Publication Date:
2023-08-28
Description:
We report here that a manganese nodule from the Central Pacific manganese nodule province has been dated by fossil diatoms found in mud scraped from near the nodule's centre. The nodule was taken at DOMES Site B from Core B55-56 at 11°50.3'N and 137°28.2'W in a water depth of 4,892 m. It was resting on the sediment surface, with about 1.5 cm of the nodule bottom (of a total nodule height of 4.2 cm) buried in the mud. The top surface of the nodule was covered with a smooth manganese coating, but the bottom had a very rough, crusty texture. It was found that recent mud had leaked in through cracks in the nodule bottom, but that there were no pre-Pleistocene diatoms in this material. The date obtained was compared with the growth rate determined by the 230Th excess method and found to be in reasonable agreement. This study adds to the work of Harada1,2 on the biostratigraphy (mainly coccoliths) of manganese nodules.
Keywords:
Alpha counting; BC; Box corer; Deposit type; DEPTH, sediment/rock; Description; DISTANCE; DOMES Site B, Pacific Ocean; Identification; NOAA and MMS Marine Minerals Geochemical Database; NOAA-MMS; Oceanographer; RP-8-OC-75; RP8OC7503; RP8OC75-55-56; Thorium-230 excess; Thorium-230 excess, standard deviation
Type:
Dataset
Format:
text/tab-separated-values, 33 data points
