IODP

doi:10.14379/iodp.sp.359.2014

Site summaries (continued)

Site MAL-05A

Priority: Primary
Position: 4.766388N, 72.983889E
Jurisdiction: Maldives
Water depth (m): 380
Target drilling depth (mbsf): 420
Approved maximum penetration (mbsf): 420
Survey coverage (track map; seismic profile): Location map (Fig. F13)
Primary line(s): Line 62 (Fig. F16)
Objective(s): 1. Provide detailed reconstruction of the predrowning, drowning, and postdrowning evolution of the carbonate bank by linking the seismic stratigraphic record to the sedimentary record
2. Constrain the timing of this evolution, allowing age assignments of unconformities, sedimentary interruptions, sedimentary turnovers, and onset of drift deposition
3. Reconstruct and date bank to drift turnover
Drilling program: Single APC/XCB to ~170 mbsf (based on seismic).
Hole A: orientation and APCT-3 measurements
Hole B: drill to ~170 with RCB and center bit and with RCB to 420 mbsf
Logging and downhole measurement program: Wireline log with triple combo and FMS-sonic
Nature of rock anticipated: Calcareous ooze, chalk, limestone