Asymmetric Distribution of Lunar Impact Basins Caused by Variations in Target Properties

被引：122

作者：

Miljkovic, Katarina ^{[1
]}

Wieczorek, Mark A. ^{[1
]}

Collins, Gareth S. ^{[2
]}

Laneuville, Matthieu ^{[1
]}

Neumann, Gregory A. ^{[3
]}

Melosh, H. Jay ^{[4
]}

Solomon, Sean C. ^{[5
,6
]}

Phillips, Roger J. ^{[7
]}

Smith, David E. ^{[8
]}

Zuber, Maria T. ^{[8
]}

机构：

[1] Univ Paris Diderot, Inst Phys Globe Paris, Sorbonne Paris Cite, F-75205 Paris 13, France

[2] Univ London Imperial Coll Sci Technol & Med, Dept Earth Sci & Engn, London SW7 2AZ, England

[3] NASA, Goddard Space Flight Ctr, Solar Syst Explorat Div, Greenbelt, MD 20771 USA

[4] Purdue Univ, Dept Earth Atmospher & Planetary Sci, W Lafayette, IN 47907 USA

[5] Carnegie Inst Sci, Dept Terr Magnetism, Washington, DC 20015 USA

[6] Columbia Univ, Lamont Doherty Earth Observ, Palisades, NY 10964 USA

[7] SW Res Inst, Planetary Sci Directorate, Boulder, CO 80302 USA

[8] MIT, Dept Earth Atmospher & Planetary Sci, Cambridge, MA 02139 USA

来源：

SCIENCE | 2013年 / 342卷 / 6159期

关键词：

MOON; ORIGIN; CRUST; DEFORMATION; BOMBARDMENT; EVOLUTION; SURFACE;

D O I：

10.1126/science.1243224

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

Maps of crustal thickness derived from NASA's Gravity Recovery and Interior Laboratory (GRAIL) mission revealed more large impact basins on the nearside hemisphere of the Moon than on its farside. The enrichment in heat-producing elements and prolonged volcanic activity on the lunar nearside hemisphere indicate that the temperature of the nearside crust and upper mantle was hotter than that of the farside at the time of basin formation. Using the iSALE-2D hydrocode to model impact basin formation, we found that impacts on the hotter nearside would have formed basins with up to twice the diameter of similar impacts on the cooler farside hemisphere. The size distribution of lunar impact basins is thus not representative of the earliest inner solar system impact bombardment.

引用

页码：724 / 726

页数：3

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