Annotated record of the detailed examination of Mn deposits from DSDP Leg 76 (Hole 534A) ...

The continental edge of eastern North America is the passive margin with the oldest geological history available in the modern oceans. Rifting and seafloor spreading between the North American and African continents began in the late Triassic to Early Jurassic. A possible spreading-center jump and r...

Full description

Bibliographic Details
Main Authors: Shipboard Scientific Party, Sheridan, Robert E
Format: Dataset
Language:English
Published: PANGAEA 1983
Subjects:
Identification
Sample code/label
DEPTH, sediment/rock
Position
Deposit type
Quantity of deposit
Size
Sediment type
Comment
Description
File name
Uniform resource locator/link to image
Drilling/drill rig
Visual description
Leg76
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.874961
https://doi.pangaea.de/10.1594/PANGAEA.874961
Description
Summary:The continental edge of eastern North America is the passive margin with the oldest geological history available in the modern oceans. Rifting and seafloor spreading between the North American and African continents began in the late Triassic to Early Jurassic. A possible spreading-center jump and reorganization in spreading at the time of the Blake Spur Magnetic Anomaly (?Bathonian ) left some of the oldest crust on the western margin of the North Atlantic. Penetration and sampling of such old ocean crust and the immediately overlying pelagic sedimentary cover, consisting of Middle Jurassic and younger strata, has long been a key objective in oceanographic research. This objective was accomplished at Site 534. ... : 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1989 NOAA-NCEI compiled the NOAA-MMS Marine Minerals Geochemical Database from journal articles, technical reports and unpublished sources from other institutions.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. ...

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