scholarly journals Earthquake slip surfaces identified by biomarker thermal maturity within the 2011 Tohoku-Oki earthquake fault zone

2020 ◽  
Vol 11 (1) ◽  
Author(s):  
Hannah S. Rabinowitz ◽  
Heather M. Savage ◽  
Pratigya J. Polissar ◽  
Christie D. Rowe ◽  
James D. Kirkpatrick
Minerals ◽  
2018 ◽  
Vol 8 (9) ◽  
pp. 385 ◽  
Author(s):  
Li-Wei Kuo ◽  
Jyh-Rou Huang ◽  
Jiann-Neng Fang ◽  
Jialiang Si ◽  
Haibing Li ◽  
...  

Graphitization of carbonaceous materials (CM) has been experimentally demonstrated as potential evidence of seismic slip within a fault gouge. The southern segment of the Longmenshan fault, a CM-rich-gouge fault, accommodated coseismic slip during the 2008 Mw 7.9 Wenchuan earthquake and potentially preserves a record of processes that occurred on the fault during the slip event. Here, we present a multi-technique characterization of CM within the active fault zone of the Longmenshan fault from the Wenchuan earthquake Fault Scientific Drilling-1. By contrast with field observations, graphite is pervasively and only distributed in the gouge zone, while heterogeneously crystallized CM are present in the surrounding breccia. The composite dataset that is presented, which includes the localized graphite layer along the 2008 Wenchuan earthquake principal slip zone, demonstrates that graphite is widely distributed within the active fault zone. The widespread occurrence of graphite, a seismic slip indicator, reveals that surface rupturing events commonly occur along the Longmenshan fault and are characteristic of this tectonically active region.


Author(s):  
Wenfeng Zheng ◽  
Xiaolu Li ◽  
Lirong Yin ◽  
Zhengtong Yin ◽  
Bo Yang ◽  
...  

Due to the growing frequency of earthquakes, safeties of human lives and properties are facing serious threats. However, the research in the field of spatial-temporal distribution of earthquake is quite a few. In this paper, we use wavelet model to analyze the spatial-temporal distribution of earthquakes. Because the spatial-temporal distribution of earthquake activity is closely related to the distribution of the earthquake fault zone, we analyze large-scale earthquake clusters by selecting the Eurasia seismic belt and the surrounding region as the research area. From the perspective of the time domain, the results show that the seismic energy of the earthquake fault zone presences compact support or similar compact support distribution, suggesting that the seismic zone exists a relatively quiet period and active stage. This indicate that the seismic zone is periodical. The period of strong earthquakes above normal and less than normal is different by time changes. The cycles of earthquakes are different due to different regions and different geological and geographical environment.


2013 ◽  
Vol 33 (2) ◽  
pp. 454-463
Author(s):  
林青 LIN Qing ◽  
曾军 ZENG Jun ◽  
张涛 ZHANG Tao ◽  
马晶 MA Jing ◽  
王重 WANG Zhong ◽  
...  

2014 ◽  
Vol 619-620 ◽  
pp. 58-69 ◽  
Author(s):  
Dongliang Liu ◽  
Haibing Li ◽  
Teh-Quei Lee ◽  
Yu-Min Chou ◽  
Sheng-Rong Song ◽  
...  

Geology ◽  
1995 ◽  
Vol 23 (9) ◽  
pp. 839 ◽  
Author(s):  
Michael B. Underwood ◽  
Matthew M. Laughland ◽  
Kevin L. Shelton ◽  
Richard L. Sedlock
Keyword(s):  

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