Abstract
A carbonaceous chondrite was recovered immediately after the fall near the village of Diepenveen in the Netherlands on October 27, 1873, but came to light only in 2012. Analysis of sodium and poly-aromatic hydrocarbon content suggests little contamination from handling. Diepenveen is a regolith breccia with an overall petrology consistent with a CM classification. Unlike most other CM chondrites, the bulk oxygen isotopes are extremely 16O rich, apparently dominated by the signature of anhydrous minerals, distributed on a steep slope pointing to the domain of intrinsic CM water. A small subset plots closer to the normal CM regime, on a parallel line 2 ‰ lower in δ17O. Different lithologies in Diepenveen experienced varying levels of aqueous alteration processing, being less aqueously altered at places rather than more heated. The presence of an agglutinate grain and the properties of methanol-soluble organic compounds point to active impact processing of some of the clasts. Diepenveen belongs to a CM clan with ~5 Ma CRE age, longer than most other CM chondrites, and has a relatively young K-Ar resetting age of ~1.5 Ga. As a CM chondrite, Diepenveen may be representative of samples soon to be returned from the surface of asteroid (162173) Ryugu by the Hayabusa2 spacecraft.
| Original language | English |
|---|---|
| Pages (from-to) | 1431-1461 |
| Number of pages | 31 |
| Journal | Meteoritics and Planetary Science |
| Volume | 54 |
| Issue number | 7 |
| Early online date | 13 May 2019 |
| DOIs | |
| Publication status | Published - Jul 2019 |
Funding
We are very grateful to the last owner, Mrs. Leida Kiers, for donating the meteorite to the Dutch state collections curated by Naturalis in Leiden in October 2013. We thank Rhian Jones and Adrian Brearley for facilitating the sample distribution. S. J. d. V. thanks Ruben Abellon for support with the spectral measurements at TU Delft. M. L. was a guest researcher at the VU Department of Earth Sciences during part of this research. L. M. K. acknowledges the thorough analytical work by Hans de Groot and Eric Buter of Naturalis, as well as that by Tilly Bouten using the National Geological Facility electron microscope funded by a FES grant to Naturalis and a NWO large investment grant to Utrecht University. W. v. W. acknowledges financial support of the Netherlands Organization for Scientific Research and the Netherlands Space Office. M. M. M. M. is supported by grants from the Swiss National Science Foundation. A. S. B., D. P. G., and J. P. D. were supported?by the NASA Astrobiology Institute and the Goddard Center for Astrobiology, and a grant from the Simons Foundation (SCOL award 302497 to J. P. D.), as well as by NASA's Planetary Science Research Program. The work was supported in part also by NASA grants NNX14AM62G and NNX16AD34G (Q.-Z. Y.), and by NASA grants NNX14AR92G and 80NSSC18K08 (P. J.).
| Funders | Funder number |
|---|---|
| Goddard Center for Astrobiology | |
| NASA's Planetary Science Research Program | |
| NASA’s Planetary Science Research Program | |
| NWO large investment | |
| National Geological Facility | |
| Netherlands Organization for Scientific Research | |
| SCOL | |
| VU Department of Earth Sciences | |
| National Aeronautics and Space Administration | 80NSSC18K08, NNX14AM62G, NNX16AD34G, NNX14AR92G |
| Simons Foundation | 302497 |
| Goddard Space Flight Center | |
| Fusion Energy Sciences | |
| NASA Astrobiology Institute | |
| Schweizerischer Nationalfonds zur Förderung der Wissenschaftlichen Forschung | 154874 |
| Universiteit Utrecht | |
| Technische Universiteit Delft | |
| Netherlands Space Office | |
| Nederlandse Organisatie voor Wetenschappelijk Onderzoek |
