Unlike a commonly occurred landslide, a particular large-scale landslide and its associated tektite and rock eruption were induced in Chiu-Fen-Erh-Shan in the 1999 Chi-Chi earthquake. High friction heat can promote to form the genesis of tektite under the conditions of low water content in rock and high ratio of slip distance to slip zone thickness. The rock eruption in Chiu-Fen-Erh-Shan probably resulted from the following: (1) the secondary fault was relatively displaced by the propagation of the seismic wave, yielding the vaporization of pore water by high friction heat and the subsquential rock eruption in fracture by high seismic acceleration; (2) high friction heat which was induced in the landsliding processes might have heated up the pore water and thus elevated the pore water pressure. The rock might be uplifted and erupted when the uplift force exceeded over the downward force during the period of high seismic acceleration. The mechanism and location for eruption as well as the geological features after eruption might be different between the above-mentioned causes.
|Translated title of the contribution||Possible causes for the rock eruption in the Chiu-Fen-Erh-Shan in the 1999 Chi-Chi earthquake|
|Number of pages||8|
|Publication status||Published - 2005 Dec|
All Science Journal Classification (ASJC) codes
- Earth and Planetary Sciences(all)