Complementary nucleosynthetic isotope anomalies of Mo and W in chondrules and matrix in the Allende carbonaceous chondrite: The case for hydrothermal metamorphism and its implications

2021 ◽  
Author(s):  
Ian S. Sanders ◽  
Edward R. D. Scott ◽  
Alexander Krot
Keyword(s):  
Carbonaceous Chondrite ◽  
Hydrothermal Metamorphism

HRTEM study of valleriite, a hydroxide-bearing copper sulfide

1990 ◽  
Vol 48 (4) ◽  
pp. 462-463
Author(s):  
S. Wang ◽  
P. R. Buseck
Keyword(s):  
Electron Microscope ◽  
High Resolution ◽  
Copper Sulfide ◽  
Carbonaceous Chondrite ◽  
Structural Data ◽  
Basic Structure ◽  
Long Period ◽  
Selected Area Electron Diffraction ◽  
Transmission Electron ◽  
Wavy Structure

Valleriite is an unusual mineral, consisting of intergrowths of sulfide layers (corresponding in structure to the mineral smythite - Fe9S11) and hydroxide layers (corresponding to brucite - Mg(OH2)). It has a composition of approximately 1.526[Mg.68Al.32(OH)2].[Fe1.07Cu.93S2] and consists of two interpenetrating lattices, each of which retains its individual structural and diffraction characteristics parallel to the layering. The valleriite structure is related to that of tochilinite, an unusual iron-rich mineral that is of considerable interest for the origin of certain carbonaceous chondrite meteorites and to those of franckeite and cylindrite, two minerals that are of interest because of their unique morphological and crystallographic properties, e.g., the distinctive curved form of cylindrite and the perfect mica-like cleavage with unusual striations and the long-period wavy structure of franckeite.Our selected-area electron diffraction (SAED) patterns and high-resolution transmission electron microscope (HRTEM) images of valleriite provide new structural data. A basic structure and a new superstructure have been observed.

NanoSIMS analysis and Auger electron spectroscopy of silicate and oxide stardust from the carbonaceous chondrite Acfer 094

2009 ◽  
Vol 73 (23) ◽  
pp. 7127-7149 ◽  
Author(s):  
Christian Vollmer ◽  
Peter Hoppe ◽  
Frank J. Stadermann ◽  
Christine Floss ◽  
Frank E. Brenker
Keyword(s):  
Auger Electron Spectroscopy ◽  
Electron Spectroscopy ◽  
Auger Electron ◽  
Carbonaceous Chondrite ◽  
Nanosims Analysis

scholarly journals Characterizing the spectral, microstructural, and chemical effects of solar wind irradiation on the Murchison carbonaceous chondrite through coordinated analyses

Icarus ◽  
2021 ◽  
pp. 114479
Author(s):  
D.L. Laczniak ◽  
M.S. Thompson ◽  
R. Christoffersen ◽  
C.A. Dukes ◽  
S.J. Clemett ◽  
...  
Keyword(s):  
Solar Wind ◽  
Carbonaceous Chondrite ◽  
Chemical Effects

scholarly journals Organic matter in carbonaceous chondrite lithologies of Almahata Sitta: Incorporation of previously unsampled carbonaceous chondrite lithologies into ureilitic regolith

2021 ◽  
Author(s):  
Yoko Kebukawa ◽  
Michael. E. Zolensky ◽  
Cyrena A. Goodrich ◽  
Motoo Ito ◽  
Nanako O. Ogawa ◽  
...  
Keyword(s):  
Organic Matter ◽  
Carbonaceous Chondrite

Petrology and classification of A‐9003, A 09535, and Y‐82094: A new type of carbonaceous chondrite

2021 ◽  
Author(s):  
M. Kimura ◽  
R. C. Greenwood ◽  
M. Komatsu ◽  
N. Imae ◽  
A. Yamaguchi ◽  
...  
Keyword(s):  
Carbonaceous Chondrite ◽  
New Type

scholarly journals A carbonaceous chondrite and cometary origin for icy moons of Jupiter and Saturn

2020 ◽  
Vol 530 ◽  
pp. 115920 ◽  
Author(s):  
Adrien Néri ◽  
François Guyot ◽  
Bruno Reynard ◽  
Christophe Sotin
Keyword(s):  
Carbonaceous Chondrite ◽  
Icy Moons ◽  
Cometary Origin

scholarly journals CM carbonaceous chondrite falls and their terrestrial alteration

2021 ◽  
Author(s):  
Martin R. Lee ◽  
Luke Daly ◽  
Cameron Floyd ◽  
Pierre‐Etienne Martin
Keyword(s):  
Carbonaceous Chondrite

Occurrence and Significance of Formaldehyde in the Allende Carbonaceous Chondrite

Nature ◽  
1972 ◽  
Vol 236 (5343) ◽  
pp. 155-158 ◽  
Author(s):  
IRVING A. BREGER ◽  
PETER ZUBOVIC ◽  
JOHN C. CHANDLER ◽  
ROY S. CLARKE
Keyword(s):  
Carbonaceous Chondrite
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