| URL | https://www.bco-dmo.org/dataset/671199 |
|---|---|
| Download URL | https://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 |
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.
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)
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.
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 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.
Gravity core identifier
Core identification number or label; often used with ice, rock, sediment, or coral cores.
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)
Alvin submersible dive latitude; north is positive
latitude, in decimal degrees, North is positive, negative denotes South; Reported in some datasets as degrees, minutes
Alvin submersible dive longitude; east is positive
longitude, in decimal degrees, East is positive, negative denotes West; Reported in some datsets as degrees, minutes
Calcium Carbonate, in sediments as percent; or CaCO3 from water samples reported in various units; CAUTION measured in sediment and water column samples
Calcium Carbonate, in sediments as percent; or CaCO3 from water samples reported in various units; CAUTION measured in sediment and water column samples
Dissolved Inorganic Carbon
Dissolved Inorganic Carbon
Concentration of a trace element in seawater. Does not include trace metals and metaloids. Refer to dataset for element name and units.
Concentration of a trace element in seawater. Does not include trace metals and metaloids. Refer to dataset for element name and units.
Delta 13C (d13C) is the ratio of stable isotopes 13C:12C, reported in parts per thousand (per mil, 0/00).
Delta 13C (d13C) is the ratio of stable isotopes 13C:12C, reported in parts per thousand (per mil, 0/00).
| Name | Affiliation | Contact |
|---|---|---|
| Charles Geoffrey Wheat | University of Alaska Fairbanks (UAF) | ✓ |
| James McManus | University of Alaska Fairbanks (UAF) | ✓ |
| Beth N. Orcutt | University of Akron (UAkron) | |
| Andrew T. Fisher | University of Akron (UAkron) | |
| Samuel M. Hulme | Bigelow Laboratory for Ocean Sciences | |
| Amber York | University of California-Santa Cruz (UC Santa Cruz) | |
| Amber York | University of California-Santa Cruz (UC Santa Cruz) | |
| Samuel M. Hulme | Moss Landing Marine Laboratories (MLML) | |
| Samuel M. Hulme | Moss Landing Marine Laboratories (MLML) | |
| Amber York | Woods Hole Oceanographic Institution (WHOI BCO-DMO) |
| 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 |
| URL | https://www.bco-dmo.org/project/627844 |
| Created | November 30, 2015 |
| Modified | December 1, 2015 |
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.
| Name | Affiliation | Role |
|---|---|---|
| Charles Geoffrey Wheat | University of Alaska Fairbanks (UAF-IMS) | Principal Investigator |
| Andrew T. Fisher | University of California-Santa Cruz (UC Santa Cruz) | Principal Investigator |
| Samuel M. Hulme | Moss Landing Marine Laboratories (MLML) | Principal Investigator |
