Citation:

dsdp.proc.21.1973

Name: Annotated record of the detailed examination of Mn deposits from DSDP Leg 21 (Sites 204, 205)
Published: 1973
License: https://creativecommons.org/licenses/by/3.0/

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Published: 1973 (exact date unknown) • DOI registered: 2017-01-02

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Abstract:

The oceanic region between the Tonga-Kermadec Trench and New Zealand to the east and Australia to the west (see map at the back of this volume) has long been regarded as an anomalous region. Prior to development of the plate tectonic theory, it was known that the eastern boundary of the region was tectonically active, the western relatively passive. The DSDP Leg 21 overall objective was to provide initial coring data which would aid in reconstructing the tectonic history and relative plate movements of the Pacific and Indian crustal plates and determining the age of the tectonic features contained within the Tasman Sea region. In particular, the age and biostratigraphy of the oldest Pacific crustal section now being subducted into the Tonga-Kermadec Trench (Site 204) and the age and composition of the South Fiji Basin and of the basement rock (Site 205).

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:

Median Latitude: -25.235500 * Median Longitude: 1.893850 * South-bound Latitude: -25.516500 * West-bound Longitude: -174.111500 * North-bound Latitude: -24.954500 * East-bound Longitude: 177.899200

Date/Time Start: 1971-11-20T00:00:00 * Date/Time End: 1971-11-24T00:00:00

Minimum DEPTH, sediment/rock: 49.05 m * Maximum DEPTH, sediment/rock: 337.35 m

Event(s):

21-204 * Latitude: -24.954500 * Longitude: -174.111500 * Date/Time: 1971-11-20T00:00:00 * Elevation: -5354.0 m * Penetration: 150 m * Recovery: 49.4 m * Location: South Pacific/TRENCH * Campaign: * Basis: Glomar Challenger * Method/Device: Drilling/drill rig (DRILL) * Comment: 9 cores; 79 m cored; 0 m drilled; 62.5 % recovery

21-205 * Latitude: -25.516500 * Longitude: 177.899200 * Date/Time: 1971-11-24T00:00:00 * Elevation: -4320.0 m * Penetration: 355 m * Recovery: 134 m * Location: South Pacific/BASIN * Campaign: * Basis: Glomar Challenger * Method/Device: Drilling/drill rig (DRILL) * Comment: 24 cores; 216 m cored; 72 m drilled; 62 % 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:

36 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
21-204	21-204-3-1,100-110-1	21-204-3-1,100-110	49.05	Buried	Mn nodule	3	1.0-2.0 cm		Ash	Dark greenish gray, iron oxide and feldspar bearing glass-shard ash with some clayey silt (Middle Miocene)	3 Mn nodules, 1 to 2 cm in diameter. ( Site 204, Core 3, Cored interval 48-57 m, page 45 )
21-204	21-204-3-2,40-1	21-204-3-2,40	50.40	Buried	Mn nodule	2	1.0-2.0 cm		Ash	Nanno rich glass shard ash, dark olive gray (Middle Miocene)	2 Mn nodules, 1 to 2 cm in diameter. ( Site 204, Core 3, Cored interval 48-57 m, page 45 )
21-205	21-205-10-1,75-1	21-205-10-1,75	83.75	Buried	Mn coating	Several		Fragment; glass	Ash	Dark greenish gray, iron oxide and feldspar bearing glass-shard ash with some clayey silt (Middle Eocene)	Much of the glass is devitrified and coated by Mn-Fe oxides, black and indurated. ( Site 205, Core 10, Cored interval 83-92 m, page 75 )
21-205	21-205-30-2,0-70-1	21-205-30-2,0-70	337.35	Buried	Mn coating	Several		Rock; limestone	Limestone	Nanno limestone cut by basalt (Middle Oligocene)	Mn-Fe dendrites (black) extend from contact with basalt into limestone. ( Site 205, Core 31, Cored interval 337-346 m, page 82 )