A new box corer design for the investigation of manganese-nodule distribution in a sediment column |
| |
Authors: | Sunit Kumar Addy Maurice Ewing |
| |
Institution: | Earth and Planetary Sciences Division, Marine Biomedical Institute, The University of Texas Medical Branch, Galveston, Texas U.S.A. |
| |
Abstract: | A new, inexpensive and easy-to-handle box corer (47 × 47 × 114 cm3) is described. It is found to be extremely handy when operated from ships equipped with piston coring devices. The box corer uses the same piston core-head (~1000 kg) and the same trigger mechanism as used in piston coring. The whole operation is similar to that of piston coring. At three sites in the nodule-rich abyssal-hill province in the northwest Atlantic, the vertical distributions of the manganese nodules were obtained from the box cores. More than 75% of the nodules by weight is present in the top 10 cm of the sediment; 16–24% is present in the 10–20 cm interval and about 1% in the 20–30 cm interval. Very few nodules are found below 30 cm. |
| |
Keywords: | |
本文献已被 ScienceDirect 等数据库收录! |
|