SITE SUMMARIES

Priority: 1 (primary)
Position: 34°58.94'N, 172°8.98'E
Water Depth: 1331 m
Sediment Thickness: 80 m
Target Drilling Depth: >230 m
Approved Maximum Penetration: 380 mbsf
Seismic Coverage: Glomar Challenger Leg 32 Sept 16, '73 0515 UTC

Seismic line for Site HE-6A

Objectives: The objectives of Site HE-6A are to:

1.Obtain a paleolatitude and age of Koko Seamount to investigate processes responsible for Late Cretaceous-early Tertiary differences between paleomagnetic data and predictions based on the Hawaiian-Emperor chain

2. Determine the geochemical signature of Koko Seamount

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

4. Determine the paleointensity of the geomagnetic field

Drilling Program: RCB

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

Nature of Rock Anticipated: Altered volcanic silt to biogenic volcanic sandstone, and alkali and tholeiitic basalt