Dataset: RR1507 Vent Fluid Chemistry

Name: Chemical composition of hydrothermal fluids collected on RV/Roger Revelle RR1507 in the Eastern Lau Spreading Center and Valu Fa Ridge, April-May 2015 (Functional microbial dynamics of vent deposits project)
Published: 2017-01-13
Keywords: oceans

Cite This Dataset

Spatial Extent: N:-20.45669 E:-176.133725 S:-22.2157 W:-176.608612

Temporal Extent: 2015-04-26 - 2015-05-10

Project:

Geochemical effects on the functional microbial community dynamics of hyrothermal deposits along the Eastern Lau Spreading Center (Functional microbial dynamics of vent deposits)

Principal Investigator:

Jeffrey S. Seewald (Woods Hole Oceanographic Institution, WHOI)

BCO-DMO Data Manager:

Nancy Copley (Woods Hole Oceanographic Institution, WHOI BCO-DMO)

Version:

Version Date:

2017-01-13

Restricted:

Validated:

Current State:

Preliminary and in progress

Chemical composition of hydrothermal fluids collected on RV/Roger Revelle RR1507 in the Eastern Lau Spreading Center and Valu Fa Ridge, April-May 2015 (Functional microbial dynamics of vent deposits project)

Abstract:

This dataset is the chemical composition of hydrothermal fluids collected during RV\Roger Revelle cruise RR1507 at the 9ºN deep-sea hydrothermal vent field on the East Pacific Rise, Pacific Ocean, April - May 2015.

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Methods & Sampling

- All fluids were collected using isobaric gas-tight fluid samplers (Seewald et al., 2002).
- Temperature was measured during sample collection using a type-J thermocouple attached to the inlet snorkel. Reported values are maximums observed during sample collection.

Analytical methods:
pH: Ag/AgCl combination reference electrode
Na+, K+, Ca2+, Mg2+, Cl-, Br-, SO42- : ion chromatography with suppressed conductivity detectionCH4: gas chromatography with flame ionization detection
H2: gas chromatography with thermal conductivity detection

Data Processing Description

BCO-DMO Processing:
- Added conventional header with dataset name, PI name, version date
- Modified parameter names to conform with BCO-DMO naming conventions
- Replaced blanks (missing data) and 'nd' to indicate 'no data'
- Added cruise_id column
- Replaced spaces with underscores (vent_site)
- Changed format of lat and lon to degrees north and east

Data Files

File
vent_fluid_chemistry_RR1507.csv (Comma Separated Values (.csv), 5.48 KB) MD5:c7eccaaabe212614fe5e6851ebd15ff1 Primary data file for dataset ID 674750

More Information about this dataset

Funding Sources

Funding Source	Award Number
NSF Division of Ocean Sciences	OCE-1233037

Deployments

Deployment	Synonyms	Start Date	Platform	Investigator
RR1507		2015-04-21	R/V Roger Revelle	Anna-Louise Reysenbach (Chief Scientist) Jeffrey S. Seewald (Co-Chief Scientist)	data info

Instruments

Isobaric Gas-Tight Sampler

Supplied Name:

Supplied Description:

Used for sample collection.

Instrument Type

Generic Name: Isobaric Gas-Tight Sampler

Acronym: IGT Sampler

Generic Description:

Isobaric Gas Tight (IGT) samplers, designed and built by scientists and engineers at WHOI, are titanium instruments designed to be used with deep submergence vehicles to sample corrosive hydrothermal vent fluids at high temperature and high pressure. The IGT prevents the sampled fluid from degassing as pressure decreases during the vehicle’s ascent to the surface.

ROV Jason

Supplied Description:

Instrument Type

Generic Name: ROV Jason

Generic Description:

The Remotely Operated Vehicle (ROV) Jason is operated by the Deep Submergence Laboratory (DSL) at Woods Hole Oceanographic Institution (WHOI). WHOI engineers and scientists designed and built the ROV Jason to give scientists access to the seafloor that didn't require them leaving the deck of the ship. Jason is a two-body ROV system. A 10-kilometer (6-mile) fiber-optic cable delivers electrical power and commands from the ship through Medea and down to Jason, which then returns data and live video imagery. Medea serves as a shock absorber, buffering Jason from the movements of the ship, while providing lighting and a bird’s eye view of the ROV during seafloor operations. During each dive (deployment of the ROV), Jason pilots and scientists work from a control room on the ship to monitor Jason’s instruments and video while maneuvering the vehicle and optionally performing a variety of sampling activities. Jason is equipped with sonar imagers, water samplers, video and still cameras, and lighting gear. Jason’s manipulator arms collect samples of rock, sediment, or marine life and place them in the vehicle’s basket or on "elevator" platforms that float heavier loads to the surface. More information is available from the operator site at URL.

Water Temperature Sensor

Supplied Name: type-J thermocouple attached to the inlet snorkel

Supplied Description:

Used to measure in-situ temperature.

Instrument Type

Generic Name: Water Temperature Sensor

Acronym: Water Temp Sensor

Community Identifier: http://vocab.nerc.ac.uk/collection/L05/current/134/

Generic Description:

General term for an instrument that measures the temperature of the water with which it is in contact (thermometer).

Parameters

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

Supplied Name	Supplied description	Supplied Units	Standard Name
cruise_id	cruise identifier	unitless	cruise_id
vent_site	vent site name	unitless	site
sample_working_ID	working id for sample	unitless	sample
sample_Jason_Virtual_Van_ID	Jason Virtual Van sample identifer	unitless	sample
vent_id	vent identifier	unitless	site
temp	temperature	degrees Celsius	temp
pH_25C	pH at 25 degrees C	unitless	pH
Mg_mmol_kg	Magnesium concentration	millimoles/kilogram (mmol/kg)	Mg
Na_mmol_kg	Sodium	millimoles/kilogram (mmol/kg)	Na
K_mmol_kg	Potassium	millimoles/kilogram (mmol/kg)	K
Li_umol_kg	Lithium	micromoles/kilogram (umol/kg)	Li
Ca_mmol_kg	Calcium	millimoles/kilogram (mmol/kg)	Ca
H2S_mmol_L	Hydrogen sulfide	micromoles/kilogram (umol/kg)	sulfide
CH4_umol_L	Methane	micromoles/kilogram (umol/kg)	CH4
lat	latitude; north is positive	degrees	lat
lon	longitude; east is positive	degrees	lon
HDG	? Heading; north is 0 or 360	?radial degrees	no_bcodmo_term
depth	sample depth	meters	depth

Status message

Database

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Dataset: RR1507 Vent Fluid Chemistry