1996/05/01 by J. C. Alt, Christine Laverne, David A. Vanko +10 · 2 citations
Earth and Planetary Sciences · #Geochemistry and Elemental Analysis #Geological and Geochemical Analysis #Paleontology and Stratigraphy of Fossils
paper · pdf · doi:10.2973/odp.proc.sr.148.159.1996
openalex publication_date 1996/05/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/04
Mineralogical, chemical, and isotopic results from seven drilling legs that visited DSDP/ODP Hole 504B over 14 years are compiled here to present an integrated view of hydrothermal alteration of oceanic crust at Site 504. Hole 504B reaches to 2111 mbsf, through 274.5 m sediment, 571.5 m of volcanic rocks, a 209 m transition zone, and 1050 m into a sheeted dike complex. The volcanic section was altered through a series of processes involving interaction with seawater at low temperatures, with the effects of cold, oxidizing seawater decreasing downward. These processes and their effects on the volcanic section are generally similar to those in other oceanic upper crustal sections.