Geologic setting and origin of Terra Meridiani hematite deposit on Mars
If you haven't already read it, I recommend the following paper:
Hynek, B.M.; Arvidson, R.E.; Phillips, R.J., Geologic setting and origin of Terra Meridiani hematite deposit on Mars, J. Geophys. Res, 107, 10.1029/2002JE001891, 2002.
~1.2 Mb PDF reprint.
