Dataset: Stable C and O isotopes for Guaymas Basin and Sonora Margin sediments
Deployment: Guaymas_2014

d13C and d18O isotopic data for carbonate nodules and sedimentary carbonates in Guaymas Basin and Sonora Margin sediments

Principal Investigator:

Andreas Teske (University of North Carolina at Chapel Hill, UNC-Chapel Hill)

Co-Principal Investigator:

Ana Christina Ravelo (University of California-Santa Cruz, UCSC)

Contact:

Ana Christina Ravelo (University of California-Santa Cruz, UCSC)

BCO-DMO Data Manager:

Shannon Rauch (Woods Hole Oceanographic Institution, WHOI BCO-DMO)

Project:

RAPID proposal: Site characterization cruise to document the active and extensive subsurface biosphere in the Guaymas Basin (RAPID Guaymas Basin)

Current State:

Final no updates expected

Data URL:

https://www.bco-dmo.org/dataset-deployment/763852/data

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Description

d13C and d18O isotopic data for carbonate nodules and sedimentary carbonates in Guaymas Basin and Sonora Margin sediments collected from R/V El Puma (the Pacific Coast research vessel of the Autonomous University of Mexico) from October 14, 2014 to October 27, 2014.

Data for each core include: sample identification (core No., section number, cm within section, sample type), total sediment depth in cm, and d¹³C isotopic composition in permille. background = sediment around the nodule.

Methods & Sampling

Dataset acquisition description

Sediment cores were obtained by Piston coring (using commercial PVC core liners) onboard R/V El Puma. Samples selected for carbonate isotope analyses were freeze-dried, homogenized, and roasted under vacuum to eliminate organic matter. Isotope analyses was performed on ~500 µg of sediment using a Kiel devise coupled with a Thermo MAT 253 gas ratio mass spectrometer at the University of California, Santa Cruz. Values are reported in the per mil (‰) notation relative to Vienna Pee Dee Belemnite (VPDB). Reproducibility of in-house standards is 0.07‰ for 18O and 0.03‰ for 13C.

Data Processing Description

Dataset Processing Description

BCO-DMO Processing:
- modified column headers (replaced spaces with underscores, renamed standard deviation columns for clarity);
- replaced "n.d." with "nd" ("no data").

More information about this dataset deployment

Funding

Award Number	Funding Source
OCE-0939564	NSF Division of Ocean Sciences
OCE-1449604	NSF Division of Ocean Sciences

Instruments

Isotope-ratio Mass Spectrometer

Supplied Name: Thermo MAT 253

Supplied Description:

Isotope analyses was performed on ~500 µg of sediment using a Kiel devise coupled with a Thermo MAT 253 gas ratio mass spectrometer at the University of California, Santa Cruz.

Instrument Type

Generic Name: Isotope-ratio Mass Spectrometer

Acronym: IR Mass Spec; IRMS

Community Identifier: http://vocab.nerc.ac.uk/collection/L05/current/LAB16/

Generic Description:

The Isotope-ratio Mass Spectrometer is a particular type of mass spectrometer used to measure the relative abundance of isotopes in a given sample (e.g. VG Prism II Isotope Ratio Mass-Spectrometer).

Piston Corer

Supplied Name:

Supplied Description:

Instrument Type

Generic Name: Piston Corer

Community Identifier: http://vocab.nerc.ac.uk/collection/L05/current/51/

Generic Description:

The piston corer is a type of bottom sediment sampling device. A long, heavy tube is plunged into the seafloor to extract samples of mud sediment. A piston corer uses a "free fall" of the coring rig to achieve a greater initial force on impact than gravity coring. A sliding piston inside the core barrel reduces inside wall friction with the sediment and helps to evacuate displaced water from the top of the corer. A piston corer is capable of extracting core samples up to 90 feet in length.

Parameters

Supplied Name	Supplied description	Supplied Units	Standard Name
Core_section_cm	Sample identification (core number, section number, cm within section)	unitless	sample
cm_in_core	Total sediment depth in centimeters	centimeters (cm)	depth_core
sample_type	Description of sample type	unitless	sample_type
d13C	d13C stable isotope values reported in per mil (‰) notation relative to Vienna Pee Dee Belemnite (VPDB)	per mil (‰)	d13C
d13C_stdev	Standard deviation of d13C	per mil (‰)	d13C
d18O	d18O stable isotope values reported in per mil (‰) notation relative to Vienna Pee Dee Belemnite (VPDB)	per mil (‰)	delta18O
d18O_stdev	Standard deviation of d18O	per mil (‰)	delta18O

Database

Contribute Data

Dataset: Stable C and O isotopes for Guaymas Basin and Sonora Margin sediments
Deployment: Guaymas_2014

Dataset acquisition description

Dataset Processing Description

Database

Contribute Data

Dataset: Stable C and O isotopes for Guaymas Basin and Sonora Margin sedimentsDeployment: Guaymas_2014

Dataset acquisition description

Dataset Processing Description

Dataset: Stable C and O isotopes for Guaymas Basin and Sonora Margin sediments
Deployment: Guaymas_2014