南大洋普里兹湾沉积物中生物硅的溶解度研究

doi:10.3724/SP.J.1084.2012.00339

极地研究 ›› 2012, Vol. 24 ›› Issue (4): 339-345.DOI: 10.3724/SP.J.1084.2012.00339

南大洋普里兹湾沉积物中生物硅的溶解度研究

扈传昱^1.2　孙维萍²沈忱²张海生^1.2

¹中国地质大学资源学院，湖北武汉 430074；
²国家海洋局海洋生态系统与生物地球化学重点实验室，浙江杭州 310012

收稿日期:2012-05-14 修回日期:2012-08-06 出版日期:2012-12-30 发布日期:2012-12-30
通讯作者: 扈传昱

THE SOLUBILITY OF BIOGENIC SILICA IN THE SEDIMENT OF PRYDZ BAY，THE SOUTHERN OCEAN

Hu Chuanyu^1,2，Sun Weiping²，Shen Chen²，Zhang Haisheng^1,2

¹China University of Geosciences, Faculty of Resources, Wuhan 430074, China;
²Lab of Marine Ecosystem and Biogeochemistry, SOA Second Institute of Oceanography, SOA, Hangzhou 310012, China

Received:2012-05-14 Revised:2012-08-06 Online:2012-12-30 Published:2012-12-30

摘要/Abstract

摘要： 本文利用中国南极科学考察航次获得的沉积物样品，采用分批（batch）实验方法，获取实验室生物硅溶解度，并结合间隙水中可溶性硅剖面，对普里兹湾沉积物中生物硅的溶出过程进行了初步研究。研究结果如下：在25℃，pH 8条件下，普里兹湾IV-10、 IS-4站表层沉积物中生物硅的实验室溶解度分别为1936、1539μmol/dm3，不同层次沉积物溶出结果显示随深度增加溶解度值降低。根据实验室溶解度数据与间隙水硅酸盐Cd的分析比较，表明研究站位沉积物生物硅的早期成岩过程中生物硅的溶出还伴随有其他化学过程。

关键词: 生物硅, 溶解度, 沉积物, 间隙水, 普里兹湾

Abstract: Laboratory-based solubility determinations of biogenic silica have been performed in batch reactors on sediments from two cores collected in Prydz Bay of the Southern Ocean. The results show that the apparent solubility of BSi(biogenic silica) in the top sediments of IV-10 and IS-4 station were 1930 μmol/dm3 and 1540μmol/dm3, respectively, and decrease with depth in the core. The apparent solubility of BSi were much higher than the value of Cd of DSi (dissolved silica) in pore water. The pore water distributions of DSi record early diagenetic histories that may involve chemical interactions other than simply the dissolution of the deposited BSi.

Key words: biogenic silica, solubility, sediment, pore water, Prydz Bay

扈传昱孙维萍沈忱张海生. 南大洋普里兹湾沉积物中生物硅的溶解度研究[J]. 极地研究, 2012, 24(4): 339-345.

Hu Chuanyu，Sun Weiping，Shen Chen，Zhang Haisheng. THE SOLUBILITY OF BIOGENIC SILICA IN THE SEDIMENT OF PRYDZ BAY，THE SOUTHERN OCEAN[J]. ADVANCES IN POLAR SCIENCE, 2012, 24(4): 339-345.

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南大洋普里兹湾沉积物中生物硅的溶解度研究

THE SOLUBILITY OF BIOGENIC SILICA IN THE SEDIMENT OF PRYDZ BAY，THE SOUTHERN OCEAN

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