Fadime Stemmer, M.Sc.¹, Daniella Asturias², Loay Jabre³, Matthew R McIlvin², Elizabeth B Kujawinski⁴ and Mak A Saito⁵, (1)The MIT-WHOI Joint Program in Oceanography/Applied Ocean Science and Engineering, Earth, Atmospheric, and Planetary Sciences / Marine Chemistry and Geochemistry, Cambridge and Woods Hole, United States, (2)Woods Hole Oceanographic Institution, Marine Chemistry and Geochemistry, Woods Hole, United States, (3)Dalhousie University, Department of Biology, Halifax, NS, Canada, (4)Woods Hole Oceanographic Inst, Marine Chemistry & Geochemistry, Woods Hole, United States, (5)Woods Hole Oceanographic Institution, Marine Chemistry and Geochemistry, Woods Hole, MA, United States