Dataset: GP16 Dissolved Nd Isotopes and REEs - LDEO

Name: Dissolved neodymium (Nd) isotopes and concentrations of rare-earth elements (REEs) reported by LDEO in seawater samples collected during the GEOTRACES GP16 East Pacific Zonal Transect cruise (TN303) on R/V Thomas G. Thompson from October to December 2013
Published: 2023-12-19
Keywords: GEOTRACES, GP16, Nd isotopes, REE concentrations, oceans

Cite This Dataset

DOI:10.26008/1912/bco-dmo.915447.1

Spatial Extent: N:-10.5003 E:-77.657 S:-16.0006 W:-152.079

Temporal Extent: 2013-10-29 - 2013-12-18

Project:

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

U.S. GEOTRACES East Pacific Zonal Transect (GP16) (U.S. GEOTRACES EPZT)

Program:

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

Principal Investigator:

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

Co-Principal Investigator:

Leopoldo D. Pena (University of Barcelona, U Barcelona)

Contact:

Yingzhe Wu (Lamont-Doherty Earth Observatory, LDEO)

Analyst:

Chandranath Basak (Lamont-Doherty Earth Observatory, LDEO)

Yingzhe Wu (Lamont-Doherty Earth Observatory, LDEO)

Technician:

Louise L. Bolge (Lamont-Doherty Earth Observatory, LDEO)

BCO-DMO Data Manager:

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

Version:

Version Date:

2023-12-19

Restricted:

Validated:

Yes

Current State:

Final no updates expected

Dissolved neodymium (Nd) isotopes and concentrations of rare-earth elements (REEs) reported by LDEO in seawater samples collected during the GEOTRACES GP16 East Pacific Zonal Transect cruise (TN303) on R/V Thomas G. Thompson from October to December 2013

Abstract:

This dataset includes dissolved neodymium (Nd) isotopes and concentrations of rare earth elements (REEs) in seawater samples collected along the GEOTRACES GP16 East Pacific Zonal Transect. The cruise was aboard the R/V Thomas G. Thompson between October 25 and December 20, 2013 from Manta, Ecuador to Papeete, Tahiti. Multicollector-inductively coupled plasma-mass spectrometry (MC-ICP-MS) was used to analyze Nd isotopes and quadrupole ICP‐MS was used to analyze REE concentrations. This cruise provides a great opportunity to understand sources, sinks, and cycling of REEs in the ocean as well as how well Nd isotopes behave as a conservative water mass tracer. The data were collected by Yingzhe Wu and Chandranath Basak at Lamont-Doherty Earth Observatory of Columbia University.

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Archival Copy

Version Date	Archive	Persistent Identifier	Date Assigned
2023-12-19	Marine Biological Laboratory/Woods Hole Oceanographic Institution Library (MBLWHOI DLA)	10.26008/1912/bco-dmo.915447.1	2023-12-22

Methods & Sampling

Seawater samples were collected during the GEOTRACES GP16 cruise on R/V Thomas G. Thompson (TN303) along the East Pacific Zonal Transect in 2013. Five liters (L) of seawater were collected and stored in a cubitainer for each sample. The samples were filtered using 0.2-micrometer (μm) Sartobran cartridges and acidified using ultrapure Seastar hydrochloric acid (HCl) to pH ~ 2 shortly after sampling.

For neodymium (Nd) isotope analysis, rare-earth elements (REEs) were preconcentrated from seawater using C18 cartridges (Waters Corp., Sep-Pak classic, 360-milligrams (mg), 55-105 μm) loaded with complexing agent composed of a mixture of 2-ethylhexyl hydrogen phosphate (HDEHP) and 2-ethylhexyl dihydrogen phosphate (H2MEHP), which was first proposed by Shabani et al. (1992). In this study, we followed the methods by Jeandel et al. (1998), Lacan and Jeandel (2001), and Pahnke et al. (2012). Specifically, C18 cartridges were first cleaned in a 0.5 N HCl bath overnight, passed through 10 milliliters (mL) of 6 N HCl and then flushed with >500 mL of Milli-Q water. Cartridges were stored in Milli-Q water after cleaning. 300 μL of complexing agent HDEHP/H2MEHP was loaded on a clean cartridge for a 5 L sample. Seawater samples were adjusted to pH ≈ 3.5 by adding Optima® ammonium hydroxide before being pumped through the cartridges at 20 mL/minute by a peristaltic pump in the ultra-clean chemistry laboratory at LDEO. Cartridges were then eluted with 10 mL of 0.01 N HCl to remove barium. After barium elution, cartridges were eluted with 35 mL of 6 N HCl at 10 mL/minute by a peristaltic pump to collect REEs. REEs were dried and further purified by TRU-spec column chemistry. Nd fractions were extracted from REEs by LN-spec column chemistry and dried. They were redissolved in 0.3 mL of 3% HNO3 for the Nd isotope analysis.

For REE concentration analysis, a multi-element REE spike enriched in 138La, 142Ce, 145Nd, 149Sm, 153Eu, 155Gd, 161Dy, 167Er, 171Yb, and 176Lu (Wu et al., 2020) was added to each sample (~10 mL). The sample-spike mixture was allowed to equilibrate for at least 24 hours and then was purified and pre-concentrated through the seaFast Automated Preconcentration System for Undiluted Seawater (Elemental Scientific Inc. or ESI, Omaha, Nebraska, USA).

Data Processing Description

The Nd isotopic composition is expressed as:

εNd = [(¹⁴³Nd/¹⁴⁴Ndsample/¹⁴³Nd/¹⁴⁴NdCHUR) - 1] × 10⁴

This study uses ¹⁴³Nd/¹⁴⁴NdCHUR = 0.512638 (Jacobsen and Wasserburg, 1980).

BCO-DMO Processing

- Imported original file "DOoR_GEOTRACES GP16_eNd&REEs_LDEO.xlsx" into the BCO-DMO system.
- Flagged '-999' values as missing data values (missing data are blank/empty in the final CSV file).
- Renamed fields to comply with BCO-DMO naming conventions.
- Created the date/time field in ISO 8601 format.
- Removed the end lat/lon and end date/time columns (all empty).
- Saved the final file as "915447_v1_gp16_diss_nd_and_rees_ldeo.csv".

Data Files

File
915447_v1_gp16_diss_nd_and_rees_ldeo.csv (Comma Separated Values (.csv), 88.12 KB) MD5:6be91f8240988af0da9f1fb13b1ab0a0 Primary data file for dataset ID 915447, version 1

More Information about this dataset

Funding Sources

Funding Source	Award Number
NSF Division of Ocean Sciences	OCE-1234687

Deployments

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

Instruments

GeoFish Towed near-Surface Sampler

Supplied Name: GeoFish

Supplied Description:

Instrument Type

Generic Name: GeoFish Towed near-Surface Sampler

Acronym: GeoFish

Community Identifier: http://vocab.nerc.ac.uk/collection/L05/current/31/

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).

Multi Collector Inductively Coupled Plasma Mass Spectrometer

Supplied Name: Thermo Scientific Neptune-Plus® multicollector-inductively coupled plasma-mass spectrometer (MC-ICP-MS)

Supplied Description:

The Nd isotopic compositions were measured by a Thermo Scientific Neptune-Plus® multicollector-inductively coupled plasma-mass spectrometer (MC-ICP-MS) at LDEO. The instrument was coupled with a desolvation introduction system (an Apex nebulizer). All measured Nd isotopic compositions were corrected for mass fractionation using an exponential law with ¹⁴⁶Nd/¹⁴⁴Nd = 0.7219. For each analytical session, standard JNdi-1 was measured between every sample. For each sample, the measured Nd isotopic composition is normalized to ¹⁴³Nd/¹⁴⁴NdJNdi = 0.512115 (Tanaka et al., 2000), using the average measured JNd sample of a measuring session. JNdi-1 standards yielded external reproducibilities (2σ) as follows: ± 0.30 εNd units for 50 ppb solutions, ± 0.32 for 40 ppb, ± 0.36 for 30 ppb, ± 0.33 for 20 ppb, and ± 0.42 for 10 ppb.

Instrument Type

Generic Name: Multi Collector Inductively Coupled Plasma Mass Spectrometer

Acronym: MC-ICPMS

Generic Description:

A Multi Collector Inductively Coupled Plasma Mass Spectrometry (MC-ICPMS) is a type of mass spectrometry where the sample is ionized in a plasma (a partially ionized gas, such as Argon, containing free electrons) that has been generated by electromagnetic induction. A series of collectors is used to detect several ion beams simultaneously.

A MC-ICPMS is a hybrid mass spectrometer that combines the advantages of an inductively coupled plasma source and the precise measurements of a magnetic sector multicollector mass spectrometer. The primary advantage of the MC-ICPMS is its ability to analyze a broader range of elements, including those with high ionization potential that are difficult to analyze by Thermal Ionization Mass Spectrometry (TIMS). The ICP source also allows flexibility in how samples are introduced to the mass spectrometer and allows the analysis of samples introduced either as an aspirated solution or as an aerosol produced by laser ablation.

Niskin bottle

Supplied Description:

Instrument Type

Generic Name: Niskin bottle

Community Identifier: http://vocab.nerc.ac.uk/collection/L22/current/TOOL0412/

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.

Quadrupole Mass Spectrometer

Supplied Name: VG PlasmaQuad ExCell® quadrupole ICP‐MS

Supplied Description:

The preconcentrated REEs were measured on a VG PlasmaQuad ExCell® quadrupole ICP‐MS, which was coupled to a desolvating introduction system (a CETAC Aridusᵀᴹ) that minimized molecular oxide ion formation with a self‐aspirated Apex ST PFA micro flow nebulizer (ESI). For quality control, the LDEO lab repeatedly analyzes seawater samples from a GEOTRACES intercalibration station Bermuda Atlantic Time Series (BATS; 31.7°N, 64.1°W) in the North Atlantic at 20 m (n = 18) and 2,000 m (n = 16) (Wu et al., 2020). For the BATS 20 and 2,000 m samples, long‐term external reproducibilities (2σ RSD%) range from 1.5% to 6.2%, depending on the element, using a two standard deviation filter on the data (Wu et al., 2020). Those elements showing small errors of <2% to ~5% include high (10-23 pmol/kg, for La, Ce, Nd), intermediate (3-6 pmol/kg, for Pr in the 2,000 m sample, Sm, Dy, Er, Yb), and low (0.7-0.8 pmol/kg, for Ho in the 2,000 m sample, Tb, Tm) abundance elements (Wu et al., 2020). Those showing higher errors of 5-6% include both intermediate (3-5 pmol/kg for Pr in the 20 m sample, Gd) and low (Eu, Ho in the 20 m sample, Lu; 0.7-1.5 pmol/kg) abundance elements, and also Pr, Tb, Ho, Tm (Wu et al., 2020).

Instrument Type

Generic Name: Quadrupole Mass Spectrometer

Acronym: QMS

Generic Description:

A piece of apparatus that consists of an ion source, a mass-to-charge analyser, a detector and a vacuum system and is used to measure mass spectra. The detector is a quadrupole mass-to-charge analyser, which holds the ions in a stable orbit by an electric field generated by four parallel electrodes.

Parameters

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

Supplied Name	Supplied description	Supplied Units	Standard Name
Station_ID	Station number	unitless	station
ISO_DateTime_UTC_Start	Date and time (UTC) at start of sampling event in ISO 8601 format Format: %Y-%m-%dT%H:%MZ	unitless	ISO_DateTime_UTC
Start_Date_UTC	Date at start of sampling event Format: %Y%m%d	unitless	date
Start_Time_UTC	Time (UTC) at start of sampling event Format: %H%M	unitless	time
Start_Latitude	Latitude; North is positive.	decimal degrees	lat
Start_Longitude	Longitude; East is positive.	decimal degrees	lon
Event_ID	GEOTRACES event number	unitless	event
Sample_ID	GEOTRACES sample number	unitless	sample
Sample_Depth	Sampling depth	meters (m)	depth
CTDPRS_T_VALUE_SENSOR_vvdwtp	Sampling pressure of CTD	decibars (dbar)	press
SD1_CTDPRS_T_VALUE_SENSOR_vvdwtp	Standard deviation of CTDPRS_T_VALUE_SENSOR_vvdwtp	decibars (dbar)	press
Flag_CTDPRS_T_VALUE_SENSOR_vvdwtp	Quality flag for CTDPRS_T_VALUE_SENSOR_vvdwtp	unitless	q_flag
CTDTMP_T_VALUE_SENSOR_fp7gnu	Sampling temperature of CTD	degrees Celsius	temp
SD1_CTDTMP_T_VALUE_SENSOR_fp7gnu	Standard deviation of CTDTMP_T_VALUE_SENSOR_fp7gnu	degrees Celsius	temp
Flag_CTDTMP_T_VALUE_SENSOR_fp7gnu	Quality flag for CTDTMP_T_VALUE_SENSOR_fp7gnu	unitless	q_flag
CTDSAL_D_CONC_SENSOR_dipxfj	Sampling salinity of CTD	PSU?	sal
SD1_CTDSAL_D_CONC_SENSOR_dipxfj	Standard deviation of CTDSAL_D_CONC_SENSOR_dipxfj	PSU?	sal
Flag_CTDSAL_D_CONC_SENSOR_dipxfj	Quality flag for CTDSAL_D_CONC_SENSOR_dipxfj	unitless	q_flag
CTDOXY_D_CONC_SENSOR_wpflfa	Sampling oxygen concentration of CTD	micromoles per kilogram (umol/kg)	O2
SD1_CTDOXY_D_CONC_SENSOR_wpflfa	Standard deviation of CTDOXY_D_CONC_SENSOR_wpflfa	micromoles per kilogram (umol/kg)	O2
Flag_CTDOXY_D_CONC_SENSOR_wpflfa	Quality flag for CTDOXY_D_CONC_SENSOR_wpflfa	unitless	q_flag
SILICATE_D_CONC_BOTTLE_7ccpa2	Silicate concentration	micromoles per kilogram (umol/kg)	Silicate
SD1_SILICATE_D_CONC_BOTTLE_7ccpa2	Standard deviation of SILICATE_D_CONC_BOTTLE_7ccpa2	micromoles per kilogram (umol/kg)	Silicate
Flag_SILICATE_D_CONC_BOTTLE_7ccpa2	Quality flag for SILICATE_D_CONC_BOTTLE_7ccpa2	unitless	q_flag
PHOSPHATE_D_CONC_BOTTLE_145nsm	Phosphate concentration	micromoles per kilogram (umol/kg)	PO43-
SD1_PHOSPHATE_D_CONC_BOTTLE_145nsm	Standard deviation of PHOSPHATE_D_CONC_BOTTLE_145nsm	micromoles per kilogram (umol/kg)	PO43-
Flag_PHOSPHATE_D_CONC_BOTTLE_145nsm	Quality flag for PHOSPHATE_D_CONC_BOTTLE_145nsm	unitless	q_flag
NITRATE_D_CONC_BOTTLE_oxilrz	Nitrate concentration	micromoles per kilogram (umol/kg)	NO3
SD1_NITRATE_D_CONC_BOTTLE_oxilrz	Standard deviation of NITRATE_D_CONC_BOTTLE_oxilrz	micromoles per kilogram (umol/kg)	NO3
Flag_NITRATE_D_CONC_BOTTLE_oxilrz	Quality flag for NITRATE_D_CONC_BOTTLE_oxilrz	unitless	q_flag
Nd_143_144_D_EPSILON_BOTTLE_6yxwln	Dissolved 143Nd/144Nd ratio normalized to 0.512638 in parts per 10000	unitless	Nd143_144
SD1_Nd_143_144_D_EPSILON_BOTTLE_6yxwln	Standard deviation of Nd_143_144_D_EPSILON_BOTTLE_6yxwln. External 1 standard deviation of repeatedly measured JNdi standards during the analysis normalized to 0.512638 in parts per 10000	unitless	Nd143_144
Flag_Nd_143_144_D_EPSILON_BOTTLE_6yxwln	Quality flag for Nd_143_144_D_EPSILON_BOTTLE_6yxwln. Flag 1: data evaluated as Good; Flag 2: data quality not evaluated or unknown; Flag 3: data quality assessed to be questionable; Flag 4: data quality assessed to be Bad; Flag 9: no data	unitless	q_flag
La_D_CONC_BOTTLE_3i8t0o	Dissolved Lanthanum (La) concentration	picomoles per kilogram (pmol/kg)	trace_element_conc
SD1_La_D_CONC_BOTTLE_3i8t0o	External 1 standard deviation of La_D_CONC_BOTTLE_3i8t0o	picomoles per kilogram (pmol/kg)	trace_element_conc
Flag_La_D_CONC_BOTTLE_3i8t0o	Quality flag for La_D_CONC_BOTTLE_3i8t0o. Flag 1: data evaluated as Good; Flag 2: data quality not evaluated or unknown; Flag 3: data quality assessed to be questionable; Flag 4: data quality assessed to be Bad; Flag 9: no data	unitless	q_flag
Ce_D_CONC_BOTTLE_khndur	Dissolved Cerium (Ce) concentration	picomoles per kilogram (pmol/kg)	trace_element_conc
SD1_Ce_D_CONC_BOTTLE_khndur	External 1 standard deviation of Ce_D_CONC_BOTTLE_khndur	picomoles per kilogram (pmol/kg)	trace_element_conc
Flag_Ce_D_CONC_BOTTLE_khndur	Quality flag for Ce_D_CONC_BOTTLE_khndur. Flag 1: data evaluated as Good; Flag 2: data quality not evaluated or unknown; Flag 3: data quality assessed to be questionable; Flag 4: data quality assessed to be Bad; Flag 9: no data	unitless	q_flag
Pr_D_CONC_BOTTLE_oxu3mt	Dissolved Praseodymium (Pr) concentration	picomoles per kilogram (pmol/kg)	trace_element_conc
SD1_Pr_D_CONC_BOTTLE_oxu3mt	External 1 standard deviation of Pr_D_CONC_BOTTLE_oxu3mt	picomoles per kilogram (pmol/kg)	trace_element_conc
Flag_Pr_D_CONC_BOTTLE_oxu3mt	Quality flag for Pr_D_CONC_BOTTLE_oxu3mt. Flag 1: data evaluated as Good; Flag 2: data quality not evaluated or unknown; Flag 3: data quality assessed to be questionable; Flag 4: data quality assessed to be Bad; Flag 9: no data	unitless	q_flag
Nd_D_CONC_BOTTLE_awd28c	Dissolved Neodymium (Nd) concentration	picomoles per kilogram (pmol/kg)	trace_element_conc
SD1_Nd_D_CONC_BOTTLE_awd28c	External 1 standard deviation of Nd_D_CONC_BOTTLE_awd28c	picomoles per kilogram (pmol/kg)	trace_element_conc
Flag_Nd_D_CONC_BOTTLE_awd28c	Quality flag for Nd_D_CONC_BOTTLE_awd28c. Flag 1: data evaluated as Good; Flag 2: data quality not evaluated or unknown; Flag 3: data quality assessed to be questionable; Flag 4: data quality assessed to be Bad; Flag 9: no data	unitless	q_flag
Sm_D_CONC_BOTTLE_iumac7	Dissolved Samarium (Sm) concentration	picomoles per kilogram (pmol/kg)	trace_element_conc
SD1_Sm_D_CONC_BOTTLE_iumac7	External 1 standard deviation of Sm_D_CONC_BOTTLE_iumac7	picomoles per kilogram (pmol/kg)	trace_element_conc
Flag_Sm_D_CONC_BOTTLE_iumac7	Quality flag for Sm_D_CONC_BOTTLE_iumac7. Flag 1: data evaluated as Good; Flag 2: data quality not evaluated or unknown; Flag 3: data quality assessed to be questionable; Flag 4: data quality assessed to be Bad; Flag 9: no data	unitless	q_flag
Eu_D_CONC_BOTTLE_phoc0h	Dissolved Europium (Eu) concentration	picomoles per kilogram (pmol/kg)	trace_element_conc
SD1_Eu_D_CONC_BOTTLE_phoc0h	External 1 standard deviation of Eu_D_CONC_BOTTLE_phoc0h	picomoles per kilogram (pmol/kg)	trace_element_conc
Flag_Eu_D_CONC_BOTTLE_phoc0h	Quality flag for Eu_D_CONC_BOTTLE_phoc0h. Flag 1: data evaluated as Good; Flag 2: data quality not evaluated or unknown; Flag 3: data quality assessed to be questionable; Flag 4: data quality assessed to be Bad; Flag 9: no data	unitless	q_flag
Gd_D_CONC_BOTTLE_mqpxwv	Dissolved Gadolinium (Gd) concentration	picomoles per kilogram (pmol/kg)	trace_element_conc
SD1_Gd_D_CONC_BOTTLE_mqpxwv	External 1 standard deviation of Gd_D_CONC_BOTTLE_mqpxwv	picomoles per kilogram (pmol/kg)	trace_element_conc
Flag_Gd_D_CONC_BOTTLE_mqpxwv	Quality flag for Gd_D_CONC_BOTTLE_mqpxwv. Flag 1: data evaluated as Good; Flag 2: data quality not evaluated or unknown; Flag 3: data quality assessed to be questionable; Flag 4: data quality assessed to be Bad; Flag 9: no data	unitless	q_flag
Tb_D_CONC_BOTTLE_qn56fc	Dissolved Terbium (Tb) concentration	picomoles per kilogram (pmol/kg)	trace_element_conc
SD1_Tb_D_CONC_BOTTLE_qn56fc	External 1 standard deviation of Tb_D_CONC_BOTTLE_qn56fc	picomoles per kilogram (pmol/kg)	trace_element_conc
Flag_Tb_D_CONC_BOTTLE_qn56fc	Quality flag for Tb_D_CONC_BOTTLE_qn56fc. Flag 1: data evaluated as Good; Flag 2: data quality not evaluated or unknown; Flag 3: data quality assessed to be questionable; Flag 4: data quality assessed to be Bad; Flag 9: no data	unitless	q_flag
Dy_D_CONC_BOTTLE_ryfy4p	Dissolved Dysprosium (Dy) concentration	picomoles per kilogram (pmol/kg)	trace_element_conc
SD1_Dy_D_CONC_BOTTLE_ryfy4p	External 1 standard deviation of Dy_D_CONC_BOTTLE_ryfy4p	picomoles per kilogram (pmol/kg)	trace_element_conc
Flag_Dy_D_CONC_BOTTLE_ryfy4p	Quality flag for Dy_D_CONC_BOTTLE_ryfy4p. Flag 1: data evaluated as Good; Flag 2: data quality not evaluated or unknown; Flag 3: data quality assessed to be questionable; Flag 4: data quality assessed to be Bad; Flag 9: no data	unitless	q_flag
Ho_D_CONC_BOTTLE_viczuk	Dissolved Holmium (Ho) concentration	picomoles per kilogram (pmol/kg)	trace_element_conc
SD1_Ho_D_CONC_BOTTLE_viczuk	External 1 standard deviation of Ho_D_CONC_BOTTLE_viczuk	picomoles per kilogram (pmol/kg)	trace_element_conc
Flag_Ho_D_CONC_BOTTLE_viczuk	Quality flag for Ho_D_CONC_BOTTLE_viczuk. Flag 1: data evaluated as Good; Flag 2: data quality not evaluated or unknown; Flag 3: data quality assessed to be questionable; Flag 4: data quality assessed to be Bad; Flag 9: no data	unitless	q_flag
Er_D_CONC_BOTTLE_toj6xw	Dissolved Erbium (Er) concentration	picomoles per kilogram (pmol/kg)	trace_element_conc
SD1_Er_D_CONC_BOTTLE_toj6xw	External 1 standard deviation of Er_D_CONC_BOTTLE_toj6xw	picomoles per kilogram (pmol/kg)	trace_element_conc
Flag_Er_D_CONC_BOTTLE_toj6xw	Quality flag for Er_D_CONC_BOTTLE_toj6xw. Flag 1: data evaluated as Good; Flag 2: data quality not evaluated or unknown; Flag 3: data quality assessed to be questionable; Flag 4: data quality assessed to be Bad; Flag 9: no data	unitless	q_flag
Tm_D_CONC_BOTTLE_zv4lag	Dissolved Thulium (Tm) concentration	picomoles per kilogram (pmol/kg)	trace_element_conc
SD1_Tm_D_CONC_BOTTLE_zv4lag	External 1 standard deviation of Tm_D_CONC_BOTTLE_zv4lag	picomoles per kilogram (pmol/kg)	trace_element_conc
Flag_Tm_D_CONC_BOTTLE_zv4lag	Quality flag for Tm_D_CONC_BOTTLE_zv4lag. Flag 1: data evaluated as Good; Flag 2: data quality not evaluated or unknown; Flag 3: data quality assessed to be questionable; Flag 4: data quality assessed to be Bad; Flag 9: no data	unitless	q_flag
Yb_D_CONC_BOTTLE_pdkue2	Dissolved Ytterbium (Yb) concentration	picomoles per kilogram (pmol/kg)	trace_element_conc
SD1_Yb_D_CONC_BOTTLE_pdkue2	External 1 standard deviation of Yb_D_CONC_BOTTLE_pdkue2	picomoles per kilogram (pmol/kg)	trace_element_conc
Flag_Yb_D_CONC_BOTTLE_pdkue2	Quality flag for Yb_D_CONC_BOTTLE_pdkue2. Flag 1: data evaluated as Good; Flag 2: data quality not evaluated or unknown; Flag 3: data quality assessed to be questionable; Flag 4: data quality assessed to be Bad; Flag 9: no data	unitless	q_flag
Lu_D_CONC_BOTTLE_akkbyc	Dissolved Lutetium (Lu) concentration	picomoles per kilogram (pmol/kg)	trace_element_conc
SD1_Lu_D_CONC_BOTTLE_akkbyc	External 1 standard deviation of Lu_D_CONC_BOTTLE_akkbyc	picomoles per kilogram (pmol/kg)	trace_element_conc
Flag_Lu_D_CONC_BOTTLE_akkbyc	Quality flag for Lu_D_CONC_BOTTLE_akkbyc. Flag 1: data evaluated as Good; Flag 2: data quality not evaluated or unknown; Flag 3: data quality assessed to be questionable; Flag 4: data quality assessed to be Bad; Flag 9: no data	unitless	q_flag
Nd_143_144_D_EPSILON_FISH_otveuu	Dissolved 143Nd/144Nd ratio normalized to 0.512638 in parts per 10000	unitless	Nd143_144
SD1_Nd_143_144_D_EPSILON_FISH_otveuu	Standard deviation of Nd_143_144_D_EPSILON_FISH_otveuu. External 1 standard deviation of repeatedly measured JNdi standards during the analysis normalized to 0.512638 in parts per 10000	unitless	Nd143_144
Flag_Nd_143_144_D_EPSILON_FISH_otveuu	Quality flag for Nd_143_144_D_EPSILON_FISH_otveuu. Flag 1: data evaluated as Good; Flag 2: data quality not evaluated or unknown; Flag 3: data quality assessed to be questionable; Flag 4: data quality assessed to be Bad; Flag 9: no data	unitless	q_flag
La_D_CONC_FISH_h0emhv	Dissolved Lanthanum (La) concentration	picomoles per kilogram (pmol/kg)	trace_element_conc
SD1_La_D_CONC_FISH_h0emhv	External 1 standard deviation of La_D_CONC_FISH_h0emhv	picomoles per kilogram (pmol/kg)	trace_element_conc
Flag_La_D_CONC_FISH_h0emhv	Quality flag for La_D_CONC_FISH_h0emhv. Flag 1: data evaluated as Good; Flag 2: data quality not evaluated or unknown; Flag 3: data quality assessed to be questionable; Flag 4: data quality assessed to be Bad; Flag 9: no data	unitless	q_flag
Ce_D_CONC_FISH_pfwxb4	Dissolved Cerium (Ce) concentration	picomoles per kilogram (pmol/kg)	trace_element_conc
SD1_Ce_D_CONC_FISH_pfwxb4	External 1 standard deviation of Ce_D_CONC_FISH_pfwxb4	picomoles per kilogram (pmol/kg)	trace_element_conc
Flag_Ce_D_CONC_FISH_pfwxb4	Quality flag for Ce_D_CONC_FISH_pfwxb4. Flag 1: data evaluated as Good; Flag 2: data quality not evaluated or unknown; Flag 3: data quality assessed to be questionable; Flag 4: data quality assessed to be Bad; Flag 9: no data	unitless	q_flag
Pr_D_CONC_FISH_j8n3si	Dissolved Praseodymium (Pr) concentration	picomoles per kilogram (pmol/kg)	trace_element_conc
SD1_Pr_D_CONC_FISH_j8n3si	External 1 standard deviation of Pr_D_CONC_FISH_j8n3si	picomoles per kilogram (pmol/kg)	trace_element_conc
Flag_Pr_D_CONC_FISH_j8n3si	Quality flag for Pr_D_CONC_FISH_j8n3si. Flag 1: data evaluated as Good; Flag 2: data quality not evaluated or unknown; Flag 3: data quality assessed to be questionable; Flag 4: data quality assessed to be Bad; Flag 9: no data	unitless	q_flag
Nd_D_CONC_FISH_ggfcf6	Dissolved Neodymium (Nd) concentration	picomoles per kilogram (pmol/kg)	trace_element_conc
SD1_Nd_D_CONC_FISH_ggfcf6	External 1 standard deviation of Nd_D_CONC_FISH_ggfcf6	picomoles per kilogram (pmol/kg)	trace_element_conc
Flag_Nd_D_CONC_FISH_ggfcf6	Quality flag for Nd_D_CONC_FISH_ggfcf6. Flag 1: data evaluated as Good; Flag 2: data quality not evaluated or unknown; Flag 3: data quality assessed to be questionable; Flag 4: data quality assessed to be Bad; Flag 9: no data	unitless	q_flag
Sm_D_CONC_FISH_qjgqsy	Dissolved Samarium (Sm) concentration	picomoles per kilogram (pmol/kg)	trace_element_conc
SD1_Sm_D_CONC_FISH_qjgqsy	External 1 standard deviation of Sm_D_CONC_FISH_qjgqsy	picomoles per kilogram (pmol/kg)	trace_element_conc
Flag_Sm_D_CONC_FISH_qjgqsy	Quality flag for Sm_D_CONC_FISH_qjgqsy. Flag 1: data evaluated as Good; Flag 2: data quality not evaluated or unknown; Flag 3: data quality assessed to be questionable; Flag 4: data quality assessed to be Bad; Flag 9: no data	unitless	q_flag
Eu_D_CONC_FISH_vyaby1	Dissolved Europium (Eu) concentration	picomoles per kilogram (pmol/kg)	trace_element_conc
SD1_Eu_D_CONC_FISH_vyaby1	External 1 standard deviation of Eu_D_CONC_FISH_vyaby1	picomoles per kilogram (pmol/kg)	trace_element_conc
Flag_Eu_D_CONC_FISH_vyaby1	Quality flag for Eu_D_CONC_FISH_vyaby1. Flag 1: data evaluated as Good; Flag 2: data quality not evaluated or unknown; Flag 3: data quality assessed to be questionable; Flag 4: data quality assessed to be Bad; Flag 9: no data	unitless	q_flag
Gd_D_CONC_FISH_eud8ti	Dissolved Gadolinium (Gd) concentration	picomoles per kilogram (pmol/kg)	trace_element_conc
SD1_Gd_D_CONC_FISH_eud8ti	External 1 standard deviation of Gd_D_CONC_FISH_eud8ti	picomoles per kilogram (pmol/kg)	trace_element_conc
Flag_Gd_D_CONC_FISH_eud8ti	Quality flag for Gd_D_CONC_FISH_eud8ti. Flag 1: data evaluated as Good; Flag 2: data quality not evaluated or unknown; Flag 3: data quality assessed to be questionable; Flag 4: data quality assessed to be Bad; Flag 9: no data	unitless	q_flag
Tb_D_CONC_FISH_3667kp	Dissolved Terbium (Tb) concentration	picomoles per kilogram (pmol/kg)	trace_element_conc
SD1_Tb_D_CONC_FISH_3667kp	External 1 standard deviation of Tb_D_CONC_FISH_3667kp	picomoles per kilogram (pmol/kg)	trace_element_conc
Flag_Tb_D_CONC_FISH_3667kp	Quality flag for Tb_D_CONC_FISH_3667kp. Flag 1: data evaluated as Good; Flag 2: data quality not evaluated or unknown; Flag 3: data quality assessed to be questionable; Flag 4: data quality assessed to be Bad; Flag 9: no data	unitless	q_flag
Dy_D_CONC_FISH_wim6wr	Dissolved Dysprosium (Dy) concentration	picomoles per kilogram (pmol/kg)	trace_element_conc
SD1_Dy_D_CONC_FISH_wim6wr	External 1 standard deviation of Dy_D_CONC_FISH_wim6wr	picomoles per kilogram (pmol/kg)	trace_element_conc
Flag_Dy_D_CONC_FISH_wim6wr	Quality flag for Dy_D_CONC_FISH_wim6wr. Flag 1: data evaluated as Good; Flag 2: data quality not evaluated or unknown; Flag 3: data quality assessed to be questionable; Flag 4: data quality assessed to be Bad; Flag 9: no data	unitless	q_flag
Ho_D_CONC_FISH_jz4sed	Dissolved Holmium (Ho) concentration	picomoles per kilogram (pmol/kg)	trace_element_conc
SD1_Ho_D_CONC_FISH_jz4sed	External 1 standard deviation of Ho_D_CONC_FISH_jz4sed	picomoles per kilogram (pmol/kg)	trace_element_conc
Flag_Ho_D_CONC_FISH_jz4sed	Quality flag for Ho_D_CONC_FISH_jz4sed. Flag 1: data evaluated as Good; Flag 2: data quality not evaluated or unknown; Flag 3: data quality assessed to be questionable; Flag 4: data quality assessed to be Bad; Flag 9: no data	unitless	q_flag
Er_D_CONC_FISH_yj558b	Dissolved Erbium (Er) concentration	picomoles per kilogram (pmol/kg)	trace_element_conc
SD1_Er_D_CONC_FISH_yj558b	External 1 standard deviation of Er_D_CONC_FISH_yj558b	picomoles per kilogram (pmol/kg)	trace_element_conc
Flag_Er_D_CONC_FISH_yj558b	Quality flag for Er_D_CONC_FISH_yj558b. Flag 1: data evaluated as Good; Flag 2: data quality not evaluated or unknown; Flag 3: data quality assessed to be questionable; Flag 4: data quality assessed to be Bad; Flag 9: no data	unitless	q_flag
Tm_D_CONC_FISH_69svdh	Dissolved Thulium (Tm) concentration	picomoles per kilogram (pmol/kg)	trace_element_conc
SD1_Tm_D_CONC_FISH_69svdh	External 1 standard deviation of Tm_D_CONC_FISH_69svdh	picomoles per kilogram (pmol/kg)	trace_element_conc
Flag_Tm_D_CONC_FISH_69svdh	Quality flag for Tm_D_CONC_FISH_69svdh. Flag 1: data evaluated as Good; Flag 2: data quality not evaluated or unknown; Flag 3: data quality assessed to be questionable; Flag 4: data quality assessed to be Bad; Flag 9: no data	unitless	q_flag
Yb_D_CONC_FISH_wvyajs	Dissolved Ytterbium (Yb) concentration	picomoles per kilogram (pmol/kg)	trace_element_conc
SD1_Yb_D_CONC_FISH_wvyajs	External 1 standard deviation of Yb_D_CONC_FISH_wvyajs	picomoles per kilogram (pmol/kg)	trace_element_conc
Flag_Yb_D_CONC_FISH_wvyajs	Quality flag for Yb_D_CONC_FISH_wvyajs. Flag 1: data evaluated as Good; Flag 2: data quality not evaluated or unknown; Flag 3: data quality assessed to be questionable; Flag 4: data quality assessed to be Bad; Flag 9: no data	unitless	q_flag
Lu_D_CONC_FISH_ajuhyg	Dissolved Lutetium (Lu) concentration	picomoles per kilogram (pmol/kg)	trace_element_conc
SD1_Lu_D_CONC_FISH_ajuhyg	External 1 standard deviation of Lu_D_CONC_FISH_ajuhyg	picomoles per kilogram (pmol/kg)	trace_element_conc
Flag_Lu_D_CONC_FISH_ajuhyg	Quality flag for Lu_D_CONC_FISH_ajuhyg. Flag 1: data evaluated as Good; Flag 2: data quality not evaluated or unknown; Flag 3: data quality assessed to be questionable; Flag 4: data quality assessed to be Bad; Flag 9: no data	unitless	q_flag

Database

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Dataset: GP16 Dissolved Nd Isotopes and REEs - LDEO