A startling proposal of surface ice deposits near the equator is made in this report:

EVIDENCE FOR POSSIBLE EXPOSED WATER ICE DEPOSITS IN MARTIAN LOW LATITUDE CHASMS AND CHAOS.
C. Leovy1, S.E. Wood1, D. Catling1, D.R. Montgomery1, J. Moore2, C. Barnhart1, E. Ginder1, M. Louie1. 1Dept. of Atmospheric Sciences and Astrobiology Program, University of Washington, Box 351640, Seattle WA 98195. 2NASA Ames Research Center, MS 245-3, Space Science Division, Moffett Field CA 94035. (davidc@****.edu)
http://www.lpi.usra.edu/meetings/lpsc2004/pdf/2016.pdf

They base this on the similarity of the thermal inertia readings of these deposits with those of the north polar layer deposits and on the similarity in the layering seen in the deposits.
However, given the observation of sulfate deposits at the Opportunity site these Juventae deposits may also be sulfates. Perhaps a comparison can be made to thermal inertia of the outcrops at the Opportunity site.

Here's one image of the Juventae deposits:

MOC narrow-angle image M03-01709
Juventae Chasma--dark dunes and bright outcrop.
http://www.msss.com/moc_gallery/ab1_m04/images/M0301709.html

Bob Clark