Dataset: Guaymas Basin 2014 Organic Matter del15N
Deployment: Guaymas_2014

delta 15N values from sediment cores P6, P10, P11, P12, and P13, collected on the Guaymas Basin Ridge flanks and the Sonora Margin

Principal Investigator:

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

Co-Principal Investigator:

Ivano Aiello (Moss Landing Marine Laboratories, MLML)

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

BCO-DMO Data Manager:

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

Project:

Characterizing subseafloor life and environments in the Guaymas Basin (C-DEBI Guaymas Subseafloor Life)

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

Data URL:

https://www.bco-dmo.org/dataset-deployment/784257/data

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Description

delta 15N values from sediment cores P6, P10, P11, P12, and P13, collected on the Guaymas Basin Ridge flanks and the Sonora Margin. Sediment cores were collected from R/V El Puma, the Pacific Coast research vessel of the Autonomous University of Mexico, leaving Guaymas on October 14, 2014, and heading to Mazatlan on October 27, 2014.

Methods & Sampling

Dataset acquisition description

All coring operations were performed using a the piston-coring system onboard the R/V El Puma. See http://www.buques.unam.mx for additional information.

Bulk sediment δ¹⁵N and elemental ratio data were collected using 20mg samples in Sn capsules; organic δ¹³C and elemental composition data were collected using 2.5mg samples of acidified sediment in Sn capsules. All samples were measured by Dumas combustion performed on a Carlo Erba 1108 elemental analyzer coupled to a ThermoFinnigan Delt Plus XP isotope ratio mass spectrometer (EA-IRMS). An in-house gelatin standard, Acetanilide, and an in-house bulk sediment standard, "Monterey Bay Sediment Standard", were used in all runs. Reproducibility of an in-house matrix-matched sediment standard is <0.1‰ VPDB for δ¹³C and <0.2‰ AIR for δ¹⁵N. Data is corrected for blank, and for drift when appropriate. Carbon and nitrogen elemental composition was estimated based on standards of known composition, for which analytical precision is determined to be better than 1%.

Data Processing Description

Dataset Processing Description

BCO-DMO Processing:
- modified parameter names (removed units in parens);
- added dates provided by submitter.

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

Elemental Analyzer

Supplied Name: Carlo Erba 1108 elemental analyzer

Supplied Description:

Instrument Type

Generic Name: Elemental Analyzer

Community Identifier: http://vocab.nerc.ac.uk/collection/L05/current/LAB01/

Generic Description:

Instruments that quantify carbon, nitrogen and sometimes other elements by combusting the sample at very high temperature and assaying the resulting gaseous oxides. Usually used for samples including organic material.

Isotope-ratio Mass Spectrometer

Supplied Name: ThermoFinnigan Delt Plus XP isotope ratio mass spectrometer (EA-IRMS)

Supplied Description:

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).

Parameters

Supplied Name	Supplied description	Supplied Units	Standard Name
core	Core identifier	unitless	core_id
lat	Latitude at sampling location; positive = north	decimal degrees	lat
long	Longitude at sampling location; negative = west	decimal degrees	lon
depth_water	Water depth at sampling location	meters (m)	depth_w
core_sample	Identifier for the core sample	unitless	sample
depth_cmbsf	Depth in centimeters below seafloor	centimeters (cm)	depth_bsf
Orgmatter_del15N	del15N values for organic matter	per thousand	d15N
date	Sample date. Format: yyyy-mm-dd	unitless	date

Database

Contribute Data

Dataset: Guaymas Basin 2014 Organic Matter del15N
Deployment: Guaymas_2014

Dataset acquisition description

Dataset Processing Description

Database

Contribute Data

Dataset: Guaymas Basin 2014 Organic Matter del15NDeployment: Guaymas_2014

Dataset acquisition description

Dataset Processing Description

Dataset: Guaymas Basin 2014 Organic Matter del15N
Deployment: Guaymas_2014