SITE SUMMARIES

Priority: 2 (alternate)
Position: 51°11.9'N, 167°46.1'E
Water Depth: 2400 m
Sediment Thickness: 840 m
Target Drilling Depth: 980 m
Approved Maximum Penetration: 1140 mbsf
Seismic Coverage: Roundabout 6 Aug 14 0435 UTC

Seismic line for Site HE-3

Objectives: The objectives of Site HE-3 are to:

1.Obtain a paleolatitude and age estimate for Detroit Seamount with enough independent time units (>15) to provide increased resolution in tests of the fixed hotspot hypothesis

2. Determine the geochemical signature of the Detroit Seamount

3. Determine the nature of the time-averaged geomagnetic field

4. Determine the paleointensity of the geomagnetic field

5. Constrain downhole magnetic structure through borehole magnetic logging

Drilling Program: RCB

Logging and Downhole: Triple combo, FMS, third-party magnetic tool

Nature of Rock Anticipated: quartz/diatom clay, diatom clay/ooze, diatom ooze with calcareous diatom ooze, volcanic ash, chalk, altered ash and claystone, and tholeiitic olivine basalt