Affiliation: University of Aberdeen
- Long term geological record of a global deep subsurface microbial habitat in sand injection complexesJohn Parnell
School of Geosciences, University of Aberdeen, Aberdeen AB24 3UE, United Kingdom
Sci Rep 3:1828. 2013..The measured examples of iron sulphide in injected sands extend back to the Proterozoic, and show that injected sand complexes have been a long-term environment for deep subsurface microbial colonization...
- Ordovician ash geochemistry and the establishment of land plantsJohn Parnell
School of Geosciences, University of Aberdeen, Aberdeen, AB24 3UE, UK
Geochem Trans 13:7. 2012..In particular, high phosphorus levels in ash were favourable to plant growth. This may have allowed photosynthesizers to diversify and enlarge, and transform the surface of the planet...
- A demonstration of an affinity between pyrite and organic matter in a hydrothermal settingPaula Lindgren
Department of Geographical and Earth Sciences, University of Glasgow, Glasgow G12 8QQ, UK
Geochem Trans 12:3. 2011..This study points to an example from a hydrothermal setting in the geological record, demonstrating that pyrite can have a high potential for the concentration and accumulation of organic materials...
- Early oxygenation of the terrestrial environment during the MesoproterozoicJohn Parnell
School of Geosciences, University of Aberdeen, Aberdeen AB24 3UE, UK
Nature 468:290-3. 2010....
- Fluid inclusion studies of chemosynthetic carbonates: strategy for seeking life on MarsJohn Parnell
Department of Geology and Petroleum Geology, University of Aberdeen King s College, Aberdeen AB24 3UE, U K
Astrobiology 2:43-57. 2002..The crushing of bulk samples could release inclusion waters for analysis, which could be undertaken in situ on Mars...
- Searching for life on Mars: selection of molecular targets for ESA's aurora ExoMars missionJohn Parnell
Department of Geology and Petroleum Geology, University of Aberdeen, Aberdeen, United Kingdom
Astrobiology 7:578-604. 2007..Analyzing regolith samples will allow for the search of both extant and fossil biomarkers, but sequential extraction would be required to optimize the analysis of each of these in turn...
- Mineral radioactivity in sands as a mechanism for fixation of organic carbon on the early EarthJohn Parnell
Department of Geology and Petroleum Geology, University of Aberdeen, Aberdeen AB24 3UE, UK
Orig Life Evol Biosph 34:533-47. 2004..The organic accretion process could have occurred at the surface or in the sub-surface, and is independent of a terrestrial or extraterrestrial source for the carbon...
- The use of surface-enhanced Raman scattering for detecting molecular evidence of life in rocks, sediments, and sedimentary depositsStephen A Bowden
Department of Geology and Petroleum Geology, Kings College, University of Aberdeen, Aberdeen, UK
Astrobiology 10:629-41. 2010....
- Identification of morphological biosignatures in Martian analogue field specimens using in situ planetary instrumentationDerek Pullan
Space Research Centre, Department of Physics and Astronomy, University of Leicester, Leicester, UK
Astrobiology 8:119-56. 2008....
- Raman spectroscopic analysis of cyanobacterial gypsum halotrophs and relevance for sulfate deposits on MarsHowell G M Edwards
Chemical and Forensic Sciences, School of Pharmacy, University of Bradford, Bradford BD7 1DP, UK
Analyst 130:917-23. 2005....