Dataset: Lost City AT42-01 Collected Fluids
Deployment: AT42-01

Samples collected and their associated temperatures on an expedition to the Lost City hydrothermal field

Principal Investigator:

Susan Q. Lang (University of South Carolina)

Co-Principal Investigator:

William Brazelton (University of Utah)

Gretchen Fruh-Green (ETH-Zurich, ETH)

Deborah Kelley (University of Washington, UW)

Marvin Lilley (University of Washington, UW)

BCO-DMO Data Manager:

Shannon Rauch (Woods Hole Oceanographic Institution, WHOI BCO-DMO)

Project:

Collaborative Research: Investigating the Lost City as an ultramafic urban center of the subseafloor, fueled by energy and carbon from the mantle (Lost City Limits to Life)

Current State:

Final no updates expected

Data URL:

https://osprey.bco-dmo.org/dataset-deployment/782202/data

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Description

Summary of samples collected by the Hydrothermal Organic Geochemistry (HOG) sampler on AT-4201 with ROV Jason, on dives J2_1107 through J2_1111, during R/V Atlantic cruise AT42-01, September 9 - October 1, 2018.

Methods & Sampling

Dataset acquisition description

Fluid samples were collected into either 2 L or 11 L kynar bags that were acid washed (10% HCl soak overnight, followed by through rinsing, overnight Milli-Q soak, and further rinsing). Sample for geochemistry were collected unammended. Samples for microbiology were pre-spiked with 13C-labeled formate, bicarbonate, or methane, or with preservative. Additional samples were collected by filtering fluids in situ through sterivex filters.

Average T refers to the average of the fluid temperature measured while the sample was being collected. Temperatures were measured with NKE Instrumentation Temperature sensors (P/N S2T6000-Ti-DH; P/N 60-07-326-002). "N.D." is no data.

Data Processing Description

Dataset Processing Description

BCO-DMO Processing:
- created Sample_Descrip column;
- re-formatted date to yyyy-mm-dd;
- added start and end date/time columns in ISO 8601 format;
- replaced commas with semi-colons in the Comment column.

More information about this dataset deployment

Funding

Award Number	Funding Source
OCE-1535962	NSF Division of Ocean Sciences
OCE-1536405	NSF Division of Ocean Sciences
OCE-1536702	NSF Division of Ocean Sciences

Instruments

ROV Jason

Supplied Name:

Supplied Description:

The Hydrothermal Organic Geochemistry (HOG) sampler was designed to collect hydrothermal fluids for biogeochemical and microbiological analyses. It consists of seven 2-liter and two 11-liter sample chambers for natural abundance geochemistry connected to a titanium intake nozzle with an in situ temperature probe. A second titanium intake nozzle with an in situ temperature probe is connected to seven 2-liter sample chambers devoted to incubation experiments, and five Sterivex filters for trapping microbial cell-sized particles. The HOG Sampler was deployed on all but one dive and is described in more detail in the methods section of the cruise report. Temperatures were measured with NKE Instrumentation Temperature sensors (P/N S2T6000-Ti-DH; P/N 60-07-326-002).

Instrument Type

Generic Name: ROV Jason

Generic Description:

The Remotely Operated Vehicle (ROV) Jason is operated by the Deep Submergence Laboratory (DSL) at Woods Hole Oceanographic Institution (WHOI). WHOI engineers and scientists designed and built the ROV Jason to give scientists access to the seafloor that didn't require them leaving the deck of the ship. Jason is a two-body ROV system. A 10-kilometer (6-mile) fiber-optic cable delivers electrical power and commands from the ship through Medea and down to Jason, which then returns data and live video imagery. Medea serves as a shock absorber, buffering Jason from the movements of the ship, while providing lighting and a bird’s eye view of the ROV during seafloor operations. During each dive (deployment of the ROV), Jason pilots and scientists work from a control room on the ship to monitor Jason’s instruments and video while maneuvering the vehicle and optionally performing a variety of sampling activities. Jason is equipped with sonar imagers, water samplers, video and still cameras, and lighting gear. Jason’s manipulator arms collect samples of rock, sediment, or marine life and place them in the vehicle’s basket or on "elevator" platforms that float heavier loads to the surface. More information is available from the operator site at URL.

Parameters

Supplied Name	Supplied description	Supplied Units	Standard Name
Sample_Descrip	Sample description	unitless	sample_descrip
Sample_ID	Sample identifier	unitless	sample
Sample_Type	Sample type	unitless	sample_type
Site	Site name	unitless	site
Date_GMT	Date (GMT); format: yyyy-mm-dd	unitless	date
Start_Time_GMT	Start time (GMT); format: HH:MM	unitless	time
End_Time_GMT	End time (GMT); format: HH:MM	unitless	time
Average_T	Average temperature	degrees Celsius	temp
Highest_T	Highest temperature	degrees Celsius	temp
Comment	Comment/notes	unitless	comment
ISO_DateTime_Start_GMT	Date and time at start (GMT) formatted ISO 8601 standard; format: yyyy-mm-ddTHH:MM:SSZ	unitless	ISO_DateTime_UTC
ISO_DateTime_End_GMT	Date and time at end (GMT) formatted ISO 8601 standard; format: yyyy-mm-ddTHH:MM:SSZ	unitless	ISO_DateTime_UTC
Latitude	Latitude	decimal degrees North	lat
Longitude	Longitude (negative values = West)	decimal degrees East	lon

Database

Contribute Data

Dataset: Lost City AT42-01 Collected Fluids
Deployment: AT42-01

Dataset acquisition description

Dataset Processing Description

Database

Contribute Data

Dataset: Lost City AT42-01 Collected FluidsDeployment: AT42-01

Dataset acquisition description

Dataset Processing Description

Dataset: Lost City AT42-01 Collected Fluids
Deployment: AT42-01