Site summaries (continued)

Site JA-4A

Priority: Alternate
Position: 4010.00′N, 5138.00′W
Water depth (m): 4250
Target drilling depth (mbsf): 250
Approved maximum penetration (mbsf): Request 700; pending EPSP approval
Survey coverage: •Primary line: KNR 179-1, Line 5, SP 203 2145
•Crossing lines: KNR 179-1, Line 14, SP 206 1140
Objective: Middle of depth transect; lower to upper Eocene and possible Eocene/Oligocene boundary (the entire section of Eocene strata is ~700 m thick at this site, allowing potential deeper penetration than currently proposed); early Eocene warm period; Eocene hyperthermals; middle and late Eocene impacts; transition to icehouse climate; Eocene CCD; chemistry of Eocene deep water.
Coring program: •Hole A: APC/XCB to 250 mbsf with orientation and APCT-3
•Hole B: APC/XCB to 250 mbsf
•Hole C: APC/XCB to 250 mbsf
•See “Drilling strategy” and Tables T1, T3
Wireline logging program: •NA
•See “Downhole measurements strategy” and Tables T1, T3
Anticipated lithology: Carbonate ooze, hemipelagic clay, shallow-water carbonates