Discovery of a New FUN CAI from a CV Carbonaceous Chondrite: Evidence for Multistage Thermal Processing in the Protoplanetary Disk

2008 ◽  
Vol 680 (2) ◽  
pp. L141-L144 ◽  
Author(s):  
Kristine Thrane ◽  
Kazuhide Nagashima ◽  
Alexander N. Krot ◽  
Martin Bizzarro
Keyword(s):  
Thermal Processing ◽  
Carbonaceous Chondrite ◽  
Protoplanetary Disk

Titanium isotopes and rare earth patterns in CAIs: Evidence for thermal processing and gas-dust decoupling in the protoplanetary disk

2018 ◽  
Vol 221 ◽  
pp. 275-295 ◽  
Author(s):  
Andrew M. Davis ◽  
Junjun Zhang ◽  
Nicolas D. Greber ◽  
Jingya Hu ◽  
François L.H. Tissot ◽  
...  
Keyword(s):  
Rare Earth ◽  
Thermal Processing ◽  
Protoplanetary Disk ◽  
Titanium Isotopes

Carbonaceous chondrite meteorites as a record of protoplanetary disk conditions

2019 ◽  
Vol 15 (S350) ◽  
pp. 135-138
Author(s):  
Sara S. Russell ◽  
Enrica Bonato ◽  
Helena Bates ◽  
Ashley J. King ◽  
Natasha V. Almeida ◽  
...  
Keyword(s):  
Organic Molecules ◽  
Carbonaceous Chondrite ◽  
Protoplanetary Disk ◽  
Parent Body ◽  
Carbonaceous Chondrites ◽  
Aqueous Processing ◽  
Chondritic Meteorites ◽  
Dust Component ◽  
Key Features ◽  
Complex Organic

AbstractChondritic meteorites, and especially the most volatile-rich chondrites, the carbonaceous chondrites, preserve a record of the solar protoplanetary disk dust component and how it has been changed both in the disk environment itself and in its asteroidal parent body. Here we review some of the key features of carbonaceous chondrites and report some new data on their organics component. These show that the nebula reached temperature of >10000C, but only very locally, to produce chondrules. Most meteoritic material underwent thermal and/or aqueous processing, but some retain delicate nebular components such as complex organic molecules and amorphous silicates.

The Absolute Chronology and Thermal Processing of Solids in the Solar Protoplanetary Disk

Science ◽  
2012 ◽  
Vol 338 (6107) ◽  
pp. 651-655 ◽  
Author(s):  
J. N. Connelly ◽  
M. Bizzarro ◽  
A. N. Krot ◽  
A. Nordlund ◽  
D. Wielandt ◽  
...  
Keyword(s):  
Thermal Processing ◽  
Protoplanetary Disk ◽  
The Absolute

scholarly journals Fumarolic-like activity on carbonaceous chondrite parent body

2020 ◽  
Vol 6 (27) ◽  
pp. eabb1166
Author(s):  
Clément Ganino ◽  
Guy Libourel
Keyword(s):  
High Temperature ◽  
Carbonaceous Chondrite ◽  
Protoplanetary Disk ◽  
Parent Body ◽  
Darcy Flow ◽  
Planetary Formation ◽  
Kurile Islands ◽  
Formation And Evolution ◽  
Comparative Planetology

Comparative planetology studies are key for understanding the main processes driving planetary formation and evolution. None have been yet applied to pristine asteroids formed in the solar protoplanetary disk, mainly because of their comminution during their 4.5-billion-year collisional lifetime. From remarkable textural, mineralogical, chemical, and thermodynamic similarities, we show that the high-temperature Kudryavy volcano fumarolic environment from Kurile Islands is a likely proxy of the Fe-alkali-halogen metasomatism on the CV and CO carbonaceous chondrite parent bodies. Ca-Fe–rich and Na-Al-Cl–rich secondary silicates in CV and CO chondrites are, thus, inferred to be fumarolic-like incrustations that precipitate from hot and reduced hydrothermal vapors after interactions with the wallrocks during buoyancy-driven Darcy flow percolation. These vapors may originate from the progressive heating and devolatilization of a chondritic protolith on their parent body or are remnant of the cooling of residual local nebular gases at the time of their primary planetesimal accretion.

scholarly journals Potassium isotope anomalies in meteorites inherited from the protosolar molecular cloud

2020 ◽  
Vol 6 (41) ◽  
pp. eabd0511 ◽  
Author(s):  
Y. Ku ◽  
S. B. Jacobsen
Keyword(s):  
Solar System ◽  
Isotopic Composition ◽  
Thermal Processing ◽  
Molecular Cloud ◽  
Protoplanetary Disk ◽  
The Sun ◽  
Volatile Elements ◽  
Heterogeneous Distribution ◽  
Solar System Bodies ◽  
K Depletion

Potassium (K) and other moderately volatile elements are depleted in many solar system bodies relative to CI chondrites, which closely match the composition of the Sun. These depletions and associated isotopic fractionations were initially believed to result from thermal processing in the protoplanetary disk, but so far, no correlation between the K depletion and its isotopic composition has been found. Our new high-precision K isotope data correlate with other neutron-rich nuclides (e.g., 64Ni and 54Cr) and suggest that the observed 41K variations have a nucleosynthetic origin. We propose that K isotope anomalies are inherited from an isotopically heterogeneous protosolar molecular cloud, and were preserved in bulk primitive meteorites. Thus, the heterogeneous distribution of both refractory and moderately volatile elements in chondritic meteorites points to a limited radial mixing in the protoplanetary disk.

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.

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