Isotopic signatures of extinct low-temperature hydrothermal chimneys in the Jaroso Mars analog

Details Isotopic signatures of extinct low-temperature hydrothermal chimneys in the Jaroso Mars analog Isotopic signatures of extinct low-temperature hydrothermal chimneys in the Jaroso Mars analog

Mar 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007p%26ss...55..441m&link_type=abstract

Planetary and Space Science, Volume 55, Issue 4, p. 441-448.

Mathematics

Logic

1

Scientific paper

The present work presents a geochemical study, focused on the oxygen and carbon isotopic signatures of shallow-marine, carbonate extinct chimneys, from Jaroso Hydrothermal System (JHS). In each chimney a meticulous sampling from the central orifice to the outer rim of the structure was performed. The isotopic geochemistry study allowed to establish the origin and evolution of the fluids during the formation of the vent structures. The negative δ13C values indicate a source of meteoric water for the Fe-rich fluids. More positive δ13C values are present in ankerite and in some calcite, both related with marine water. δ18O in ankerite indicates low-temperature hydrothermal conditions, while in calcite is showing either primary signatures or early diagenesis at low temperature. On the contrary, calcite displaying more negative δ13C and δ18O values represents a late mineral phase which was formed under meteoric diagenesis. Each chimney resulted from the precipitation of intergranular carbonate cement around a channellized flux of metal-rich fluid crossing a shallow-marine, unconsolidated, sandy-marl substrate. The paleoenvironmental interpretation carried out from the isotopic data emphasizes the importance of the stable isotopes as fluid geomarkers, also advancing in the understanding of an interesting analog for the geological and astrobiological exploration of Mars.

Affiliated with

Also associated with

No associations

Rating

Isotopic signatures of extinct low-temperature hydrothermal chimneys in the Jaroso Mars analog does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Isotopic signatures of extinct low-temperature hydrothermal chimneys in the Jaroso Mars analog, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Isotopic signatures of extinct low-temperature hydrothermal chimneys in the Jaroso Mars analog will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1839709