A WHOLE-CORE SQUEEZER FOR INTERFACIAL PORE-WATER SAMPLING
A WHOLE-CORE SQUEEZER FOR INTERFACIAL PORE-WATER SAMPLING
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DOI：
10.4319/lo.1987.32.6.1214
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发表时间：
1987-11-01
影响因子：
4.5
通讯作者：
LAMBERT, C
中科院分区：
文献类型：
--
作者：
BENDER, M;MARTIN, W;LAMBERT, C
“全岩心挤压器”是一种简单的孔隙水采样器，设计用于沉积物-水界面附近的毫米深度分辨率。已经进行了各种测试来确定全核挤压再现真实梯度的准确度。示踪剂研究表明，与挤压相关的任何混合不会使型材涂抹超过几毫米。根据圣克莱门特盆地（太平洋）全岩心挤压器解析的界面浓度梯度计算出的底栖 SiO2 通量与底部着陆器底栖室测量的“钟罩”值非常一致。使用全芯挤压器测定的氧分布与使用氧微电极测定的值非常相似。这些比较证实，O2、NO3-、SiO2 和其他颗粒非反应性离子和分子的界面梯度和（通过模型计算）通量可以使用仪器确定。另一方面，挤压孔隙水的组成非常容易受到固溶反应的快速改变。因此，该方法不适用于测定痕量金属和其他颗粒反应性化学物质的孔隙水剖面。
The "whole-core squeezer" is a simple pore-water sampler designed for millimeter depth resolution near the sediment-water interface. Various tests have been done to determine how accurately true gradients are reproduced by whole-core squeezing. Tracer studies show that any mixing associated with squeezing does not smear the profiles by more than a few millimeters. Benthic fluxes of SiO2 calculated from interfacial concentration gradients resolved with the whole-core squeezer in San Clemente Basin [Pacific Ocean] are in good agreement with "bell-jar" values measured with the benthic chambers of a bottom lander. Oxygen profiles determined with the whole-core squeezer are very similar to values determined with an oxygen microelectrode. These comparisons confirm that interfacial gradients and(by calculation from models) fluxes of O2, NO3-, SiO2, and other particle-unreactive ions and molecules can be determined with the instrument. On the other hand, the composition of squeezed pore waters is very susceptible to rapid alteration by solid-solution reactions. Therefore the method is not suitable for determining pore-water profiles of trace metals and other particle-reactive chemicals.