@article{fdi:010092085,
  title = {{I}mpact of submarine volcanic versus hydrothermal activity onto the strontium and lithium isotopic signatures of the water column ({TONGA})},
  author = {{C}havagnac, {V}. and {D}estrigneville, {C}. and {B}oulart, {C}. and {T}aillandier, {V}. and {V}igier, {N}. and {G}uieu, {C}. and {B}onnet, {S}ophie},
  editor = {},
  language = {{ENG}},
  abstract = {{D}uring the {TONGA} cruise (2019), seawater samples were collected to assess the effect of volcanic eruption versus submarine hydrothermal system on the water column. {F}or this purpose, two locations were investigated, the first one located directly under the influence of the {N}ew {L}ate'iki island (eruption in {O}ctober 2019), and the second one showing ongoing submarine hydrothermal activity. {A}t both locations, the total strontium ({TS}r) and lithium ({TL}i) concentrations vary between 94.4 and 152.3 mu mol/{L} and 13.2 and 203.5 mu mol/{L}, respectively. {W}hen combined, {TS}r and {TL}i concentrations of all samples in the water column are higher than those of the oligotrophic water. {B}oth volcanic eruption and submarine hydrothermal activity (e.g. volcanic ashes, particles, gas condensate) can deliver substantial amount of {TS}r and {TL}i to the water column. {T}he distribution of {TS}r versus {TL}i evidences linear trends either with a negative or positive slope. {T}he negative correlation is observed in the water column at both sites, directly under the influence of the eruption and in the vicinity of the volcano with hydrothermal activity. {T}he positive {TS}r versus {TL}i correlation is observed at site under submarine hydrothermal influence and is in line with black smokers related hydrothermal plumes. {T}he {S}r-87/{S}r-86 ratios vary between 0.709147 and 0.709210 and delta {L}i-7 values vary between +10.1 and +37.6 parts per thousand. {W}hile 92% of the measured {S}r-87/{S}r-86 ratios are in line with the mean value of oligotrophic waters, once combined with the delta {L}i-7 values, only 20% of them remains within this field. {T}he wide range of delta {L}i-7 values decreases from sea-surface down to similar to 140 mbsl, before increasing at greater depth, while defining different linear trend according to the dissolved inorganic carbon concentrations. {T}he variability of delta {L}i-7 values reflect hydrothermal contribution, mineral-seawater interaction and potentially biology-environment interaction. {I}n the particular geological setting of the study, where both hydrothermal and volcanic activities were at play, disentangling both contributions on water column implies a combined use of elemental and isotopic signatures of {S}r and {L}i tracers.},
  keywords = {lithium isotopes ; strontium ; hydrothermalism ; volcanic eruption ; {TONGA} ; {PACIFIQUE} ; {TONGA} ; {KERMADEC} ; {PACIFIQUE} {SUD}},
  booktitle = {},
  journal = {{F}rontiers in {M}arine {S}cience},
  volume = {11},
  numero = {},
  pages = {1304930 [15 p.]},
  year = {2024},
  DOI = {10.3389/fmars.2024.1304930},
  URL = {https://www.documentation.ird.fr/hor/fdi:010092085},
}