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Geomarkers versus Biomarkers: Paleoenvironmental and Astrobiological Significance
Ist Teil von
Ambio, 2007-07, Vol.36 (5), p.425-426
Ort / Verlag
Sweden: Royal Swedish Academy of Sciences
Erscheinungsjahr
2007
Quelle
MEDLINE
Beschreibungen/Notizen
The specific works in which the term geomarker are particularly quoted deal with: i the use of benzohopanes as geomarkers of sediments and petroleums (14); ii the characterization of oil shales, using the alkane geomarkers as indicators of the immature character of sediments and the nature and environmental features of the source (15); iii the utilization of spectroscopic techniques (Raman spectroscopy) for planetary exploration in the near future to search for extinct or extant life signals (16); iv the use of some minerals (graphite) to carry out paleogeographic reconstractions (17, 18); and v the use of mineralogical textures, crystal-chemical features and isotopic values as geomarkers in methanogenic and hydro thermal chimneys (19, 20).