Citation:

PANGAEA.874961

Name: Annotated record of the detailed examination of Mn deposits from DSDP Leg 76 (Hole 534A)
Published: 1983
License: https://creativecommons.org/licenses/by/3.0/

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Abstract:

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.

Related to:

Shipboard Scientific Party (1983): Site 534: Blake-Bahama Basin. In: Sheridan, R.E.; Gradstein, F.M.; et al., Initial Reports of the Deep Sea Drilling Project, U.S. Government Printing Office, LXXVI, 141-340, https://doi.org/10.2973/dsdp.proc.76.104.1983

Source:

Grant, John Bruce; Moore, Carla J; Alameddin, George; Chen, Kuiying; Barton, Mark (1992): The NOAA and MMS Marine Minerals Geochemical Database. National Geophysical Data Center, NOAA, https://doi.org/10.7289/V52Z13FT

Further details:

Warnken, Robin R; Virden, William T; Moore, Carla J (1992): The NOAA and MMS Marine Minerals Bibliography. National Geophysical Data Center, NOAA, https://doi.org/10.7289/V53X84KN

Project(s):

Deep Sea Drilling Project (DSDP)

NOAA and MMS Marine Minerals Geochemical Database (NOAA-MMS)

Coverage:

Latitude: 28.343300 * Longitude: -75.381700

Date/Time Start: 1980-10-21T00:00:00 * Date/Time End: 1980-10-21T00:00:00

Minimum DEPTH, sediment/rock: 709.40 m * Maximum DEPTH, sediment/rock: 751.84 m

Event(s):

76-534A * Latitude: 28.343300 * Longitude: -75.381700 * Date/Time: 1980-10-21T00:00:00 * Elevation: -4971.0 m * Penetration: 1666.5 m * Recovery: 612.4 m * Location: North Atlantic/BASIN * Campaign: * Basis: Glomar Challenger * Method/Device: Drilling/drill rig (DRILL) * Comment: 127 cores; 1113.1 m cored; 31.5 m drilled; 55 % recovery

Comment:

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1989 NOAA-NCEI compiled the NOAA-MMS Marine Minerals Geochemical Database from journal articles, technical reports and unpublished sources from other institutions.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.

Parameter(s):

#	Name	Short Name	Unit	Method/Device	Comment
1	Identification	ID
2	Sample code/label	Sample label
3	DEPTH, sediment/rock	Depth sed	m		Geocode
4	Position	Position		Visual description
5	Deposit type	Deposit type
6	Quantity of deposit	Quantity
7	Size	Size
8	Sediment type	Sediment
9	Comment	Comment
10	Description	Description
11	File name	File name
12	Uniform resource locator/link to image	URL image

License:

Creative Commons Attribution 3.0 Unported (CC-BY-3.0)

Size:

28 data points

Data

Download dataset as tab-delimited text — use the following character encoding:

1 ID	2 Sample label	3 Depth sed [m]	4 Position	5 Deposit type	6 Quantity	7 Size	8 Sediment	9 Comment	10 Description	11 File name	12 URL image
75-534A-20-3,99-1	75-534A-20-3,99	709.40	In sediment	Mn micronodule	Several	Up to 0.5 cm	Claystone	Variecolored claystone (Middle Eocene)	Manganese micronodules up to 0.5 cm in diameter (Site 534A, Core 20, Cored Interval: 705.5-714.5 m, page 249)
75-534A-24-2,26-28-1	75-534A-24-2,26-28	743.27	In sediment	Mn micronodule	Several	Up to 0.5 cm	Claystone	Variegated claystone matrix, reddish brown and greenish gray (Upper Maestrichtian)	Manganese micronodules up to 0.5 cm in diameter. Pure compact MnO2 without terrigenous material. (Site 534A, Core 24, Cored Interval: 741.5-750.5 m, page 250)	Fig6_534.jpg	Fig6_534.jpg
76-534A-25-11,134-1	76-534A-25-11,134	751.84	In sediment	Mn micronodule	Few		Claystone	Reddish brown to pale olive zeolitic claystone (Upper Maestrichtian)	1% Mn micronodules (Site 534A, Core 25, Cored Interval: 750.5-759.5 m, page 250)