Publication Date:
2023-08-28
Description:
Erosion of sediment at two sites within the siliceous-clay province of the northeast equatorial Pacific is investigated by examining radionuclide, radiolarian and percent smectite profiles of three cores. A numerical model of the sediment is presented that examines the effect of various particle rain rates, erosion rates and biological mixing parameters on these profiles. 230Th, because of its longer half-life, is a more sensitive tracer of erosion than231Pa. Because the input of these radionuclides into the sediment is not well defined however, conservative tracers, such as the percent smectite of the clay fraction and fossil radiolarians are used to constrain the rate of sediment recycling. Dissolution of radiolarians though can greatly affect the interpretation of the observed biostratigraphy.
Keywords:
BC; Box corer; Deposit type; Depth, bottom/max; DEPTH, sediment/rock; Depth, top/min; DOMES Site B, Pacific Ocean; Event label; Identification; Inductively coupled plasma - mass spectrometry (ICP-MS); K7905; K7905-047BC; K7905-106BC; Knorr; Lead-210 excess; Lead-210 excess, standard deviation; MANOP; MANOP Site S, Pacific Ocean; NOAA and MMS Marine Minerals Geochemical Database; NOAA-MMS; Oceanographer; Protactinium-231; Protactinium-231, standard deviation; RP-8-OC-75; RP8OC7503; RP8OC75-55-56; Thorium-230; Thorium-230, standard deviation; Uranium-234; Uranium-234, standard deviation; Uranium-238; Uranium-238, standard deviation
Type:
Dataset
Format:
text/tab-separated-values, 371 data points
