GRAIL gravity constraints on the vertical and lateral density structure of the lunar crust

被引：130

作者：

Besserer, Jonathan ^{[1
]}

Nimmo, Francis ^{[1
]}

Wieczorek, Mark A. ^{[2
]}

Weber, Renee C. ^{[3
]}

Kiefer, Walter S. ^{[4
]}

McGovern, Patrick J. ^{[4
]}

Andrews-Hanna, Jeffrey C. ^{[5
,6
]}

Smith, David E. ^{[7
]}

Zuber, Maria T. ^{[7
]}

机构：

[1] Univ Calif Santa Cruz, Dept Earth & Planetary Sci, Santa Cruz, CA 95064 USA

[2] Univ Paris Diderot, Inst Phys Globe Paris, Sorbonne Paris Cite, Paris, France

[3] NASA, George C Marshall Space Flight Ctr, Huntsville, AL 35812 USA

[4] Lunar & Planetary Inst, Ctr Lunar Sci & Explorat, Houston, TX 77058 USA

[5] Colorado Sch Mines, Dept Geophys, Golden, CO 80401 USA

[6] Colorado Sch Mines, Ctr Space Resources, Golden, CO 80401 USA

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

来源：

GEOPHYSICAL RESEARCH LETTERS | 2014年 / 41卷 / 16期

关键词：

Moon; Lunar crust; Density; Porosity; Admittance; Gravity; SPECTRAL ESTIMATION; INTERNAL STRUCTURE; HEAT-FLOW; MOON; INTERIOR; FIELD; MODEL;

D O I：

10.1002/2014GL060240

中图分类号：

P [天文学、地球科学];

学科分类号：

07 ;

摘要：

We analyzed data from the Gravity Recovery and Interior Laboratory (GRAIL) mission using a localized admittance approach to map out spatial variations in the vertical density structure of the lunar crust. Mare regions are characterized by a distinct decrease in density with depth, while the farside is characterized by an increase in density with depth at an average gradient of approximate to 35kgm(-3)km(-1) and typical surface porosities of at least 20%. The Apollo 12 and 14 landing site region has a similar density structure to the farside, permitting a comparison with seismic velocity profiles. The interior of the South Pole-Aitken (SP-A) impact basin appears distinct with a near-surface low-density (porous) layer 2-3 times thinner than the rest of the farside. This result suggests that redistribution of material during the large SP-A impact likely played a major role in sculpting the lunar crust.

引用

页码：5771 / 5777

页数：7

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