Knowledge Resource Center for Ecological Environment in Arid Area
DOI | 10.1002/jgrg.20059 |
Molecular preservation in halite- and perchlorate-rich hypersaline subsurface deposits in the Salar Grande basin (Atacama Desert, Chile): Implications for the search for molecular biomarkers on Mars | |
Fernandez-Remolar, D. C.1; Chong-Diaz, G.2; Ruiz-Bermejo, M.1; Harir, M.3; Schmitt-Kopplin, P.3,4; Tziotis, D.3; Gomez-Ortiz, D.5; Garcia-Villadangos, M.1; Martin-Redondo, M. P.1; Gomez, F.1; Rodriguez-Manfredi, J. A.1; Moreno-Paz, M.1; De Diego-Castilla, G.1; Echeverria, A.6; Urtuvia, V. N.6; Blanco, Y.1; Rivas, L.1; Izawa, M. R. M.7; Banerjee, N. R.7; Demergasso, C.6; Parro, V.1 | |
通讯作者 | Fernandez-Remolar, D. C. |
来源期刊 | JOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES
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ISSN | 2169-8953 |
EISSN | 2169-8961 |
出版年 | 2013 |
卷号 | 118期号:2页码:922-939 |
英文摘要 | Similarities between the Atacama Desert (Chile) and Mars include extreme aridity, highly oxidizing chemistry, and intense ultraviolet radiation that promoted the photochemical production of perchlorates and nitrates. Concentration of these ions under hyperarid conditions led to the formation of nitrate- and perchlorate-bearing deposits in ephemeral lakes, followed by later deposition of chlorides and sulfates. At some locations, such as the Salar Grande, hypersaline deposits have remained unaltered for millions of years. We conducted a drilling campaign in deposits of the Salar to characterize the preservation state of biological molecules. A 5m deep discontinuous core was recovered and subjected to multitechnique analysis including the antibody microarray-based biosensor LDChip300 and the SOLID (Signs Of Life Detector) instrument, complemented by geophysical, mineralogical, geochemical, and molecular analysis. We identified two units based on the mineralogy: the upper one, from the surface to similar to 320cm depth characterized by a predominance of halite and anhydrite, and the lower one, from 320 to 520cm, with a drop in halite and anhydrite and an enrichment in nitrate and perchlorate. Organic compounds including biomolecules were detected in association with the different depositional and mineralogical units, demonstrating the high capacity for molecular preservation. Hypersaline environments preserve biomolecules over geologically significant timescales; therefore, salt-bearing materials should be high-priority targets for the search for evidence of life on Mars. |
英文关键词 | preservation Atacama Desert Mars analog Astrobiology |
类型 | Article |
语种 | 英语 |
国家 | Spain ; Chile ; Germany ; Canada |
收录类别 | SCI-E |
WOS记录号 | WOS:000324913100040 |
WOS关键词 | DISSOLVED ORGANIC-MATTER ; HALOPHILIC MICROORGANISMS ; LIFE ; WATER ; CHEMISTRY ; EVOLUTION ; RECORD ; SALTS ; SOIL |
WOS类目 | Environmental Sciences ; Geosciences, Multidisciplinary |
WOS研究方向 | Environmental Sciences & Ecology ; Geology |
资源类型 | 期刊论文 |
条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/178428 |
作者单位 | 1.Ctr Astrobiol INTA CSIC, Torrejon De Ardoz, Spain; 2.Univ Catolica Norte, Dept Geol Sci, Antofagasta, Chile; 3.Helmholtz Ctr Munich, German Res Ctr Environm Hlth, Neuherberg, Germany; 4.Tech Univ Muenchen, Lehrstuhl Chem Tech Anal & Chem Lebensmitteltechn, Freising Weihenstephan, Germany; 5.Univ Rey Juan Carlos, ESCET, Area Geol, Mostoles, Spain; 6.Univ Catolica Norte, Ctr Biotecnol, Antofagasta, Chile; 7.Univ Western Ontario, Dept Earth Sci, London, ON, Canada |
推荐引用方式 GB/T 7714 | Fernandez-Remolar, D. C.,Chong-Diaz, G.,Ruiz-Bermejo, M.,et al. Molecular preservation in halite- and perchlorate-rich hypersaline subsurface deposits in the Salar Grande basin (Atacama Desert, Chile): Implications for the search for molecular biomarkers on Mars[J],2013,118(2):922-939. |
APA | Fernandez-Remolar, D. C..,Chong-Diaz, G..,Ruiz-Bermejo, M..,Harir, M..,Schmitt-Kopplin, P..,...&Parro, V..(2013).Molecular preservation in halite- and perchlorate-rich hypersaline subsurface deposits in the Salar Grande basin (Atacama Desert, Chile): Implications for the search for molecular biomarkers on Mars.JOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES,118(2),922-939. |
MLA | Fernandez-Remolar, D. C.,et al."Molecular preservation in halite- and perchlorate-rich hypersaline subsurface deposits in the Salar Grande basin (Atacama Desert, Chile): Implications for the search for molecular biomarkers on Mars".JOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES 118.2(2013):922-939. |
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