Shipboard ferromanganese nodules and crusts chemical analysis of samples from cruise L583HW (R/V S.P. Lee) using a Portaspec X-ray fluorescence instruments

The cooperative cruise of the R/V S.P. Lee in 1983 provided an excellent opportunity for a wide-range interlaboratory study on samples of crusts ground and sieved aboard the vessel. Analytical data on splits of approximately 56 samples were performed by the U.S. Geological Survey laboratories in Reston Virginia and Woods Hole Massachusetts, (see Chapter V), the Bureau of Mines laboratory in Avondale, Maryland, and the laboratory of the German Geological Survey in Hannover, Federal Republic of Germany. In addition, shipboard analyses were performed on a small, portable X-ray fluorescence unit (Portaspec, made by the Hankinson Corp.) for six fixed elements (Mn, Fe, Ni, Co, Cu, plus semi-quantitative estimations on Zn and Pb).