Dataset: POC
Deployment: MSM20-5

Particulate organic carbon from the formation fluids recovered from the CORKs installed at the North Pond in 2012

Principal Investigator:

Peter Girguis (Harvard University)

Co-Principal Investigator:

Brian Glazer (University of Hawaiʻi at Mānoa, SOEST)

Julie Huber (Marine Biological Laboratory, MBL)

Contact:

Beate Kraft (Harvard University)

BCO-DMO Data Manager:

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

Project:

Collaborative Research: Characterization of Microbial Transformations in Basement Fluids, from Genes to Geochemical Cycling (North Pond Microbes)

Version:

30 Dec 2015

Deployment Synonyms:

MSM20/5, MSM-20-5, BSH20120078

Version Date:

2015-12-30

Data URL:

https://osprey.bco-dmo.org/dataset-deployment/630339/data

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Description

Particulate organic carbon (POC) from the formation fluids recovered from the CORKs installed at the North Pond in 2012 on MSM20-5. The North Pond is an isolated, northeast-trending, ~8 km × 15 km sediment pond located on the western flank of the Mid-Atlantic Ridge (MAR) at 22°45' N and 46°05' W.

Details of these CORKS and their positions, construction and depth can be found in the Proceedings of the IODP expedition 336. See: http://publications.iodp.org/scientific_prospectus/336/336sp_6.htm

In addition to NSF OCE-1061934 (to Girguis), this dataset was funded by C-DEBI (OCE-0939564) sub-award number 41940192 granted to Beate Kraft.

Methods & Sampling

Dataset acquisition description

Carbon and nitrogen concentrations of particulate organic matter were measured by the Biogeochemical Stable Isotope Facility at School of Ocean and Earth Science and Technology, University of Hawaii. A few drops of sulfurous acid (6-9 % of H2SO3) were added to wet the filter and to remove inorganic carbon from the filter. The acidified filters were transferred to a 60 degree C oven for 24 hours. The dried filters were then transferred into a tin capsule before placing within a high temperature combustion CN elemental analyzer (Costech, ECS 4010) connected in-line with a Mass Spectrometer (ThermoFinnigan Delta XP interfaced with a ConFloIV) for analysis of their organic carbon and nitrogen isotopic compositions. The detection limit for carbon and nitrogen content is 10 ug-C and 0.3 ug-N, respectively. The limit for reliable carbon and nitrogen isotopic determination is 10 ug-C and 10 ug-N, respectively.

Data Processing Description

Dataset Processing Description

BCO-DMO Processing:
- Modified parameter names to conform with BCO-DMO naming conventions;
- Replaced "n.a." with "nd" to indicate "no data";
- Replaced "u.d." with "bel_det" to indiacte "below detection";
- Replaced commas with semi-colons;
- Replaced spaces with underscores;
- Added cruise id numbers.

More information about this dataset deployment

Funding

Award Number	Funding Source
OCE-0939564	NSF Division of Ocean Sciences
OCE-1061934	NSF Division of Ocean Sciences

Instruments

Elemental Analyzer

Supplied Name: Costech, ECS 4010

Supplied Description:

The dried filters were then transferred into a tin capsule before placing within a high temperature combustion CN elemental analyzer (Costech, ECS 4010) connected in-line with a Mass Spectrometer (ThermoFinnigan Delta XP interfaced with a ConFloIV) for analysis of their organic carbon and nitrogen isotopic compositions.

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.

Mass Spectrometer

Supplied Name: ThermoFinnigan Delta XP

Supplied Description:

Instrument Type

Generic Name: Mass Spectrometer

Acronym: Mass Spec

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

Generic Description:

General term for instruments used to measure the mass-to-charge ratio of ions; generally used to find the composition of a sample by generating a mass spectrum representing the masses of sample components.

Parameters

Supplied Name	Supplied description	Supplied Units	Standard Name
site	Sampling site name. The nomenclature refers to the IODP hole and formation horizon. For example, U1383C-shallow means the fluids came from IODP CORK drillhole 1383C in the shallowest accessible porewater horizon.	dimensionless	site
cruise_id	Cruise identifier.	dimensionless	cruise_id
dive_num	Dive number.	dimensionless	no_bcodmo_term
method	Sampling method.	dimensionless	no_bcodmo_term
PN_ug	Particulate nitrogen.	micrograms (ug)	no_bcodmo_term
del15N	delta 15N	per mille vs air (‰)	no_bcodmo_term
OC	Organic Carbon (?)	micrograms (ug)	no_bcodmo_term
del13C	delta 13C	per mille (‰) vs VPDB	delta13C
vol_filt	Volume filtered.	milliliters (mL)	vol_filt
POC	Particulate organic carbon.	micromoles per Liter (umol/L)	POC
PN_umolL	Particulate nitrogen.	micromoles per Liter (umol/L)	no_bcodmo_term
C_to_N	Molar ratio of carbon to nitrogen.	Molar ratio C/N	C_to_N
fraction_C	1/C	1/micrograms (1/ug)	no_bcodmo_term

Database

Contribute Data

Dataset: POC
Deployment: MSM20-5

Dataset acquisition description

Dataset Processing Description

Database

Contribute Data

Dataset: POCDeployment: MSM20-5

Dataset acquisition description

Dataset Processing Description

Dataset: POC
Deployment: MSM20-5