Methane (CH4), Sulfate (SO4 2-), and others collected from E/V Nautilus in NE Pacific and Cascadia Margin from 2020-09-28 to 2020-09-30 (NCEI Accession 0276512)
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title: Methane (CH4), Sulfate (SO4 2-), and others collected from E/V Nautilus in NE Pacific and Cascadia Margin from 2020-09-28 to 2020-09-30 (NCEI Accession 0276512)
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abstract: These data were collected from sediment at two separate ~1000m deep methane seeps on the Cascadia Margin. Sediment cores were collected at the seeps and then at increasing distance from the areas of seepage. This distance is provided in the data set. Sediment plugs were extracted from cores at 3cm intervals. Depth of core indicates the bottom of the depth horizon. Ryzons were inserted at 2cm intervals into adjacently collected cores, and pore water was extracted for Ions, in particular Sulfate and Sulfide. Sediment depth listed is the depth at which the Ryzon was inserted below the surface of the sediment. 0 sediment depth values are from the overlying water collected from the same sediment core. Sediment was also frozen at -80C for later Rare Earth Element (REE) analysis. This sediment was digested in nitric acid and hydrofluoric acid before analysis on the indicated instrument. Sediment depth indicates the depth horizon it came from for REEs, for example 0 for REE equals the 0-1cm fraction and 2 is the 2-3cm sediment fraction.
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credit: Related Funding Agency: US DOC; NOAA; OAR; Office of Ocean Exploration and Research (OER)
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description: NCEI Accession 0276512 v1.1 was published.
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DateTime: 2023-02-07T18:57:16Z
output: (LE_Source)
sourceCitation: (CI_Citation)
title: NCEI Accession 0276512 v1.1
date: (CI_Date)
date: (inapplicable)
dateType: (CI_DateTypeCode) publication
citedResponsibleParty: (CI_ResponsibleParty)
individualName: (inapplicable)
contactInfo: (CI_Contact)
onlineResource: (CI_OnlineResource)
linkage: https://www.ncei.noaa.gov/archive/accession/0276512/1.1
protocol: HTTPS
name: NCEI Accession 0276512 v1.1
description: published 2023-02-07T18:57:16Z
function: (CI_OnLineFunctionCode) download
role: (inapplicable)
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dataQualityInfo: (DQ_DataQuality)
scope: (DQ_Scope)
level: (MD_ScopeCode) dataset
lineage: (LI_Lineage)
processStep: (LE_ProcessStep)
description: Parameter or Variable: Methane (CH4) (measured); Units: micromole/liter; Observation Category: laboratory analysis; Sampling Instrument: Cavity Ring Down Spectrometer - Picarro G2301; Sampling and Analyzing Method: 3 ml of sediment were preserved in 2ml 10 M NaOH in serum vials, stored upside down and refrigerated until injection on CRDS with a small sample injection module. Instrument was both recently factory calibrated and data were compared to known standard curve..
processStep: (LE_ProcessStep)
description: Parameter or Variable: Sulfate (SO4 2-) (measured); Units: ppm; Observation Category: laboratory analysis; Sampling Instrument: Integrion Ion Chromatograph; Sampling and Analyzing Method: Porewater was extracted using Ryzons on collected cores and analyzed on an Integrion Ion Chromatograph using an IonPac CS16-4µm, 4 x 250mm column. Data were fit to a standard curve..
processStep: (LE_ProcessStep)
description: Parameter or Variable: Hydrogen Sulfide (H2S) (measured); Units: micromole/kilogram; Observation Category: laboratory analysis; Sampling Instrument: Shimadzu UV-1201S spectrophotometer; Sampling and Analyzing Method: Porewater was extracted from sediment cores using ryzones. 1ml of samples was stabilized using zinc acetate. These stabilized sulfide samples were quantified on a Shimadzu UV-1201S spectrophotometer at 670 nm using a modified version of Cline’s methylene blue method, as described in (Cline, 1969)..
processStep: (LE_ProcessStep)
description: Parameter or Variable: Rare Earth Elements (measured); Units: microgram/miligram sediment; Observation Category: laboratory analysis; Sampling Instrument: Thermo iCap-Q ICP-MS; Sampling and Analyzing Method: Samples were run on a Thermo iCap-Q ICP-MS on 9/21/2022 at the Keck Collaboratory at Oregon State University. Standards were PACS-2 and JB-1a. These standards were injected throughout the run to ensure negligible drift.; Data Quality Method: Data values are a mean of three replicate analyses for each element in each sample. Minimum detection limit of all REEs was great than 0.32 ng/ml..
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metadataMaintenance: (MD_MaintenanceInformation)
maintenanceAndUpdateFrequency: (MD_MaintenanceFrequencyCode) asNeeded
maintenanceNote: Metadata are developed, maintained and distributed by NCEI. Updates are performed as needed to maintain currentness.
contact: (CI_ResponsibleParty)
organisationName: NOAA National Centers for Environmental Information
role: (CI_RoleCode) custodian
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acquisitionInformation: (MI_AcquisitionInformation)
instrument: (MI_Instrument)
identifier: (MD_Identifier)
code: chromatograph
type: chromatograph
description: Gas, ion, liquid or other chromatograph
instrument: (MI_Instrument)
identifier: (MD_Identifier)
code: corer
type: corer
description: submersible, hydraulic rotary coring drill
instrument: (MI_Instrument)
identifier: (MD_Identifier)
code: spectrophotometer
type: spectrophotometer
description: spectrophotometer, optical spectrometer, spectrograph or spectroscope An optical spectrometer (spectrophotometer, spectrograph or spectroscope) is an instrument used to measure properties of light over a specific portion of the electromagnetic spectrum, typically used in spectroscopic analysis to identify materials. Butler, L. R. P.; Laqua, K. (1995). "Nomenclature, symbols, units and their usage in spectrochemical analysis-IX. Instrumentation for the spectral dispersion and isolation of optical radiation (IUPAC Recommendations 1995)". Pure Appl. Chem. IUPAC. 67 (10): 1725–1744. doi:10.1351/pac199567101725. A spectrometer is the general term for describing a combination of spectral apparatus with one or more detectors to measure the intensity of one or more spectral bands."
platform: (MI_Platform)
identifier: (MD_Identifier)
code: E/V Nautilus
description: Updated information from ICES for the vessel NAUTILUS from VC: SAINT VINCENT AND THE GRENADINES. Name : NAUTILUS Country(s) : VC: SAINT VINCENT AND THE GRENADINES (ISO Country Code) Platform Class : 31: Research vessel Call Sign : J8B3605 MMSI: 376404000 IMO : 6711883 Title : EV Commissioned Date : 2009 Current Length : 64 Built : 1967 Previous Name (Notes): A.V.HUMBOLDT WOD Code: 11786 Notes : Exploration vessel owned by the Ocean Exploration Trust. Equipped with ROVs. Built as GEORGIUS AGRICOLA (DDDE), became ALEXANDER v.HUMBOLDT in 1970, A.V.Humboldt from 1992 (DE), became FRANKLIN (AG) in 2004, became Alexander Von Humboldt (VC) in 2006, became A.v.HUMBOLDT in 2009, became NAUTILUS in 2009. Built as trawler, converted to RV in 1970-78. Information Sources: - https://www.oceanexplorationtrust.org/ev-nautilus - https://en.wikipedia.org/wiki/EV_Nautilus - https://www.marinetraffic.com/en/ais/details/ships/shipid:467893/mmsi:376404000/imo:6711883/vessel:NAUTILUS - http://www.shipspotting.com/gallery/photo.php?lid=1455570 - http://www.shipspotting.com/gallery/photo.php?lid=1914941 Same Vessels Info: 07AL - A. V. HUMBOLDT 06VH - A. V. HUMBOLDT General Comments: Carries ROVs Hercules and Argus IMO confirmed in Miramar and Equasis. Not found in ITU. Confirmed by NOAA on 2019-12-30. (FY2020) Submitted to ICES 2019-07-09
instrument: (missing)
