Nature
Large Antarctic Meteorite Found by Expedition Close to Belgium's Station
Staff Reporter
First Posted: Mar 06, 2013 05:29 PM EST
A team of scientists was very successful in their hunt for meteorites in Antarctica and found one of the largest ever, among a total of 425 meteorites. The team, based at Belgium's Princess Elisabeth Antarctica research base, discovered the meteorite weighing 18kg embedded in the East Antarctic ice sheet, the largest such meteorite found in the region since 1988.
The eight members of the SAMBA project, from Universite Libre de Bruxelles (ULB) and Vrije Universiteit Brussel (VUB), Japan's National Institute of Polar Research (NIPR) and Tokyo University undertook a 40 day expedition to search for meteorites scattered across the Nansen Ice Field when on January 28, they found the 18kg ordinary chondrite at an altitude of 2,900m, 140km south of the station. The total weight of the 425 meteorites discovered is 75kg.
"This meteorite was a very unexpected find for us, not only due to its weight, but because we don't normally find such large meteorites in Antarctica", said Vinciane Debaille, a geologist from Universite Libre de Bruxelles, who led the Belgian team during the expedition "This is the biggest meteorite found in East Antarctica for 25 years, so it's a very special discovery for us, only made possible by the existence and location of Princess Elisabeth Antarctica."
Initial field analysis by the scientists suggests that the 18kg meteorite is an ordinary chondrite, the most abundant kind of meteorite. The fusion crust - the meteorite's outer casing - was eroded, allowing the scientists to inspect the rock underneath. The meteorite is currently undergoing a special thawing process in Japan - to ensure water doesn't get inside the rock - but will be brought to Belgium in the future.
"We study meteorites in order to better understand how the solar system formed, how it evolved, how the Earth became such a unique planet in our solar system", said Debaille. "This season's SAMBA mission was a success both in terms of the number and weight of the meteorites we found. Two years ago, we found less than 10kg. This year, we found so much that we had to call the travel agency - because we had 75kg of meteorites to take home".
Princess Elisabeth Antarctica is the world's first zero emission polar research station, and is operated by the International Polar Foundation, in partnership with the Belgian Polar Secretariat. Princess Elisabeth Antarctica's design and construction seamlessly integrates passive building technologies, renewable wind and solar energy, water treatment facilities, continuously monitored power demand and a smart grid for maximising energy efficiency. Located in East Antarctica's Sor Rondane Mountains, Princess Elisabeth Antarctica welcomes scientists from around the world to conduct research in this little-studied and pristine environment.
"Both Princess Elisabeth Antarctica and the International Polar Foundation are proud to support the research work of the Belgian and Japanese meteorite team", said expedition leader Alain Hubert. "By providing solid logistics and field accomodation solutions to scientists working on the ice, we can ensure they can concentrate on what they have come to Antarctica to achieve: unlocking of Nature's mysteries and broadening understanding of our planet".
(Information about science at Princess Elisabeth Antarctica station and life in the frozen south, and a current interactive exhibition, at https://www.insidethestation.be )
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First Posted: Mar 06, 2013 05:29 PM EST
A team of scientists was very successful in their hunt for meteorites in Antarctica and found one of the largest ever, among a total of 425 meteorites. The team, based at Belgium's Princess Elisabeth Antarctica research base, discovered the meteorite weighing 18kg embedded in the East Antarctic ice sheet, the largest such meteorite found in the region since 1988.
"This meteorite was a very unexpected find for us, not only due to its weight, but because we don't normally find such large meteorites in Antarctica", said Vinciane Debaille, a geologist from Universite Libre de Bruxelles, who led the Belgian team during the expedition "This is the biggest meteorite found in East Antarctica for 25 years, so it's a very special discovery for us, only made possible by the existence and location of Princess Elisabeth Antarctica."
Initial field analysis by the scientists suggests that the 18kg meteorite is an ordinary chondrite, the most abundant kind of meteorite. The fusion crust - the meteorite's outer casing - was eroded, allowing the scientists to inspect the rock underneath. The meteorite is currently undergoing a special thawing process in Japan - to ensure water doesn't get inside the rock - but will be brought to Belgium in the future.
"We study meteorites in order to better understand how the solar system formed, how it evolved, how the Earth became such a unique planet in our solar system", said Debaille. "This season's SAMBA mission was a success both in terms of the number and weight of the meteorites we found. Two years ago, we found less than 10kg. This year, we found so much that we had to call the travel agency - because we had 75kg of meteorites to take home".
"Both Princess Elisabeth Antarctica and the International Polar Foundation are proud to support the research work of the Belgian and Japanese meteorite team", said expedition leader Alain Hubert. "By providing solid logistics and field accomodation solutions to scientists working on the ice, we can ensure they can concentrate on what they have come to Antarctica to achieve: unlocking of Nature's mysteries and broadening understanding of our planet".
(Information about science at Princess Elisabeth Antarctica station and life in the frozen south, and a current interactive exhibition, at https://www.insidethestation.be )
See Now: NASA's Juno Spacecraft's Rendezvous With Jupiter's Mammoth Cyclone