Abstract:
:Rover missions to the rocky bodies of the Solar System and especially to Mars require lightweight, portable instruments that use minimal power, require no sample preparation, and provide suitably diagnostic mineralogical information to an Earth-based exploration team. Short-wave infrared (SWIR) spectroscopic instruments such as the Portable Infrared Mineral Analyser (PIMA, Integrated Spectronics Pty Ltd., Baulkham Hills, NSW, Australia) fulfill all these requirements. We describe an investigation of a possible Mars analogue site using a PIMA instrument. A survey was carried out on the Strelley Pool Chert, an outcrop of stromatolitic, silicified Archean carbonate and clastic succession in the Pilbara Craton, interpreted as being modified by hydrothermal processes. The results of this study demonstrate the capability of SWIR techniques to add significantly to the geological interpretation of such hydrothermally altered outcrops. Minerals identified include dolomite, white micas such as illite-muscovite, and chlorite. In addition, the detection of pyrophyllite in a bleached and altered unit directly beneath the succession suggests acidic, sulfur-rich hydrothermal activity may have interacted with the silicified sediments of the Strelley Pool Chert.
journal_name
Astrobiologyjournal_title
Astrobiologyauthors
Brown A,Walter M,Cudahy Tdoi
10.1089/ast.2004.4.359keywords:
subject
Has Abstractpub_date
2004-10-01 00:00:00pages
359-76issue
3eissn
1531-1074issn
1557-8070journal_volume
4pub_type
杂志文章相关文献
ASTROBIOLOGY文献大全abstract:UNLABELLED:In this paper, percolation theory is employed to place tentative bounds on the probability p of interstellar travel and the emergence of a civilization (or panspermia) that colonizes the entire Galaxy. The ensuing ramifications with regard to the Fermi paradox are also explored. In particular, it is suggeste...
journal_title:Astrobiology
pub_type: 杂志文章
doi:10.1089/ast.2015.1411
更新日期:2016-06-01 00:00:00
abstract::A continuing challenge for scientists is to keep K-12 teachers informed about new scientific developments. Over the past few years, this challenge has increased as new research findings have come from the field of astrobiology. In addition to trying to keep abreast of these new discoveries, K-12 teachers must also fac...
journal_title:Astrobiology
pub_type: 杂志文章
doi:10.1089/15311070260192282
更新日期:2002-07-01 00:00:00
abstract::Chloride-bearing deposits and phyllosilicates-bearing units are widely distributed in the southern highlands of Mars, but these phases are rarely found together in fluviolacustrine environments. The study of the coexistence of these minerals can provide important insights into geochemistry, water activity, and ultimat...
journal_title:Astrobiology
pub_type: 杂志文章
doi:10.1089/ast.2017.1757
更新日期:2018-08-01 00:00:00
abstract::The EPOXI Discovery Mission of Opportunity reused the Deep Impact flyby spacecraft to obtain spatially and temporally resolved visible photometric and moderate resolution near-infrared (NIR) spectroscopic observations of Earth. These remote observations provide a rigorous validation of whole-disk Earth model simulatio...
journal_title:Astrobiology
pub_type: 杂志文章
doi:10.1089/ast.2011.0642
更新日期:2011-06-01 00:00:00
abstract::The cloud layer has been hypothesized to be the most habitable region of Venus. In the lower clouds, both temperature and pressure fall within bounds that support reproduction of microbial life on Earth, although the water activity of the sulfuric acid cloud droplets makes the clouds uninhabitable to known life. In th...
journal_title:Astrobiology
pub_type: 杂志文章
doi:10.1089/ast.2020.2280
更新日期:2021-01-19 00:00:00
abstract::The discovery by NASA's Cassini mission at Saturn in 2005 of a large plume of material erupting from the south polar terrain of Enceladus, sourced within a subsurface ocean of salty liquid water laced with organic compounds, has brought together scientists from a diverse range of disciplines over the last decade to ev...
journal_title:Astrobiology
pub_type: 杂志文章
doi:10.1089/ast.2017.1711
更新日期:2017-09-01 00:00:00
abstract::There is concern in many developed countries that school students are turning away from science. However, students may be choosing not to study science and dismissing the possibility of a scientific career because, in the junior secondary years, they gain a false view of science and the work of scientists. There is a ...
journal_title:Astrobiology
pub_type: 杂志文章,评审
doi:10.1089/ast.2012.0873
更新日期:2012-12-01 00:00:00
abstract::Microbialites can have complex morphologies that preserve clues to ancient microbial ecology. However, extracting and interpreting these clues is challenging due to both the complexity of microbial structures and the difficulties of connecting morphology to microbial processes. Fenestrate microbialites from the 2521±3...
journal_title:Astrobiology
pub_type: 杂志文章
doi:10.1089/ast.2010.0560
更新日期:2011-07-01 00:00:00
abstract::We critically investigate some evolutionary aspects of the famous Drake equation, which is usually presented as the central guide for research on extraterrestrial intelligence. It is shown that the Drake equation tacitly relies on unverified assumptions on both the physicochemical history of our galaxy and the propert...
journal_title:Astrobiology
pub_type: 杂志文章
doi:10.1089/153110704323175160
更新日期:2004-07-01 00:00:00
abstract::Recent measurements of methane (CH4) by the Mars Science Laboratory (MSL) now confront us with robust data that demand interpretation. Thus far, the MSL data have revealed a baseline level of CH4 (∼0.4 parts per billion by volume [ppbv]), with seasonal variations, as well as greatly enhanced spikes of CH4 with peak ab...
journal_title:Astrobiology
pub_type: 杂志文章,评审
doi:10.1089/ast.2018.1917
更新日期:2018-10-01 00:00:00
abstract::Ultraviolet (UV) irradiation on the surface of Mars is an important factor that affects the survivability of microorganisms on Mars. The possibility of martian brines made from Fe2(SO4)3, MnSO4, and MgSO4 salts providing a habitable niche on Mars via attenuation of UV radiation was investigated on the bacteria Bacillu...
journal_title:Astrobiology
pub_type: 杂志文章
doi:10.1089/ast.2020.2285
更新日期:2020-11-25 00:00:00
abstract::The Hayabusa2 mission successfully collected samples from the asteroid Ryugu last year and will return these to Earth in December 2020. It is anticipated that the samples will enable the analysis of terrestrially uncontaminated organic matter and minerals. Such analyses are in turn expected to elucidate the evolution ...
journal_title:Astrobiology
pub_type: 杂志文章
doi:10.1089/ast.2019.2198
更新日期:2020-07-01 00:00:00
abstract::Raman spectroscopy can provide chemical information about organic and inorganic substances quickly and nondestructively with little to no sample preparation, thus making it an ideal instrument for Mars rover missions. The ESA ExoMars planetary mission scheduled for launch in 2018 will contain a miniaturized Raman spec...
journal_title:Astrobiology
pub_type: 杂志文章
doi:10.1089/ast.2015.1334
更新日期:2015-09-01 00:00:00
abstract::As photosynthesis on Earth produces the primary signatures of life that can be detected astronomically at the global scale, a strong focus of the search for extrasolar life will be photosynthesis, particularly photosynthesis that has evolved with a different parent star. We take previously simulated planetary atmosphe...
journal_title:Astrobiology
pub_type: 杂志文章,评审
doi:10.1089/ast.2006.0108
更新日期:2007-02-01 00:00:00
abstract::Remote sensing data are abundant, whereas surface in situ verification of atmospheric conditions is rare on Mars. Earth-based analogs could help gain an understanding of soil and atmospheric processes on Mars and refine existing models. In this work, we evaluate the applicability of the Weather Research and Forecastin...
journal_title:Astrobiology
pub_type: 杂志文章
doi:10.1089/ast.2019.2024
更新日期:2020-06-01 00:00:00
abstract::In June 2003, the geochemical composition of geothermal fluids was determined at 9 sites in the Vulcano hydrothermal system, including sediment seeps, geothermal wells, and submarine vents. Compositional data were combined with standard state reaction properties to determine the overall Gibbs free energy (DeltaG(r) ) ...
journal_title:Astrobiology
pub_type: 杂志文章
doi:10.1089/ast.2007.0128
更新日期:2007-12-01 00:00:00
abstract::Modern ecological niches are teeming with an astonishing diversity of microbial life in biofilms closely associated with mineral surfaces, which highlights the remarkable success of microorganisms in conquering the challenges and capitalizing on the benefits presented by the mineral-water interface. Biofilm formation ...
journal_title:Astrobiology
pub_type: 杂志文章
doi:10.1089/ast.2011.0776
更新日期:2012-08-01 00:00:00
abstract::We observed 20-200 m sized low-albedo seepage-like streaks and their annual change on defrosting polar dunes in the southern hemisphere of Mars, based on the Mars Orbiter Camera (MOC), High Resolution Stereo Camera (HRSC), and High Resolution Imaging Science Experiment (HiRISE) images. The structures originate from da...
journal_title:Astrobiology
pub_type: 杂志文章
doi:10.1089/ast.2007.0212
更新日期:2009-01-01 00:00:00
abstract:UNLABELLED:Permafrost-affected soils are characterized by a high abundance and diversity of methanogenic communities, which are considered suitable model organisms for potential life on Mars. Methanogens from Siberian permafrost have been proven to be highly resistant against divers stress conditions such as subzero te...
journal_title:Astrobiology
pub_type: 杂志文章
doi:10.1089/ast.2015.1319
更新日期:2015-11-01 00:00:00
abstract::Laser-Raman imagery is a non-intrusive, non-destructive analytical technique, recently introduced to Precambrian paleobiology, that can be used to demonstrate a one-to-one spatial correlation between the optically discernible morphology and kerogenous composition of permineralized fossil microorganisms. Made possible ...
journal_title:Astrobiology
pub_type: 杂志文章
doi:10.1089/ast.2005.5.333
更新日期:2005-06-01 00:00:00
abstract::Materials blasted into space from the surface of early Earth may preserve a unique record of our planet's early surface environment. Armstrong et al. (2002) pointed out that such materials, in the form of terrestrial meteorites, may exist on the Moon and be of considerable astrobiological interest if biomarkers from e...
journal_title:Astrobiology
pub_type: 杂志文章
doi:10.1089/ast.2007.0215
更新日期:2008-04-01 00:00:00
abstract::The thermal springs Trollosen and Fisosen, located on the High Arctic archipelago Svalbard, discharge saline groundwaters rich in hydrogen sulfide and ammonium through a thick layer of permafrost. Large amounts of biomass that consist of filamentous microorganisms containing sulfur granules, as analyzed with energy di...
journal_title:Astrobiology
pub_type: 杂志文章
doi:10.1089/ast.2010.0551
更新日期:2011-09-01 00:00:00
abstract::The Atacama Desert has long been considered a good Mars analogue for testing instrumentation for planetary exploration, but very few data (if any) have been reported about the geomicrobiology of its salt-rich subsurface. We performed a Mars analogue drilling campaign next to the Salar Grande (Atacama, Chile) in July 2...
journal_title:Astrobiology
pub_type: 杂志文章
doi:10.1089/ast.2011.0654
更新日期:2011-12-01 00:00:00
abstract::Antarctic subglacial lakes are often considered suitable analogues to extraterrestrial subglacial aqueous environments. Recently, an environmentally friendly RECoverable Autonomous Sonde (RECAS) was designed at the Polar Research Center of Jilin University (JLU) to sample the water of subglacial lakes without contamin...
journal_title:Astrobiology
pub_type: 杂志文章
doi:10.1089/ast.2019.2103
更新日期:2020-01-01 00:00:00
abstract::The order of magnitude of increased growth, multiplication rate, and decreased sporulation of Bacillus subtilis after exposure to nanotesla magnetic fields (MFs) relative to control samples were observed experimentally. Earth's total magnetic field intensity was reduced from 47.9 ± 0.4 μT to cover the range from 97.5 ...
journal_title:Astrobiology
pub_type: 杂志文章
doi:10.1089/ast.2020.2288
更新日期:2020-12-23 00:00:00
abstract::Bacterial endospores in the genus Bacillus are considered good models for studying interplanetary transfer of microbes by natural or human processes. Although spore survival during transfer itself has been the subject of considerable study, the fate of spores in extraterrestrial environments has received less attentio...
journal_title:Astrobiology
pub_type: 杂志文章
doi:10.1089/ast.2005.5.536
更新日期:2005-08-01 00:00:00
abstract:UNLABELLED:Fluid inclusions trapped in ancient halite can contain a community of halophilic prokaryotes and eukaryotes that inhabited the surface brines from which the halite formed. Long-term survival of bacteria and archaea and preservation of DNA have been reported from halite, but little is known about the distribu...
journal_title:Astrobiology
pub_type: 杂志文章
doi:10.1089/ast.2015.1397
更新日期:2016-06-01 00:00:00
abstract::The five major mass extinctions identified in 1982 by Raup and Sepkoski have expanded to six, with the suggestion that the Permian-Triassic extinction was a double event. Is there a general explanation for great mass extinctions, or can they result from different triggers, or even from internal system instabilities? T...
journal_title:Astrobiology
pub_type: 杂志文章
doi:10.1089/153110703321632480
更新日期:2003-04-01 00:00:00
abstract::Following the suggestion that nucleoside analogues having their nucleobases joined to ribose via a carbon-carbon bond might easily arise prebiotically, the glycosylation of uracil carrying electron-donating substituents (Me, OH, OCH3, NH2) at its 5 or 6 positions was investigated. Of these, only 6-aminouracil gave gly...
journal_title:Astrobiology
pub_type: 杂志文章
doi:10.1089/ast.2014.1264
更新日期:2015-04-01 00:00:00
abstract::Nitrogen is the major component of Earth's atmosphere and plays important roles in biochemistry. Biological systems have evolved a variety of mechanisms for fixing and recycling environmental nitrogen sources, which links them tightly with terrestrial nitrogen reservoirs. However, prior to the emergence of biology, al...
journal_title:Astrobiology
pub_type: 杂志文章
doi:10.1089/ast.2017.1700
更新日期:2018-07-01 00:00:00