Asperities and Barriers along the Japan Trench East of Tohoku from the Distribution of Earthquake Source Areas

1985 ◽  
pp. 863-877
Author(s):  
Manfred Baer
Keyword(s):  
Earthquake Source ◽  
Japan Trench ◽  
Source Areas

An updated sediment source areas inventory in the Rio Cordon catchment (Dolomites)

2017 ◽  
Vol 42 ◽  
pp. 10-13 ◽  
Author(s):  
Caterina Ferrato ◽  
Jessica De Marco ◽  
Paolo Tarolli ◽  
Marco Cavalli
Keyword(s):  
Sediment Source ◽  
Source Areas

EARTHQUAKE SOURCE PARAMETER AND FOCAL MECHANISM ESTIMATES FOR THE WESTERN QUEBEC SEISMIC ZONE IN EASTERN CANADA

2017 ◽  
Author(s):  
Alba M. Rodriguez Padilla ◽  
◽  
John Onwuemeka ◽  
John Onwuemeka ◽  
Yajing Liu ◽  
...  
Keyword(s):  
Focal Mechanism ◽  
Earthquake Source ◽  
Source Parameter ◽  
Seismic Zone ◽  
Eastern Canada

THE SEDIMENTARY AND ISOTOPIC SIGNATURE OF THE 2011 TOHOKU EARTHQUAKE AND TSUNAMI AND PRIOR EARTHQUAKES, JAPAN TRENCH

2019 ◽  
Author(s):  
McCain Moore ◽  
◽  
Cecilia M.G. McHugh ◽  
Leonardo Seeber ◽  
Kazuko Usami ◽  
...  
Keyword(s):  
Tohoku Earthquake ◽  
Isotopic Signature ◽  
2011 Tohoku Earthquake ◽  
Japan Trench ◽  
The 2011 Tohoku Earthquake

Presumed Trade and Aberrant Pottery

1949 ◽  
Vol 5 ◽  
pp. 130-145
Author(s):  
Alex D. Krieger
Keyword(s):  
Mississippi Valley ◽  
Lower Mississippi Valley ◽  
Great Range ◽  
Source Areas ◽  
Site Occupation ◽  
Foreign Origin ◽  
Pronounced Deviation

The pottery in the following sections is not considered to belong to the Alto Focus complex, but to occur with it at different points in the Davis site occupation by trade or other means. If the writer appears to vacillate over what is and what is not trade pottery here, it is due in part to the problem of separating what could have been produced at the site (as extreme variations of resident styles) from what probably was not (because of some distinctive attribute which would mark it as foreign). In certain cases of pronounced deviation, a foreign origin is obvious enough, particularly when the source areas are well known. But where the whole tradition is similar as in the clay-tempered pottery of the lower Mississippi Valley region, and a great range of decorative techniques was employed for long periods of time, the problem is not easy.

scholarly journals Mantle-derived helium released through the Japan trench bend-faults

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Jin-Oh Park ◽  
Naoto Takahata ◽  
Ehsan Jamali Hondori ◽  
Asuka Yamaguchi ◽  
Takanori Kagoshima ◽  
...  
Keyword(s):  
Upper Mantle ◽  
Large Scale ◽  
Japan Trench ◽  
Helium Isotope ◽  
Normal Faults ◽  
Circulation System ◽  
Deep Penetration ◽  
Oceanic Plate ◽  
Seismic Reflection Data ◽  
Reflection Data

AbstractPlate bending-related normal faults (i.e. bend-faults) develop at the outer trench-slope of the oceanic plate incoming into the subduction zone. Numerous geophysical studies and numerical simulations suggest that bend-faults play a key role by providing pathways for seawater to flow into the oceanic crust and the upper mantle, thereby promoting hydration of the oceanic plate. However, deep penetration of seawater along bend-faults remains controversial because fluids that have percolated down into the mantle are difficult to detect. This report presents anomalously high helium isotope (3He/4He) ratios in sediment pore water and seismic reflection data which suggest fluid infiltration into the upper mantle and subsequent outflow through bend-faults across the outer slope of the Japan trench. The 3He/4He and 4He/20Ne ratios at sites near-trench bend-faults, which are close to the isotopic ratios of bottom seawater, are almost constant with depth, supporting local seawater inflow. Our findings provide the first reported evidence for a potentially large-scale active hydrothermal circulation system through bend-faults across the Moho (crust-mantle boundary) in and out of the oceanic lithospheric mantle.

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