The Evolution of Mercury's Crust: A Global Perspective from MESSENGER

被引：187

作者：

Denevi, Brett W. ^{[1
]}

Robinson, Mark S. ^{[1
]}

Solomon, Sean C. ^{[2
]}

Murchie, Scott L. ^{[3
]}

Blewett, David T. ^{[3
]}

Domingue, Deborah L. ^{[3
]}

McCoy, Timothy J. ^{[4
]}

Ernst, Carolyn M. ^{[3
]}

Head, James W. ^{[5
]}

Watters, Thomas R. ^{[6
]}

Chabot, Nancy L. ^{[3
]}

机构：

[1] Arizona State Univ, Sch Earth & Space Explorat, Tempe, AZ 85251 USA

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

[3] Johns Hopkins Univ, Appl Phys Lab, Laurel, MD 20723 USA

[4] Smithsonian Inst, Natl Museum Nat Hist, Washington, DC 20560 USA

[5] Brown Univ, Dept Geol Sci, Providence, RI 02912 USA

[6] Smithsonian Inst, Natl Air & Space Museum, Ctr Earth & Planetary Studies, Washington, DC 20560 USA

来源：

SCIENCE | 2009年 / 324卷 / 5927期

关键词：

CRATERING RECORD; VOLCANISM; FLYBY; MOON; REFLECTANCE; MARINER-10; REGOLITH; MAP;

D O I：

10.1126/science.1172226

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：

Mapping the distribution and extent of major terrain types on a planet's surface helps to constrain the origin and evolution of its crust. Together, MESSENGER and Mariner 10 observations of Mercury now provide a near-global look at the planet, revealing lateral and vertical heterogeneities in the color and thus composition of Mercury's crust. Smooth plains cover approximately 40% of the surface, and evidence for the volcanic origin of large expanses of plains suggests that a substantial portion of the crust originated volcanically. A low-reflectance, relatively blue component affects at least 15% of the surface and is concentrated in crater and basin ejecta. Its spectral characteristics and likely origin at depth are consistent with its apparent excavation from a lower crust or upper mantle enriched in iron-and titanium-bearing oxides.

引用

页码：613 / 618

页数：6

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