Distribution of phyllosilicates on the surface of Ceres

被引：160

作者：

Ammannito, E. ^{[1
]}

DeSanctis, M. C. ^{[2
]}

Ciarniello, M. ^{[2
]}

Frigeri, A. ^{[2
]}

Carrozzo, F. G. ^{[2
]}

Combe, J. -Ph. ^{[3
]}

Ehlmann, B. L. ^{[4
,5
]}

Marchi, S. ^{[6
]}

McSween, H. Y. ^{[7
]}

Raponi, A. ^{[2
]}

Toplis, M. J. ^{[8
]}

Tosi, F. ^{[2
]}

Castillo-Rogez, J. C. ^{[5
]}

Capaccioni, F. ^{[2
]}

Capria, M. T. ^{[2
]}

Fonte, S. ^{[2
]}

Giardino, M. ^{[2
]}

Jaumann, R. ^{[9
]}

Longobardo, A. ^{[2
]}

Joy, S. P. ^{[1
]}

Magni, G. ^{[2
]}

McCord, T. B. ^{[3
]}

McFadden, L. A. ^{[10
]}

Palomba, E. ^{[2
]}

Pieters, C. M. ^{[11
]}

Polanskey, C. A. ^{[5
]}

Rayman, M. D. ^{[5
]}

Raymond, C. A. ^{[5
]}

Schenk, P. M. ^{[12
]}

Zambon, F. ^{[2
]}

Russell, C. T. ^{[1
]}

机构：

[1] Univ Calif Los Angeles, Earth Planetary & Space Sci, 603 Charles Young Dr, Los Angeles, CA 90095 USA

[2] Ist Nazl Astrofis, Ist Astrofis & Planetol Spaziali, I-00133 Rome, Italy

[3] Bear Fight Inst, Winthrop, WA 98862 USA

[4] CALTECH, Div Geol & Planetary Sci, Pasadena, CA 91125 USA

[5] CALTECH, Jet Prop Lab, 4800 Oak Grove Dr, Pasadena, CA 91109 USA

[6] Southwest Res Inst, Boulder, CO 80302 USA

[7] Univ Tennessee, Dept Earth & Planetary Sci, Knoxville, TN 37996 USA

[8] Univ Toulouse, UMR 5277, Inst Rech Astrophys & Planetol, F-31400 Toulouse, France

[9] Deutsch Zentrum Luft & Raumfahrt, Inst Planetary Res, D-12489 Berlin, Germany

[10] NASA, Goddard Space Flight Ctr, Greenbelt, MD 20771 USA

[11] Brown Univ, Dept Earth Environm & Planetary Sci, Providence, RI 02912 USA

[12] Lunar & Planetary Inst, 3303 NASA Rd 1, Houston, TX 77058 USA

来源：

SCIENCE | 2016年 / 353卷 / 6303期

关键词：

ASTEROID SPECTROSCOPIC SURVEY; EMISSION-SPECTROSCOPY; CLAY-MINERALS; DAWN MISSION; PHASE-II; WATER; SMECTITES; AMMONIUM; SPECTRA;

D O I：

10.1126/science.aaf4279

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：

The dwarf planet Ceres is known to host phyllosilicate minerals at its surface, but their distribution and origin have not previously been determined. We used the spectrometer onboard the Dawn spacecraft to map their spatial distribution on the basis of diagnostic absorption features in the visible and near-infrared spectral range (0.25 to 5.0 micrometers). We found that magnesium-and ammonium-bearing minerals are ubiquitous across the surface. Variations in the strength of the absorption features are spatially correlated and indicate considerable variability in the relative abundance of the phyllosilicates, although their composition is fairly uniform. These data, along with the distinctive spectral properties of Ceres relative to other asteroids and carbonaceous meteorites, indicate that the phyllosilicates were formed endogenously by a globally widespread and extensive alteration process.

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页数：5

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