Table T17. HYACINTH pressure coring summary, Holes 1249D, 1249F, 1249G, 1249H, and 1249L.
Core
Deployment
number
Date
(Aug 2002)
Local time
(hr)
Depth
BSR
(mbsf)
Lithology
Core recovered
(cm)
Presssure bar
(bar)
Comments
Water (mbsl)
Core
(mbsf)
204-1249D-








2Y FPC 5 5 0305 777 8 115 Massive hydrate and soft clays near seabed 80(bagged) Pressure lost then rose to 20 kbar Cut good core; could not transfer because of gas expansion; mousse put in bag; hydrate visible
204-1249F-








2E HRC 4 5 1130 777 8 115 Massive hydrate and soft clays near seabed 88 Full 80 kbar, then rose briefly to over 250 kbar during disassembly Hydrate core; 101 liters of gas collected
13Y FPC 6 6 0230 777 70 115 Unconsolidated silty clay 91 0 Cut good core, full retraction lower valve did not seal
204-1249G-








2E HRC 7 28 0230 777 13.5 115 Massive hydrate and soft clays near seabed 75 80 Good core; much hydrate; lost 25 cm from catcher; tilted, frozen, and transferred to line 2
204-1249H-








2Y FPC 10 28 1000 777 13.5 115 Massive hydrate and soft clays near seabed 75 80 Hydrate core with free gas
204-1249L-








5E HRC 8 29 1925 777 37.5 115 Soft clays and hydrate 30 30 kbar pumped to 90 kbar Lost pressure briefly on disassembly

Note: BSR = bottom-simulating reflector, FPC = Fugro Pressure Corer, HRC = HYACE Rotary Corer.