Physics
Scientific paper
Jan 1990
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990gecoa..54..237c&link_type=abstract
Geochimica et Cosmochimica Acta, vol. 54, Issue 1, pp.237-245
Physics
5
Scientific paper
Short-term sediment accumulation rates were determined using activity distributions of 7 Be in the surficial sediments of a station (A-1) in Cape Lookout Bight, North Carolina (USA). This semienclosed coastal marine basin is characterized by high annual accumulation rates. Protected from high energy conditions by its geomorphology, the relatively quiescent waters of the bight's interior cause it to act as an efficient settling trap for fine-grained sediment. Lack of bioturbation in the surface sediments allowed for variations in depth-integrated activity profiles of 7 Be to be interpreted as short-term accumulation events. Beryllium-7 inventories exhibited seasonal cyclicity with inaxima occurring during spring (February through June). The inventory of 7 Be ranged from 5.8 to 32.6 dpm cin -2 and was always well in excess of the atmospherically supported value . Accumulation rates calculated froin 7 Be activity profiles indicate that the delivery of particulate matter to the sediments of Cape Lookout Bight is not constant throughout an annual cycle. The highest monthly accumulation rates appeared to be associated with north/northeast storm activity. Inputs were generally highest during late winter/early spring when storm frequency is greatest. Short-term accumulation rates derived from this study agree with 210 Pb rates calculated for a ten-year period of accumulation. The annual sediment accumulation rates for each of the two years over which the study was conducted was found to be 4.8 ±0.8 g cm -2 y -1 and 3.7 ± 1.2g cm -2 y -1 .
Benninger Larry K.
Canuel Elizabeth A.
Martens Christopher S.
No associations
LandOfFree
Seasonal variations in 7 Be activity in the sediments of Cape Lookout Bight, North Carolina does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Seasonal variations in 7 Be activity in the sediments of Cape Lookout Bight, North Carolina, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Seasonal variations in 7 Be activity in the sediments of Cape Lookout Bight, North Carolina will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1562804