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From: Stig_Agermose@online.pol.dk
Date: Fri, 10 Jul 1998 04:14:01 +0200
Fwd Date: Fri, 10 Jul 1998 07:35:39 -0400
Subject: Impact Zone Of Greenland Meteorite Confirmed


>From DR Online (Radio Denmark Online) via CNN, July 8. URL:

http://cnn.com/TECH/space/9807/08/metorite.dust/index.html

Stig


*******


Impact zone of giant meteorite confirmed
            

(DR Online) -- Following microscopic analysis of snow-samples
taken last week, the impact zone of the giant meteorite that hit
southern Greenland last December has been located.

Last week, astronomer Holger Pedersen and geophysicist Torben
Risbo of the University of Copenhagen conducted a preliminary
field investigation on the southwestern Greenland ice cap.

Collecting snow samples by helicopter, they hoped to find traces
of meteorite dust left in the snow covering the glaciers. Some
40 samples were taken along 3 different lines giving a very
preliminary profile of the snow-masses covering the glacier,
where they scientists hope to find the meteorite -- If it did
not evaporate during entry into the.

The samples were taken to the Laboratory of the Arctic Station
at Qeqertarsuaq, Greenland, for microscopic analysis by Risbo
and revealed definite signs of meteoritic substance.
Sub-millimeter size particles that look like round brown glass,
with little tails of glass trailing behind them, were found.
Other particles seem to give clues as to the crystal-structure
of the meteorite, but this can't be confirmed until analysis has
been conducted with an electron microscope.

A major field expedition on foot and by helicopter into the
impact zone planned for the end of this month may have to be
pushed forward. It now seems important to collect a much bigger
amount of snow samples in order to narrow down the area to be
investigated. Also it can't be ruled out that the meteorite, big
as it was, completely evaporated
during entry, and therefore the only traces will be just dust.


Related stories:

*Siberia believed to be site of largest meteor impact on Earth -
July 3, 1998

*Tomorrow/Today: Listening for asteroids - July 2, 1998


Related sites:

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*DR Online


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