Technical Note 20/4

LEG 175 PROSPECTUS

Table 1. Proposed Site Information and Drilling Strategy

SITE: NAB-1		PRIORITY: 			POSITION: 5°3.6'S, 11°6.6'E
WATER DEPTH: 1397 m	SEDIMENT THICKNESS: >500 m	TOTAL PENETRATION: 400 m
SEISMIC COVERAGE: GeoB 2301

Objectives: Paleoproductivity/environmental record of fan margin deposits

Drilling Program: APC/XCB

Logging and Downhole Operations: Quad combo, GLT

Nature of Rock Anticipated: Hemipelagic foram and diatom bearing muds

SITE: NAB-4		PRIORITY: 			POSITION: 4°46.8'S, 10°4.8'E	
WATER DEPTH: 3001 m	SEDIMENT THICKNESS: 600 m	TOTAL PENETRATION: 600 m 
SEISMIC COVERAGE: GeoB 93-002

Objectives: Paleoproductivity/environmental record of fan margin deposits;
	    most distal location to Congo Canyon

Drilling Program: APC/XCB

Logging and Downhole Operations: Quad combo, GLT

Nature of Rock Anticipated: Hemipelagic foram and diatom bearing muds

SITE: MAB-1		PRIORITY: 			POSITION: 11°54'S, 13°21.6'E	
WATER DEPTH: 550 m	SEDIMENT THICKNESS: >500 m	TOTAL PENETRATION: 400 m 
SEISMIC COVERAGE: GeoB 93-015, GeoB 93-018

Objectives: Continental margin sedimentation; paleoproductivity

Drilling Program: APC/XCB

Logging and Downhole Operations: Quad combo, GLT

Nature of Rock Anticipated: Hemipelagic foram and diatom bearing muds

SITE: MAB-3		PRIORITY: 			POSITION: 11°54'S, 13°7.2'E	
WATER DEPTH: 1178 m	SEDIMENT THICKNESS: >500 m	TOTAL PENETRATION: 400 m 
SEISMIC COVERAGE: GeoB 93-015, GeoB 93-022

Objectives: Continental margin sedimentation; paleoproductivity

Drilling Program: APC/XCB

Logging and Downhole Operations: Quad combo, GLT

Nature of Rock Anticipated: Hemipelagic foram and diatom bearing muds

SITE: MAB-5A		PRIORITY:			POSITION: 11°58.2'S, 12°53.4'E	
WATER DEPTH: 1159 m	SEDIMENT THICKNESS: >1000 m	TOTAL PENETRATION: 600 m 
SEISMIC COVERAGE: GeoB 93-015, GeoB 93-028

Objectives: Continental margin sedimentation; paleoproductivity

Drilling Program: APC/XCB

Logging and Downhole Operations: Quad combo, GLT

Nature of Rock Anticipated: Hemipelagic foram and diatom bearing muds

SITE: SAB-2		PRIORITY:			POSITION: 11°33.6'S, 10°49.2'E	
WATER DEPTH: 2770 m	SEDIMENT THICKNESS: >1000 m	TOTAL PENETRATION: 600 m 
SEISMIC COVERAGE: GeoB 93-030, GeoB 93-033

Objectives: Paleoproductivity - upwelling history; relationship to current systems

Drilling Program: APC/XCB

Logging and Downhole Operations: Quad combo, GLT, GHMT, FMS

Nature of Rock Anticipated: Hemipelagic foram and diatom bearing muds

SITE: WR-1		PRIORITY:			POSITION: 11°33.6'S, 10°49.2'E	
WATER DEPTH: 750 m	SEDIMENT THICKNESS: 1200m	TOTAL PENETRATION: 600 m 
SEISMIC COVERAGE: 

Objectives: History of Benguela Current

Drilling Program: APC/XCB

Logging and Downhole Operations: Quad combo, GLT

Nature of Rock Anticipated: Nannofossil ooze and chalk

SITE: NCB-2		PRIORITY:			POSITION: 25°30'S, 13°4.8'E	
WATER DEPTH: 1850 m	SEDIMENT THICKNESS: 2000 m	TOTAL PENETRATION: 600 m 
SEISMIC COVERAGE: GeoB 93-044, MCS line AM-1

Objectives: History of Benguela Current

Drilling Program: APC/XCB

Logging and Downhole Operations: Quad combo, GLT

Nature of Rock Anticipated: Nannofossil ooze and chalk

SITE: SCB-1		PRIORITY:			POSITION: 31°24'S, 15°16.8'E	
WATER DEPTH: 1350 m	SEDIMENT THICKNESS: 3800 m	TOTAL PENETRATION: 600 m 
SEISMIC COVERAGE: MCS line AM-54

Objectives: History of Benguela Current

Drilling Program: APC/XCB

Logging and Downhole Operations: Quad combo, GLT, GHMT, FMS

Nature of Rock Anticipated: Nannofossil ooze and chalk