Clay mineral‐organic matter relationships in the early solar system

EAS Publications Series

2012

Abstract. The most primitive chondrites and comets have undergone few modifications during the 4.56 billion years of the Solar System and can deliver to laboratories the components that witnessed the origin of the protosolar nebula. These components include organics, water and other volatile components that were formed in the parent molecular cloud of the solar system or during the protosolar epoch. This paper focuses on organic matter, water and noble gases contained in carbonaceous chondrites with a special emphasis on opened questions that could be assessed by laboratory experiments in order to shed new light on the origin of the solar system materials and planets.

“…It is found in the matrix of chondrites, associated with phyllosilicates (Pearson et al 2002). Organics likely accreted with other volatiles components in the matrix.…”

Section: How Did the Organics In Carbonacenous Chondrites Form?mentioning

confidence: 99%

Organic material and gases in the early Solar System : the meteorite record

EAS Publications Series

2012

“…This can be done at several scales. At the macroscopic scale, it appears that the organic matter is located in the matrix of chondrites, associated with phyllosilicates [81]. Osmium tetroxide vapour impregnation [84] labels specifically organic compounds in rocks and reveals that chondrules and CAIs are free of organic matter.…”

Section: Distribution Of the Iom: Understanding The Accretion Processmentioning

confidence: 99%

“…Location of organic matter in chondrites revealed by several techniques (the name of the corresponding meteorite is indicated into brackets). A and B: Osmium labelling reveals that organic matter occurs in the matrix, the chondrule being free of organic matter [81]. C: By fluorescence microscopy, organic matter (white structures) appear as isolated particles, with sizes ranging from 0.5 up to 4 microns randomly distributed in the matrix [82].…”

Section: Diversity Among the Different Types Of Chondrites: Influencementioning

confidence: 99%

Organic and volatile elements in the solar system

2011

EPJ Web of Conferences

Abstract. Chondrites and comets have accreted primitive materials from the early solar system. Those materials include organics, water and other volatile components. The most primitive chondrites and comets have undergone few modifications on their respective parent bodies and can deliver to laboratories components that were present at the origin of the protosolar nebula. Here I present a review of the organic material and volatile components that have been studied in the most primitive chondrites, and the last data from the stardust mission about the cometary record. This paper focuses on materials that can be studied in laboratories, by mass spectrometry, ion probes or organic chemistry techniques.

“…The reduced CV also exhibit the same trend, though the range of D/H ratio is much smaller (a few hundred of permil compared to several thousands of permil in delta units). It must be EPOV 2012 03001-p. 5 noted that the lowest isotopic enrichment was measured in Abee enstatite chondrite (δD = -480 ‰; D/H = 80×10 -6 ) [56,57]. Isotopic imaging has revealed that H isotopes can exhibit large variations in the IOM of CI, CM and CR chondrites with the occurrence of D-rich " hot spots": micron sized areas with large positive D anomalies (figure 3), which could go up to δD = 8000 ‰ (D/H=1402×10 -6 ; [58][59][60]).…”

Section: Water In Chondritesmentioning

confidence: 99%

“…It is found in the matrix of chondrites, associated with phyllosilicates [5]. Organics likely accreted with other volatiles components in the matrix.…”

Section: Introductionmentioning

confidence: 99%

Organic material in meteorites and the link to the origin of life

2014

BIO Web of Conferences

Abstract. Life requires specific conditions that have been, so far, only proven to meet on Earth. Though the chemical elements required to form living organism (C, H, N, O, S, etc) are widespread in the universe, the molecules that are crucial for Life, like nucleobases or amino acids, may not be so ubiquitous. The question of the formation of small and complex molecules is highly relevant to understand the process of Life origin. Carbonaceous chondrites are a class of meteorites rich in organic compounds and host potential precursors for the emergence of Life (organic matter and water). They could have been the source of complex molecules on the early Earth. This contribution will describe the main properties of the organic matter recovered from carbonaceous chondrites. However, the isotopic and molecular record of organic compounds is faded by secondary processes that occurred on the parent body of these meteorites. This results in complex signatures that raise multiple questions about the origin of organic compounds in the Solar System.