10. FROM OXIDIZING TO REDUCING ALTERATION: MINERALOGICAL VARIATIONS IN PILLOW BASALTS FROM THE EAST FLANK, JUAN DE FUCA RIDGE

ABSTRACT

INTRODUCTION

METHODS

PRIMARY PETROGRAPHIC AND MINERALOGIC FEATURES OF PILLOW BASALTS

ALTERATION INTENSITY

SECONDARY MINERALS

Clay Minerals

Fe-oxyhydroxides and Mixtures of Fe-oxyhydroxides and Clay Minerals

Carbonates

Sulfides

Talc, Quartz, and Zeolites

ALTERATION STYLE

FROM OXIDIZING TO REDUCING ALTERATION

SUMMARY AND CONCLUSIONS

ACKNOWLEDGMENTS

REFERENCES

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