Abstract:

This dataset contains the geochemical analysis of water samples collected at two locations in the Orca Basin aboard the R/V Endeavor cruise EN585 in the Gulf of Mexico on 2016-07-29. The geochemical analysis included dissolved organic carbon (DOC), chloride, sodium, potassium, magnesium, and calcium. Salinity was also calculated. The objective was to assess the impacts of the Deepwater Horizon blowout on water chemistry on fallout sites and compare these impacts to naturally occurring oil and gas seeps. This dataset supports the publication: Diercks, A., Ziervogel, K., Sibert, R., Joye, S. B., Asper, V., & Montoya, J. P. (2019). Vertical marine snow distribution in the stratified, hypersaline, and anoxic Orca Basin (Gulf of Mexico). Elem Sci Anth, 7(1), 10. doi:10.1525/elementa.348

Suggested Citation:

Samantha Joye. 2019. Geochemical data collected from R/V Endeavor cruise EN585 at the Orca Basin in the Gulf of Mexico on 2016-07-29. Distributed by: GRIIDC, Harte Research Institute, Texas A&M University–Corpus Christi. doi:10.7266/n7-3bp5-sb94

Publications:

Diercks, A., Ziervogel, K., Sibert, R., Joye, S. B., Asper, V., & Montoya, J. P. (2019). Vertical marine snow distribution in the stratified, hypersaline, and anoxic Orca Basin (Gulf of Mexico). Elem Sci Anth, 7(1), 10. doi:10.1525/elementa.348

Purpose:

Geochemical data of water samples collected in the Orca Basin to assess the impacts of the Deepwater Horizon blowout on water chemistry on fallout sites and compare these impacts to naturally occurring oil and gas seeps.

Data Parameters and Units:

Location name, station number, event number, collection type (CTD), latitude, longitude, date (DD/MM/YY), time (hh:mm, Local), depth (m), Lab sample id, dissolved organic carbon [DOC, uM]; Chloride [mM]; Sodium [mM]; Potassium [mM]; Magnesium [mM]; Calcium [mM]; Salinity (unitless) was calculated: 0.0018066 * Cl– (mg/L); Chlorine molar mass (g/mol, value in cell H2).

Methods:

Water samples for laboratory measurement of dissolved organic carbon (DOC), chloride, sodium, potassium, magnesium, and calcium concentration were collected during CTD cast EN_005.03, in the northern Orca Basin. Geochemical analyses of these water samples were conducted in the laboratory.

Individual Files: