OCEAN DRILLING PROGRAM
LEG 158 - INITIAL REPORTS

Table of Contents

Acknowledgments, p. 1

SECTION 1: INTRODUCTION

Chapter 1: Introduction and principal results, p. 5-14.
Shipboard Scientific Party

Chapter 2: Detailed structure and morphology of the TAG active hydrothermal mound and its geotectonic environment, p. 15-21.
M.C. Kleinrock, S.E. Humphris, and the Deep-TAG Team

Chapter 3: Pre-drilling observations of conductive heat flow at the TAG active mound using ALVIN, p. 23-29.
K. Becker and R.P. Von Herzen

Chapter 4: Advances in the motor-driven core barrel (MDCB), p. 31-35.
S.P. McGrath and E. Miyazaki

Chapter 5: Explanatory notes, p. 37-53.
Shipboard Scientific Party

Chapter 6: Operations, p. 55-62.
Shipboard Scientific Party

SECTION 2: SITE CHAPTERS

Chapter 7: TAG-1 Area, p. 65-140.
Shipboard Scientific Party

Site summary, p. 65
Principal results, p. 66
Stratigraphy, p. 67
Sulfide petrology and geochemistry, p. 68
Hydrothermal alteration, p. 104
Physical properties, p. 114
Paleomagnetism, p. 120
Fluid geochemistry, p. 123

Site summary, p. 141
Principal results, p. 142
Stratigraphy, p. 142
Sulfide petrology and geochemistry, p. 144
Hydrothermal alteration, p. 160
Igneous petrology and geochemistry, p. 163
Physical properties, p. 163
Paleomagnetism, p. 166
Fluid geochemistry, p. 168

Site summary, p. 171
Principal results, p. 171
Stratigraphy, p. 171
Sulfide petrology and geochemistry, p. 171
Physical properties, p. 172
Fluid geochemistry, p. 173

Site summary, p. 175
Principal results, p. 176
Stratigraphy, p. 177
Sulfide petrology and geochemistry, p. 178
Hydrothermal alteration, p. 193
Igneous petrology and geochemistry, p. 199
Physical properties, p. 200
Paleomagnetism, p. 201

Site summary, p. 209
Principal results, p. 209
Stratigraphy, p. 210
Sulfide petrology and geochemistry, p. 212
Hydrothermal alteration, p. 219
Physical properties, p. 220
Paleomagnetism, p. 221

Core description forms and core photographs for:
Site 957, p. 227-338.

Appendix: Thin-Sections Summary, p. 341-343.
Shipboard Scientific Party

Thin-section descriptions for:
Site 957, p. 345-372.

JOIDES Advisory Groups, p. 375-379.
Sample and Data Distribution Policy, p. 381-384.

Chapter 7:
Table 2. Listing of visual core descriptions for core from Hole 957C from the Leg 158 Sulfide Log.
Table 6. Listing of visual core descriptions for core from Hole 957E from the Leg 158 Sulfide Log.
Table 7. Listing of visual core descriptions for core from Holes 957F and 957G from the Leg 158 Sulfide Log.

Chapter 8:
Table 2. Listing of visual core descriptions for core from Holes 957A, 957B, 957H, and 957N from the Leg 158 Sulfide Log.

Chapter 9:
Table 1. Listing of visual core descriptions for core from Hole 957Q from the Leg 158 Sulfide Log.

Chapter 10:
Table 2. Listing of visual core descriptions for core from Holes 957I, 957J, 957K, and 957M from the Leg 158 Sulfide Log.

Chapter 11:
Table 2. Listing of visual core descriptions for core from Holes 957O and 957P from the Leg 158 Sulfide Log.

The CD-ROM in the back of this volume contains shipboard gamma-ray attenuation porosity evaluator (GRAPE), index properties, magnetic susceptibility, natural gamma-ray, and P-wave data of cores collected on board JOIDES Resolution during Leg 158. This CD also contains sulfide core logs, basement core logs, and thin section summary descriptions in spreadsheet format.

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