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NanoSIMS analysis of organic carbon from the Tissint Martian meteorite: Evidence for the past existence of subsurface organic‐bearing fluids on Mars
| Content Provider | Semantic Scholar |
|---|---|
| Author | Lin, Yangting Goresy, Ahmed El Zhang, Jianchao Gillet, Philippe Xu, Yichun Hao, Jialong Miyahara, Masaaki Ouyang, Ziyuan Ohtani, Eiji Yang, Wei Feng, Lu Zhao, Xuchao Yang, Jing Ozawa, Shin |
| Copyright Year | 2014 |
| Abstract | Two petrographic settings of carbonaceous components, mainly filling open fractures and occasionally enclosed in shock-melt veins, were found in the recently fallen Tissint Martian meteorite. The presence in shock-melt veins and the deuterium enrichments (delta D up to +1183 parts per thousand) of these components clearly indicate a pristine Martian origin. The carbonaceous components are kerogen-like, based on micro-Raman spectra and multielemental ratios, and were probably deposited from fluids in shock-induced fractures in the parent rock of Tissint. After precipitation of the organic matter, the rock experienced another severe shock event, producing the melt veins that encapsulated a part of the organic matter. The C isotopic compositions of the organic matter (delta C-13 = -12.8 to -33.1 parts per thousand) are significantly lighter than Martian atmospheric CO2 and carbonate, providing a tantalizing hint for a possible biotic process. Alternatively, the organic matter could be derived from carbonaceous chondrites, as insoluble organic matter from the latter has similar chemical and isotopic compositions. The presence of organic-rich fluids that infiltrated rocks near the surface of Mars has significant implications for the study of Martian paleoenvironment and perhaps to search for possible ancient biological activities on Mars. |
| Starting Page | 2201 |
| Ending Page | 2218 |
| Page Count | 18 |
| File Format | PDF HTM / HTML |
| DOI | 10.1111/maps.12389 |
| Volume Number | 49 |
| Alternate Webpage(s) | https://documents.epfl.ch/groups/e/ep/epflmedia/www/20141201_Tissint/Tissint_FullTextArticle.pdf |
| Alternate Webpage(s) | https://doi.org/10.1111/maps.12389 |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
