Encyclopedia of Astrobiology

Living Edition
| Editors: Muriel Gargaud, William M. Irvine, Ricardo Amils, Henderson James Cleaves, Daniele Pinti, José Cernicharo Quintanilla, Michel Viso

Archean Drilling Projects

  • Nicholas Arndt
Living reference work entry
DOI: https://doi.org/10.1007/978-3-642-27833-4_102-5

Definition

There are several scientific drilling programs that have been carried out in Archean terrains in the past decade and others that are planned in the near future. The aim of most of these drilling projects is to recover relatively well-preserved rock samples from below the present weathering profile and to obtain continuous rock cores that retain soft or friable units that outcrop poorly at the surface. Astrobiology-related studies such as search of pristine morphological or chemical traces of early life form an important part of these projects.

Overview

To date, both volcanic and sedimentary sequences have been targeted, and the recovered cores have been analyzed to investigate conditions at the surface of the Archean Earth – the composition, temperature, and redox state of the Archean ocean and atmosphere and the volcanic and sedimentary processes that operated early in Earth history – and, above all, to search for evidence of primitive life. The focus has been the Pilbara...

Keywords

Foreign Agency Drill Project Tuffaceous Sandstone Northern Cape Province Pilbara Craton 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.
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Copyright information

© Springer-Verlag Berlin Heidelberg 2014

Authors and Affiliations

  1. 1.Maison des GéosciencesLGCA, Université J. FourierSt-Martin d’HèresFrance