1. Leg 209 Summary: Processes in a 20-km-Thick Conductive Boundary Layer beneath the Mid-Atlantic Ridge, 14°–16°N

ABSTRACT

INTRODUCTION

IGNEOUS PROCESSES

STRUCTURE AND TECTONICS

CONTRIBUTIONS TO GLOBAL GEOCHEMISTRY

Osmium Isotope Geochemistry

Trace Element Geochemistry and the Pb Paradox

Zircon Provenance (Ridge vs. Arc Zircons)

GEOBIOLOGY

AEROBIOLOGY

ACKNOWLEDGMENTS

REFERENCES

CHAPTER NOTES

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