Sampling of basement fluids via Circulation Obviation Retrofit Kits (CORKs) for dissolved gases, fluid fixation at the seafloor, and the characterization of organic carbon

Sampling of basement fluids via Circulation Obviation Retrofit Kits (CORKs) for dissolved gases, fluid fixation at the seafloor, and the characterization of organic carbon
复制标题

通过循环消除改造套件 (CORK) 对基底流体进行采样,以测定溶解气体、海底流体固定以及有机碳的表征

DOI:
10.1016/j.mex.2020.101033
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发表时间:
2020
期刊:
影响因子:
1.9
通讯作者:
Rappé, Michael S.
Rappé, Michael S.
中科院分区:
--
文献类型:
--
作者:
Lin, Huei-Ting;Hsieh, Chih-Chiang;Repeta, Daniel J.;Rappé, Michael S.

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先进的仪器化 GeoMICROBE 雪橇(Cowen 等人,2012)通过安装在综合海洋钻探计划的钻孔内的循环观测改造套件(CORK),有助于收集海底(玄武岩)基底中的热液和悬浮颗粒。 GeoMICROBE 的主要组件可以转换成移动泵送系统 (MPS),安装在潜水器或遥控潜水器 (ROV) 的前篮上。在这里,我们提供了 MPS 上使用的热液流体捕集器的详细信息,气密采样器可以通过该流体捕集器抽取流体。我们还应用 MPS 来证明在海底固定样品的价值,以确定氧化还原敏感的溶解铁浓度和形态测量。为了充分利用 GeoMICROBE 雪橇,我们描述了 GeoMICROBE 雪橇的微型移动版本,它允许快速周转并且相对容易准备和操作。与 GeoMICROBE 雪橇类似,Mobile GeoMICROBE (MGM) 能够收集流体样本、过滤悬浮颗粒和提取有机物。我们通过演示从大量 (247L) 热液中提取疏水性有机物的海底提取来验证这种方法。•我们描述了与气密采样器一起使用的热液捕集器的设计,以及通过 ROV 或潜水辅助移动泵系统使用海底固定。•我们描述了移动 GeoMICROBE (MGM) 的设计,该设计增强了大容量热液采样、悬浮颗粒过滤和有机物的检测海底提取。•我们提供了通过 MGM 从热液中提取有机物并对其进行表征的示例。
The advanced instrumented GeoMICROBE sleds (Cowen et al., 2012) facilitate the collection of hydrothermal fluids and suspended particles in the subseafloor (basaltic) basement through Circulation Obviation Retrofit Kits (CORKs) installed within boreholes of the Integrated Ocean Drilling Program. The main components of the GeoMICROBE can be converted into a mobile pumping system (MPS) that is installed on the front basket of a submersible or remotely-operated-vehicle (ROV). Here, we provide details of a hydrothermal fluid-trap used on the MPS, through which a gastight sampler can withdraw fluids. We also applied the MPS to demonstrate the value of fixing samples at the seafloor in order to determine redox-sensitive dissolved iron concentrations and speciation measurements. To make the best use of the GeoMICROBE sleds, we describe a miniature and mobile version of the GeoMICROBE sled, which permits rapid turn-over and is relatively easy for preparation and operation. Similar to GeoMICROBE sleds, the Mobile GeoMICROBE (MGM) is capable of collecting fluid samples, filtration of suspended particles, and extraction of organics. We validate this approach by demonstrating the seafloor extraction of hydrophobic organics from a large volume (247L) of hydrothermal fluids.•We describe the design of a hydrothermal fluid-trap for use with a gastight sampler, as well as the use of seafloor fixation, through ROV- or submersible assisted mobile pumping systems.•We describe the design of a Mobile GeoMICROBE (MGM) that enhances large volume hydrothermal fluid sampling, suspended particle filtration, and organic matter extraction on the seafloor.•We provide an example of organic matter extracted and characterized from hydrothermal fluids via a MGM.
原始氦通过海底脊侧玄武岩基底的地幔脱气
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