Tectonophysics, 2013, 590: 121-135. They are found in areas of geological compression. .1. The main difference between reverse fault and thrust fault is that in reverse fault one side of the land moves upward while other side remains still whereas thrust fault is a break in the Earth’s crust across which older rocks are pushed above young ones. Song Hong-biao, Liu Shu-gen. 1991. A reverse fault is one where the hanging wall (block) is pushed up relative the the foot wall (block)." What is a Reverse Fault. The Longmenshan fault zone has been a research hotspot, but fewer scholars have paid attention to its transverse faults. In a reverse fault, the hanging wall (right) slides over the footwall (left) due to compressional forces. Such movement can occur in areas where the Earth’s crust is compressed. [7] The Longmenshan Fault is in China. A type of fault formed when the hanging wall fault block moves up along a fault surface relative to the footwall. 2013. This fault was created when two tectonic plates collided with each other, resulting in the rise of mountains next to the Sichuan basin. Scientific.Net is a registered brand of Trans Tech Publications Ltd Since the Ms 8.0 earthquake occurred in Yingxiu, a town in Wenchuan County in Sichuan Province, on May 12, 2008, frequent geological disasters ensued on the land affected by earthquakes in the Longmenshan fault zone have caused a large number of casualties and property losses. Normal fault 2.reverse fault. The line it makes on the Earth's surface is the fault trace. A normal fault occurs when the crust is extended. Therefore, it is the opposite of a normal fault. Wenchuan Earthquake and Scientific Drilling. According to the analysis of regional tectonic, seismic activities, geomorphic features, remote sensing images, and deep geophysical data, combined with field studies, the existence, distribution and type of the transverse faults in the Longmenshan fault zone were demonstrated. But faults can occur within plates as fractures as well. This fault is most likely a Moving wall is called the hanging wall. Question: Instructions:Select the correct answer from the drop-down menu. [3] Strike-slip fault The dip of a reverse fault is There are examples of reverse faults in several continents around the world. 8. [1] Motion on this fault is responsible for the uplift of the mountains relative to the lowlands of the Sichuan Basin to the east. 40 The Longmenshan fault zone is located at a pronounced topographic boundary between the eastern 41 margin of the Tibetan plateau and the western Sichuan basin (Figure 1), where elevation changes from 42 ~5000 m to ~500 m within a distance of ~50 km. The second type of fault is known as a reverse fault. .1. Reverse faults indicate compressive shortening of the crust. A reverse fault is the opposite of a normal fault—the hanging wall moves up relative to the footwall. 0. Low-angle normal faults with regional tectonic significance may be designated detachment faults. It is a flat surface that may be vertical or sloping. convergent boundary. Geologically, the fault zone manifests itself as … This steep changes from 50 to 90 degrees. [9] Copyright © 2020 LoveToKnow. Correct answers: 2 question: For each description, choose the fault it describes. Answers (1) Alexsia April 4, 9:00 PM. It is in the Philippines, the countries main fault line. See more. Reverse dip-slip faults result from horizontal compressional forces caused by a shortening, or contraction, of Earth’s crust. 3. A maximum displacement of ~ 7.3m and a corresponding slip rate of 1.25m/s were inferred from seismological inversion [Zhang et al., 2009]. 1010-1012. Knowledge of the nature and history of the LFZ is important for understanding the growth of continental plateaus and mechanisms for major earthquakes along their margins, as exemplified by the magnitude 7.9 M Wenchuan earthquake of 12 May 2008. Thrust faults are reverse faults that dip less than 45°. (in Chinese) 28-51. The hanging wall moves up and over the footwall. They are common at convergent boundaries. 2008. Master degree thesis. The Longmenshan Fault Zone (LFZ) is a tectonic boundary between the Tibetan Plateau and the Sichuan Basin of the South China Block. Motion on this fault is responsible for the uplift of the mountains relative to the lowlands of the Sichuan Basin to the east. [8] 12 (2019) 387-392. This gives the mountain a leaning, sloping look. A reverse fault is a type of dip-slip fault where one side of the land moves upwards while the other side stays still. : DEFORMATION RATE OF THE LONGMENSHAN FAULT ZONE FROM SEISMIC DATA 889 Fig. Lushan earthquake, earthquake surface rupture zone, blind reverse-fault earthquake, Longmenshan thrust belt, Holocene paleoearthquakes of the Maoergai fault, eastern Tibet [J]. This fault is caused by compression (Squeezing). Understanding the parts of a fault can help you identify what type of fault you’re seeing. What is Normal Fault. Longmenshan fault zone (LFZ), with a maximum vertical offset of ~ 9m [Xu et al., 2009; Zhang et al., 2010]. Focal mechanism solutions indicate that rupture occurred on either a steeply dipping reverse fault or a shallowly dipping thrust fault. The 2013 Mw6.8 Lushan, China earthquake occurred in the southwestern end of the Longmenshan fault zone. [6] And transverse faults can be divided into regional transverse faults and localized transverse faults with NW strike, nearly EW strike and nearly SN strike. ABSTRACT. Fault creep is not reported along Longmenshan fault system and trench surveys (e.g., Ran et al., 2010) revealed past seismic slip along the fault system. H epor onounc r w L 2008 M w 7.9 W thquak . "Dip-slip faults can be again classified into the types "reverse" and "normal". The epicenter of the Lushan earthquake is located near the boundary of the high and low‐velocity anomalies and favorable for a high‐velocity section. The fault plane is where the action is. Well and seismic data cannot be used to effectively identify the internal structures of a fault zone. Journal of Geophysical Research: Solid Earth (1978–2012), 2010, 115(B4). Remote sensing analysis of northewest-striking fault in Wenchuan earthquake zone. 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