URLhttps://www.bco-dmo.org/dataset/671199
Download URLhttps://www.bco-dmo.org/dataset/671199/data/download
Media Type text/tab-separated-values
Created December 27, 2016
Modified July 3, 2017
State Final no updates expected
Brief Description

Solid phase chemistry from gravity cores

Acquisition Description

Gravity core sampling took place at Dorado Outcrop off the west coast of Costa Rica in the Pacific Ocean during the R/V Atlantis cruise  AT26-24.  For more information about operations of this cruise see the cruise page which contains a link to the cruise report (AT26-24). 

Total inorganic carbon (TIC) was measured using coulometry and CaCO3 is calculated from this value. Organic carbon (OC) and nitrogen (N) were measured on a Perkin Elmer Series II 2400 CHNS/O analyzer. The Fe, Cr, Cu, Mn, and Zn represent results from dithionite extractions (see Roy et al., 2012, Continental Shelf Research, 54, 67-79). Metals were analyzed by Inductively Coupled Plasma Optical Emission Spectrophotometer (ICPOES) at the University of Akron. d13C was measured on a Carlo Erba NA-1500 elemental analyzer connected to a DeltaPlus XL mass spectrometer at Oregon State University.

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
* BD indicates Below Detection
* blank values replaced with no data value ‘nd’
* added dive_id,dive_date,dive_lat, and dive_lon from information in the cruise report (Table 4)

Instruments

The gravity corer allows researchers to sample sediment layers at the bottom of lakes or oceans. The coring device is deployed from the ship and gravity carries it to the seafloor. (http://www.whoi.edu/instruments/viewInstrument.do?id=1079).
Inductively Coupled Plasma Optical Emission Spectrophotometer (ICPOES) [Inductively Coupled Plasma Optical Emission Spectrometer]
Details

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.

Perkin Elmer Series II 2400 CHNS/O analyzer [Elemental Analyzer]
Details

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.

Carlo Erba NA-1500 elemental analyzer [Elemental Analyzer]
Details
Instance Description (Carlo Erba NA-1500 elemental analyzer)

Carlo Erba NA-1500 elemental analyzer connected to a DeltaPlus XL mass spectrometer.

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.

DeltaPlus XL mass spectrometer [Mass Spectrometer]
Details
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

core_id [core_id]
Details
core_id

Gravity core identifier

core number/identification, to be used with ice, rock and sediment cores

dive_id [dive_id]
Details
dive_id
Alvin submersible dive identifier
Unique dive id or number for ROV, AUV or HOV type system dive or deployment
dive_date [date]
Details
dive_date
Alvin submersible dive date in format yyyy-mm-dd

date; generally reported in GMT as YYYYMMDD (year; month; day); also as MMDD (month; day); EqPac dates are local Hawaii time. ISO_Date format is YYYY-MM-DD (http://www.iso.org/iso/home/standards/iso8601.htm)

top_depth [depth_core]
Details
top_depth
Top of sample interval in core
depth in core; mid-point of interval sampled
bottom_depth [depth_core]
Details
bottom_depth
Bottom of sample interval in core
depth in core; mid-point of interval sampled
depth [depth_core]
Details
depth
Middle of sample interval in core
depth in core; mid-point of interval sampled
CaCO3 [CaCO3]
Details
CaCO3
Average concentration of calcium carbonate by weight

Calcium Carbonate, in sediments as percent; or CaCO3 from water samples reported in various units; CAUTION measured in sediment and water column samples

CaCO3_stdev [CaCO3]
Details
CaCO3_stdev
Standard deviation of the concentration of calcium carbonate by weight

Calcium Carbonate, in sediments as percent; or CaCO3 from water samples reported in various units; CAUTION measured in sediment and water column samples

TIC [DIC]
Details
TIC
Average concentration of total inorganic carbon by weight

Dissolved Inorganic Carbon

TIC_stdev [DIC]
Details
TIC_stdev
Standard deviation of the concentration of total inorganic carbon by weight

Dissolved Inorganic Carbon

OC [C_org]
Details
OC
Average concentration of organic carbon (OC) by weight
organic carbon; CAUTION; usage is in sediment related files
OC_stdev [C_org]
Details
OC_stdev
Standard deviation of the concentration of organic carbon (OC) by weight
organic carbon; CAUTION; usage is in sediment related files
Details
N
Average concentration of nitrogen by weight

Concentration of a trace element in seawater. Does not include trace metals and metaloids.  Refer to dataset for element name and units.

Periodic Table

N_stdev [trace_element_conc]
Details
N_stdev
Standard deviation of the concentration of nitrogen by weight

Concentration of a trace element in seawater. Does not include trace metals and metaloids.  Refer to dataset for element name and units.

Periodic Table

Details
Fe_R
Average refractory concentration of iron
Concentration of a trace metal in seawater. Refer to dataset for element name and units.
Fe_R_stdev [trace_metal_conc]
Details
Fe_R_stdev
Standard deviation of the refractory concentration of iron
Concentration of a trace metal in seawater. Refer to dataset for element name and units.
Details
Cr_R
Average refractory concentration of chromium
Concentration of a trace metal in seawater. Refer to dataset for element name and units.
Cr_R_stdev [trace_metal_conc]
Details
Cr_R_stdev
Standard deviation of the refractory concentration of chromium
Concentration of a trace metal in seawater. Refer to dataset for element name and units.
Details
Cu_R
Average refractory concentration of copper
Concentration of a trace metal in seawater. Refer to dataset for element name and units.
Cu_R_stdev [trace_metal_conc]
Details
Cu_R_stdev
Standard deviation of the refractory concentration of copper
Concentration of a trace metal in seawater. Refer to dataset for element name and units.
Details
Mn_R
Average refractory concentration of manganese
Concentration of a trace metal in seawater. Refer to dataset for element name and units.
Mn_R_stdev [trace_metal_conc]
Details
Mn_R_stdev
Standard deviation of the refractory concentration of manganese
Concentration of a trace metal in seawater. Refer to dataset for element name and units.
Details
Zn_R
Average refractory concentration of zinc
Concentration of a trace metal in seawater. Refer to dataset for element name and units.
Zn_R_stdev [d13C]
Details
Zn_R_stdev
Standard deviation of the refractory concentration of zinc

Delta 13C (d13C) is the ratio of stable isotopes 13C:12C, reported in parts per thousand (per mil, 0/00).

d13C [d13C]
Details
d13C
Ratio of stable isotopes 13C:12C; reference standard Vienna Pee Dee Belemnite (VPDB)

Delta 13C (d13C) is the ratio of stable isotopes 13C:12C, reported in parts per thousand (per mil, 0/00).

d13C_stdev [d13C]
Details
d13C_stdev
Standard deviation of the ratio of stable isotopes 13C:12C; reference standard Vienna Pee Dee Belemnite (VPDB)

Delta 13C (d13C) is the ratio of stable isotopes 13C:12C, reported in parts per thousand (per mil, 0/00).

Dataset Maintainers

NameAffiliationContact
Charles Geoffrey WheatUniversity of Alaska Fairbanks (UAF)
James McManusUniversity of Akron (UAkron)
Beth N. OrcuttBigelow Laboratory for Ocean Sciences
Andrew T. FisherUniversity of California-Santa Cruz (UC Santa Cruz)
Samuel M. HulmeMoss Landing Marine Laboratories (MLML)
Amber YorkWoods Hole Oceanographic Institution (WHOI BCO-DMO)

BCO-DMO Project Info

Project Title Discovery, sampling, and quantification of flows from cool yet massive ridge-flank hydrothermal springs on Dorado Outcrop, eastern Pacific Ocean
Acronym Dorado Outcrop
URLhttps://www.bco-dmo.org/project/627844
Created November 30, 2015
Modified December 1, 2015
Project Description

Description from NSF award abstract:
Pristine fluids from a typical ridge-flank hydrothermal system have never been sampled, mainly because it has not been possible to locate a site of focused discharge where representative samples could be collected. The PIs have located a small basement feature, Dorado outcrop, on 23 m.y.-old seafloor on the eastern flank of the East Pacific Rise that they plan to sample to determine the fluid composition, and to assess the rate of discharge from the outcrop, so that they can quantify the chemical impact of this hydrothermal system. They plan an 18-day expedition that combines the surveying capabilities of the AUV Sentry (bathymetric, sub-bottom sonar, photo mosaics, water column anomalies) and an ocean-class vessel capable of collecting high-quality multi-beam data and CTD samples, and supporting the survey and sampling capabilities of the ROV Jason II for collection of spring and plume fluids, heat flow data, sediment push cores, and still and video photography. These data and samples will be combined hopefully to generate the first well-constrained estimates of hydrothermal flows from Dorado outcrop. This expedition will result in the collection of samples and data from a “fire hose” of ridge-flank, hydrothermal system, challenging the commonly held view that discharge from ridge flank hydrothermal systems occurs primarily from diffuse seeps.

Data Project Maintainers
NameAffiliationRole
Charles Geoffrey WheatUniversity of Alaska Fairbanks (UAF-IMS)Principal Investigator
Andrew T. FisherUniversity of California-Santa Cruz (UC Santa Cruz)Principal Investigator
Samuel M. HulmeMoss Landing Marine Laboratories (MLML)Principal Investigator
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