1. Leg 209 Summary

ABSTRACT

INTRODUCTION

MANTLE UPWELLING, MELT TRANSPORT, AND IGNEOUS CRUSTAL ACCRETION

Focused Crustal Accretion at Slow-Spreading Ridges

Really Focused, Sort of Focused, Unfocused, Blurry: Terms for Mantle Upwelling

Testing Hypotheses for the Mechanism(s) of Focused Crustal Accretion

Structures in Peridotite and Gabbroic Intrusions

Interpretation of Chemical Variation in Mantle Peridotites

Interpretation of Melt Transport Features in Mantle Peridotites

MANTLE TEMPERATURE AND COMPOSITION

GABBROIC PLUTONS IN PERIDOTITE

HYDROTHERMAL ALTERATION OF PERIDOTITE

NATURE AND SOURCE OF MAGNETIZATION IN SERPENTINIZED PERIDOTITES

SITE SUMMARIES

REFERENCES

CHAPTER NOTES

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