Dataset: GP16 Dissolved REEs

Name: Dissolved REE concentrations and Nd isotopes from the GEOTRACES EPZT R/V Thomas G. Thompson cruise TN303 from November to December 2013
Published: 2020-01-23
License: https://creativecommons.org/licenses/by/4.0/
Keywords: oceans

Cite This Dataset

DOI:10.1575/1912/bco-dmo.788195.1

Spatial Extent: N:-10.7652 E:282.62201 S:-15.0003 W:212.49899

Temporal Extent: 2013-11-01 - 2013-12-14

Project:

U.S. GEOTRACES East Pacific Zonal Transect (U.S. GEOTRACES EPZT)

Collaborative Research: GEOTRACES Pacific Section - Nd isotopes and REEs in the South Pacific (EPZT Nd REEs)

Program:

U.S. GEOTRACES (U.S. GEOTRACES)

Principal Investigator:

Brian Haley (Oregon State University, OSU)

Co-Principal Investigator:

Steven L. Goldstein (Lamont-Doherty Earth Observatory, LDEO)

Contact:

Brian Haley (Oregon State University, OSU)

BCO-DMO Data Manager:

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

Version:

Version Date:

2020-01-23

Restricted:

Validated:

Yes

Current State:

Final no updates expected

Data URL:

https://www.bco-dmo.org/dataset/788195/data

Dissolved REE concentrations and Nd isotopes from the GEOTRACES EPZT R/V Thomas G. Thompson cruise TN303 from November to December 2013

Abstract:

Dissolved REE concentrations and Nd isotopes from the GEOTRACES EPZT R/V Thomas G. Thompson cruise TN303 from November to December 2013.

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Archival Copy

Version Date	Archive	Persistent Identifier	Date Assigned
2020-01-23	Marine Biological Laboratory/Woods Hole Oceanographic Institution Library (MBLWHOI DLA)	10.1575/1912/bco-dmo.788195.1	2020-02-11

Acquisition Description

Samples were filtered, acidified, and split at sea. Samples were collected by Niskin bottle and the towed GeoFish. Refer to the EPZT cruise report for more information on cruise operations (http://dmoserv3.whoi.edu/data_docs/GEOTRACES/EPZT/GT13_EPZT_ODFReport_All.pdf).

We prepared our 5L split for neodymium isotopic analysis following Shabani et al. (1992). Samples were pH-adjusted to pH ~3.5, then pumped through 300 µl of HDEHP in a C18 cartridge to capture REEs. Rare earth elements were eluted from the cartridge using 6M HCl, then Nd was isolated using sequential chromatographic columns: AG50-X8 (BioRad) and Ln-Spec (Eichrom). Neodymium isotopic measurements were made at Lamont-Doherty Earth Observatory (Palisades, NY) using a Thermo Neptune multicollector ICP-MS.

For REE concentrations we removed an aliquot after pH-adjustment of each sample. Sample methodology is described in Behrens et al. (2006), as Lab #3. We preconcentrated 20 ml of sample offline using a SeaFast PICO system (ESI), then analysed the resulting solution at Oregon State University (Corvallis, OR) using a Thermo X-Series II ICP-MS.

Problem Report: Cerium measurements yielded questionable data during a couple of run days, these data are indicated using IODE quality flag 3– Questionable Data. Sample gaps in REE concentrations are due to analytical error during pre-concentration, sample gaps in Nd isotope data are due to insufficient quantity of Nd to make a measurement.

Processing Description

Neodymium isotope ratios were corrected using JNdi-1 standard for reference (Tanaka et al., 2000). Dissolved concentrations were determined by external calibration. Calibration standards were diluted by weight and pre-concentrated using the same method as the samples. To account for evaporation we included pre-concentrations of an in-house REE consistency standard at regular intervals. Validation of the correction was done by additional pre-concentrations and measurements of two in-house seawater samples, one from Bransfeld Strait (~1100m depth) and one from nearshore California (~surface depth).

IODE Quality Flag Codes:
Good quality = 1
Not evaluated, not available, or unknown quality = 2
Questionable/suspect quality = 3
Bad quality = 4
Missing data = 9

More Information about this dataset

Funding Sources

Funding Source	Award Number
NSF Division of Ocean Sciences	OCE-1234191

Deployments

Deployment	Synonyms	Start Date	Platform	Investigator
TN303	GEOTRACES EPZT GEOTRACES East Pacific Zonal Transect (EPZT) GT13 325020131025 GP16	2013-10-25	R/V Thomas G. Thompson	James W. Moffett (Chief Scientist) Gregory Cutter (Co-Chief Scientist) Christopher R. German (Co-Chief Scientist)	data info

Instruments

GeoFish Towed near-Surface Sampler

(more info)

Short Name: GeoFish

Community Standard Description

Generic Description

The GeoFish towed sampler is a custom designed near surface (<2m) sampling system for the collection of trace metal clean seawater. It consists of a PVC encapsulated lead weighted torpedo and separate PVC depressor vane supporting the intake utilizing all PFA Teflon tubing connected to a deck mounted, air-driven, PFA Teflon dual-diaphragm pump which provides trace-metal clean seawater at up to 3.7L/min. The GeoFish is towed at up to 13kts off to the side of the vessel outside of the ship's wake to avoid possible contamination from the ship's hull. It was developed by Geoffrey Smith and Ken Bruland (University of California, Santa Cruz).

PI supplied instrument name:

Dataset-specific description

Inductively Coupled Plasma Mass Spectrometer

(more info)

Short Name: ICP Mass Spec

Community Standard Description

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.

PI supplied instrument name: Thermo Neptune multi-collector ICP-MS

Dataset-specific description

Neodymium isotopic measurements were made at Lamont-Doherty Earth Observatory (Palisades, NY) using a Thermo Neptune multi-collector ICP-MS.

Inductively Coupled Plasma Mass Spectrometer

(more info)

Short Name: ICP Mass Spec

Community Standard Description

Generic Description

PI supplied instrument name: Thermo X-Series II ICP-MS

Dataset-specific description

Rare earth element dissolved concentrations were analysed at Oregon State University (Corvallis, OR) using a Thermo X-Series II ICP-MS.

Niskin bottle

(more info)

Short Name: Niskin bottle

Community Standard Description

Generic Description

A Niskin bottle (a next generation water sampler based on the Nansen bottle) is a cylindrical, non-metallic water collection device with stoppers at both ends. The bottles can be attached individually on a hydrowire or deployed in 12, 24 or 36 bottle Rosette systems mounted on a frame and combined with a CTD. Niskin bottles are used to collect discrete water samples for a range of measurements including pigments, nutrients, plankton, etc.

PI supplied instrument name:

Dataset-specific description

Parameters

Supplied Name	Supplied description	Supplied Units	Standard Name
Cruise	Cruise identification (GP16; TN303)	unitless	cruise_id
Station	Station number	unitless	station
GEOTRC_SAMPNO	Unique GEOTRACES sample number	unitless	sample
DEPTH	Sample depth	meters (m)	depth
Sampling_Device	Sampling instrument	unitless	instrument
Year	4-digit year; format: yyyy	unitless	year
Date_Time	Date and time (UTC); format: yyyy-mm-ddTHH:MM:SS	unitless	date
Longitude	Longitude	degrees East	lon
Latitude	Latitude	degrees North	lat
La_D_CONC_BOTTLE	Dissolved Concentration of Lanthanum (La) from bottle samples	picomoles per kilogram (pmol/kg)	trace_element_conc
La_D_CONC_BOTTLE_QV_IODE	La_D_CONC_BOTTLE data quality flag using IODE scheme	unitless	q_flag
Ce_D_CONC_BOTTLE	Dissolved Concentration of Cerium (Ce) from bottle samples	pmol/kg	trace_element_conc
Ce_D_CONC_BOTTLE_QV_IODE	Ce_D_CONC_BOTTLE data quality flag using IODE scheme	unitless	q_flag
Pr_D_CONC_BOTTLE	Dissolved Concentration of Praseodymium (Pr) from bottle samples	pmol/kg	trace_element_conc
Pr_D_CONC_BOTTLE_QV_IODE	Pr_D_CONC_BOTTLE data quality flag using IODE scheme	unitless	q_flag
Nd_D_CONC_BOTTLE	Dissolved Concentration of Neodymium (Nd) from bottle samples	pmol/kg	trace_element_conc
Nd_D_CONC_BOTTLE_QV_IODE	Nd_D_CONC_BOTTLE data quality flag using IODE scheme	unitless	q_flag
Sm_D_CONC_BOTTLE	Dissolved Concentration of Samarium (Sm) from bottle samples	pmol/kg	trace_element_conc
Sm_D_CONC_BOTTLE_QV_IODE	Sm_D_CONC_BOTTLE data quality flag using IODE scheme	unitless	q_flag
Eu_D_CONC_BOTTLE	Dissolved Concentration of Europium (Eu) from bottle samples	pmol/kg	trace_element_conc
Eu_D_CONC_BOTTLE_QV_IODE	Eu_D_CONC_BOTTLE data quality flag using IODE scheme	unitless	q_flag
Gd_D_CONC_BOTTLE	Dissolved Concentration of Gadolinium (Gd) from bottle samples	pmol/kg	trace_element_conc
Gd_D_CONC_BOTTLE_QV_IODE	Gd_D_CONC_BOTTLE data quality flag using IODE scheme	unitless	q_flag
Tb_D_CONC_BOTTLE	Dissolved Concentration of Terbium (Tb) from bottle samples	pmol/kg	trace_element_conc
Tb_D_CONC_BOTTLE_QV_IODE	Tb_D_CONC_BOTTLE data quality flag using IODE scheme	unitless	q_flag
Dy_D_CONC_BOTTLE	Dissolved Concentration of Dysprosium (Dy) from bottle samples	pmol/kg	trace_element_conc
Dy_D_CONC_BOTTLE_QV_IODE	Dy_D_CONC_BOTTLE data quality flag using IODE scheme	unitless	q_flag
Ho_D_CONC_BOTTLE	Dissolved Concentration of Holmium (Ho) from bottle samples	pmol/kg	trace_element_conc
Ho_D_CONC_BOTTLE_QV_IODE	Ho_D_CONC_BOTTLE data quality flag using IODE scheme	unitless	q_flag
Er_D_CONC_BOTTLE	Dissolved Concentration of Erbium (Er) from bottle samples	pmol/kg	trace_element_conc
Er_D_CONC_BOTTLE_QV_IODE	Er_D_CONC_BOTTLE data quality flag using IODE scheme	unitless	q_flag
Tm_D_CONC_BOTTLE	Dissolved Concentration of Thulium ( Tm) from bottle samples	pmol/kg	trace_element_conc
Tm_D_CONC_BOTTLE_QV_IODE	Tm_D_CONC_BOTTLE data quality flag using IODE scheme	unitless	q_flag
Yb_D_CONC_BOTTLE	Dissolved Concentration of Ytterbium (Yb) from bottle samples	pmol/kg	trace_element_conc
Yb_D_CONC_BOTTLE_QV_IODE	Yb_D_CONC_BOTTLE data quality flag using IODE scheme	unitless	q_flag
Lu_D_CONC_BOTTLE	Dissolved Concentration of Lutetium (Lu) from bottle samples	pmol/kg	trace_element_conc
Lu_D_CONC_BOTTLE_QV_IODE	Lu_D_CONC_BOTTLE data quality flag using IODE scheme	unitless	q_flag
Nd_143_144_D_EPSILON_BOTTLE	Isotopic ratio of neodymium 143/144 from bottle samples	epsilon units	Nd143_144
Nd_143_144_D_EPSILON_BOTTLE_SD	1-sigma error of Epsilon Nd from bottle samples	epsilon units	Nd143_144
Nd_143_144_D_EPSILON_BOTTLE_QV_IODE	Nd_143_144_D_EPSILON_BOTTLE data quality flag using IODE scheme	unitless	q_flag
La_D_CONC_FISH	Dissolved Concentration of Lanthanum (La) from GeoFish samples	pmol/kg	trace_element_conc
La_D_CONC_FISH_QV_IODE	La_D_CONC_FISH data quality flag using IODE scheme	unitless	q_flag
Ce_D_CONC_FISH	Dissolved Concentration of Cerium (Ce) from GeoFish samples	pmol/kg	trace_element_conc
Ce_D_CONC_FISH_QV_IODE	Ce_D_CONC_FISH data quality flag using IODE scheme	unitless	q_flag
Pr_D_CONC_FISH	Dissolved Concentration of Praseodymium (Pr) from GeoFish samples	pmol/kg	trace_element_conc
Pr_D_CONC_FISH_QV_IODE	Pr_D_CONC_FISH data quality flag using IODE scheme	unitless	q_flag
Nd_D_CONC_FISH	Dissolved Concentration of Neodymium (Nd) from GeoFish samples	pmol/kg	trace_element_conc
Nd_D_CONC_FISH_QV_IODE	Nd_D_CONC_FISH data quality flag using IODE scheme	unitless	q_flag
Sm_D_CONC_FISH	Dissolved Concentration of Samarium (Sm) from GeoFish samples	pmol/kg	trace_element_conc
Sm_D_CONC_FISH_QV_IODE	Sm_D_CONC_FISH data quality flag using IODE scheme	unitless	q_flag
Eu_D_CONC_FISH	Dissolved Concentration of Europium (Eu) from GeoFish samples	pmol/kg	trace_element_conc
Eu_D_CONC_FISH_QV_IODE	Eu_D_CONC_FISH data quality flag using IODE scheme	unitless	q_flag
Gd_D_CONC_FISH	Dissolved Concentration of Gadolinium (Gd) from GeoFish samples	pmol/kg	trace_element_conc
Gd_D_CONC_FISH_QV_IODE	Gd_D_CONC_FISH data quality flag using IODE scheme	unitless	q_flag
Tb_D_CONC_FISH	Dissolved Concentration of Terbium (Tb) from GeoFish samples	pmol/kg	trace_element_conc
Tb_D_CONC_FISH_QV_IODE	Tb_D_CONC_FISH data quality flag using IODE scheme	unitless	q_flag
Dy_D_CONC_FISH	Dissolved Concentration of Dysprosium (Dy) from GeoFish samples	pmol/kg	trace_element_conc
Dy_D_CONC_FISH_QV_IODE	data quality flag using IODE scheme	unitless	q_flag
Ho_D_CONC_FISH	Dissolved Concentration of Holmium (Ho) from GeoFish samples	pmol/kg	trace_element_conc
Ho_D_CONC_FISH_QV_IODE	Ho_D_CONC_FISH data quality flag using IODE scheme	unitless	q_flag
Er_D_CONC_FISH	Dissolved Concentration of Erbium (Er) from GeoFish samples	pmol/kg	trace_element_conc
Er_D_CONC_FISH_QV_IODE	Er_D_CONC_FISH data quality flag using IODE scheme	unitless	q_flag
Tm_D_CONC_FISH	Dissolved Concentration of Thulium ( Tm) from GeoFish samples	pmol/kg	trace_element_conc
Tm_D_CONC_FISH_QV_IODE	Tm_D_CONC_FISH data quality flag using IODE scheme	unitless	q_flag
Yb_D_CONC_FISH	Dissolved Concentration of Ytterbium (Yb) from GeoFish samples	pmol/kg	trace_element_conc
Yb_D_CONC_FISH_QV_IODE	Yb_D_CONC_FISH data quality flag using IODE scheme	unitless	q_flag
Lu_D_CONC_FISH	Dissolved Concentration of Lutetium (Lu) from GeoFish samples	pmol/kg	trace_element_conc
Lu_D_CONC_FISH_QV_IODE	Lu_D_CONC_FISH data quality flag using IODE scheme	unitless	q_flag
Nd_143_144_D_EPSILON_FISH	Isotopic ratio of neodymium 143/144 from GeoFish samples	epsilon units	Nd143_144
Nd_143_144_D_EPSILON_FISH_SD	1-sigma error of Epsilon Nd from GeoFish samples	epsilon units	Nd143_144
Nd_143_144_D_EPSILON_FISH_QV_IODE	Nd_143_144_D_EPSILON_FISH data quality flag using IODE scheme	unitless	q_flag

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Dataset: GP16 Dissolved REEs