Evidence for Young Volcanism on Mercury from the Third MESSENGER Flyby

被引：84

作者：

Prockter, Louise M. ^{[1
]}

Ernst, Carolyn M. ^{[1
]}

Denevi, Brett W. ^{[2
]}

Chapman, Clark R. ^{[3
]}

Head, James W., III ^{[4
]}

Fassett, Caleb I. ^{[4
]}

Merline, William J. ^{[3
]}

Solomon, Sean C. ^{[5
]}

Watters, Thomas R. ^{[6
]}

Strom, Robert G. ^{[7
]}

Cremonese, Gabriele ^{[8
]}

Marchi, Simone ^{[9
]}

Massironi, Matteo ^{[10
]}

机构：

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

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

[3] SW Res Inst, Boulder, CO 80302 USA

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

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

[6] Smithsonian Inst, Natl Air & Space Museum, Ctr Earth & Planetary Studies, Washington, DC 20013 USA

[7] Univ Arizona, Lunar & Planetary Lab, Tucson, AZ 85721 USA

[8] Astron Observ Padova, Inst Nazl Astrofis, I-35122 Padua, Italy

[9] Univ Padua, Dept Astron, I-35137 Padua, Italy

[10] Univ Padua, Dept Geosci, I-35137 Padua, Italy

来源：

SCIENCE | 2010年 / 329卷 / 5992期

关键词：

CRATERING RECORD; SMOOTH PLAINS; IMPACT BASINS; CALORIS BASIN; EVOLUTION; MISSION; GEOLOGY; VIEW;

D O I：

10.1126/science.1188186

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：

During its first two flybys of Mercury, the MESSENGER spacecraft acquired images confirming that pervasive volcanism occurred early in the planet's history. MESSENGER's third Mercury flyby revealed a 290-kilometer-diameter peak-ring impact basin, among the youngest basins yet seen, having an inner floor filled with spectrally distinct smooth plains. These plains are sparsely cratered, postdate the formation of the basin, apparently formed from material that once flowed across the surface, and are therefore interpreted to be volcanic in origin. An irregular depression surrounded by a halo of bright deposits northeast of the basin marks a candidate explosive volcanic vent larger than any previously identified on Mercury. Volcanism on the planet thus spanned a considerable duration, perhaps extending well into the second half of solar system history.

引用

页码：668 / 671

页数：4

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