Novel device to collect deep‐sea porewater in situ: A focus on benthic carbonate chemistry
Novel device to collect deep‐sea porewater in situ: A focus on benthic carbonate chemistry
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原位收集深海孔隙水的新型装置：重点关注底栖碳酸盐化学
DOI：
10.1002/lom3.10530
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发表时间：
2022
期刊：
影响因子：
--
通讯作者：
Adkins, Jess F.
中科院分区：
文献类型：
--
作者：
Cetiner, Jaclyn E. P.;Berelson, William M.;Rollins, Nick E.;Barnhart, Holly A.;Liu, Xuewu;Dong, Sijia;Byrne, Robert H.;Adkins, Jess F.
我们设计、建造、测试和部署了一种新的设备，用于从深海沉积物中原位提取孔隙水，该设备可与标准多芯取样器配合使用。尽管孔隙水测量对许多应用非常重要，但在船载处理岩心的传统孔隙水处理过程中，许多取样伪影可能会使数据和解释产生偏差。在深海孔隙水中，当碳酸盐在岩心回收过程中作为温度和压力变化的函数沉淀时，会出现有据可查的人为现象，而孔隙水在过滤前与沉积物颗粒接触，从而降低孔隙水碱度和溶解无机碳（DIC）。在这里，我们提出了一种新的设备，通过在海底原位过滤孔隙水来消除这些采样伪影，重点是在cm尺度分辨率的沉积物-水界面附近，以获得准确的孔隙水剖面。我们记录了在1600-3200米深度处，与原位过滤的孔隙水相比，船上处理的沉积物岩心中的碱度损失为1-10%。我们还表明，碱度损失是一个函数的重量%沉积碳酸钙和水柱深度。在船上处理的沉积物岩心中，相对于原位孔隙水，碱度损失与DIC损失的平均比率为2.2，与碳酸盐沉淀的预期信号一致。除了收集孔隙水用于定义自然剖面外，我们还使用同位素标记的方解石在沉积柱内进行了第一次原位溶解实验。我们提出的证据表明，成功部署该设备上和附近的科科斯海岭在赤道东太平洋的深度和方解石饱和状态的范围。
We have designed, built, tested, and deployed a novel device to extract porewater from deep‐sea sediments in situ, constructed to work with a standard multicorer. Despite the importance of porewater measurements for numerous applications, many sampling artifacts can bias data and interpretation during traditional porewater processing from shipboard‐processed cores. A well‐documented artifact occurs in deep‐sea porewater when carbonate precipitates during core recovery as a function of temperature and pressure changes, while porewater is in contact with sediment grains before filtration, thereby lowering porewater alkalinity and dissolved inorganic carbon (DIC). Here, we present a novel device built to obviate these sampling artifacts by filtering porewater in situ on the seafloor, with a focus near the sediment–water interface on cm‐scale resolution, to obtain accurate porewater profiles. We document 1–10% alkalinity loss in shipboard‐processed sediment cores compared to porewater filtered in situ, at depths of 1600–3200 m. We also show that alkalinity loss is a function of both weight % sedimentary CaCO3and water column depth. The average ratio of alkalinity loss to DIC loss in shipboard‐processed sediment cores relative to in situ porewater is 2.2, consistent with the signal expected from carbonate precipitation. In addition to collecting porewater for defining natural profiles, we also conducted the first in situ dissolution experiments within the sediment column using isotopically labeled calcite. We present evidence of successful deployments of this device on and adjacent to the Cocos Ridge in the Eastern Equatorial Pacific across a range of depths and calcite saturation states.
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DOI：
10.1073/pnas.1804250115
发表时间：
2018-10
期刊：
Proceedings of the National Academy of Sciences
影响因子：
--
作者：
O. Sulpis;B. Boudreau;A. Mucci;Chris Jenkins;D. Trossman;B. Arbic;R. Key
通讯作者：
O. Sulpis;B. Boudreau;A. Mucci;Chris Jenkins;D. Trossman;B. Arbic;R. Key
近期海洋沉积物的孔隙流体和矿物学研究；
影响因子：
2
作者：
J. Bischoff;F. Sayles
通讯作者：
F. Sayles
影响因子：
2.9
作者：
B. Hales;S. Emerson;D. Archer
通讯作者：
B. Hales;S. Emerson;D. Archer
海洋沉积孔隙水原位采样器：钾消耗和钙富集的证据
影响因子：
56.9
作者：
F. Sayles;T. Wilson;D. N. Hume;P. Mangelsdorf
通讯作者：
P. Mangelsdorf
北太平洋底栖二氧化硅通量的空间模式反映了上层海洋的生产
DOI：
10.1016/j.dsr.2019.04.013
发表时间：
2019
期刊：
Deep Sea Research Part I: Oceanographic Research Papers
影响因子：
--
作者：
Hou, Yi;Hammond, Douglas E.;Berelson, William M.;Kemnitz, Nathaniel;Adkins, Jess F.;Lunstrum, Abby
通讯作者：
Lunstrum, Abby