Dataset: Guaymas Basin 2014 Organic Matter C:N Ratio

Name: Organic matter C:N ratios from sediment cores collected on the Guaymas Basin Ridge flanks and the Sonora Margin from R/V El Puma during October 2014
Published: 2019-12-12
Keywords: oceans

Cite This Dataset

DOI:10.1575/1912/bco-dmo.784337.1

Spatial Extent: N:27.86855 E:-111.22955 S:27.20745 W:-111.70287

Temporal Extent: 2014-10-19 - 2014-10-22

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)

Program:

Center for Dark Energy Biosphere Investigations (C-DEBI)

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)

Version:

Version Date:

2019-12-12

Restricted:

Validated:

Yes

Current State:

Final no updates expected

Organic matter C:N ratios from sediment cores collected on the Guaymas Basin Ridge flanks and the Sonora Margin from R/V El Puma during October 2014

Abstract:

Organic matter C:N ratios 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.

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Archival Copy

Version Date	Archive	Persistent Identifier	Date Assigned
2019-12-12	Marine Biological Laboratory/Woods Hole Oceanographic Institution Library (MBLWHOI DLA)	10.1575/1912/bco-dmo.784337.1	2020-02-11

Description

Methods & Sampling

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

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

Data Files

File
C_to_N_ratio.csv (Comma Separated Values (.csv), 3.62 KB) MD5:dbd7d531ad4d3a2abb5ef4628f5b2bec Primary data file for dataset ID 784337

More Information about this dataset

Funding Sources

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

Deployments

Deployment	Synonyms	Start Date	Platform	Investigator
Guaymas_2014		2014-10-14	R/V El Puma	Andreas Teske (Principal Investigator)	data info

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

Date and time formats are described in python strftime() syntax.

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
CtoN_ratio	Ratio of organic matter C to N	unitless	C_to_N
date	Sample date. Format: yyyy-mm-dd	unitless	date