2014-011-FA (CMHRP activity #34)

Field Activity 2014-011-FA

Identifier

2014-011-FA

Alternate names

MGL1407

Purpose

To map sediment thickness in order to define the outer limits of the U.S. Extended Continental Shelf beyond 200 nautical miles; and to better understand landslide processes on the Atlantic margin.

Location

Atlantic Continental Margin, (NC to Maine), United States, North America, North Atlantic

Summary

Magnetics and gravity data, seismics and sonar.

Info derived

Sediment thickness, location of fracture zones

Comments

Draft environmental compliance documents and permits were completed in April. USGS EA for 2014-011-FA is posted at: https://woodshole.er.usgs.gov/project-pages/environmental_compliance/index.html

Projects

Law of the Sea - Outer Limits of the US Continental Margins

Platform

Marcus G. Langseth

235 feet long, 56-foot beam, 19.5 foot draft. Built in 1991.

Itinerary

Start	Newark, NJ	2014-08-13
End	Norfolk, VA	2014-09-05
Days in the field	16-21

Bounds

West	-78.3984
East	-67.421877
North	43.16512263
South	32.61671135

Personnel

Organization

USGS, Woods Hole Coastal and Marine Science Center(WHCMSC)

384 Woods Hole Road

Quissett Campus

Woods Hole, MA02543-1598

(508) 548-8700

Principal investigators

Deborah R HutchinsonNathaniel C Miller

Crew members

Deborah R Hutchinson	Scientist, Staff
Eric Moore	Scientist, Staff
Thomas F O'Brien	Scientist, Staff
Matthew Arsenault	Scientist, Staff
David S Foster	Scientist, Staff
Wayne E Baldwin	Scientist, Staff

Information specialist(s)

Matthew Arsenault

Specialist, Information

Data types and categories

Data category:	Electro-Magnetic, Location-Elevation, Seismics, Sonar
Data type:	Gravity, Magnetics, Navigation, Air Gun / Water Gun, Multichannel, Sub Bottom Profiler, Multibeam

Equipment used

Equipment	Usage description	Data types	Datasets
Multichannel seismics	8-km-long solid state digital hydrophone streamer - Sentry Solid Streamer Sercel hydrophone cable consists of 12 hydrophones, which are summed in analog, and the spacing between the center of these groups is 12.5 m. Streamer depth was set to 9 m for all lines	Multichannel	3
Air gun	36-element, 6600 cubic inch airgun source array configured in four parallel, 9-gun strings	Air Gun / Water Gun	(no data reported)
Knudsen echo sounder 320B/R		Sub Bottom Profiler	(no data reported)
Geometrics G-856 magnetometer		Magnetics	1
Bell Aerospace BGM-3 gravimeter		Gravity	(no data reported)
DGPS		Navigation	(no data reported)
Other		Unknown, Multichannel, Boomer, Sub Bottom Profiler, Sparker, Bubble Gun, Air Gun / Water Gun, Ocean Bottom Seismometer, Sonobuoy	(no data reported)
EM122 12 kHz multibeam		Multibeam	(no data reported)

Datasets

Datasets produced in this activity

Dataset name	Equipment	Description	Dataset contact
2014-011-FA_mcscmp	Multichannel seismics	Unique common mid-point (cmp) navigation for multi-channel seismic data collected by the U.S. Geological Survey on U.S. Atlantic Seaboard in 2014	Gregory K Miller
2014-011-FA_poststmsegy	Multichannel seismics	Post-stack migrated SEG-Y multi-channel seismic data collected by the U.S. Geological Survey in U.S. Atlantic Seaboard in 2014	Nathaniel C Miller
2014-011-FA_seistrk	Multichannel seismics	Trackline navigation for multi-channel seismic data collected by the U.S. Geological Survey on U.S. Atlantic Seaboard in 2014	Nathaniel C Miller
2014-011-FA_mag	Geometrics G-856 magnetometer	Marine magnetics data collected by the U.S. Geological Survey in U.S. Atlantic Seaboard in 2014	Nathaniel C Miller