I am not a peat expert, but had to do a summary paper on South Florida peats and coastal wetlands . . . perhaps some of the references in there would be helpful:
Brazilian wetlands: their definition, delineation, and classification for research, sustainable management, and protection. Aquatic Conservation: Marine and Freshwater Ecosystems. http://onlinelibrary.wiley.com/doi/10.1002/aqc.2386/abstract
Although they are now quite old, you may find that the papers of J A R Anderson on the developement of freshwater peat swamps and their forests in Sararwak, Malyasia give a good background on the formation of extensive deep tropical peats.
Although they are now quite old, you may find that the papers of J A R Anderson on the developement of freshwater peat swamps and their forests in Sararwak, Malyasia give a good background on the formation of extensive deep tropical peats.