Citation:

dsdp.proc.6.107.1971

Name: Annotated record of the detailed examination of Mn deposits from DSDP Site 49, Leg 6 (Cores 49A-1, 49-1)
Published: 1971
License: https://creativecommons.org/licenses/by/3.0/

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Published: 1971 (exact date unknown) • DOI registered: 2016-12-02

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Abstract:

At Sites 47 and 48, impenetrable and cherty Upper Cretaceous chalks were found. The upper part of what infer to be lower Cretaceous is even more reflective, and likely to be very cherty (and was found to be cherty in the Vema core). It became clear that basement could only be reached where the Upper Cretaceous and the upper part of the lower Cretaceous are absent. However, west of Site 48, the R/V Argo record showed an area in which the Upper Cretaceous has wedged out down dip, and the Lower Cretaceous is thinning out by loss of the strongly reflective beds at the top. This area appeared to offer the best chance for sampling the lowermost transparent layer. Two holes were drilled: Hole 49.0 and Hole 49.1 after Hole 49.0 stopped at 18 m. Beds near the base of sedimentary sequence revealed by the seismic profiles are found to be of early Cretaceous (Neocomian) or latest Jurassic (Tithonian) age, and of pelagic facies. The crust under the Shatsky Rise is latest Jurassic or 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: 32.401700 * Longitude: 156.600000

Date/Time Start: 1969-07-02T00:00:00 * Date/Time End: 1969-07-02T00:00:00

Minimum DEPTH, sediment/rock: 0.1 m * Maximum DEPTH, sediment/rock: 11.2 m

Event(s):

6-49 * Latitude: 32.401700 * Longitude: 156.600000 * Date/Time: 1969-07-02T00:00:00 * Elevation: -4282.0 m * Penetration: 18 m * Recovery: 9.7 m * Location: North Pacific/CONT RISE * Campaign: * Basis: Glomar Challenger * Method/Device: Drilling/drill rig (DRILL) * Comment: 2 cores; 9.7 m cored; 0 m drilled; 100 % recovery

6-49A * Latitude: 32.401700 * Longitude: 156.600000 * Date/Time: 1969-07-02T00:00:00 * Elevation: -4282.0 m * Penetration: 19.8 m * Recovery: 10 m * Location: North Pacific/CONT RISE * Campaign: * Basis: Glomar Challenger * Method/Device: Drilling/drill rig (DRILL) * Comment: 2 cores; 14.6 m cored; 0 m drilled; 68.5 % 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	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:

63 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
6-49	6-49-1-1,10-1	6-49-1-1,10	0.1	Buried	Mn nodule	1	Small		Clay	Interlayered brown zeolitic clay, yellow-brown diatomaceous clay with volcanic ash, pale brown nannoplankton marl ooze, and sandy brown clay with abundant volcanic glass (Pleistocene)	A small manganese-iron oxide nodule occurs near the top of this interval. (5 cm ?). ( Figure 5. Summary oflithology in Hole 49.0 Core 1, page 178 )
6-49	6-49-1-1,20-1	6-49-1-1,20	0.2	Buried	Mn nodule	1	Small		Clay	Interlayered brown zeolitic clay, yellow-brown diatomaceous clay with volcanic ash, pale brown nannoplankton marl ooze, and sandy brown clay with abundant volcanic glass (Pleistocene)	A small manganese-iron oxide nodule occurs near the top of this interval. (5 cm ?). ( Figure 5. Summary oflithology in Hole 49.0 Core 1, page 178 )
6-49	6-49-1-4,30-1	6-49-1-4,30	4.8	Buried	Mn nodule	1	7.0 cm		Clay	Mostly yellow-brown to dark brown zeolitic clay with abundant zeolites, rare to common volcanic glass, and scattered rare rhomboherdral crystals of calcite or dolomite (Pleistocene)	A large manganese-iron oxide nodule, 7 centimeters in diameter. ( Figure 5. Summary oflithology in Hole 49.0 Core 1, page 178 )
6-49	6-49-1-5,90-1	6-49-1-5,90	6.9	Buried	Mn coating	Several	0.1 cm thick	Fragment; chert	Clay	Mostly yellow-brown to dark brown zeolitic clay with abundant zeolites, rare to common volcanic glass, and scattered rare rhomboherdral crystals of calcite or dolomite (Pleistocene)	Fragments of brownish yellow (10YR 6/6), glassy chert (5-10 mm thick) coated with Mn (1 mm thick). ( Figure 5. Summary oflithology in Hole 49.0 Core 1, page 178 )
6-49A	6-49A-1-3,90-1	6-49A-1-3,90	9.1	Buried	Mn nodule	1	Small		Mud	Sandy volcanic glass mud (Pleistocene)	Small Mn nodule. ( Figure 13. Summary oflithology in Hole 49.1 Core 1., page 188 )
6-49A	6-49A-1-4,100-1	6-49A-1-4,100	10.7	Buried	Mn nodule	1			Mud	Sandy mud with volcanic glass and nannofossils (Pleistocene)	Mn nodule. ( Figure 13. Summary oflithology in Hole 49.1 Core 1., page 188 )
6-49A	6-49A-1-5,0-1	6-49A-1-5,0	11.2	Buried	Mn nodule	1	8.0 cm		Clay	Red clay with zeolite (Pleistocene)	Mn nodule, 8.0 cm in diameter. ( Figure 13. Summary oflithology in Hole 49.1 Core 1., page 188 )