Can I read The cycling and accumulation of biogenic silica and organic carbon in Antarctic deep-sea and continental margin environments on EtoBox?

The cycling and accumulation of biogenic silica and organic carbon in Antarctic deep-sea and continental margin environments by D.J. DeMaster; T.M. Nelson; S.L. Harden; C.A. Nittrouer is a Earth and Planetary Sciences article available to read on EtoBox.

What is The cycling and accumulation of biogenic silica and organic carbon in Antarctic deep-sea and continental margin environments about?

Rates of biogenic silica and organic carbon accumulation are reported for Antarctic deep-sea and continental margin deposits. Naturally occurring radionuclides e 26 Ra, 231 Pa, and 230Th) were used to establish rates of sediment accumulation in the rapidly accumulating siliceous deposits beneath the Antarctic Polar Front. The rates were as high as 20-180 em ka-I, and when coupled with biogenic silica and organic carbon measurements, yield accumulation rates as high as 35 rng em-2 year-I for silica and 0.3 mg ern"? yearr ' for organic carbon. Si0 2/organic C weight ratios in Polar Front sedi- ments are typically about 100, although values as high as 300 were measured. Considering that the Si0 2/organic C ratio in Polar Front plankton ranges from 0.5 to 2, the high ratios observed in Polar Front sediments indicate that during settling and burial an enrichment of 50-600-fold occurs in biogenic silica relative to organic carbon. Rates of sediment accumulation were determined for the continental margin deposits of the Bransfield Strait and the Ross Sea using 210Pb and 14C chronologies. Accumulation rates ranged from 0.02 to 0.5 em year-I. Based on these data and measurements of biogenic

Who reads The cycling and accumulation of biogenic silica and organic carbon in Antarctic deep-sea and continental margin environments?

Author

D.J. DeMaster; T.M. Nelson; S.L. Harden; C.A. Nittrouer

Publisher

Elsevier Science; Elsevier ; Elsevier BV (ISSN 0304-4203)

Published

1991

Language

EN

Field

Earth and Planetary Sciences (Physical Sciences)