaft in the Canadian Shield,
a belt of rock 2.6 to 3
billion years old that girdles
Hudson's Bay.

The Canadian nuclear
waste disposal program,
which Prof. Greenwoodz
says is one of the most
sophisticated in the world,
currently emphasizes an
evaluation of the hazards of

essential to the research Qgiafggground disposal.

because it can analyse the
tiny artificial mineral! grains
produced in the laboratory,
some of which are as smal!
as one micron — one-
millionth of a metre or
-000004 inches — across.

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41 - Sunday, June 2, 1985 - North Shore News

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