Annotated record of the detailed examination of Mn deposits from DSDP Leg 77 (Holes 535, 536, 537, 538A) ...

• Main Authors: Buffler, Richard T, Schlager, Wolfgang
• Format: Dataset
• Language: English
• Published: PANGAEA 1984
• Subjects: Event label; Identification; Sample code/label; DEPTH, sediment/rock; Position; Deposit type; Quantity of deposit; Size; Substrate type; Sediment type; Comment; Description; File name; Uniform resource locator/link to image; Drilling/drill rig; Visual description; Leg77; Glomar Challenger; Deep Sea Drilling Project DSDP; NOAA and MMS Marine Minerals Geochemical Database NOAA-MMS; North Atlantic
• Online Access: https://dx.doi.org/10.1594/pangaea.875040; https://doi.pangaea.de/10.1594/PANGAEA.875040

The drilling of Leg 77 is part of an overall program by the JOIDES Passive Margin Panel to study the evolution of the western North Atlantic passive margin. The history of the central North Atlantic is probably the best known of all ocean basins, but the origin and history of the neighboring Gulf of Mexico are very much uncertain. Some geologists consider it the oldest ocean basin still in existence (Paleozoic), but others doubt the existence of "true" oceanic crust under the central Gulf. The nature and origin of the transitional crust and the overlying Mesozoic sedimentary sequences in the southeastern Gulf, therefore, was the main objective of Leg 77. ... : 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1989 NOAA-NCEI compiled the NOAA-MMS Marine Minerals Geochemical Database from journal articles, technical reports and unpublished sources from other institutions.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. ...