Lipid biomarker analyses (alkanes, sterols and fatty acids) of authigenic carbonates collected on the FK190612 research expedition in the north Pacific Ocean in June and July 2019 along the Cascadia Margin.

Metadata also available as - [Outline] - [Parseable text] - [XML]

Frequently anticipated questions:

What does this data set describe?

Title:
Lipid biomarker analyses (alkanes, sterols and fatty acids) of authigenic carbonates collected on the FK190612 research expedition in the north Pacific Ocean in June and July 2019 along the Cascadia Margin.
Abstract:
Carbonate lipid biomarkers (n-alkanes, fatty acids, and fatty alcohols/sterols) were determined in carbonate rocks collected on the FK190612 research expedition in the north Pacific Ocean along the Cascadia Margin on in June and July 2019.
Supplemental_Information:
Additional information about the field activities from which these data were derived is available online at:
https://cmgds.marine.usgs.gov/fan_info.php?fan=2019-619-FA
Any use of trade, product, or firm names is for descriptive purposes only and does not imply endorsement by the U.S. Government.
  1. How might this data set be cited?
    Campbell, Pamela L., and Prouty, Nancy G., 20241121, Lipid biomarker analyses (alkanes, sterols and fatty acids) of authigenic carbonates collected on the FK190612 research expedition in the north Pacific Ocean in June and July 2019 along the Cascadia Margin.: data release DOI: 10.5066/P1VR2IYU, U.S. Geological Survey, Pacific Coastal and Marine Science Center, Santa Cruz, California.

    Online Links:

    This is part of the following larger work.

    Prouty, Nancy G., Baker, Miranda C., and Campbell, Pamela L., 2024, Geochemical analysis of authigenic carbonates, water column, and pore fluids measurements collected on the FK190612 research expedition in the north Pacific Ocean along the Cascadia margin in June 2019: data release DOI: 10.5066/P1VR2IYU, U.S. Geological Survey, Pacific Coastal and Marine Science Center, Santa Cruz, CA.

    Online Links:

    Other_Citation_Details:
    Suggested Citation: Prouty, N.G., Baker, M.C., and Campbell, P.L., 2024, Geochemical analysis of authigenic carbonates, water column, and pore fluids measurements collected on the FK190612 research expedition in the north Pacific Ocean along the Cascadia margin in June 2019: U.S. Geological Survey data release, https://doi.org/10.5066/P1VR2IYU.
  2. What geographic area does the data set cover?
    West_Bounding_Coordinate: -125.14964
    East_Bounding_Coordinate: -124.64601
    North_Bounding_Coordinate: 46.9608
    South_Bounding_Coordinate: 43.01198
  3. What does it look like?
  4. Does the data set describe conditions during a particular time period?
    Beginning_Date: 13-Jun-2019
    Ending_Date: 02-Jul-2019
    Currentness_Reference:
    Ground condition at time data were collected.
  5. What is the general form of this data set?
    Geospatial_Data_Presentation_Form: comma-delimited text
  6. How does the data set represent geographic features?
    1. How are geographic features stored in the data set?
      This is a Point data set. It contains the following vector data types (SDTS terminology):
      • Point (18)
    2. What coordinate system is used to represent geographic features?
      Horizontal positions are specified in geographic coordinates, that is, latitude and longitude. Latitudes are given to the nearest 0.00001. Longitudes are given to the nearest 0.00001. Latitude and longitude values are specified in Decimal degrees. The horizontal datum used is D_WGS_1984.
      The ellipsoid used is WGS84.
      The semi-major axis of the ellipsoid used is 6378137.0000.
      The flattening of the ellipsoid used is 1/298.2572.
  7. How does the data set describe geographic features?
    FK190612_carbonate_data.csv
    Table of data. Abbreviations: -9999, not determined; -8888, compound was not detected. (Source: Producer defined)
    Station
    Name of ROV station based on cruise number (FK190612=Falkor) and cruise start date and consecutive ROV SuBastian dive number (for example, S257) (Source: Producer defined) List of station names
    Lab ID
    Unique identifier assigned to each sample based on collection order. (Source: Producer defined) Unique alphanumeric sample identifier
    Date collected
    Date the sample was collected, in mm/dd/yy (Source: Producer defined)
    Range of values
    Minimum:06/15/2019
    Maximum:07/01/2019
    Units:mm/dd/yy
    Resolution:1
    Latitude
    Latitude where the sample was collected (Source: Producer defined)
    Range of values
    Minimum:46.01198
    Maximum:43.96080
    Units:decimal degrees
    Resolution:0.00001
    Longitude
    Longitude where the sample was collected (Source: Producer defined)
    Range of values
    Minimum:-125.14964
    Maximum:-124.64601
    Units:decimal degrees
    Resolution:0.00001
    depth
    Depth from the surface (Source: Producer defined)
    Range of values
    Minimum:194.601
    Maximum:1042.550
    Units:meters
    Resolution:0.001
    Location
    Location where the sample was collected (Source: Producer defined) Text descriptor of sampling site based on location (Astoria=Astoria Canyon; Gray’s=Grays Canyon; Heceta = Heceta Bank; Coquille; Nehalem Bank; McArthur Escarpment) and water depth (shallow, deep) or approximate depth (for example 500 m).
    percent total organic carbon
    Percentage by weight (wt percent) of total organic carbon (TOC); -8888=compound was not detected (Source: Producer defined)
    Range of values
    Minimum:0.216
    Maximum:0.873
    Units:percent weight
    Resolution:0.001
    C14
    Concentration of tetradecane (C14 n-alkane), -9999=not determined (Source: Producer defined)
    Range of values
    Minimum:0.30
    Maximum:3.11
    Units:organic carbon normalized milligrams per kilogram (mg/kg OC)
    Resolution:0.01
    C15
    Concentration of pentadecane (C15 n-alkane), -9999=not determined (Source: Producer defined)
    Range of values
    Minimum:0.4
    Maximum:4.5
    Units:organic carbon normalized milligrams per kilogram (mg/kg OC)
    Resolution:0.1
    C16
    Concentration of hexadecane (C16 n-alkane), -9999=not determined (Source: Producer defined)
    Range of values
    Minimum:0.2
    Maximum:53.1
    Units:organic carbon normalized milligrams per kilogram (mg/kg OC)
    Resolution:0.1
    C17
    Concentration of heptadecane (C17 n-alkane), -9999=not determined (Source: Producer defined)
    Range of values
    Minimum:0.3
    Maximum:125.0
    Units:organic carbon normalized milligrams per kilogram (mg/kg OC)
    Resolution:0.1
    Pristane
    Concentration of pristane, -9999=not determined (Source: Producer defined)
    Range of values
    Minimum:0.0
    Maximum:6.0
    Units:organic carbon normalized milligrams per kilogram (mg/kg OC)
    Resolution:0.1
    C18
    Concentration of octadecane (C18 n-alkane), -9999=not determined (Source: Producer defined)
    Range of values
    Minimum:0.3
    Maximum:5.7
    Units:organic carbon normalized milligrams per kilogram (mg/kg OC)
    Resolution:0.1
    Phytane and or Crocetane
    Concentration of phytane and/or crocetana, -9999=not determined (Source: Producer defined)
    Range of values
    Minimum:2.1
    Maximum:519.7
    Units:organic carbon normalized milligrams per kilogram (mg/kg OC)
    Resolution:0.1
    C19
    Concentration of nonadecane (C19 n-alkane), -9999=not determined (Source: Producer defined)
    Range of values
    Minimum:0.6
    Maximum:125.2
    Units:organic carbon normalized milligrams per kilogram (mg/kg OC)
    Resolution:0.1
    C20
    Concentration of eicosane (C20 n-alkane), -9999=not determined (Source: Producer defined)
    Range of values
    Minimum:0.7
    Maximum:168.7
    Units:organic carbon normalized milligrams per kilogram (mg/kg OC)
    Resolution:0.1
    C21
    Concentration of heneicosane (C21 n-alkane), -9999=not determined (Source: Producer defined)
    Range of values
    Minimum:0.4
    Maximum:271.6
    Units:organic carbon normalized milligrams per kilogram (mg/kg OC)
    Resolution:0.1
    C22
    Concentration of docosane (C22 n-alkane), -9999=not determined (Source: Producer defined)
    Range of values
    Minimum:0.5
    Maximum:429.8
    Units:organic carbon normalized milligrams per kilogram (mg/kg OC)
    Resolution:0.1
    PMI 1
    Concentration of pentamethyl-eicosane (C20 branched alkane), -9999=not determined (Source: Producer defined)
    Range of values
    Minimum:5.1
    Maximum:325.6
    Units:organic carbon normalized milligrams per kilogram (mg/kg OC)
    Resolution:.1
    PMI 2
    Concentration of pentamethyl-eicosane (C20 branched alkane), -9999=not determined (Source: Producer defined)
    Range of values
    Minimum:0.2
    Maximum:615.3
    Units:organic carbon normalized milligrams per kilogram (mg/kg OC)
    Resolution:.1
    C23
    Concentration of tricosane (C23 n-alkane), -9999=not determined (Source: Producer defined)
    Range of values
    Minimum:0.0
    Maximum:364.8
    Units:organic carbon normalized milligrams per kilogram (mg/kg OC)
    Resolution:.1
    C24
    Concentration of tetracosane (C24 n-alkane), -9999=not determined (Source: Producer defined)
    Range of values
    Minimum:0.3
    Maximum:34.9
    Units:organic carbon normalized milligrams per kilogram (mg/kg OC)
    Resolution:0.1
    C25
    Concentration of pentacosane (C25 n-alkane), -9999=not determined (Source: Producer defined)
    Range of values
    Minimum:0.4
    Maximum:24.0
    Units:organic carbon normalized milligrams per kilogram (mg/kg OC)
    Resolution:0.1
    C26
    Concentration of hexacosane (C26 n-alkane), -9999=not determined (Source: Producer defined)
    Range of values
    Minimum:0.3
    Maximum:115. 8
    Units:organic carbon normalized milligrams per kilogram (mg/kg OC)
    Resolution:0.1
    C27
    Concentration of heptacosane (C27 n-alkane), -9999=not determined (Source: Producer defined)
    Range of values
    Minimum:0.6
    Maximum:35.9
    Units:organic carbon normalized milligrams per kilogram (mg/kg OC)
    Resolution:0.1
    C28
    Concentration of octacosane (C28 n-alkane), -9999=not determined (Source: Producer defined)
    Range of values
    Minimum:0.6
    Maximum:30.2
    Units:organic carbon normalized milligrams per kilogram (mg/kg OC)
    Resolution:0.1
    C29
    Concentration of nonacosane (C29 n-alkane), -9999=not determined (Source: Producer defined)
    Range of values
    Minimum:0.7
    Maximum:31.2
    Units:organic carbon normalized milligrams per kilogram (mg/kg OC)
    Resolution:0.1
    C30
    Concentration of triacontane (C30 n-alkane), -9999=not determined (Source: Producer defined)
    Range of values
    Minimum:0.2
    Maximum:49.8
    Units:organic carbon normalized milligrams per kilogram (mg/kg OC)
    Resolution:0.1
    C31
    Concentration of hentriacontane (C31 n-alkane), -9999=not determined (Source: Producer defined)
    Range of values
    Minimum:0.3
    Maximum:94.5
    Units:organic carbon normalized milligrams per kilogram (mg/kg OC)
    Resolution:0.1
    C32
    Concentration of dotriacontane (C32 n-alkane), -9999=not determined (Source: Producer defined)
    Range of values
    Minimum:10
    Maximum:10
    Units:organic carbon-normalized milligrams per kilogram (mg/kg OC)
    Resolution:10
    C33
    Concentration of tritriacontane (C33 n-alkane), -9999=not determined (Source: Producer defined)
    Range of values
    Minimum:3.6
    Maximum:3.6
    Units:organic carbon-normalized milligrams per kilogram (mg/kg OC)
    Resolution:0.1
    cholesterol
    Concentration of cholesterol, -9999=not determined (Source: Producer defined)
    Range of values
    Minimum:54.6
    Maximum:853.1
    Units:organic carbon-normalized milligrams per kilogram (mg/kg OC)
    Resolution:0.1
    brassicasterol
    Concentration of brassicasterol, -9999=not determined (Source: Producer defined)
    Range of values
    Minimum:14.8
    Maximum:768.4
    Units:organic carbon-normalized milligrams per kilogram (mg/kg OC)
    Resolution:0.1
    campesterol
    Concentration of campesterol, -9999=not determined (Source: Producer defined)
    Range of values
    Minimum:22.5
    Maximum:257.4
    Units:organic carbon-normalized milligrams per kilogram (mg/kg OC)
    Resolution:0.1
    stigmasterol
    Concentration of stigmasterol, -9999=not determined (Source: Producer defined)
    Range of values
    Minimum:10.8
    Maximum:272.3
    Units:organic carbon-normalized milligrams per kilogram (mg/kg OC)
    Resolution:0.1
    B-sitosterol
    Concentration of B-sitosterol, -9999 =not determined (Source: Producer defined)
    Range of values
    Minimum:33.3
    Maximum:542.1
    Units:organic carbon-normalized milligrams per kilogram (mg/kg OC)
    Resolution:0.1
    sn-2-hydroxy archaeol
    Concentration of sn-2-hydroxy archaeol (2-O-3-hydroxyphytanyl-3-O-phytanyl-sn-glycerol), -9999=not determined (Source: Producer defined)
    Range of values
    Minimum:19.3
    Maximum:615.7
    Units:organic carbon-normalized milligrams per kilogram (mg/kg OC)
    Resolution:0.1
    sn-3-hydroxy archaeol
    Concentration of sn-3-hydroxy archaeol, -9999=not determined (Source: Producer defined)
    Range of values
    Minimum:13.1
    Maximum:746.5
    Units:organic carbon-normalized milligrams per kilogram (mg/kg OC)
    Resolution:0.1
    archaeol
    Concentration of archaeol (2,3-di-O-phytanyl-sn-glycerol), -9999=not determined (Source: Producer defined)
    Range of values
    Minimum:37.0
    Maximum:1680.0
    Units:organic carbon-normalized milligrams per kilogram (mg/kg OC)
    Resolution:0.1
    anteiso C15:0
    Concentration of pentadecenoate normalized to iso pentadecanoate, -8888=compound was not detected (Source: Producer defined)
    Range of values
    Minimum:0.5
    Maximum:2.0
    Units:organic carbon-normalized milligrams per kilogram (mg/kg OC)
    Resolution:0.1
    C16:1 a
    Concentration of hexadecenoate normalized to iso pentadecanoate, -8888=compound was not detected (Source: Producer defined)
    Range of values
    Minimum:0.3
    Maximum:12.1
    Units:organic carbon-normalized milligrams per kilogram (mg/kg OC)
    Resolution:0.1
    C16:1 b
    Concentration of hexadecenoate normalized to iso pentadecanoate, -9999=not determined, -8888=compound was not detected (Source: Producer defined)
    Range of values
    Minimum:0.1
    Maximum:1.3
    Units:organic carbon-normalized milligrams per kilogram (mg/kg OC)
    Resolution:0.01
    iso C17:0
    Concentration of heptadecanoate normalized to iso pentadecanoate, -9999=not determined, -8888=compound was not detected (Source: Producer defined)
    Range of values
    Minimum:0.2
    Maximum:0.7
    Units:organic carbon-normalized milligrams per kilogram (mg/kg OC)
    Resolution:0.1
    10-methyl-C16:1
    Concentration of 10-methyl hexadecenoate normalized to iso pentadecanoate, -9999=not determined, -8888=compound was not detected (Source: Producer defined)
    Range of values
    Minimum:0.1
    Maximum:8.7
    Units:organic carbon-normalized milligrams per kilogram (mg/kg OC)
    Resolution:0.1
    C16:1 w7
    Ratio of omega 7 hexadecenoate to iso pentadecanoate, -9999=not determined, -8888=compound was not detected (Source: Producer defined)
    Range of values
    Minimum:0.7
    Maximum:13.5
    Units:organic carbon-normalized milligrams per kilogram (mg/kg OC)
    Resolution:0.1
    Entity_and_Attribute_Overview: The first line of the csv file is a header line.
    Entity_and_Attribute_Detail_Citation: U.S. Geological Survey

Who produced the data set?

  1. Who are the originators of the data set? (may include formal authors, digital compilers, and editors)
    • Pamela L. Campbell
    • Nancy G. Prouty
  2. Who also contributed to the data set?
  3. To whom should users address questions about the data?
    U.S. Geological Survey, Pacific Coastal and Marine Science Center
    Attn: PCMSC Science Data Coordinator
    2885 Mission Street
    Santa Cruz, CA

    831-427-4747 (voice)
    pcmsc_data@usgs.gov

Why was the data set created?

Authigenic carbonate rocks were analyzed in an effort to characterize the lipid biomarkers incorporated into the carbonate matrix. Lipid biomarkers were analyzed to place constraints on the depositional environments and associated methane seepage events which mediate the anaerobic oxidation of methane (AOM), mediated by anaerobic methane oxidizing archaea (ANME) and sulfate-reducing bacteria (SRB), which results in the production of sulfide and bicarbonates in anoxic sediments, and promotes the precipitation of carbonates from oversaturation of bicarbonates in pore fluid.

How was the data set created?

  1. From what previous works were the data drawn?
  2. How were the data generated, processed, and modified?
    Date: 15-Nov-2023 (process 1 of 1)
    PLANT BIOMARKER CONCENTRATIONS (N-ALKANES, STEROLS, FATTY ACIDS): The biomarker composition of the authigenic carbonate rocks was determined by gas chromatography–mass spectrometry (GC–MS) at the USGS Organic Geochemistry laboratory in Santa Cruz, California. The samples were extracted using a Dionex ASE with a mixture of dichloromethane and methanol (9:1;v:v) and acetone: hexane (1:1;v:v). Prior to extraction, internal standards were added (5-alpha androstane and 5 alpha-androstan-3-beta-ol). The lipid extracts were passed though glass funnels containing sodium sulfate to remove excess water, followed by separation into compound classes by silica gel column chromatography (silica gel 60). The following fractions were eluted: (1) F1-hydrocarbons (100 percent n-hexane), (2) F2-aromatics (50 percent toluene: hexane), (3)F3- alcohols, ketones (20 percent ethyl acetate: hexane), and, F4 (40 percent ethyl acetate:hexane). The alcohol fraction was converted to trimethylsiloxyl derivatives by bis (trimethylsilyl) trifluoroacetamide (BSTFA with 1 percent TMCS) heated at 60 degrees C for 1 hour followed by evaporation to remove derivatizing chemicals and brought up to a final volume of 500 microliter with Optima hexane prior to GC–MS analysis. Extracts were analyzed by splitless injection onto an Agilent 8890 gas chromatograph interfaced to an Agilent 7000D triple quad mass spectrometer. The gas chromatograph oven program had an initial temperature of 90 degrees C for 4.0 minutes then ramped up to a final temperature of 310 degrees C for 10 minutes. The capillary column (alkanes and sterols: DB-5MS: 30 meter length, 0.25 millimeter id with a 25 micron phase thickness) was directly interfaced to the ion source of the mass spectrometer. Hexane instrument blanks, extraction blanks, and procedural sample duplicates were run and analyzed every 10 samples. 5- and 6- point calibration curves (fatty alcohols/sterols and n-alkanes, respectively) were analyzed and used for calculating concentrations. Compound identification was through individual standard spectra (when available), published reference spectra and by relative retention times and elution order. Concentrations of individual lipids were determined based on peak area in relation to internal and external standards; reported concentrations are blank corrected and normalized to both dry weight and percent organic carbon.
  3. What similar or related data should the user be aware of?
    Prouty, NG, 2023, Geochemistry of authigenic carbonates from Cascadia Margin..

    Online Links:

    • doi:10.5066/P9J10NH5

    Other_Citation_Details: USGS Data Release

How reliable are the data; what problems remain in the data set?

  1. How well have the observations been checked?
    All geochemical data were calibrated and identified by know standards or mass spectra. Standard deviation (SD) for duplicates of individual biomarker (n-alkane and sterol) compounds was generally less than 15 percent.
  2. How accurate are the geographic locations?
    A formal accuracy assessment of the horizontal positional information in the data set has not been conducted. The horizontal accuracy is based on ship's position using the global navigation satellite systems (GNSS) CNAV with an accuracy of 1 m.
  3. How accurate are the heights or depths?
    A formal accuracy assessment of the vertical positional information in the data set has not been conducted. Depth was determined using a Valeport minilPS depth sensor with a factory determined accuracy of 0.01 percent.
  4. Where are the gaps in the data? What is missing?
    Dataset is considered complete for the information presented, as described in the abstract. Users are advised to read the rest of the metadata record carefully for additional details.
  5. How consistent are the relationships among the observations, including topology?
    No formal logical consistency tests were conducted.

How can someone get a copy of the data set?

Are there legal restrictions on access or use of the data?
Access_Constraints No access constraints
Use_Constraints USGS-authored or produced data and information are in the public domain from the U.S. Government and are freely redistributable with proper metadata and source attribution. Please recognize and acknowledge the U.S. Geological Survey as the originator(s) of the dataset and in products derived from these data.
  1. Who distributes the data set? (Distributor 1 of 1)
    U.S. Geological Survey - ScienceBase
    Denver Federal Center, Building 810, Mail Stop 302
    Denver, CO

    1-888-275-8747 (voice)
    sciencebase@usgs.gov
  2. What's the catalog number I need to order this data set? Carbonate lipid biomarkers data was combined into a single document (FK109612_carbonate_data.csv).
  3. What legal disclaimers am I supposed to read?
    Unless otherwise stated, all data, metadata and related materials are considered to satisfy the quality standards relative to the purpose for which the data were collected. Although these data and associated metadata have been reviewed for accuracy and completeness and approved for release by the U.S. Geological Survey (USGS), no warranty expressed or implied is made regarding the display or utility of the data on any other system or for general or scientific purposes, nor shall the act of distribution constitute any such warranty.
  4. How can I download or order the data?
  5. What hardware or software do I need in order to use the data set?
    These data can be viewed with any text reader.

Who wrote the metadata?

Dates:
Last modified: 21-Nov-2024
Metadata author:
U.S. Geological Survey, Pacific Coastal and Marine Science Center
Attn: PCMSC Science Data Coordinator
2885 Mission Street
Santa Cruz, CA

831-427-4747 (voice)
pcmsc_data@usgs.gov
Metadata standard:
Content Standard for Digital Geospatial Metadata (FGDC-STD-001-1998)
This page is <https://cmgds.marine.usgs.gov/catalog/pcmsc/DataReleases/ScienceBase/DR_P1VR2IYU/FK190612_carbonate_metadata.faq.html>
Generated by mp version 2.9.51 on Fri Nov 22 11:55:24 2024