Imaging of the subducted Kyushu-Palau Ridge in the Hyuga-nada region, western Nankai Trough subduction zone

2013 ◽  
Vol 589 ◽  
pp. 90-102 ◽  
Author(s):  
Yojiro Yamamoto ◽  
Koichiro Obana ◽  
Tsutomu Takahashi ◽  
Ayako Nakanishi ◽  
Shuichi Kodaira ◽  
...  
Keyword(s):  
Subduction Zone ◽  
Nankai Trough

scholarly journals Temperature limits to deep subseafloor life in the Nankai Trough subduction zone

Science ◽  
2020 ◽  
Vol 370 (6521) ◽  
pp. 1230-1234
Author(s):  
Verena B. Heuer ◽  
Fumio Inagaki ◽  
Yuki Morono ◽  
Yusuke Kubo ◽  
Arthur J. Spivack ◽  
...  
Keyword(s):  
Subduction Zone ◽  
Marine Sediment ◽  
Nankai Trough ◽  
Microbial Populations ◽  
Vegetative Cells ◽  
Microbial Life ◽  
Sediment Volume ◽  
Subsurface Sediments ◽  
Cell Concentrations ◽  
Deep Subseafloor

Microorganisms in marine subsurface sediments substantially contribute to global biomass. Sediments warmer than 40°C account for roughly half the marine sediment volume, but the processes mediated by microbial populations in these hard-to-access environments are poorly understood. We investigated microbial life in up to 1.2-kilometer-deep and up to 120°C hot sediments in the Nankai Trough subduction zone. Above 45°C, concentrations of vegetative cells drop two orders of magnitude and endospores become more than 6000 times more abundant than vegetative cells. Methane is biologically produced and oxidized until sediments reach 80° to 85°C. In 100° to 120°C sediments, isotopic evidence and increased cell concentrations demonstrate the activity of acetate-degrading hyperthermophiles. Above 45°C, populated zones alternate with zones up to 192 meters thick where microbes were undetectable.

scholarly journals Hydrocarbon seepage and its sources at mud volcanoes of the Kumano forearc basin, Nankai Trough subduction zone

2014 ◽  
Vol 15 (6) ◽  
pp. 2180-2194 ◽  
Author(s):  
Thomas Pape ◽  
Patrizia Geprägs ◽  
Sebastian Hammerschmidt ◽  
Paul Wintersteller ◽  
Jiangong Wei ◽  
...  
Keyword(s):  
Subduction Zone ◽  
Nankai Trough ◽  
Mud Volcanoes ◽  
Forearc Basin

Diagenesis, sediment strength, and pore collapse in sediment approaching the Nankai Trough subduction zone

2007 ◽  
Vol 119 (3-4) ◽  
pp. 377-390 ◽  
Author(s):  
G. A. Spinelli ◽  
P. S. Mozley ◽  
H. J. Tobin ◽  
M. B. Underwood ◽  
N. W. Hoffman ◽  
...  
Keyword(s):  
Subduction Zone ◽  
Nankai Trough ◽  
Pore Collapse ◽  
Sediment Strength
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