USGS Woods Hole Coastal and Marine Geology Science Center, MA Field Activity Page for 81033

Summary for Field Activity Number 81033

On-Line Data Resources:	Report	Navigation	GIS	Archive	Geophysics	Sidescan
On-Line Data Resources:	Metadata	Samples	Photography	Time-series	Seismics	Publications

Alternate Leg ID: GYRE-81-14, Leg 1

Area of Operations: Long Island Platform, New York, Connecticut, United States, North America, North Atlantic

Dates: September 15, 1981 to September 26, 1981

Chief scientist: John Grow, Debbie Hutchinson, Co-Chief Scientists

Objectives: Define the extent and size of rift valleys identified in the basement surface of the LI Platform from USGS lines 24, 9, and 36 using the high-resolution multichannel system. Collect refraction velocity measurements within the rift structures and along undisturbed basement using the USGS OBIPs. Collect gravity data in the NY Bight, Raritan Bay, and NY Harbor to better define the shape and magnitude of the offshore extent of the Piedmont Gravity High. Define the shape of the northern edge of the Baltimore Canyon Trough where it meets the LI Platform. Collect refraction velocity measurements along USGS Line 34 (continental slope) for a proposed ocean margin drill site. Test the resolution of the 240 m (12 channel) streamer with the 80 in3 watergun compared to the 120m (12 channel) streamer and 15 in3 watergun. Do signature tests for the 540 in3 airgun, the 80 in3 watergun, the 40 in3 airgun and the 15 in3 watergun.

Type of Activity: Sampling
Refraction data
Gravity data

Information to be derived: Samples and Chemical Analysis
Refraction data
Reflection data
Gravity data

Summary: Magnetic data: 15 km; Gravity data: 810 km (31 lines, 6 profiles); Seismic reflection data: 15 km of 12-channel, 247 km of 6-channel and 279 km of single-channel; Echosounding data: 810 km of 3.5-kHz; Refraction profiles: 20 km of watergun and 94 km of airgun; Samples: 1 core and 3 grabs; OBIPs deployed: 13; OBIPs recovered: 12; Sonobuoys deployed: 4.

USGS Project Number: 9840-01830

Contact: Debbie Hutchinson (dhutchinson@usgs.gov)

InfoBank: uses the identifier G-41-81-LI. Visit this site for more information.

Map for Area of Operations :

Map of field activity boundary.

Platform Info:

GYRE

Related Resources:	Station Descriptions	Seismic Line Descriptions	Track Plot	Related Web Site

The following materials for this field activity are available in the Information Archives:

Comprehensive listing of data items by form:

Inventory #	Form	Format	Amount	Source	Nature	Remarks
100950	LOGBOOK	TABLE	1	TECH	MONITOR
100951-100952	ENVELOPE	PROFILE	2	L&R GRAVITY METER	ANALOG
100953-100955	BINDER	PRNTOUT	1	INS-TTY	MONITOR
100956-100958	ENVELOPE	PRNTOUT	3	INS-TTY	VELOCITY
100959	ENVELOPE	GRAPH	1	GRAVIMETER	STRIP CHART
100960	ENVELOPE	GRAPH	1	L&R/BELL GRAVITY METER	STRIP CHART
100983	ENVELOPE	FORM	1	OBSERVER	LOG
100986-100992	PAPER ROLL	GRAPH	7	OSCILLOGRAPH	STRIP CHART	KODAK BOXES
101125	ENVELOPE	PRNTOUT	1	BELL	DIGITAL
101126	LOGBOOK	TABLE	1	TECH	MONITOR
101127	BINDER	TABLE	1	CURATOR	INVENTORY
101128-101130	ENVELOPE	PRNTOUT	3	BELL	ANALOG
101131	ENVELOPE	GRAPH	1	MAGNETOMETER	DIGITAL
103571	ENVELOPE	TABLE	1	TECH	TAPE RECORD
FD1567-FD1570	FOLDER	PROFILE	4	H2OGUN	ANALOG
FD1571-FD1573	FOLDER	PROFILE	3	3.5K	ANALOG
FD1574	FOLDER	PROFILE	1	AIR	ANALOG
MC0145-MC0211	MAGTAPE	DFS-V	69	MULTI-CHANNEL	DIGITAL
T 2387-T 2392	MAGTAPE	NSTAR	6	INS	DIGITAL
T 3780-T 3782	MAGTAPE		3	COMPUTER	DIGITAL	S153,S-159,S-163
TK0658	TRKCHT	MAP	1	NOS	ORIG
TK0695	TRKCHT	MAP	1	WATCHSTANDER	ORIG	*GYRE 81-13, LYNC 711-82

Paper/mylar track lines:

Inventory #	Projection	Scale	Form	Source	Map ID	Remarks
658	MER	80	PAPER	PLOT
695	MER	400	PAPER	ORIG		NOS #12300 *GYRE 81-13 (#81030), LYNC 711-82(#82022)
714	UTM	250	PAPER	PLOT	1	*NECH 82-3 (#82041), LYNC 711-82 (#82022

Paper seismic/sidescan bottom profiles:

Inventory #	Lines	Folder	Start Time	End Time	Profile Type	Remarks
01567	1-3	001	04:00 09/16/1981	05:59 09/20/1981	H2O- 80 IN 3	UNFILTERED,MULTI-CHANNEL
01568	1,2	002	04:15 09/16/1981	03:00 09/19/1981	H2O- 80 IN 3	FILTERED
01568	2,3	002	03:07 09/19/1981	05:59 09/20/1981	H2O- 80 IN 3	FILTERED
01569	5-16	003	23:24 09/20/1981	07:35 09/22/1981	H2O- 80 IN 3	SINGLE CHANNEL
01570	5,6	004	23:24 09/21/1981	03:28 09/21/1981	H2O- 80 IN 3	SINGLE CHANNEL
01570	7-16	004	03:28 09/21/1981	03:28 09/22/1981	H2O- 80 IN 3	SINGLE CHANNEL
01571	3-10	001	18:49 09/19/1981	17:00 09/21/1981	3.5K-
01571	1-36	001	16:00 09/15/1981	19:41 09/19/1981	3.5K-
01572	11-16,101-106*	002	19:81 09/21/1981	15:54 09/23/1981	3.5K-	*201
01573	301,401,17,18*	003	15:58 09/23/1981	20:43 09/26/1981	3.5K-	*25
01574	101-103,301,401	001	16:31 09/22/1981	20:22 09/26/1981	AIR-

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