Site CAS-04B
Proposed site:
CAS-04B
Priority:
Alternate
Position:
48°33.461'N, 127°09.934'W
Water depth (m):
2560
Target drilling depth (mbsf):
400
Approved maximum penetration (mbsf):
400
Survey coverage:
Regional site survey lines
• PGC9902_CAS04_SC
• PGC9902_ODP7_MCS
• Line 89-08
Figure F11
Objective:
Site CAS-04B is the reference site for the transect. It is located in the Cascadia abyssal plain, ~3 km west of the deformation front. It is similar to Site 888 of ODP Leg 146.
Primary targets are determining the pore water chemistry profile and sediment physical properties from core and logging data.
Drilling and Logging program
APC to refusal; XCB; PCS and HYACINTH (pending funding) pressure cores
Logging program
LWD, triple combo, FMS-sonic, multiple use of APCT, DVTPP
Nature of rock anticipated:
Interlayered silts and clays, some authigenic carbonates possible