Site HE-1A Summary | Table of Contents

Leg 197 Operations Plan and Time Estimate
Option 3              
Site Location Water Operations Description Transit Drilling Logging Total
No. Lat/Long Depth   (days) (days) (days) On-site
               
    (mbrf)          
Yokohama 35°16.80'N   Transit 1552 nmi from Yokohama, Japan, to Site HE-3B @ 11.0 kt 5.9      
  139°23.40'E            
               
HE-3B 50°48.60'N 2740 Drill ahead through sediment with a center bit to 300 mbsf   8.1 1.2 9.3
  167°33.00'E   RCB in sediment from 300 to 450 mbsf        
      RCB from 450 to 600 mbsf (150 m into basement) using        
      FFF for one bit change        
      Wireline logs (Triple combo, Mag Tool, and FMS)        
               
               
      Transit 11 nmi from Site HE-3B to Site HE-3A @ 11.0 kt 0.0      
               
HE-3A 50°57.00'N 2773 Drill ahead through sediment with a center bit to 300 mbsf   8.2 0.8 9.0
  167°44.40'E   RCB in sediment from 300 to 500 mbsf        
      RCB from 500 to 650 mbsf (150 m into basement) using        
      FFF for one bit change        
      Wireline logs (Triple combo and FMS)        
               
               
      Transit 580 nmi from Site HE-3A to Site HE-4B @ 10.5 kt 2.3      
               
               
HE-4B 41°29.00'N 1300 RCB to 200 mbsf (160 m into basement)   5.1 0.6 5.7
  170°38.00'E   Wireline logs (Triple combo and FMS)        
               
               
      Transit 200 nmi from Site HE-4B to Site HE-5C @ 10.5 kt 0.8      
               
               
HE-5C 38°09.50'N 1480 RCB to 220 mbsf (160 m into basement)   5.3 0.6 5.9
  170°50.00'E   Wireline logs (Triple combo and FMS)        
               
               
      Transit 201 nmi from Site HE-5C to Site HE-6A @ 10.5 kt 0.8      
               
               
HE-6A 34°58.94'N 1331 RCB to 240 mbsf (160 m into basement)   5.0 0.6 5.6
  172°08.98'E   Wireline logs (Triple combo and FMS)        
               
               
Yokohama 35°16.80'N   Transit 1640 nmi from Site HE-6A to Yokohama, Japan @ 10.0 kt 6.8      
  139°23.40'E            
      TOTAL: 16.5 31.7 3.8 35.5
               
        TOTAL DAYS:   52.0  

Site HE-1A Summary | Table of Contents