TY - JOUR T1 - Sedimentary carbon-isotope systematics on the Amazon shelf JF - Geo-Marine Letters Y1 - 1996 A1 - Sommerfield, C. K. A1 - Nittrouer, C. A. A1 - DeMaster, D. J. AB - Sedimentary carbon systematics on the Amazon continental shelf were investigated using C-14 and delta(13)C measurements of sedimentary organic materials. Mass balance calculations indicate that the C-14 content of modern shelf muds results from burial of old (similar to 5000 yr BP) terrestrial soil carbon and bomb-C-14-enriched marine carbon, implying that most of the bomb-labeled riverine particulate carbon is not buried on the shelf. The C-14 signature of Amazon shelf deposits records the effects of both biogeochemical and sedimentary processes active in this dynamic environment. VL - 16 IS - 1 N1 - Ty588Times Cited:12Cited References Count:33 JO - Sedimentary carbon-isotope systematics on the Amazon shelf ER -