The elemental composition of asteroid 433 Eros:: Results of the NEAR-Shoemaker x-ray spectrometer

被引：103
|
作者：
Trombka, JI
Squyres, SW
Brückner, J
Boynton, WV
Reedy, RC
McCoy, TJ
Gorenstein, P
Evans, LG
Arnold, JR
Starr, RD
Nittler, LR
Murphy, ME
Mikheeva, I
McNutt, RL
McClanahan, TP
McCartney, E
Goldsten, JO
Gold, RE
Floyd, SR
Clark, PE
Burbine, TH
Bhangoo, JS
Bailey, SH
Petaev, M
机构：
[1] NASA, Goddard Space Flight Ctr, Greenbelt, MD 20771 USA
[2] Cornell Univ, Ithaca, NY 14853 USA
[3] Max Planck Inst Chem, D-55020 Mainz, Germany
[4] Univ Arizona, Dept Planetary Sci, Tucson, AZ 85721 USA
[5] Los Alamos Natl Lab, Los Alamos, NM 87545 USA
[6] Smithsonian Inst, Natl Museum Nat Hist, Dept Mineral Sci, Washington, DC 20560 USA
[7] Smithsonian Astrophys Observ, Cambridge, MA 02138 USA
[8] Comp Sci Corp, Syst Sci Div, Laurel, MD 20707 USA
[9] Univ Calif San Diego, La Jolla, CA 92093 USA
[10] Catholic Univ Amer, Dept Phys, Washington, DC 20064 USA
[11] Johns Hopkins Univ, Appl Phys Lab, Laurel, MD 20723 USA
来源：
SCIENCE | 2000年 / 289卷 / 5487期
关键词：
D O I：
10.1126/science.289.5487.2101
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：
We report major element composition ratios for regions of the asteroid 433 Eros imaged during two solar flares and quiet sun conditions during the period of May to July 2000, Low aluminum abundances for all regions argue against global differentiation of Eros. Magnesium/silicon, aluminum/silicon, calcium/silicon, and iron/silicon ratios are best interpreted as a relatively primitive, chondritic composition. Marked depletions in sulfur and possible aluminum and calcium depletions, relative to ordinary chondrites, may represent signatures of Limited partial melting or impact volatilization.
引用
收藏
页码：2101 / 2105
页数：5
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