Oregon State University

April Abbott- 2015 Project

April Abbott- 2015 Project
April Abbott- 2015 Project

April Abbott- Ph.D. Candidate

In the W. M. Keck Collaboratory for Plasma Spectrometry, April is interested in the rare earth elements (REEs) in marine sediments and sedimentary pore fluids. The isotopic distribution of Neodymium (a REE) are used as a tracer of water mass circulation. April’s project focuses on the source of Nd to the ocean. Recently, isotopic models have shown that the source of ~95% of Nd in the ocean is largely unknown. Along with advisers Brian Haley and Jim McManus, April has shown that the diffusive flux of Nd from the sedimentary pore fluids is enough to account for the missing source of Nd to the ocean. Her samples were collected along the Oregon margin and analyzed on the Thermo-X Series quadrupole for REE concentrations. The next part of the project was to measure the isotopic composition of the pore fluids. In order to make these measurements, April needed almost 1 L of pore fluids. Currently, April is investigating the driving mechanisms determining the size and isotopic composition of the pore fluid Nd source. April plans to present the most recent findings from this project at the AGU Fall Meeting in December.