Morphological Biosignatures in Early Terrestrial and Extraterrestrial Materials

2008 ◽  
pp. 95-114 ◽  
Author(s):  
Frances Westall
Keyword(s):  
Extraterrestrial Materials

scholarly journals The global accretion rate of extraterrestrial materials in the last glacial period estimated from the abundance of micrometeorites in Antarctic glacier ice

2004 ◽  
Vol 56 (1) ◽  
pp. 67-79 ◽  
Author(s):  
Toru Yada ◽  
Tomoki Nakamura ◽  
Nobuo Takaoka ◽  
Takaaki Noguchi ◽  
Kentaro Terada ◽  
...  
Keyword(s):  
Accretion Rate ◽  
Glacial Period ◽  
Last Glacial Period ◽  
Last Glacial ◽  
Glacier Ice ◽  
Extraterrestrial Materials ◽  
The Last Glacial

Cosmogenic nuclides in extraterrestrial materials

1990 ◽  
Vol 28 (3) ◽  
pp. 253 ◽  
Author(s):  
S. Vogt ◽  
G. F. Herzog ◽  
R. C. Reedy
Keyword(s):  
Cosmogenic Nuclides ◽  
Extraterrestrial Materials

Extraterrestrial Materials

2000 ◽  
Author(s):  
Donald E. Brownlee
Keyword(s):  
Extraterrestrial Materials

Scanning Electron Microscopy And Electron Probe Microanalysis Of Extraterrestrial Materials

1999 ◽  
Vol 5 (S2) ◽  
pp. 2-3
Author(s):  
J. I. Goldstein
Keyword(s):  
Electron Microscopy ◽  
Low Temperatures ◽  
Electron Probe ◽  
Iron Meteorite ◽  
The Moon ◽  
Iron Meteorites ◽  
Slow Cooling ◽  
Electron Probe Microanalyzer ◽  
Extraterrestrial Materials ◽  
Scanning Electron

One of the first samples analyzed by Castaing in his electron probe microanalyzer (EPMA) some 50 years ago was an iron meteorite. The Widmanstatten pattern microstructure of iron meteorites can be observed at very low magnifications ( Fig. 1). These meteorites are ideal samples for microanalysis because of the Ni gradient which extends over 10 to 1000 microns in the parent taenite phase of these Fe-Ni samples (Fig. 3). The Ni gradient is the result of very slow cooling of the iron meteorite, in terms of millions of years, within a parent'asteroid.The scanning electron microscope (SEM) has been used to characterize the microstructure of meteorites, as well as samples from the moon and mars. For example, the microstructure of the dark etching taenite areas (T in Fig. 1) of the Carleton iron meteorite is shown in Fig 2. In this example, precipitates are observed along original martensite laths which form during the cooling of the iron meteorite at low temperatures.

scholarly journals Crystal Chemistry of Amphibole Minerals in Extraterrestrial Materials and Implications for Their Formation History

2011 ◽  
Vol 53 (1) ◽  
pp. 64-69
Author(s):  
Takashi MIKOUCHI ◽  
Akira MONKAWA ◽  
Kazumasa SUGIYAMA
Keyword(s):  
Crystal Chemistry ◽  
Formation History ◽  
Extraterrestrial Materials

Extraterrestrial Materials (K–Ar/Ar–Ar)

2013 ◽  
pp. 1-6
Author(s):  
Timothy Swindle
Keyword(s):  
Extraterrestrial Materials
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