Citation:

dsdp.proc.8.105.1971

Name: Annotated record of the detailed examination of Mn deposits from DSDP Site 70, Leg 8 (Cores 8-70-5, 8-70-7, 8-70A-9)
Published: 1971
License: https://creativecommons.org/licenses/by/3.0/

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Published: 1971 (exact date unknown) • DOI registered: 2016-12-15

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Abstract:

Site 70 is located about 20 miles north of the northern boundary of the Clipperton Fracture Zone near 140° W. It is the northernmost of the N-S line of sites drilled during Leg 8 to investigate the east-west trending accumulation of sediment centered at about 2°N near 140°W. It lies about 500 miles south of Site 42 of Leg 5, the southernmost of a line of sites continuing to the north. The R/V Argo SCAN survey indicated that the area was one of low, broad abyssal hills, 2 to 10 miles in width on E-W profiles, with relatively thick sediment cover.

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: 6.334700 * Longitude: -140.362000

Date/Time Start: 1969-10-23T00:00:00 * Date/Time End: 1969-10-23T00:00:00

Minimum DEPTH, sediment/rock: 43.25 m * Maximum DEPTH, sediment/rock: 191.25 m

Event(s):

8-70 * Latitude: 6.334700 * Longitude: -140.362000 * Date/Time: 1969-10-23T00:00:00 * Elevation: -5059.0 m * Penetration: 113 m * Recovery: 98 m * Location: North Pacific/BASIN * Campaign: * Basis: Glomar Challenger * Method/Device: Drilling/drill rig (DRILL) * Comment: 12 cores; 108 m cored; 0 m drilled; 90.7 % recovery

8-70A * Latitude: 6.334700 * Longitude: -140.362000 * Date/Time: 1969-10-23T00:00:00 * Elevation: -5059.0 m * Penetration: 331 m * Recovery: 146.4 m * Location: North Pacific/BASIN * Campaign: * Basis: Glomar Challenger * Method/Device: Drilling/drill rig (DRILL) * Comment: 30 cores; 218 m cored; 0 m drilled; 67.2 % 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	Sediment type	Sediment
10	Comment	Comment
11	Description	Description

License:

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

Size:

26 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 Sediment	10 Comment	11 Description
8-70	8-70-5-6,85-1	8-70-5-6,85	43.25	Buried	Mn nodule	1	2.0 cm	Ooze	Radiolarian ooze (Lower Miocene)	One manganese nodule about 2 centimeters in diameter occurs in a bed of radiolarian ooze at 43.25 meters below the sea floor. ( SITE 70 Core 5 Cored interval: 35-44 m, page 70 )
8-70	8-70-7-7,21-1	8-70-7-7,21	60.21	Buried	Mn nodule	1	1.0 cm	Ooze	Radiolarian nanno ooze. Very pale brown (10YR7/3) to white, the whiter the color, the higher the carbonate content (Lower Miocene)	A hard manganese nodule about 1 centimeter in diameter occurs at 60.21 meters below the sea floor. ( SITE 70 Core 7 Cored interval: 53-62 m, page 174 )
8-70A	8-70A-9-4,75-1	8-70A-9-4,75	191.25	In sediment	Mn micronodule	Several		Ooze	Radiolarian nanno ooze. Semi indurated. Bluish white to light greenish gray (Upper Oligocene)	Speckled with black Mn oxides. ( SITE 70A Core 9A Cored interval: 186-192 m, page 202 )