scholarly journals Thermal metamorphism of CM chondrites: A dehydroxylation‐based peak‐temperature thermometer and implications for sample return from asteroids Ryugu and Bennu

2021 ◽  
Author(s):  
Michael A. Velbel ◽  
Michael E. Zolensky
Keyword(s):  
Peak Temperature ◽  
Sample Return ◽  
Thermal Metamorphism

scholarly journals The Effect of Aqueous Alteration and Metamorphism in the Survival of Presolar Silicate Grains in Chondrites

2009 ◽  
Vol 26 (3) ◽  
pp. 289-296 ◽  
Author(s):  
Josep M. Trigo-Rodriguez ◽  
Jürgen Blum
Keyword(s):  
Relative Abundance ◽  
Shock Metamorphism ◽  
Clear Pattern ◽  
Aqueous Alteration ◽  
Sample Return ◽  
Presolar Grains ◽  
Thermal Metamorphism ◽  
General Overview ◽  
Marco Polo ◽  
Different Types

AbstractRelatively small amounts (typically between 2 and 200 ppm) of presolar grains have been preserved in the matrices of chondritic meteorites. The measured abundances of the different types of grains are highly variable from one chondrite to another, but are higher in unequilibrated chondrites that have experienced little or no aqueous alteration and/or metamorphic heating than in processed meteorites. A general overview of the abundances measured in presolar grains (particularly the recently identified presolar silicates) contained in primitive chondrites is presented. Here we will focus on the most primitive chondrite groups, as typically the highest measured abundances of presolar grains occur in primitive chondrites that have experienced little thermal metamorphism. Looking at the most aqueously altered chondrite groups, we find a clear pattern of decreasing abundance of presolar silicate grains with increasing levels of aqueous alteration. We conclude that measured abundances of presolar grains in altered chondrites are strongly biased by their peculiar histories. Scales quantifying the intensity of aqueous alteration and shock metamorphism in chondrites could correlate with the content of presolar silicates. To do this it would be required to infer the degree of destruction or homogenization of presolar grains in the matrices of primitive meteorites. To get an unbiased picture of the relative abundance of presolar grains in the different regions of the protoplanetary disk where first meteorites consolidated, future dedicated studies of primitive meteorites, IDPs, and collected materials from sample-return missions (like e.g. the planned Marco Polo) are urgently required.

scholarly journals Timing of thermal metamorphism in CM chondrites: Implications for Ryugu and Bennu future sample return

Icarus ◽  
2020 ◽  
Vol 339 ◽  
pp. 113593 ◽  
Author(s):  
Elsa Amsellem ◽  
Frédéric Moynier ◽  
Brandon Mahan ◽  
Pierre Beck
Keyword(s):  
Sample Return ◽  
Thermal Metamorphism ◽  
Future Sample

Beacon Tracking System and Its Performance in Search Operation for Hayabusa Sample Return Capsule

2011 ◽  
Vol E94-B (11) ◽  
pp. 2961-2968
Author(s):  
Takahide MIZUNO ◽  
Kousuke KAWAHARA ◽  
Kazuhiko YAMADA ◽  
Yukio KAMATA ◽  
Tetsuya YAMADA ◽  
...  
Keyword(s):  
Tracking System ◽  
Sample Return ◽  
Search Operation

Aeroassist vehicle requirements for a Mars Rover/Sample Return Mission

1988 ◽  
Author(s):  
ROBERT MEYERSON ◽  
CHRISTOPHER CERIMELE
Keyword(s):  
Mars Rover ◽  
Sample Return ◽  
Sample Return Mission

Orbit/deorbit analysis for the Mars rover sample return mission

1988 ◽  
Author(s):  
PAUL PENZO
Keyword(s):  
Mars Rover ◽  
Sample Return ◽  
Sample Return Mission

Mars Rover Sample Return - Rover challenges

1988 ◽  
Author(s):  
LEW ALLEN
Keyword(s):  
Mars Rover ◽  
Sample Return

Mars Rover Sample Return mission delivery and return challenges

1988 ◽  
Author(s):  
AARON COHEN
Keyword(s):  
Mars Rover ◽  
Sample Return ◽  
Sample Return Mission

Technologies for Mars exploration and sample return

1999 ◽  
Author(s):  
Carl Ruoff
Keyword(s):  
Mars Exploration ◽  
Sample Return
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