Particle Fluxes,Mineralogy,and Chemistry of Sedimentary Material in the Broken Spur Hydrothermal Field,Mid-Atlantic Ridge,29degC N

摘要

The particle flux near the Saracen's Head "black smoker"Broken Spur hydrothermal field,was determined usinga sediment trap.We studied the mineralogical and chemical composition of the material.The ore minerals are Fe sulfides 9pyrite and pyrrhotite),and Zn and Cu sulfides,which occur in equally low amounts.Ca minerals (anhydrite,gypsum,and calcite) are the major gangue minerals.The sediment traps within and below the hydrothermal plume collected mainly biogenic material with an admixture of hydrothermal components.This material is enriched in Fe,Zn,Ca,Si,Ba,and P relative to the background concentrations.