SEDIMENTARY ROCKS AT MERIDIANI PLANUM: ORIGIN, DIAGENESIS, AND IMPLICATIONS FOR LIFE ON MARS
- DSpace Home
- →
- Геология России
- →
- ELibrary
- →
- View Item
JavaScript is disabled for your browser. Some features of this site may not work without it.
dc.contributor.author | Squyres S.W. | |
dc.contributor.author | Knoll A.H. | |
dc.date.accessioned | 2023-11-26T02:22:40Z | |
dc.date.available | 2023-11-26T02:22:40Z | |
dc.date.issued | 2005 | |
dc.identifier | https://www.elibrary.ru/item.asp?id=14581391 | |
dc.identifier.citation | Earth and Planetary Science Letters, 2005, 240, 1, 1-10 | |
dc.identifier.issn | 0012-821X | |
dc.identifier.uri | https://repository.geologyscience.ru/handle/123456789/41999 | |
dc.description.abstract | The MER rover Opportunity has carried out the first outcrop-scale investigation of ancient sedimentary rocks on Mars. The rocks, exposed in craters and along fissures in Meridiani Planum, are sandstones formed via the erosion and re-deposition of fine grained siliciclastics and evaporites derived from the chemical weathering of olivine basalts by acidic waters. A stratigraphic section more than seven meters thick measured in Endurance crater is dominated by eolian dune and sand sheet facies; the uppermost half meter, however, exhibits festoon cross lamination at a length scale that indicates subaqueous deposition, likely in a playa-like interdune setting. Silicates and sulfate minerals dominate outcrop geochemistry, but hematite and Fe3D3 (another ferric iron phase) make up as much as 11% of the rocks by weight. Jarosite in the outcrop matrix indicates precipitation at low pH. Cements, hematitic concretions, and crystal molds attest to a complex history of early diagenesis, mediated by ambient ground waters. The depositional and early diagenetic paleoenvironment at Meridiani was arid, acidic, and oxidizing, a characterization that places strong constraints on astrobiologial inference. | |
dc.title | SEDIMENTARY ROCKS AT MERIDIANI PLANUM: ORIGIN, DIAGENESIS, AND IMPLICATIONS FOR LIFE ON MARS | |
dc.type | Статья | |
dc.identifier.doi | 10.1016/j.epsl.2005.09.038 |
Files in this item
This item appears in the following Collection(s)
-
ELibrary
Метаданные публикаций с сайта https://www.elibrary.ru