海洋地质与第四纪地质2025，Vol.45Issue(1)：122-135,14.DOI:10.16562/j.cnki.0256-1492.2024062001
西南太平洋劳盆地东北部火山岛弧热液区羽流中Zn形态分布特征
The characteristics of Zn species in hydrothermal plumes above arc volcanoes in the Northeast of Lau Basin,Southwest Pacific Ocean
摘要
Abstract
Seafloor hydrothermal fluids are rich in various metal elements and could be one of the important sources of metals in the ocean.We investigated Zn species in hydrothermal plumes in different types of hydrothermal systems(water-rock and magmatic-hydrothermal systems)in the northeastern Lau Basin,Southwest Pacific,including particulate Zn(pZn),dissolved Zn(dZn),and colloidal Zn(cZn).Results show that the plumes contained higher pZn concentrations than background seawater(typically<0.5 nM)in maximum of 16.9 nM.In plumes from low-temperature magmatic-hydrothermal systems,pZn concentrations were comparatively low,but still higher than that in background seawater.Even in the plumes that originated from low-temperature venting at West Mata that had dispersed off to over 5 km,the pZn concentration could still reach 3.1 nM,which indicates that pZn did not precipitate rapidly but dispersed in the ocean with the plumes,and the seafloor hydrothermal systems could be one of the sources of pZn in the ocean.The analyses of dZn in the plumes revealed no significant difference in dZn concentration between the two types of hydrothermal systems.Although the input of hydrothermal fluids resulted in higher dZn concentrations in some plume samples compared to background seawater,the adsorption by particulate Fe led to lower dZn concentrations in other plume samples.Therefore,hydrothermal plumes could act as either a source or a sink of dZn in the ocean.Observations in scanning electron microscopy and energy-dispersive X-ray spectroscopy suggest that the cZn in plumes could be from volcanic eruption.关键词
Zn形态/热液羽流/火山岛弧/劳盆地Key words
Zn species/hydrothermal plume/arc volcano/Lau Basin分类
海洋科学引用本文复制引用
宋江,王文朋,王虎..西南太平洋劳盆地东北部火山岛弧热液区羽流中Zn形态分布特征[J].海洋地质与第四纪地质,2025,45(1):122-135,14.基金项目
国家重点研发计划"深海勇士号能力提升及科学应用"(2022YFC2805504) （2022YFC2805504）
国家自然科学基金项目"西太平洋劳盆地火山岛弧热液羽流区铜同位素组成及其演化"(42376066) （42376066）
