Mineralogy, aqueous alteration, and primitive textural characteristics of fine-grained rims in the Y-791198 CM2 carbonaceous chondrite: TEM observations and comparison to ALHA81002

2008 ◽  
Vol 72 (2) ◽  
pp. 602-625 ◽  
Author(s):  
Lysa J. Chizmadia ◽  
Adrian J. Brearley
Keyword(s):  
Carbonaceous Chondrite ◽  
Aqueous Alteration ◽  
Textural Characteristics ◽  
Fine Grained

scholarly journals Images from the surface of asteroid Ryugu show rocks similar to carbonaceous chondrite meteorites

Science ◽  
2019 ◽  
Vol 365 (6455) ◽  
pp. 817-820 ◽  
Author(s):  
R. Jaumann ◽  
N. Schmitz ◽  
T.-M. Ho ◽  
S. E. Schröder ◽  
K. A. Otto ◽  
...  
Keyword(s):  
Solar Nebula ◽  
Carbonaceous Chondrite ◽  
Aqueous Alteration ◽  
Earth Asteroid ◽  
Fine Grained ◽  
Dark Object ◽  
Sharp Edges ◽  
Fine Grained Material ◽  
Asteroid Surface

The near-Earth asteroid (162173) Ryugu is a 900-m-diameter dark object expected to contain primordial material from the solar nebula. The Mobile Asteroid Surface Scout (MASCOT) landed on Ryugu’s surface on 3 October 2018. We present images from the MASCOT camera (MASCam) taken during the descent and while on the surface. The surface is covered by decimeter- to meter-sized rocks, with no deposits of fine-grained material. Rocks appear either bright, with smooth faces and sharp edges, or dark, with a cauliflower-like, crumbly surface. Close-up images of a rock of the latter type reveal a dark matrix with small, bright, spectrally different inclusions, implying that it did not experience extensive aqueous alteration. The inclusions appear similar to those in carbonaceous chondrite meteorites.

scholarly journals Intense aqueous alteration on C-type asteroids: Perspectives from giant fine-grained micrometeorites

2019 ◽  
Vol 245 ◽  
pp. 352-373 ◽  
Author(s):  
M.D. Suttle ◽  
L. Folco ◽  
M.J. Genge ◽  
S.S. Russell ◽  
J. Najorka ◽  
...  
Keyword(s):  
Aqueous Alteration ◽  
Fine Grained

scholarly journals Clasts in the CM 2 carbonaceous chondrite Lonewolf Nunataks 94101: Evidence for aqueous alteration prior to complex mixing

2013 ◽  
Vol 48 (6) ◽  
pp. 1074-1090 ◽  
Author(s):  
Paula Lindgren ◽  
Martin R. Lee ◽  
Mahmood R. Sofe ◽  
Michael E. Zolensky
Keyword(s):  
Carbonaceous Chondrite ◽  
Aqueous Alteration

Aqueous alteration in the Kaba CV3 carbonaceous chondrite

1990 ◽  
Vol 54 (7) ◽  
pp. 2113-2120 ◽  
Author(s):  
Lindsay P Keller ◽  
Peter R Buseck
Keyword(s):  
Carbonaceous Chondrite ◽  
Aqueous Alteration

Aqueous alteration of opaque assemblages in the Ningqiang carbonaceous chondrite: Evidence from oxygen isotopes

2006 ◽  
Vol 243 (1-2) ◽  
pp. 107-114 ◽  
Author(s):  
W HSU ◽  
Y GUAN ◽  
X HUA ◽  
Y WANG ◽  
L LESHIN ◽  
...  
Keyword(s):  
Oxygen Isotopes ◽  
Carbonaceous Chondrite ◽  
Aqueous Alteration

Bright carbonate veins on asteroid (101955) Bennu: Implications for aqueous alteration history

Science ◽  
2020 ◽  
Vol 370 (6517) ◽  
pp. eabc3557 ◽  
Author(s):  
H. H. Kaplan ◽  
D. S. Lauretta ◽  
A. A. Simon ◽  
V. E. Hamilton ◽  
D. N. DellaGiustina ◽  
...  
Keyword(s):  
Fluid Flow ◽  
Solar System ◽  
Hydrothermal Alteration ◽  
Large Scale ◽  
Carbonaceous Chondrite ◽  
Parent Body ◽  
Early Solar System ◽  
Aqueous Alteration ◽  
Insight Into ◽  
Geologic Processes

The composition of asteroids and their connection to meteorites provide insight into geologic processes that occurred in the early Solar System. We present spectra of the Nightingale crater region on near-Earth asteroid Bennu with a distinct infrared absorption around 3.4 micrometers. Corresponding images of boulders show centimeters-thick, roughly meter-long bright veins. We interpret the veins as being composed of carbonates, similar to those found in aqueously altered carbonaceous chondrite meteorites. If the veins on Bennu are carbonates, fluid flow and hydrothermal deposition on Bennu’s parent body would have occurred on kilometer scales for thousands to millions of years. This suggests large-scale, open-system hydrothermal alteration of carbonaceous asteroids in the early Solar System.

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