The Problem of Porosity Rebound in Deep-Sea Sediment Cores: A Comparison of Laboratory and In-Situ Physical-Property Measurements, Site 704, Meteor Rise

1991 ◽  
Author(s):  
D.C. Nobes ◽  
C.J. Mwenifumbo ◽  
J. Mienert ◽  
J.P. Blangy
Keyword(s):  
Deep Sea ◽  
Sediment Cores ◽  
Physical Property ◽  
Deep Sea Sediment

Direct in situ detection of cells in deep-sea sediment cores from the Peru Margin (ODP Leg 201, Site 1229)

Geobiology ◽  
2004 ◽  
Vol 2 (4) ◽  
pp. 217-223 ◽  
Author(s):  
L. MAUCLAIRE ◽  
K. ZEPP ◽  
P. MEISTER ◽  
J. MCKENZIE
Keyword(s):  
Deep Sea ◽  
Sediment Cores ◽  
Deep Sea Sediment ◽  
In Situ Detection

scholarly journals Identification and correlation of distal tephra layers in deep-sea sediment cores, Scotia Sea, Antarctica

1998 ◽  
Vol 27 ◽  
pp. 285-289 ◽  
Author(s):  
S. G. Moreton ◽  
J. L. Smellie
Keyword(s):  
Deep Sea ◽  
Volcanic Ash ◽  
Sediment Cores ◽  
Quaternary Deposits ◽  
Deep Sea Sediment ◽  
Scotia Sea ◽  
Ash Layer ◽  
Tephra Layers ◽  
Major Oxide ◽  
Water Depths

Quaternary deposits in six sediment cores from the Scotia Sea, Antarctica, were examined for the presence of volcanic ash layers. The cores were recovered from water depths of 3369-4025 m. Altogether, 23 ash layers were found, 18 of which have been investigated by electron-probe microanalysis. Deception Island is identified as the source of all the ash layers analyzed. The upper ash layer in each core can be correlated across all six cores, over a distance of -100 km, on the basis of its unusual bimodal composition, major oxide geochemistry and stratigraphie position. Two other ash layers can also be correlated between several of the cores.

scholarly journals Reconstructing 7000 years of North Atlantic hurricane variability using deep-sea sediment cores from the western Great Bahama Bank

2013 ◽  
Vol 28 (1) ◽  
pp. 31-41 ◽  
Author(s):  
Michael R. Toomey ◽  
William B. Curry ◽  
Jeffrey P. Donnelly ◽  
Peter J. van Hengstum
Keyword(s):  
North Atlantic ◽  
Deep Sea ◽  
Sediment Cores ◽  
Deep Sea Sediment ◽  
Great Bahama Bank ◽  
Atlantic Hurricane

AMS-14C Ages Measured in Deep Sea Cores from the Southern Ocean: Implications for Sedimentation Rates during Isotope Stage 2

1989 ◽  
Vol 31 (2) ◽  
pp. 309-317 ◽  
Author(s):  
Edouard Bard ◽  
Laurent Labeyrie ◽  
Maurice Arnold ◽  
Monique Labracherie ◽  
Jean-Jacques Pichon ◽  
...  
Keyword(s):  
Southern Ocean ◽  
Sedimentation Rate ◽  
Deep Sea ◽  
Sediment Cores ◽  
Sea Surface ◽  
Sedimentation Rates ◽  
Deep Sea Sediment ◽  
The Difference ◽  
The Last Glacial Maximum ◽  
The Last Glacial

Abstract14C dates obtained by accelerator mass spectrometry (AMS) on monospecific foraminiferal samples from two deep-sea sediment cores raised in the Indian sector of the Southern Ocean have been corrected for the difference in 14C composition between atmosphere and sea surface by using a reconstruction of the latitudinal 14C gradient which existed in the Southern Ocean prior to 1962. The corrected AMS-14C data show a reduced sedimentation rate in core MD 84-527 between 25,000 and 10,000 yr BP. For core MD 84-551 the available data suggest that the sedimentation rate was higher during the Holocene than during the glacial period. These changes in sedimentation rates may be attributed to an increased opal dissolution during the last glacial maximum.

scholarly journals Detection of Odor Compounds in Deep-sea Sediment Cores from Sagami Bay and Izu-Bonin Trench using Gas Chromatography-olfactometry (GC-O)

2020 ◽  
Vol 30 (0) ◽  
pp. 94-99
Author(s):  
Misato MATSUMOTO ◽  
Hidetaka NOMAKI ◽  
Shinsuke KAWAGUCCI ◽  
Yuki KOGA ◽  
Taiki HIGUCHI ◽  
...  
Keyword(s):  
Gas Chromatography ◽  
Deep Sea ◽  
Sediment Cores ◽  
Sagami Bay ◽  
Deep Sea Sediment ◽  
Gas Chromatography Olfactometry ◽  
Odor Compounds

scholarly journals Development and application of a temperature gradient detector for manned underwater robot

2020 ◽  
Vol 17 (4) ◽  
pp. 172988142091696
Author(s):  
Dewei Li ◽  
Ye Li ◽  
Zhongjun Ding ◽  
Xiangxin Wang ◽  
Baohua Liu
Keyword(s):  
Temperature Gradient ◽  
Deep Sea ◽  
Stability Limit ◽  
In Situ Measurement ◽  
Transient Temperature ◽  
Underwater Robot ◽  
Scientific Application ◽  
Deep Sea Sediment ◽  
Operation Conditions

Manned underwater robot is an important platform to carry various sensors and working tools to finish the in situ measurement and sampling in the deep sea. Due to its limited loading capacity, the device it will be carried, usually, requires to be able to dive to its working depth with a small volume and weight. According to the application requirements of deep-sea sediment temperature gradient in situ measurement observed, a detector system that can obtain data in situ is designed, which mainly includes a titanium alloy electronic cabin and a temperature probe. A comprehensive design analysis method is used to compare and analyze the ultimate static pressure, stability limit load, bending moment load, and transient temperature field on the underwater operation conditions. Optimal dimensions and filled media in the probe are decided. Finally, the pressure resistance test is finished in the lab, and scientific application is conducted on Jiaolong’s 127th dive in the Northwest Indian Ocean, which successfully sampling the temperature gradient data of deep-sea sediments in the Daxi hydrothermal area. The method introduced in this article can effectively improve the safety and reliability of deep-sea structure and greatly reduce costs throughout the design cycle.

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