Citation:

dsdp.proc.40.1978

Name: Annotated record of the detailed examination of Mn deposits from DSDP Leg 40 (Hole 361)
Published: 1978
License: https://creativecommons.org/licenses/by/3.0/

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Abstract:

From a structural and morphological point of view, the continental margin of southwestern Africa is a middle-aged "pull-apart" or "passive-type" margin which was initially created during the breakup of the supercontinent of Gondwanaland in the Mesozoic. The most important objective of the Leg 40 expedition was the attainment of strata laid down when the newly formed ocean was very young and only a few hundred kilometers wide. Site 361 was drilled at the fall of continental platform into the Cape Basin, to a sub-sea floor depth of 1314 meters and yielded sediments that range in age from upper Eocene to lower Aptian and possibly slightly older.

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: -35.066200 * Longitude: 15.448500

Date/Time Start: 1975-01-05T00:00:00 * Date/Time End: 1975-01-05T00:00:00

Minimum DEPTH, sediment/rock: 299.65 m * Maximum DEPTH, sediment/rock: 858.92 m

Event(s):

40-361 * Latitude: -35.066200 * Longitude: 15.448500 * Date/Time: 1975-01-05T00:00:00 * Elevation: -4549.0 m * Penetration: 1314 m * Recovery: 230.2 m * Location: South Atlantic Ocean * Campaign: * Basis: Glomar Challenger * Method/Device: Drilling/drill rig (DRILL) * Comment: 49 cores; 465.5 m cored; 0 m drilled; 49.5 % 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1989 NOAA-NCEI compiled the NOAA-MMS Marine Minerals Geochemical Database from journal articles, technical reports and unpublished sources from other institutions.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:

19 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
40-361-12-2,65-72-1	40-361-12-2,65-72	299.65	Buried	Mn nodule	3	Up to 2.0 cm	Mud	Zeolitic mudstone, brownish gray (Upper cretaceous)	Manganes nodule, 2.0 cm diameter, within pelagic clay (Site 361, Core 12, Cored Interval: 297.5-307.0 m, page 103)	Fig13_DSDP_40-361.jpg	Fig13_DSDP_40-361.jpg
40-361-25-1,25-87-1	40-361-25-1,25-87	858.92	In sediment	Mn micronodule	Several		Clay	Cretaceous-Tertiary boundary marked by the deposition of brick-red pelagic clay	Contains manganese oxide micronodules and abundant fish debris. (Site 361, Core 25, Cored Interval: 858.0-867.5 m, page 109)