(Table 1, Pages 189-191) Physical characteristics of manganese nodules collected in the Atlantic Ocean during cruise RC15 (R/V Robert D. Conrad) in the vicinity of the Nares Abyssal Plain ...

• Main Authors: Ewing, Maurice, Shipley, Thomas H, Connary, Stephen D
• Format: Dataset
• Language: English
• Published: PANGAEA 1973
• Subjects: Event label; Latitude of event; Longitude of event; Comment of event; Elevation of event; Method/Device of event; Identification; DEPTH, sediment/rock; Position; Deposit type; Quantity of deposit; Nodules; Substrate type; Shape; Description; Uniform resource locator/link to image; Piston corer; Visual description; RC15; Robert Conrad; NOAA and MMS Marine Minerals Geochemical Database NOAA-MMS; North Atlantic
• Online Access: https://dx.doi.org/10.1594/pangaea.860236; https://doi.pangaea.de/10.1594/PANGAEA.860236

Intensive surveys were made in an abyssal hill province in the North Atlantic at the northeast edge of the Nares Abyssal Plain, where the general conditions favorable for the formation of manganese nodules prevail, i.e., deep water (2600-3300 fm) and low rate of sediment accumulation. Typically, manganese nodules were observed to be abundant in one spot, and just a short distance away, under conditions which seemed to be the same, the ocean floor was completely devoid of nodules. Efforts to develop effective surveying techniques were very successful, particularly use of Kennecott grabbers and a new PINGERPROBE technique in conjunction with satellite navigation. ... : From 1983 until 1989 NOAA-NCEI compiled the NOAA-MMS Marine Minerals Geochemical Database from journal articles, technical reports and unpublished sources from other institutions. At the time it was the most extended data compilation on ferromanganese deposits world wide. Initially published in a proprietary format incompatible with present day standards it was jointly decided by AWI and NOAA to transcribe this legacy data into PANGAEA. This transfer is augmented by a careful checking of the original sources when available and the encoding of ancillary information (sample description, method of analysis...) not present in the NOAA-MMS database. ...