Publication
- Names
-
- L. Bonal
- C.M.O'D. Alexander
- G.R. Huss
- K. Nagashima
- E. Quirico
- P. Beck
- Title
- Hydrogen isotopic composition of the water in CR chondrites
- Abstract
- The thermal and aqueous alteration experienced by QUE 99177, MET 00426, EET 92042, GRA 95229, Renazzo and Al Rais CR chondrites was assessed through multi-technique characterization of their the carbonaceous matter and hydrated mineral phases. Each of the chondrites escaped long duration thermal metamorphism as reflected by the low structural order of the polyaromatic carbonaceous matter assessed by Raman spectroscopy. The infrared spectra of the matrix grains clearly reveal the presence of hydrated minerals in each of the CR chondrites. In particular, the extent of aqueous alteration experienced by QUE 99177 and MET 00426 may have been previously underestimated. The H isotopic compositions of the altering fluids were measured in situ in fine-grained phyllosilicates and individual coarse-grained hydrated silicates. In the analyzed CR chondrites, the main observations are that (i) the water is systematically enriched in D, and the enrichments (δDwater up to 1600‰) can be even higher than the highest D-enrichments reported for cometary water; (ii) the isotopic composition of the water is highly variable at the micrometer scale; (iii) there is no clear trend observed in the isotopic composition of the water (maximum D-enrichment, range of variation) along the aqueous alteration sequence. The D-enrichments and spatial variability are easier to explain as secondary signatures acquired through parent body processes, rather than as being due to the accretion of at least two ices with distinct isotopic compositions and sources that did not fully mix when they melted at the start of the aqueous alteration process.
- Keywords
- spectroscopy, Raman micro-spectrometer, FTIR micro-spectrometer, carbonaceous chondrites, CR chondrites, meteorite QUE 99177, meteorite MET 00426, meteorite EET 92042, meteorite Renazzo, meteorite Al Rais, meteorite GRA 95229
- Content
- material-matter, spectral data
- Year
- 2013
- Journal
- Geochimica et Cosmochimica Acta
- Volume
- 106
- Pages
- 111 - 133
- Pages number
- 23
- Document type
- article
- Publication state
- published
- Doi
- 10.1016/j.gca.2012.12.009
- Identifiers
- Experiment/Spectra
-
- normalized and baseline-corrected MIR transmission spectrum of matrix grains of MET00426 pressed on diamond window under vacuum heated at 300C
- normalized and baseline-corrected MIR transmission spectrum of matrix grains of MET00426 pressed on diamond window under vacuum heated at 300C
- normalized and baseline-corrected MIR transmission spectrum of matrix grains of MET00426 pressed on diamond window under vacuum heated at 300C
- normalized and baseline-corrected MIR transmission spectrum of matrix grains of MET00426 pressed on diamond window under vacuum heated at 300C
- normalized and baseline-corrected MIR transmission spectrum of matrix grains of MET00426 pressed on diamond window under vacuum heated at 300C
- normalized and baseline-corrected MIR transmission spectrum of matrix grains of MET00426 pressed on diamond window under vacuum heated at 300C
- MIR transmission spectrum of matrix grains of GRA95229 pressed on diamond window under vacuum heated at 300C
- MIR transmission spectrum of matrix grains of GRA95229 pressed on diamond window under vacuum heated at 300C
- MIR transmission spectrum of matrix grains of GRA95229 pressed on diamond window under vacuum heated at 300C
- MIR transmission spectrum of matrix grains of GRA95229 pressed on diamond window under vacuum heated at 300C
- MIR transmission spectrum of matrix grains of GRA95229 pressed on diamond window under vacuum heated at 300C
- normalized and baseline-corrected MIR transmission spectrum of matrix grains of GRA95229 pressed on diamond window under vacuum heated at 300C
- normalized and baseline-corrected MIR transmission spectrum of matrix grains of GRA95229 pressed on diamond window under vacuum heated at 300C
- normalized and baseline-corrected MIR transmission spectrum of matrix grains of GRA95229 pressed on diamond window under vacuum heated at 300C
- normalized and baseline-corrected MIR transmission spectrum of matrix grains of GRA95229 pressed on diamond window under vacuum heated at 300C
- normalized and baseline-corrected MIR transmission spectrum of matrix grains of GRA95229 pressed on diamond window under vacuum heated at 300C
- Raw MIR absorbance spectrum of EET92042 matrix grain (fragment #1) under vacuum at 300°C
- Raw MIR absorbance spectrum of EET92042 matrix grain (fragment #2) under vacuum at 300°C
- Raw MIR absorbance spectrum of EET92042 matrix grain (fragment #3) under vacuum at 300°C
- Raw MIR absorbance spectrum of EET92042 matrix grain (fragment #4) under vacuum at 300°C
- Raw MIR absorbance spectrum of EET92042 matrix grain (fragment #5) under vacuum at 300°C
- Raw MIR absorbance spectrum of EET92042 matrix grain (fragment #9) under vacuum at 300°C
- Raw MIR absorbance spectrum of EET92042 matrix grain (fragment #11) under vacuum at 300°C
- Normalized and baseline-corrected MIR absorbance spectrum of EET92042 matrix grain (fragment #1) under vacuum at 300°C
- Normalized and baseline-corrected MIR absorbance spectrum of EET92042 matrix grain (fragment #2) under vacuum at 300°C
- Raw MIR absorbance spectrum of Renazzo matrix grain (fragment #1) under vacuum at 300°C
- Raw MIR absorbance spectrum of Renazzo matrix grain (fragment #5) under vacuum at 300°C
- Raw MIR absorbance spectrum of Renazzo matrix grain (fragment #6) under vacuum at 300°C
- Raw MIR absorbance spectrum of Renazzo matrix grain (fragment #7) under vacuum at 300°C
- Raw MIR absorbance spectrum of Renazzo matrix grain (fragment #9) under vacuum at 300°C
- Normalized and baseline-corrected MIR absorbance spectrum of EET92042 matrix grain (fragment #3) under vacuum at 300°C
- Normalized and baseline-corrected MIR absorbance spectrum of EET92042 matrix grain (fragment #4) under vacuum at 300°C
- Normalized and baseline-corrected MIR absorbance spectrum of EET92042 matrix grain (fragment #5) under vacuum at 300°C
- Raw MIR absorbance spectrum of Renazzo matrix grain (fragment #10) under vacuum at 300°C
- Normalized and baseline-corrected MIR absorbance spectrum of Renazzo matrix grain (fragment #1) under vacuum at 300°C
- Normalized and baseline-corrected MIR absorbance spectrum of Renazzo matrix grain (fragment #5) under vacuum at 300°C
- Normalized and baseline-corrected MIR absorbance spectrum of Renazzo matrix grain (fragment #6) under vacuum at 300°C
- Normalized and baseline-corrected MIR absorbance spectrum of Renazzo matrix grain (fragment #7) under vacuum at 300°C
- Normalized and baseline-corrected MIR absorbance spectrum of Renazzo matrix grain (fragment #9) under vacuum at 300°C
- Normalized and baseline-corrected MIR absorbance spectrum of Renazzo matrix grain (fragment #10) under vacuum at 300°C
- raw MIR absorbance spectrum of pressed QUE99177 matrix grain N°1, under vacuum and heated at 300°C
- raw MIR absorbance spectrum of pressed QUE99177 matrix grain N°3, under vacuum and heated at 300°C
- raw MIR absorbance spectrum of pressed QUE99177 matrix grain N°4, under vacuum and heated at 300°C
- raw MIR absorbance spectrum of pressed QUE99177 matrix grain N°5, under vacuum and heated at 300°C
- raw MIR absorbance spectrum of pressed QUE99177 matrix grain N°6, under vacuum and heated at 300°C
- raw MIR absorbance spectrum of pressed QUE99177 matrix grain N°7, under vacuum and heated at 300°C
- raw MIR absorbance spectrum of pressed QUE99177 matrix grain N°8, under vacuum and heated at 300°C
- raw MIR absorbance spectrum of pressed QUE99177 matrix grain N°9, under vacuum and heated at 300°C
- normalized MIR absorbance spectrum of pressed QUE99177 matrix grain N°1, under vacuum and heated at 300°C
- normalized MIR absorbance spectrum of pressed QUE99177 matrix grain N°2, under vacuum and heated at 300°C
- normalized MIR absorbance spectrum of pressed QUE99177 matrix grain N°3, under vacuum and heated at 300°C
- normalized MIR absorbance spectrum of pressed QUE99177 matrix grain N°4, under vacuum and heated at 300°C
- normalized MIR absorbance spectrum of pressed QUE99177 matrix grain N°5, under vacuum and heated at 300°C
- normalized MIR absorbance spectrum of pressed QUE99177 matrix grain N°6, under vacuum and heated at 300°C
- normalized MIR absorbance spectrum of pressed QUE99177 matrix grain N°7, under vacuum and heated at 300°C
- normalized MIR absorbance spectrum of pressed QUE99177 matrix grain N°8, under vacuum and heated at 300°C
- normalized MIR absorbance spectrum of pressed QUE99177 matrix grain N°9, under vacuum and heated at 300°C
- Normalized and baseline-corrected MIR absorbance spectrum of EET92042 matrix grain (fragment #9) under vacuum at 300°C
- Normalized and baseline-corrected MIR absorbance spectrum of EET92042 matrix grain (fragment #11) under vacuum at 300°C
- Publications
-
- Beck et al., 2010, Geochim. Cosmochim. Acta, 74, 4881 - 4892
- Bonal et al., 2006, Geochim. Cosmochim. Acta, 70, 1849 - 1863
- Bonal et al., 2007, Geochim. Cosmochim. Acta, 71, 1605 - 1623
- Bonal et al., 2010, Geochim. Cosmochim. Acta, 74, 6590 - 6609
- Orthous-Daunay et al., 2010, Earth Planet. Sci. Lett., 300, 321 - 328
- Quirico et al., 2003, Meteorit. Planet. Sci., 38, 795 - 811
- Quirico et al., 2005, Planet. Space Sci., 53, 1443 - 1448
- Quirico et al., 2009, Earth Planet. Sci. Lett., 287, 185 - 193
- Raynal et al., 2000, Planet. Space Sci., 48, 1329 - 1339