Annotated record of the detailed examination of Mn deposits from DSDP Leg 43 (Holes 384, 385, 386 and 387) ...
Leg 43 was planned to examine a wide variety of geological problems at numerous sites in the deep western North Atlantic basin. A variety of objectives were to be addressed on Leg 43,among these: 1) to investigate the sedimentary development of the North American basin, 2) to recover sediments conta...
| Main Authors: | , |
|---|---|
| Format: | Dataset |
| Language: | English |
| Published: |
PANGAEA
1979
|
| Subjects: | |
| Online Access: | https://dx.doi.org/10.1594/pangaea.872102 https://doi.pangaea.de/10.1594/PANGAEA.872102 |
| Summary: | Leg 43 was planned to examine a wide variety of geological problems at numerous sites in the deep western North Atlantic basin. A variety of objectives were to be addressed on Leg 43,among these: 1) to investigate the sedimentary development of the North American basin, 2) to recover sediments containing late Mesozoic and Cenozoic fossils for biostratigraphic, paleobiogeographic, and paleoceanographic studies 3) to recover samples of basaltic basement from the smooth crest of the basement ridge associated with the northern part of the New England seamounts, 4) To examine the age and nature of volcanism on Bermuda and along the New England seamount chain, in order to test ideas on volcanic* origin such as the "hotspot" hypothesis, and to examine volcaniclastic lithofacies and assess the role of volcanic sources for certain North Atlantic sediments. ... : In Site 43-384, the upper part of the first core was not recovered so that it was not possible to clarify the presence of manganese nodules at the surface of the sediment. Many of those have been found in top position for several cores but are suspected to have flowed-in. Thus their "Position" data field has been left blank.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1989 NOAA-NCEI compiled the NOAA-MMS Marine Minerals Geochemical Database from journal articles, technical reports and unpublished sources from other institutions.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. ... |
|---|