Pore-water chemistry of carbonate-rich sediments, Lord Howe Rise, southwest Pacific Ocean.

Abstract:

At all sites on Leg 90 on the carbonate-rich Lord Howe Rise, Ca2+ concentrations increase and Mg2+ concentrations decrease with increasing sub-bottom depth. The value of ddCa2+/dMg2+ averages -0.45 mol/mol at these sites, an unusually small negative value in comparison with sites on basaltic crust. This supports the argument that the crust of the Lord Howe Rise is siliceous. Carbonate recrystallization is indicated by large increases in Sr2+ concentrations with depth at all sites. The greater the degree of microbial sulfate reduction, the higher is the pore water Sr2+ concentration. -from Author

Año de publicación:

1986

Keywords:

Fuente:

scopus