Site Summaries (continued) | Table of Contents

SITE SUMMARIES

Site: 1040R

Priority: 2
Position: 9°39.7'N, 86°10.7'W
Water Depth: 4177 mbsf
Sediment Thickness: 670 m
Target Drilling Depth: 435 mbsf
Approved Maximum Penetration: 920 mbsf; approved to drill without coring to 620 mbsf
Seismic Coverage: Position of site at shotpoint 2736 on seismic line CR-20 (K. McIntosh, pers. comm., UTIG, Austin, TX, USA, 2001) and at shotpoint 3125 on seismic line BGR-99-44 (C. Ranero, pers. comm., GEOMAR, Kiel, Germany and C. Reichert, pers. comm., BGR, Hannover, Germany, 2001).
See the track line, seismic CR-20, and seismic BGR-99-44



Objectives: The objectives of Site 1040R are to:

1. Investigate the décollement.

2. Investigate fluid flow within the décollement and underthrust sediments.

3.Install modified CORKs to monitor pressure and temperature and to sample fluids within the décollement and underthrust sediments.



Drilling Program: Three adjacent holes will be drilled at Site 1040R. The first will be cored with the RCB from 180 to 410 mbsf and then a modified CORK will be installed for monitoring fluid flow, pressure, and temperature in the uppermost underthrust sediments (~425 mbsf). The next two holes will be drilled (likely without coring) and a modified CORK will be installed in each hole for monitoring fluid flow, pressure, and temperature in the décollement.



Logging and Downhole: Formation temperature measurements (~5 DVTP); no downhole logging is planned at this site.


Nature of Rock Anticipated: Deformed claystones and hemipelagics.

Site Summaries (continued) | Table of Contents