Login

Join for Free!
116828 members
table of contents table of contents

The discovery of liquid water-related sulfates on Mars is of great astrobiological …


Biology Articles » Astrobiology » UV Shielding Properties of Jarosite Vs. Gypsum: Astrobiological Implications for Mars

Abstract
- UV Shielding Properties of Jarosite Vs. Gypsum: Astrobiological Implications for Mars

UV Shielding Properties of Jarosite Vs. Gypsum: Astrobiological Implications for Mars

1G. Amaral, 2J. Martinez-Frias and 2,3L. Vázquez

1Departamento de Química Física I, Fac. Ciencias Químicas,
Universidad Complutense, 28040 Madrid, Spain

2Centro de Astrobiología (CSIC-INTA), Associated to the NASA Astrobiology Institute,
Ctra de Ajalvir km. 4, 28850 Torrejón de Ardoz, Spain

3Departamento de Matemática Aplicada, Facultad de Informática,
Universidad Complutense de Madrid, 28040 Madrid, Spain

World Applied Sciences Journal 2 (2): 112-116, 2007.

 

Abstract:

The discovery of liquid water-related sulfates on Mars is of great astrobiological interest. UV radiation experiments, using natural Ca and Fe sulfates (gypsum, jarosite), demonstrate a large difference in the UV protection capabilities of both minerals and also confirm that the mineralogical composition of the Martian regolith is a crucial shielding factor. It is demonstrated that a thin (500 μm-thick) sample of jarosite prevents UV transmission, providing suitable niches for life exploration.

Key words: UV shielding, Mars, jarosite, gypsum, astrobiology

 


rating: 6.56 from 9 votes | updated on: 25 Oct 2008 | views: 6850 |

Rate article:







excellent!bad…