scholarly journals Oxygen isotopic composition of chondritic interplanetary dust particles: A genetic link between carbonaceous chondrites and comets

2009 ◽  
Vol 73 (15) ◽  
pp. 4558-4575 ◽  
Author(s):  
J. Aléon ◽  
C. Engrand ◽  
L.A. Leshin ◽  
K.D. McKeegan
Keyword(s):  
Isotopic Composition ◽  
Interplanetary Dust ◽  
Oxygen Isotopic Composition ◽  
Dust Particles ◽  
Carbonaceous Chondrites ◽  
Interplanetary Dust Particles ◽  
Genetic Link ◽  
Oxygen Isotopic

The formation and alteration of the Renazzo-like carbonaceous chondrites I: Implications of bulk-oxygen isotopic composition

2011 ◽  
Vol 75 (1) ◽  
pp. 308-325 ◽  
Author(s):  
Devin L. Schrader ◽  
Ian A. Franchi ◽  
Harold C. Connolly ◽  
Richard C. Greenwood ◽  
Dante S. Lauretta ◽  
...  
Keyword(s):  
Isotopic Composition ◽  
Oxygen Isotopic Composition ◽  
Carbonaceous Chondrites ◽  
Bulk Oxygen ◽  
Oxygen Isotopic

scholarly journals Collection and Microanalysis of Antarctic Micrometeorites

1996 ◽  
Vol 150 ◽  
pp. 265-273 ◽  
Author(s):  
M. Maurette ◽  
C. Engrand ◽  
G. Kurat
Keyword(s):  
Interplanetary Dust ◽  
Dust Particles ◽  
Carbonaceous Chondrites ◽  
Interplanetary Dust Particles

AbstractMicrometeorites (MMs) represent the most common interplanetary dust particles (50-500 μm). They are similar to carbonaceous chondrites (CCs) but do not match, mineralogically and chemically, known CC types.

scholarly journals Carbonaceous Material in Extra-terrestrial Matter

2015 ◽  
Vol 11 (A29A) ◽  
pp. 257-260
Author(s):  
Zita Martins
Keyword(s):  
Amino Acids ◽  
Carbonaceous Material ◽  
Interplanetary Dust ◽  
Hypervelocity Impact ◽  
Dust Particles ◽  
Early Earth ◽  
Carbonaceous Chondrites ◽  
Interplanetary Dust Particles ◽  
Living Organisms ◽  
Impact Shock

AbstractComets, asteroids, meteorites, micrometeorites, interplanetary dust particles (IDPs), and ultra-carbonaceous Antarctic micrometeorites (UCAMMs) may contain carbonaceous material, which was exogenously delivered to the early Earth. Carbonaceous chondrites have an enormous variety of extra-terrestrial compounds, including all the key compounds important in terrestrial biochemistry. Comets contain several carbon-rich species and, in addition, the hypervelocity impact-shock of a comet can produce several α-amino acids. The analysis of the carbonaceous content of extra-terrestrial matter provides a window into the resources delivered to the early Earth, which may have been used by the first living organisms.

Magnesium Isotopic Composition of Interplanetary Dust Particles

Science ◽  
1979 ◽  
Vol 206 (4415) ◽  
pp. 190-197 ◽  
Author(s):  
T. M. Esat ◽  
D. E. Brownlee ◽  
D. A. Papanastassiou ◽  
G. J. Wasserburg
Keyword(s):  
Isotopic Composition ◽  
Interplanetary Dust ◽  
Dust Particles ◽  
Interplanetary Dust Particles

scholarly journals Aqueous Alteration in Hydrated Interplanetary Dust Particles

1991 ◽  
Vol 126 ◽  
pp. 71-78
Author(s):  
Kazushige Tomeoka
Keyword(s):  
Significant Proportion ◽  
Interplanetary Dust ◽  
Chemical Data ◽  
Dust Particles ◽  
Carbonaceous Chondrites ◽  
Interplanetary Dust Particles ◽  
Aqueous Alteration ◽  
Mineralogical Characteristics ◽  
Type Studies ◽  
Considerable Detail

AbstractInterplanetary dust particles (IDPs) characterized by chondritic composition can be divided into two principal groups, anhydrous and hydrated. This paper summarizes recent results of mineralogical and petrological studies dealing with the IDPs of hydrated type. Studies on mineralogical characteristics, infrared absorption spectra, and isotopic properties of the hydrated particles have suggested that they are primitive and may contain surviving interstellar material. The hydrated IDPs consist in major part of layer silicates and resemble CI and CM carbonaceous chondrites. Mineralogical and chemical data of both IDPs and carbonaceous chondrites have accumulated, and it is now possible to compare the mineralogies of the IDPs and the meteorites in considerable detail. Evidence was found that a significant proportion of the hydrated IDPs have been processed by aqueous alteration, and the nature of the alteration resembles that of similarly affected meteorites. The mineralogical and chemical data provide important clues to the possible origins of IDPs.

Changes of Ionic and Oxygen Isotopic Composition of the Snowpack at the Glacier Austre Okstindbreen, Norway, 1995

1998 ◽  
Vol 29 (1) ◽  
pp. 1-20 ◽  
Author(s):  
Peter Raben ◽  
Wilfred H. Theakstone
Keyword(s):  
Isotopic Composition ◽  
Sea Level ◽  
Oxygen Isotopes ◽  
Oxygen Isotopic Composition ◽  
Isotopic Ratios ◽  
Vertical Variations ◽  
Oxygen Isotopic ◽  
The Difference ◽  
Liquid Precipitation ◽  
Different Altitudes

Marked vertical variations of ions and oxygen isotopes were present in the snowpack at the glacier Austre Okstindbreen during the pre-melting phase in 1995 at sites between 825 m and 1,470 m above sea level. As the first meltwater percolated from the top of the pack, ions were moved to a greater depth, but the isotopic composition remained relatively unchanged. Ions continued to move downwards through the pack during the melting phase, even when there was little surface melting and no addition of liquid precipitation. The at-a-depth correlation between ionic concentrations and isotopic ratios, strong in the pre-melting phase, weakened during melting. In August, concentrations of Na+ and Mg2+ ions in the residual pack were low and vertical variations were slight; 18O enrichment had occurred. The difference of the time at which melting of the snowpack starts at different altitudes influences the input of ions and isotopes to the underlying glacier.

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