| Participant of COCARDE Network |
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Research Field Field geology, stratigraphy and sedimentology, and geobiology of African Paleozoic and Pre-Paleozoic hydrocarbon-seep dominate carbonate environments, and their application for planetary field analogues (remote sensing and planetary geology).
Investigation sites: northern and southern Africa.
Hydrocarbon, cold seep deposits are characterized by authigenic, microbially-induced carbonates with 13C-depleted values, commonly cementing shelled biota. The characteristics and evolution of recent and fossil seep settings are well defined, as well as the criteria for their recognition in the geologic record. However, if hydrocarbon seeps are well known in geologic setting, they are rarely recorded in Palaeozoic and Precambrian strata and the reasons remain unclear. The focus of our research is to localize and investigate potential fossil seep systems and related signatures and biosignatures in the Palaeozoic and Precambrian record in Africa using a comparative analyses and geomicrobiological approaches.
This research aims also at comparing geological features, morphologies and processes linked to methane-bearing fluid flow at multiple scales on Mars and Earth. The value of hydrocarbon deposits and mounds as a Mars analogue is highlighted by convincing (microscopic) evidence of life to fluid escape features that can guide exploration for life on Mars.
Collaborations:
Recent and on-going projects
Facilities We benefits from the facilities of the Geology Department and Spectrau-The Central Analytical Facility of the Faculty of Science at the University of Johannesburg:
More detailed infos:
People:
Related publications 2012 Cavalazzi B, Barbieri R, Cady SL, George A.D., Gennaro S Lui A, Westall F, Rossi AP, Ori GG, TajHeddine K, IN PRESS. Iron-framboids in the hydrocarbon-related Middle Devonian Hollard Mound of the Anti-Atlas mountain range in Morocco: Evidence of potential microbial biosignatures. Sedimentary Geology. Online since 16 September 2011. Danise S, Cavalazzi B, Dominici S, Westall F, Monechi S, Giuoli S, IN PRESS. Evidence of microbial activity in a Miocene whale carcass from shallow water sediments (Voghera, Northern Italy). Palaeogeography, Palaeoclimatology, Palaeoecology. Online since 9 December 2011. 2008 Barbieri R, Cavalazzi B, 2008. Fossil microorganisms at methane seeps: an astrobiological perspective. In Seckbach, J. and Walsh, M. (Eds), From Fossils to Astrobiology. Records of Life on Earth and the Search for Extraterrestrial Biosignatures, Springer, New York, pp. 297-317. 2007 Cavalazzi B, 2007. Chemotrophic filamentous microfossils from the Hollard Mound (Devonian, Morocco) as investigated by focused ion beam. Astrobiology 7, 402-415. Cavalazzi B, Barbieri R, Ori GG, 2007. Chemosynthetic microbialites in the Devonian carbonate mounds of the Hamar Laghdad (Anti-Atlas, Morocco). Sedimentary Geology 200, 73-88. Cavalazzi B, 2007. Fossil microbial evidences from Miocene Roccapalumba (Central Sicily, Italy) methane-seep carbonates. Grzybowski Foundation 12, 7-13. 2006 Cavalazzi B, Barbieri R, 2006. Fossil prokaryotes of cold-seep carbonates. CIESM Monograph 29, 123-132. 2005 Barbieri R, Cavalazzi B, 2005. Microbial fabrics from Neogene cold seep carbonates, Northern Apennine, Italy. Palaeogeography, Palaeoclimatology, Palaeoecology, 227, 143-155. 2004 Barbieri R, Ori GG, Cavalazzi B, 2004. A Silurian cold seep ecosystem from Middle Atlas, Morocco. Palaios, 19, 527-542. Barbieri R, Cavalazzi B, 2004. Astrobiological implications of microbial morphologies in cold fluid-generated carbonates. Advancefs in Space Research, 33, 1262-1267. |
