Dataset: Dorado 2014: Chemical composition of discrete hydrothermal syringe samples
Deployment: AT26-24

Chemistry from discrete samples of hydrothermal springs

Principal Investigator:

C. Geoffrey Wheat (University of Alaska Fairbanks, UAF)

Co-Principal Investigator:

Andrew Fisher (University of California-Santa Cruz, UCSC)

Samuel Hulme (Moss Landing Marine Laboratories, MLML)

James McManus (University of Akron, UAkron)

Beth N. Orcutt (Bigelow Laboratory for Ocean Sciences)

Contact:

C. Geoffrey Wheat (University of Alaska Fairbanks, UAF)

BCO-DMO Data Manager:

Amber D. York (Woods Hole Oceanographic Institution, WHOI BCO-DMO)

Project:

Discovery, sampling, and quantification of flows from cool yet massive ridge-flank hydrothermal springs on Dorado Outcrop, eastern Pacific Ocean (Dorado Outcrop)

Current State:

Preliminary and in progress

Data URL:

https://www.bco-dmo.org/dataset-deployment/664465/data

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Description

This dataset contains chemistry from discrete hydrothermal water samples collected by syringe. Dissolved inorganic carbon (DIC), stable carbon isotope ratio (d13C), stable carbon isotope ratio of dissolved inorganic carbon (13C/12C ratio in DIC), alkalinity, chlorinity, the concentration of nitrate plus nitrite, and pH are included in the data. Concentrations of the following elements and compounds are also included; Mo, V, Rb, Cs, U, PO4, silicic acid, Sr, Li, S, Na, Ca, Mg, K, B, Mn, Fe. Latitude, longitude, and date of the Alvin dives that collected these data are also included. Collection occurred during the R/V Atlantis cruise AT26-24.

Methods & Sampling

Dataset acquisition description

Syringe samples of hydrothermal water were collected during Alvin dives.

The Alvin dives were conducted off the west coast of Costa Rica in the Pacific Ocean at Dorado Outcrop during the R/V Atlantis cruise AT26-24. For more information about operations of this cruise see the cruise pages which contain links to cruise reports (AT26-24)

Chemical Measurements:

All fluids were measured using established standard protocols. At sea, alkalinity was determined potentiometrically via titration with 0.1N hydrochloric acid; a pH measurement is conducted as part of this procedure. An Inductively Coupled Plasma Optical Emission Spectrophotometer (ICPOES) was used to measure Na, K, Sr, Li, Mg, Ca, and S with a 1:200 dilution and Sr, Li, Fe, Mn, and B with a 1:25 dilution in 1% nitric acid. An inductively coupled plasma mass spectrometry (ICP-MS) was used to analyze Rb, Cs, Ba, Mo, V and U with a 1:75 dilution in 3% nitric acid. Nutrients (silicate, phosphate, total nitrogen and nitrate) were measured at Oregon State University using standard colorimetric, automated, segmented flow procedures. Chlorinity was determined potentiometrically via titration with silver nitrate. Carbon analyses were conducted at Oregon State University

Data Processing Description

Dataset Processing Description

The data have not been processed further.

BCO-DMO Processing Notes:

* added a conventional header with dataset name, PI name, version date
* modified parameter names to conform with BCO-DMO naming conventions
* added lat, lon, and date of Alvin dives as listed in the Alvin Dive Log

More information about this dataset deployment

Funding

Award Number	Funding Source
OCE-1131210	NSF Division of Ocean Sciences
OCE-1130146	NSF Division of Ocean Sciences

Instruments

Discrete water sampler

Supplied Name: syringe sample taken by Alvin

Supplied Description:

Instrument Type

Generic Name: Discrete water sampler

Generic Description:

A device that collects an in-situ discrete water sample from any depth and returns it to the surface without contamination by the waters through which it passes, such as a water bottle.

Inductively Coupled Plasma Mass Spectrometer

Supplied Name: inductively coupled plasma mass spectrometry (ICP-MS)

Supplied Description:

Instrument Type

Generic Name: Inductively Coupled Plasma Mass Spectrometer

Acronym: ICP Mass Spec

Community Identifier: http://vocab.nerc.ac.uk/collection/L05/current/LAB15/

Generic Description:

An ICP Mass Spec is an instrument that passes nebulized samples into an inductively-coupled gas plasma (8-10000 K) where they are atomized and ionized. Ions of specific mass-to-charge ratios are quantified in a quadrupole mass spectrometer.

Inductively Coupled Plasma Optical Emission Spectrometer

Supplied Name: Inductively Coupled Plasma Optical Emission Spectrophotometer (ICPOES)

Supplied Description:

Instrument Type

Generic Name: Inductively Coupled Plasma Optical Emission Spectrometer

Acronym: ICP-OES or ICP-AES

Generic Description:

Also referred to as an Inductively coupled plasma atomic emission spectroscope (ICP-AES). These instruments pass nebulised samples into an inductively-coupled gas plasma (8-10000 K) where they are atomised and excited. The de-excitation optical emissions at characteristic wavelengths are spectroscopically analysed. It is often used in the detection of trace metals.

Parameters

Supplied Name	Supplied description	Supplied Units	Standard Name
alkalinity	Alkalinity	millimoles per kilogram (umol/Kg)	TALK
B	Boron concentration	micromoles per kilogram (umol/Kg)	B
Ca	Cadmium concentration	millimoles per kilogram (umol/Kg)	Ca
chlorinity	Chlorinity	millimoles per kilogram (umol/Kg)	chlorinity
Cs	Cesium concentration	nanomoles per kilogram (nmol/Kg)	Cs
DIC	Dissolved inorganic carbon using Pee Dee Belemnite (PDB) standard	permil (0/00)	DIC
DIC_d13C	Stable carbon isotope ratio of dissolved inorganic carbon (13C:12C ratio in DIC) using the Pee Dee Belemnite (PDB) standard	permil (0/00)	d13C_DIC
DIC_d13C_stdev	Standard deviation of stable carbon isotope ratio of dissolved inorganic carbon (13C:12C ratio in DIC) using the Pee Dee Belemnite (PDB) standard	permil (0/00)	d13C_DIC
DIC_stdev	Standard deviation of dissolved inorganic carbon using the Pee Dee Belemnite (PDB) standard	permil (0/00)	DIC
dive_date	Alvin submersible dive date in format yyyy-mm-dd	unitless	date
dive_id	Alvin submersible dive identifier	unitless	dive_id
dive_lat	Alvin submersible dive latitude; north is positive	decimal degrees	lat
dive_lon	Alvin submersible dive longitude; east is positive	decimal degrees	lon
Fe	Iron concentration	micromoles per kilogram (umol/Kg)	Fe
K	Potassium concentration	millimoles per kilogram (umol/Kg)	K
Li	Lithium concentration	micromoles per kilogram (umol/Kg)	Li
Mg	Magnesium concentration	millimoles per kilogram (umol/Kg)	Mg
Mn	Manganese concentration	micromoles per kilogram (umol/Kg)	Mn
Mo	Molybdenum concentration	nanomoles per kilogram (nmol/Kg)	Mo
Na	Sodium concentration	millimoles per kilogram (umol/Kg)	Na
N_plus_N	Nitrate plus Nitrite concentration	micromolar (uM)	NO3_NO2
pH	pH	pH scale	pH
PO4	Phosphate concentration	micromolar (uM)	trace_metal_conc
Rb	Rubidium concentration	nanomoles per kilogram (nmol/Kg)	Rb
S	Sulfur concentration	millimoles per kilogram (umol/Kg)	trace_element_conc
sample_id	Sample identifier	unitless	sample
silicic_acid	Silicic acid concentration	micromolar (uM)	Silicate
Sr	Strontium concentration	micromoles per kilogram (umol/Kg)	Sr
U	Uranium concentration	nanomoles per kilogram (nmol/Kg)	U
V	Vanadium concentration	nanomoles per kilogram (nmol/Kg)	V

Database

Contribute Data

Dataset: Dorado 2014: Chemical composition of discrete hydrothermal syringe samples
Deployment: AT26-24

Dataset acquisition description

Dataset Processing Description

Database

Contribute Data

Dataset: Dorado 2014: Chemical composition of discrete hydrothermal syringe samplesDeployment: AT26-24

Dataset acquisition description

Dataset Processing Description

Dataset: Dorado 2014: Chemical composition of discrete hydrothermal syringe samples
Deployment: AT26-24