Description of manganese deposits collected by R/V Nothwind during the 1963 expedition in the Laptev sea
The 400-km-wide, low gradient Laptev Sea continental shelf consists of flat terrace-like features at regular depth intervals from 10 to 40 m below present sea level. The five large submarine valleys traversing the shelf do not continuously grade seaward, but contain elongated, closed basins. These t...
Main Authors: | , |
---|---|
Format: | Dataset |
Language: | English |
Published: |
PANGAEA
1974
|
Subjects: | |
Online Access: | https://doi.pangaea.de/10.1594/PANGAEA.859299 https://doi.org/10.1594/PANGAEA.859299 |
id |
ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.859299 |
---|---|
record_format |
openpolar |
spelling |
ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.859299 2024-09-15T17:51:44+00:00 Description of manganese deposits collected by R/V Nothwind during the 1963 expedition in the Laptev sea Holmes, M L Creager, Joe S MEDIAN LATITUDE: 76.112500 * MEDIAN LONGITUDE: 129.875000 * SOUTH-BOUND LATITUDE: 75.792000 * WEST-BOUND LONGITUDE: 129.867000 * NORTH-BOUND LATITUDE: 76.433000 * EAST-BOUND LONGITUDE: 129.883000 * DATE/TIME START: 1963-09-02T00:00:00 * DATE/TIME END: 1963-09-02T00:00:00 * MINIMUM DEPTH, sediment/rock: 0 m * MAXIMUM DEPTH, sediment/rock: 0 m 1974 text/tab-separated-values, 15 data points https://doi.pangaea.de/10.1594/PANGAEA.859299 https://doi.org/10.1594/PANGAEA.859299 en eng PANGAEA 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 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 https://doi.pangaea.de/10.1594/PANGAEA.859299 https://doi.org/10.1594/PANGAEA.859299 CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess Supplement to: Holmes, M L; Creager, Joe S (1974): Holocene History of the Laptev Sea Continental Shelf (Chapter 9). In: Herman, Y. (Ed.) Marine Geology and Oceanography of the Arctic Seas. Springer Berlin Heidelberg, 211-229, https://doi.org/10.1007/978-3-642-87411-6_9 Deposit type DEPTH sediment/rock Description Event label GC Gravity corer Identification Laptev Sea NOAA and MMS Marine Minerals Geochemical Database NOAA-MMS Northwind NW63 NW63-143 NW63-145 Position Quantity of deposit Sediment type Size Substrate type Visual description dataset 1974 ftpangaea https://doi.org/10.1594/PANGAEA.85929910.1007/978-3-642-87411-6_910.7289/V52Z13FT10.7289/V53X84KN 2024-07-24T02:31:33Z The 400-km-wide, low gradient Laptev Sea continental shelf consists of flat terrace-like features at regular depth intervals from 10 to 40 m below present sea level. The five large submarine valleys traversing the shelf do not continuously grade seaward, but contain elongated, closed basins. These terraces and closed basins plus deltaic sediments associated with the submarine valleys quite possibly mark sea level Stillstands, and enable reconstruction of the paleogeography of the Laptev Sea shore line at five periods during post-Wisconsin (Holocene) time. Radiocarbon dates on the silty-clay to clayey-silt sediments from cores of the northeastern Laptev Sea indicate average sedimentation intensity of 2 to 15 mg/cm2/yr. The presence of manganese nodules and crusts in surface samples from less than 55 m depths and a general decrease in total foraminiferal abundances with depth in the cores suggest that the present deposition rate is less than when sea level was lower. The main components of the shelf deposits are near- shore sediments which were spread over the shelf as Holocene sea level fluctuated and marine currents distributed modern fine sediment. Rare silty-sand layers and the coarser nuclei of the manganese crusts and nodules indicate ice rafting. However, this mechanism is probably only locally important as a significant transporting agent. Dataset Arctic laptev Laptev Sea PANGAEA - Data Publisher for Earth & Environmental Science ENVELOPE(129.867000,129.883000,76.433000,75.792000) |
institution |
Open Polar |
collection |
PANGAEA - Data Publisher for Earth & Environmental Science |
op_collection_id |
ftpangaea |
language |
English |
topic |
Deposit type DEPTH sediment/rock Description Event label GC Gravity corer Identification Laptev Sea NOAA and MMS Marine Minerals Geochemical Database NOAA-MMS Northwind NW63 NW63-143 NW63-145 Position Quantity of deposit Sediment type Size Substrate type Visual description |
spellingShingle |
Deposit type DEPTH sediment/rock Description Event label GC Gravity corer Identification Laptev Sea NOAA and MMS Marine Minerals Geochemical Database NOAA-MMS Northwind NW63 NW63-143 NW63-145 Position Quantity of deposit Sediment type Size Substrate type Visual description Holmes, M L Creager, Joe S Description of manganese deposits collected by R/V Nothwind during the 1963 expedition in the Laptev sea |
topic_facet |
Deposit type DEPTH sediment/rock Description Event label GC Gravity corer Identification Laptev Sea NOAA and MMS Marine Minerals Geochemical Database NOAA-MMS Northwind NW63 NW63-143 NW63-145 Position Quantity of deposit Sediment type Size Substrate type Visual description |
description |
The 400-km-wide, low gradient Laptev Sea continental shelf consists of flat terrace-like features at regular depth intervals from 10 to 40 m below present sea level. The five large submarine valleys traversing the shelf do not continuously grade seaward, but contain elongated, closed basins. These terraces and closed basins plus deltaic sediments associated with the submarine valleys quite possibly mark sea level Stillstands, and enable reconstruction of the paleogeography of the Laptev Sea shore line at five periods during post-Wisconsin (Holocene) time. Radiocarbon dates on the silty-clay to clayey-silt sediments from cores of the northeastern Laptev Sea indicate average sedimentation intensity of 2 to 15 mg/cm2/yr. The presence of manganese nodules and crusts in surface samples from less than 55 m depths and a general decrease in total foraminiferal abundances with depth in the cores suggest that the present deposition rate is less than when sea level was lower. The main components of the shelf deposits are near- shore sediments which were spread over the shelf as Holocene sea level fluctuated and marine currents distributed modern fine sediment. Rare silty-sand layers and the coarser nuclei of the manganese crusts and nodules indicate ice rafting. However, this mechanism is probably only locally important as a significant transporting agent. |
format |
Dataset |
author |
Holmes, M L Creager, Joe S |
author_facet |
Holmes, M L Creager, Joe S |
author_sort |
Holmes, M L |
title |
Description of manganese deposits collected by R/V Nothwind during the 1963 expedition in the Laptev sea |
title_short |
Description of manganese deposits collected by R/V Nothwind during the 1963 expedition in the Laptev sea |
title_full |
Description of manganese deposits collected by R/V Nothwind during the 1963 expedition in the Laptev sea |
title_fullStr |
Description of manganese deposits collected by R/V Nothwind during the 1963 expedition in the Laptev sea |
title_full_unstemmed |
Description of manganese deposits collected by R/V Nothwind during the 1963 expedition in the Laptev sea |
title_sort |
description of manganese deposits collected by r/v nothwind during the 1963 expedition in the laptev sea |
publisher |
PANGAEA |
publishDate |
1974 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.859299 https://doi.org/10.1594/PANGAEA.859299 |
op_coverage |
MEDIAN LATITUDE: 76.112500 * MEDIAN LONGITUDE: 129.875000 * SOUTH-BOUND LATITUDE: 75.792000 * WEST-BOUND LONGITUDE: 129.867000 * NORTH-BOUND LATITUDE: 76.433000 * EAST-BOUND LONGITUDE: 129.883000 * DATE/TIME START: 1963-09-02T00:00:00 * DATE/TIME END: 1963-09-02T00:00:00 * MINIMUM DEPTH, sediment/rock: 0 m * MAXIMUM DEPTH, sediment/rock: 0 m |
long_lat |
ENVELOPE(129.867000,129.883000,76.433000,75.792000) |
genre |
Arctic laptev Laptev Sea |
genre_facet |
Arctic laptev Laptev Sea |
op_source |
Supplement to: Holmes, M L; Creager, Joe S (1974): Holocene History of the Laptev Sea Continental Shelf (Chapter 9). In: Herman, Y. (Ed.) Marine Geology and Oceanography of the Arctic Seas. Springer Berlin Heidelberg, 211-229, https://doi.org/10.1007/978-3-642-87411-6_9 |
op_relation |
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 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 https://doi.pangaea.de/10.1594/PANGAEA.859299 https://doi.org/10.1594/PANGAEA.859299 |
op_rights |
CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1594/PANGAEA.85929910.1007/978-3-642-87411-6_910.7289/V52Z13FT10.7289/V53X84KN |
_version_ |
1810293717569896448 |