Annotated record of the detailed examination of Mn deposits from the SOUTHTOW cruise over the Manihiki Plateau, Pacific Ocean ...

• Main Author: Clague, David A
• Format: Dataset
• Language: English
• Published: PANGAEA 1976
• Subjects: DEPTH, sediment/rock; Identification; Position; Deposit type; Quantity of deposit; Size; Substrate type; Sediment type; Comment; Description; File name; Uniform resource locator/link to image; Dredge; Visual description; SOUTHTOW; Thomas Washington; Deep Sea Drilling Project DSDP; NOAA and MMS Marine Minerals Geochemical Database NOAA-MMS; Antarc*; Antarctic
• Online Access: https://dx.doi.org/10.1594/pangaea.870579; https://doi.pangaea.de/10.1594/PANGAEA.870579

Dredging in the Danger Island Troughs, which divide the High and Western parts of the Manihiki Plateau, recovered several fresh pebbles of olivine tholeiite and tholeiite, a single pebble of highly altered gabbroic cumulate, and several dozen pebbles of altered variolitic basalt. Troughs suggests that at one time the troughs were the site of active faulting. A tectonic model for the evolution of the plateau, consistent with a fracture zone origin for the Danger Island Troughs, requires the formation of the Manihiki Plateau at a triple junction of the Pacific, Farallon, and Antarctic plates. ... : 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1989 NOAA-NCEI compiled the NOAA-MMS Marine Minerals Geochemical Database from journal articles, technical reports and unpublished sources from other institutions.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. ...