The Biggest Hole in the Solar System
There's a huge splotch on the southern hemisphere of the farside of the Moon. This megasmudge is South Pole-Aitken (SPA) basin, 2500 km in diameter and over 12 km deep. It is darker and richer in iron than the rest of the lunar highlands. Such immense craters formed by impact onto the lunar sur...
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ftciteseerx:oai:CiteSeerX.psu:10.1.1.557.6238 2023-05-15T18:22:00+02:00 The Biggest Hole in the Solar System Written G. Jeffrey Taylor The Pennsylvania State University CiteSeerX Archives 1998 application/pdf http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.557.6238 http://www.psrd.hawaii.edu/July98/PSRD-spa.pdf en eng http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.557.6238 http://www.psrd.hawaii.edu/July98/PSRD-spa.pdf Metadata may be used without restrictions as long as the oai identifier remains attached to it. http://www.psrd.hawaii.edu/July98/PSRD-spa.pdf text 1998 ftciteseerx 2016-01-08T11:51:14Z There's a huge splotch on the southern hemisphere of the farside of the Moon. This megasmudge is South Pole-Aitken (SPA) basin, 2500 km in diameter and over 12 km deep. It is darker and richer in iron than the rest of the lunar highlands. Such immense craters formed by impact onto the lunar surface. Calculations indicate that the floor of SPA basin ought to be composed mostly of rock derived from the mantle of the Moon, but using spacecraft data Paul Lucey (University of Hawaii) and his co-workers suggest it is at most half mantle, half crust. Taking a different approach, Carle Pieters (Brown University) and her colleagues suggest that no mantle is present. Why is so little mantle present? Is our understanding of the formation of craters incomplete? Was there something unusual about the impact, such as the projectile striking the Moon at a low angle? What's going on? References: Pieters, Carle M. and others (1997) Mineralogy of the mafic anomaly in the South Pole-Aitken Basin: Implications for excavation of the lunar mantle. Geophysical Research Letters vol. 24, p. 1903-1906. Text South pole Unknown Aitken ENVELOPE(-44.516,-44.516,-60.733,-60.733) South Pole |
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ftciteseerx |
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English |
description |
There's a huge splotch on the southern hemisphere of the farside of the Moon. This megasmudge is South Pole-Aitken (SPA) basin, 2500 km in diameter and over 12 km deep. It is darker and richer in iron than the rest of the lunar highlands. Such immense craters formed by impact onto the lunar surface. Calculations indicate that the floor of SPA basin ought to be composed mostly of rock derived from the mantle of the Moon, but using spacecraft data Paul Lucey (University of Hawaii) and his co-workers suggest it is at most half mantle, half crust. Taking a different approach, Carle Pieters (Brown University) and her colleagues suggest that no mantle is present. Why is so little mantle present? Is our understanding of the formation of craters incomplete? Was there something unusual about the impact, such as the projectile striking the Moon at a low angle? What's going on? References: Pieters, Carle M. and others (1997) Mineralogy of the mafic anomaly in the South Pole-Aitken Basin: Implications for excavation of the lunar mantle. Geophysical Research Letters vol. 24, p. 1903-1906. |
author2 |
The Pennsylvania State University CiteSeerX Archives |
format |
Text |
author |
Written G. Jeffrey Taylor |
spellingShingle |
Written G. Jeffrey Taylor The Biggest Hole in the Solar System |
author_facet |
Written G. Jeffrey Taylor |
author_sort |
Written G. Jeffrey Taylor |
title |
The Biggest Hole in the Solar System |
title_short |
The Biggest Hole in the Solar System |
title_full |
The Biggest Hole in the Solar System |
title_fullStr |
The Biggest Hole in the Solar System |
title_full_unstemmed |
The Biggest Hole in the Solar System |
title_sort |
biggest hole in the solar system |
publishDate |
1998 |
url |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.557.6238 http://www.psrd.hawaii.edu/July98/PSRD-spa.pdf |
long_lat |
ENVELOPE(-44.516,-44.516,-60.733,-60.733) |
geographic |
Aitken South Pole |
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Aitken South Pole |
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South pole |
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South pole |
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http://www.psrd.hawaii.edu/July98/PSRD-spa.pdf |
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http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.557.6238 http://www.psrd.hawaii.edu/July98/PSRD-spa.pdf |
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Metadata may be used without restrictions as long as the oai identifier remains attached to it. |
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