| Identifier | 2019-619-FA | ||||||||
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| Alternate names | 2019-001-FA | ||||||||
| Purpose | ROV and geophysical studies of methane seepage on the Cascadia margin | ||||||||
| Location | U.S. Cascadia (Pacific Northwest) margin, offshore Washington and Oregon | ||||||||
| Summary | location of seeps (EK60), seafloor maps (MB), gas composition, age and geochemistry of carbonates, and chemosynthetic food web composition | ||||||||
| Info derived | seafloor maps, methane flux, methane oxidation rate, chemosynthetic habitats | ||||||||
| Comments | Entries for this field activity are based on entries from Field Activity 2019-001-FA Project: USGS GAS HYDRATES (LQ000FP). This was a competitively chosen project for which Schmidt Ocean Institute is providing about $1 million in shiptime on the global class R/V Falkor. We are responsible for travel, shipping, other science, overtime, etc. | ||||||||
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| Marine operations | Yes |
| Organization |
2885 Mission Street
Santa Cruz, CA95060
(831) 460-7401
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| Principal investigators | Nancy G Prouty | ||
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| Affiliate principal | Nancy Prouty (PCMSC); Amanda Demopoulos (WARC, Gainesville); Carolyn Ruppel (WH); Tamara Baumberger (PMEL-NOAA); Jens Greubert (GEOMAR), Howard Mendlovitz (UNC) |
| Data category: | Sampling, Environmental Data, Location-Elevation, Sonar |
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| Data type: | Geology, CTD, Navigation, Multibeam, Single Beam |
| Equipment | Usage description | Data types | Datasets |
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| sampling equipment | Biology, Chemistry, Geology, Experiments (biological), Sediment Properties | 3 | |
| CTD - FSI | CTD, Mooring (physical oceanography) | 1 | |
| GPS | Navigation | (no data reported) | |
| Other | Unknown, Multibeam, Single Beam, Sidescan, Interferometric, Sound Velocity | (no data reported) |
| Dataset name | Equipment | Description | Dataset contact |
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| Lipid biomarker analyses | sampling equipment | Carbonate lipid biomarkers (n-alkanes, fatty acids, and fatty alcohols/sterols) were determined in carbonate rocks collected on the FK190612 research expedition in the north Pacific Ocean along the Cascadia Margin on in June and July 2019 | Nancy G Prouty |
| Sediment core pore fluid chemistry measurements | sampling equipment | Geochemical analysis of sediment core pore fluids collected from seep fields on the FK190612 research expedition in the north Pacific Ocean along the Cascadia margin in June 2019. Samples were collected to deconvolve the different processes impacting the fluid chemistry, including hydrate dissociation and clay mineral dehydration during the smectite-illite transformation that releases inter-layer water. | Nancy G Prouty |
| CTD profile measurements collected along the Cascadia margin for the FK190612 expedition in June 2019 | CTD - FSI | CTD (Conductivity Temperature Depth) data were collected along the Cascadia margin for the FK190612 expedition in June 2019 | Nancy G Prouty |
| Dataset name | Equipment | Description | Dataset contact |
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| Geochemistry of authigenic carbonates from Cascadia Margin | sampling equipment | Geochemical analysis of authigenic carbonates from the Cascadia Subduction Zone. Powdered carbonate samples for stable carbon (delta-C-13) and oxygen (delta-O-18) isotopes and carbonate phase were analyzed as a proxy for potential fluid sources, and to better understand how process, such as mixing, and oxidation, can alter the initial fluid isotopic composition and the archived fluid-source signature in the authigenic carbonates. | Nancy G Prouty |