Online Links:
Value | Definition |
---|---|
HRS15-12 | The 12th expedition aboard the R/V Hugh R. Sharp in 2015, an investigation of Atlantic Margin methane hydrate dynamics. 09/06/2015 to 09/17/2015. FA-2015-005. |
IODP Expedition 311 | Integrated Ocean Drilling Program Expedition 311, an investigation of methane hydrate distribution along a margin perpendicular transect of the northern Cascadia margin. 08/28/2005 to 10/28/2005 |
NGHP-02 | National Gas Hydrate Program Expedition 02, an assessment of gas hydrate along the eastern coast of India. 03/03/2015 to 07/28/2015 |
Value | Definition |
---|---|
U.S. Atlantic Margin | Continental shelf and slope of the U.S. Atlantic margin from offshore Virginia to Long Island New York, United States |
Northern Cascadia Margin | Continental margin offshore of Vancouver Island, British Columbia Canada |
Indian Ocean | Western continental margin of the Indian Ocean at the Krishna-Godavari and Mahanadi basins |
Range of values | |
---|---|
Minimum: | 15.4462 |
Maximum: | 48.7896 |
Units: | decimal degrees |
Resolution: | .0001 |
Range of values | |
---|---|
Minimum: | -126.6787 |
Maximum: | 84.2079 |
Units: | decimal degrees |
Resolution: | .0001 |
Value | Definition |
---|---|
Hudson Canyon | Shelf incising submarine canyon on the US Atlantic margin offshore of New York U.S. |
Baltimore Canyon | Shelf incising submarine canyon on the US Atlantic margin offshore of Maryland U.S. |
Chincoteague Slope | A portion of the U.S. Atlantic margin continental slope offshore of Virginia U.S. |
U1329C | IODP drilling location near the shelf/slope break on the northern Cascadia margin offshore of Vancouver Island, British Columbia Canada |
Site X, Area Y | Scientific drilling locations where “X” is the site number specified during the Indian National Gas Hydrate Program Expedition 2 (NGHP-02) and “Y” is the alphanumeric specific permit area within the site |
Value | Definition |
---|---|
Piston Core | A device that collects a continuous sediment core extending from the sediment water interface to meters below the sea floor |
Multicore | A device that collects multiple short sediment cores extending from the sediment water interface to less than 1 m below the sea floor |
CTD | Conductivity-Temperature-Depth profiler that was integrated with number of Niskin-type water sampling bottles used to collect water samples from discrete depths in the ocean |
APC | Advanced piston core (APC) used to collect ~ 10 m sediment core sections in the upper portion of a scientific drilling hole where the sediments are unconsolidated |
RCB | Rotary core barrel (RBC) used to collected ~10 ml sediment core sections in the lower portion of a scientific drilling hole where sediments are too consolidate for the APC |
PCS | Pressure core system (PCS) used to collect up to 3 m long sediment sections and maintain the in-situ reservoir pressure during recovery. Used frequently during gas hydrate studies to recover and maintain cores with gas hydrate intact for detailed physical and chemical property studies |
Range of values | |
---|---|
Minimum: | 9/26/2005 |
Maximum: | 9/18/2015 |
Units: | calendar date (MM/DD/YEAR) |
Resolution: | 1 |
Value | Definition |
---|---|
Sediment pore water | Sediment from the core collected with a 5 ml cut-off syringe, placed in a 30 ml serum vial and capped with a stopper. After the addition of 5 ml brine and a 2 min agitation period, 5 ml gas was removed from the vial and analyzed |
Water column | 900 ml samples collected in 1L syringes. 100 ml headspace added to the syringe and after a 2 min agitation period the gas was removed and analyzed |
Sediment void gas | Gas from expansion cracks in a sediment core extracted from a hole pierced in the core liner in a syringe and transferred to an evacuated 30 ml stoppered serum. The analyzed sample was removed from the vial |
Sediment pressure core sampler gas | Gas samples released from the pressure core were collected in a syringe and transferred to a 30 ml evacuated serum vial. The analyzed sample was removed from the vial |
Range of values | |
---|---|
Minimum: | 0.32 |
Maximum: | 1033 |
Units: | meter |
Resolution: | .01 |
Range of values | |
---|---|
Minimum: | 9/9/2015 |
Maximum: | 3/15/2019 |
Units: | Date DD/MM/YEAR |
Value | Definition |
---|---|
Loop B Load/Analysis | The sample was introduced into DSIM through Loop B and subsequently diluted and analyzed in the Loop B analysis configuration |
Loop B Load/Analysis | The sample was diluted by a factor of 10 in a syringe and then introduced into DSIM through Loop B and subsequently diluted and analyzed in the Loop B analysis configuration |
System Load/Analysis | The sample was diluted by a factor of 10 in a syringe and then introduced into DSIM through Loop B and subsequently diluted and analyzed in the Loop B analysis configuration |
System Load/Analysis | A 100 ml sample was loaded into the DSIM analytical loop and then analyzed without dilution in the System Analysis configuration |
Loop A Exp Load/Analysis | The sample was introduced into DSIM through Loop A and subsequently diluted and analyzed in the Loop A analysis with expansion volume enable configuration |
Loop B Load/Analysis | The sample was diluted by a factor of 10 in a syringe and then introduced into DSIM through Loop B and subsequently diluted and analyzed in the Loop B analysis configuration |
Range of values | |
---|---|
Minimum: | 13.84 |
Maximum: | 1981 |
Units: | parts per million |
Resolution: | 0.01 |
Value | Definition |
---|---|
n/a | Data not recorded |
Range of values | |
---|---|
Minimum: | 0.01 |
Maximum: | 53.72 |
Units: | parts per million |
Resolution: | 0.01 |
Range of values | |
---|---|
Minimum: | 14.1 |
Maximum: | 875304.64 |
Units: | parts per million |
Resolution: | 0.01 |
Range of values | |
---|---|
Minimum: | 0.02 |
Maximum: | 4537.93 |
Units: | nanomoles per liter (nM) |
Resolution: | 0.01 |
Range of values | |
---|---|
Minimum: | -90.29 |
Maximum: | -39.82 |
Units: | per mille |
Resolution: | 0.01 |
Range of values | |
---|---|
Minimum: | 0.23 |
Maximum: | 3.79 |
Units: | per mille |
Resolution: | 0.01 |
Range of values | |
---|---|
Minimum: | -89.44 |
Maximum: | -41 |
Units: | per mille |
Resolution: | 0.02 |
Value | Definition |
---|---|
WHOI IRMS Facility | Measured at the Woods Hole Oceanographic Institution stable isotope lab |
Pohlman and others (2009) | Values previously published in Pohlman and others (2009), Methane sources and production in the northern Cascadia margin gas hydrate system, Earth and Planetary Science Letters. doi:10.1016/j.epsl.2009.08.037 |
Value | Definition |
---|---|
HRS15-12 | The 12th expedition aboard the R/V Hugh R. Sharp in 2015, an investigation of Atlantic Margin methane hydrate dynamics. 09/06/2015 to 09/17/2015. FA-2015-005. |
Value | Definition |
---|---|
US Atlantic Margin | Continental shelf and slope of the U.S. Atlantic margin from offshore Virginia to Long Island New York, United States |
Range of values | |
---|---|
Minimum: | 15.4462 |
Maximum: | 48.7896 |
Units: | decimal degrees |
Resolution: | .0001 |
Range of values | |
---|---|
Minimum: | -74.2960 |
Maximum: | -74.2960 |
Units: | decimal degrees |
Resolution: | .0001 |
Value | Definition |
---|---|
Hudson Canyon | Shelf incising submarine canyon on the U.S. Atlantic margin offshore of New York US |
Baltimore Canyon | Shelf incising submarine canyon on the U.S. Atlantic margin offshore of Maryland U.S. |
Chincoteague Slope | A portion of the U.S. Atlantic margin continental slope offshore of Virginia U.S. |
U1329C | IODP drilling location near the shelf/slope break on the northern Cascadia margin offshore of Vancouver Island, British Columbia Canada |
Site X, Area Y | Scientific drilling locations where “X” is the site number specified during the Indian National Gas Hydrate Program Expedition 2 (NGHP-02). And “Y” is the alphanumeric specific permit area within the site. within specific permit areas |
Range of values | |
---|---|
Minimum: | 370 |
Maximum: | 370 |
Units: | meters (m) |
Resolution: | 1 |
Range of values | |
---|---|
Minimum: | 1.24 |
Maximum: | 373.00 |
Units: | meters (m) |
Resolution: | 0.02 |
Range of values | |
---|---|
Minimum: | 9/12/15 |
Maximum: | 9/12/15 |
Range of values | |
---|---|
Minimum: | 3.09 |
Maximum: | 74.67 |
Units: | nanomoles per liter (nM) |
Resolution: | 0.01 |
Range of values | |
---|---|
Minimum: | 2.68 |
Maximum: | 79.12 |
Units: | nanomoles per liter (nM) |
Resolution: | 0.01 |
Range of values | |
---|---|
Minimum: | 0.01 |
Maximum: | 0.26 |
Units: | nanomoles per liter (nM) |
Resolution: | 0.01 |
Range of values | |
---|---|
Minimum: | -87.18 |
Maximum: | -44.84 |
Units: | per mille |
Resolution: | 0.01 |
Range of values | |
---|---|
Minimum: | 0.84 |
Maximum: | 12.85 |
Units: | per mille |
Resolution: | 0.01 |
Range of values | |
---|---|
Minimum: | 395.8 |
Maximum: | 715.4 |
Units: | parts per million |
Resolution: | 0.1 |
Range of values | |
---|---|
Minimum: | 0.5 |
Maximum: | 3.9 |
Range of values | |
---|---|
Minimum: | -12.05 |
Maximum: | -9.28 |
Units: | per mille |
Resolution: | 0.01 |
Range of values | |
---|---|
Minimum: | 0.49 |
Maximum: | 1.47 |
Units: | per mille |
Resolution: | 0.01 |
Development of the DSIM was supported by the U.S. Geological Survey’s Gas Hydrates Project. Samples from the U.S. Atlantic margin were collected with support from USGS-DOE Interagency Agreements DE-FE0005806 and DE-FE0023495.We appreciate suggestions and technical support provided by Lee-Gray Boze and Sean Sylva.
The data were collected to demonstrate the results obtained with the DSIM-CRDS system are comparable to those from traditional analytical methods. The samples were collected from sediment and water column samples along the United States Atlantic Margin, sediments from the northern Cascadia margin and the Indian Ocean. In addition to validating the method developed, the data also provide fundamental measurements from these sites.
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Are there legal restrictions on access or use of the data?Access_Constraints: None. Please see 'Distribution Info' for details.
Use_Constraints:None. Users are advised to read the dataset's metadata thoroughly to understand appropriate use and data limitations.
Unless otherwise stated, all data, metadata and related materials are considered to satisfy the quality standards relative to the purpose for which the data were collected. Although these data and associated metadata have been reviewed for accuracy and completeness and approved for release by the U.S. Geological Survey (USGS), no warranty expressed or implied is made regarding the display or utility of the data on any other system or for general or scientific purposes, nor shall the act of distribution constitute any such warranty.
Data format: | The dataset contains 2 data files - each in an XLSX and CSV format. Additionaly, CSDGM metadata describes the data files. in format XLSX |
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Network links: |
https://www.sciencebase.gov/catalog/file/get/60d60d72d34e960393674818 https://www.sciencebase.gov/catalog/item/60d60d72d34e960393674818 https://doi.org/10.5066/P99B34V1 |
Data format: | The dataset contains 2 data files - each in an XLSX and CSV format. Additionaly, CSDGM metadata describes the data files. in format CSV |
---|---|
Network links: |
https://www.sciencebase.gov/catalog/file/get/60d60d72d34e960393674818 https://www.sciencebase.gov/catalog/item/60d60d72d34e960393674818 https://doi.org/10.5066/P99B34V1 |