Citation:

dsdp.proc.6.108.1971

Name: Annotated record of the detailed examination of Mn deposits from DSDP Site 50, Leg 6 (Cores 6-50-2, 6-50A-1, 6-50A-3 )
Published: 1971
License: https://creativecommons.org/licenses/by/3.0/

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Published: 1971 (exact date unknown) • DOI registered: 2016-12-04

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Abstract:

Site 49 had been selected to investigate the basal part of the sedimentary sequence as revealed by the acoustic profiles, and to sample the underlying opaque material. However, the cherty nature of the sediments prevented penetration of the section at Site 49, and the only recourse appeared to be to move to a spot of even thinner sedimentary cover. Such a place existed, just downslope from Site 49, where Horizon B' comes very close to the surface, this is where Site 50 was selected.

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: 32.403300 * Longitude: 156.571700

Date/Time Start: 1969-07-03T00:00:00 * Date/Time End: 1969-07-03T00:00:00

Minimum DEPTH, sediment/rock: 4.9 m * Maximum DEPTH, sediment/rock: 52.1 m

Event(s):

6-50 * Latitude: 32.403300 * Longitude: 156.571700 * Date/Time: 1969-07-03T00:00:00 * Elevation: -4487.0 m * Penetration: 44.8 m * Recovery: 13 m * Location: North Pacific/CONT RISE * Campaign: * Basis: Glomar Challenger * Method/Device: Drilling/drill rig (DRILL) * Comment: 2 cores; 6.7 m cored; 0 m drilled; 194 % recovery

6-50A * Latitude: 32.403300 * Longitude: 156.571700 * Date/Time: 1969-07-03T00:00:00 * Elevation: -4487.0 m * Penetration: 36 m * Recovery: 25.7 m * Location: North Pacific/CONT RISE * Campaign: * Basis: Glomar Challenger * Method/Device: Drilling/drill rig (DRILL) * Comment: 4 cores; 30.8 m cored; 0 m drilled; 83.4 % 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1989 NOAA-NCEI compiled the NOAA-MMS Marine Minerals Geochemical Database from journal articles, technical reports and unpublished sources from other institutions.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	Event label	Event
2	Identification	ID
3	Sample code/label	Sample label
4	DEPTH, sediment/rock	Depth sed	m		Geocode
5	Position	Position		Visual description
6	Deposit type	Deposit type
7	Quantity of deposit	Quantity
8	Size	Size
9	Substrate type	Substrate
10	Sediment type	Sediment
11	Comment	Comment
12	Description	Description

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 Event	2 ID	3 Sample label	4 Depth sed [m]	5 Position	6 Deposit type	7 Quantity	8 Size	9 Substrate	10 Sediment	11 Comment	12 Description
6-50	6-50-2-6,100-1	6-50-2-6,100	52.1	Buried	Mn coating	Several		Fragment; chert	Ooze	Nanno chalk ooze (Early cretaceous)	Yellow-brown, red, brown, white, mottled red and dark brown chert fragments, both angular and rounded, weathered and coated with manganese. ( Figure 7. Summary of lithology in Hole 50.0 Core 2, page 204 )
6-50A	6-50A-1-1,0-1	6-50A-1-1,0	4.9	Surface	Mn nodule	Several	5.0 cm		Ooze	Yellowish-brown to brown, slightly mottled diatom-radiolarian ooze (Pleistocene)	A layer, 5 centimeters thick, of manganese-iron oxide nodules. ( Figure 10. Summary of lithology in Hole 50.1 Core 1, page 208 )
6-50A	6-50A-3-6,90-1	6-50A-3-6,90	31.6	Buried	Mn coating	Many	Small	Fragment; ash	Mud	Brown, silty zeolitic mud (Tertiary)	A zone about 3 centimeters thick containing numerous small, flattish white pebbles of lithified but friable white volcanic ash that are coated with manganese iron oxide. ( Figure 16. Summary of lithology in Hole 50.1 Core 3 page 216 )