The paper is ready for publication, but needs attention to two final aspects.
1. Careful use of appropriate geographical vocabulary in English.
Specifically, the paper often refers to "the margins" as a location from which iron may be supplied. But the meaning of this term is rather unclear. For example, in the Abstract there are three sentences that address this issue, yet it is unclear if they all refer to the same thing or are attempts to discriminate among different possible iron sources:
line 4 ...Kerguelen Islands, a bloom which is sustained partly by iron released from the sediments deposited onto the margins.
Line 15 ...chemical elements released from the sediments of the Kerguelen Plateau
Line 17...shallow sediments of the Kerguelen margins.
I think the best solution is probably to eliminate the use of the word “margins” which seems to be a loose translation from the French “marges” and replace it by shelves, or shelf edges, or island edges, or plateau sediments, depending on the specific context.
This issue needs attention primarily in the Abstract but also in the text at lines 30, 53, 58, 73, 264, 270, 284, 394, 450, 454

2. Correction of a few remaining typos:
Line 34 change “...offshore the Kerguelen...” to “...offshore of the Kerguelen ...”’
Line 44, add comma ‘....Kerguelen Islands, the numerous...”
Line 83: change “...iron fertilization off Kerguelen Islands...” to “...iron fertilization downstream of the Kerguelen islands...”
Line 164: change ‘...given by (Dibarboure et al., 2011).” to “...given by Dibarboure et al. (2011).”

line 4 ...Ker