Cruise inventory

RRS Discovery D342

Cruise summary report

Cruise Info. 
Ship name (ship code)RRS Discovery (74E3)
Cruise identifierD342
Cruise period2009-08-18 — 2009-09-18
StatusCompleted
Port of departureGlasgow, United Kingdom
Port of returnGlasgow, United Kingdom
PurposeResearch
ObjectivesSite survey work (shallow seismic survey and gravity core sampling) at 16 sites of proposed drilling in the North Atlantic (Irish and UK waters). Additional seismic work and sampling in the area was undertaken, details below.

Gravity and magnetic data were recorded during seismic surveys and also over 4 transects across the Rockall Trough and Rockall Hatton Basin.
Chief scientistAlick Leslie (British Geological Survey, Edinburgh)
Cruise reportRRS Discovery D342 cruise report d342.pdf — access key 'C' (3.61 MB) 
Ocean/sea areas 
GeneralNorth East Atlantic Ocean (limit 40W)
SpecificRockall Trough; Rockall Hatton Basin
Track chartsRRS Discovery D342 cruise track — d342trk.pdf (00 MB) 
Measurements 
Physical oceanography 
BathythermographQuantity: number of profiles = 102
Description: XBT. Vertical P/T profiles through water column taken during seismic survey
Geology and geophysics 
Core - soft bottomQuantity: number of cores = 16
Description: Site survey work in North Atlantic, high resolution seismic survey and 3m cores. 7 sites in Irish waters (on the Irish Shelf, Porcupine Bank and Rockall Bank) and 9 sites in UK waters (Rockall Bank, Rockall Hatton Basin and Hatton Bank).
Core - soft bottomQuantity: number of cores = 1
Description: 5m core in Rockall Trough, taken to compliment existing samples in ongoing research.
Single channel seismic reflectionQuantity: number of cores = 16
Description: Site survey work in North Atlantic, high resolution seismic survey and 3m cores. 7 sites in Irish waters (on the Irish Shelf, Porcupine Bank and Rockall Bank) and 9 sites in UK waters (Rockall Bank, Rockall Hatton Basin and Hatton Bank).
Single channel seismic reflectionQuantity: track kilometres = 50
Description: 3 short seismic lines over Anton Dohrn Seamount.
Single channel seismic reflectionQuantity: track kilometres = 430
Description: 3 regional seismic survey lines in North Atlantic over George Bligh Bank
Gravity measurementsQuantity: number of profiles = 4
Description: 4 gravity / magnetic profiles over Rockall Trough and Rockall Hatton Basin = 1448 km
Gravity measurementsQuantity: number of cores = 16
Description: Site survey work in North Atlantic, high resolution seismic survey and 3m cores. 7 sites in Irish waters (on the Irish Shelf, Porcupine Bank and Rockall Bank) and 9 sites in UK waters (Rockall Bank, Rockall Hatton Basin and Hatton Bank).
Gravity measurementsQuantity: track kilometres = 430
Description: 3 regional seismic survey lines in North Atlantic over George Bligh Bank
Gravity measurementsQuantity: track kilometres = 50
Description: 3 short seismic lines over Anton Dohrn Seamount.
Magnetic measurementsQuantity: number of cores = 16
Description: Site survey work in North Atlantic, high resolution seismic survey and 3m cores. 7 sites in Irish waters (on the Irish Shelf, Porcupine Bank and Rockall Bank) and 9 sites in UK waters (Rockall Bank, Rockall Hatton Basin and Hatton Bank).
Magnetic measurementsQuantity: track kilometres = 50
Description: 3 short seismic lines over Anton Dohrn Seamount.
Magnetic measurementsQuantity: number of profiles = 4
Description: 4 gravity / magnetic profiles over Rockall Trough and Rockall Hatton Basin = 1448 km
Magnetic measurementsQuantity: track kilometres = 430
Description: 3 regional seismic survey lines in North Atlantic over George Bligh Bank