Final answer:
The provided references do not include information about Touré's dedication of "Floodtide," hence the dedication cannot be accurately identified from the available details.
Step-by-step explanation:
The information provided does not contain direct references to Touré's dedication of "Floodtide". The manuscripts, historical contexts, and important figures mentioned, such as the Mande leader Sundiata Keita and Henri Lhote's explorations in the Tassili, do not seem to relate to Touré or a work by the name of "Floodtide". Therefore, based on the provided references, it is not possible to accurately determine who did Touré dedicate "Floodtide" to. More specific sources or information would be required to answer this question correctly.