caa a22 4500 477047335 CHVBK 20180405111333.0 cr unu---uuuuu 170330e19960901xx s 000 0 eng 10.1007/BF00874742 doi (NATIONALLICENCE)springer-10.1007/BF00874742 Aseismio fault slip and block deformation in North China [Elektronische Daten] [Lanbo Liu, Alan Linde, I. Sacks, Shihai He] In North China, the tectonic fault-block system enables us to use the Discontinuous Deformation Analysis (DDA) method to simulate the long-term cross-fault survey and other geodetic data related to aseismic tectonic deformation. By the simulation we have found that: (1) Slips on faults with different orientation are generally in agreement with the ENE-WSW tectonic stress field, but the slip pattern of faulting can vary from nearly orthogonal, to pure shear along the strike of the faults, this pattern cannot be explained by simple geometric relation between the strike of the fault and the direction of the tectonic shortening. This phenomenon has been observed at many sites of cross-fault geodetic surveys, and might be caused by the interactions between different blocks and faults. (2) According to the DDA model, if the average aseismic slip rate along major active faults is at the order of several tenths of millimeter per year as observed by the cross-fault geodetic surveys, the typical strain rate inside a block is at the order of 10−8 year−1 or less, so that the rate of 10−6 year−1, as reported by observations in smaller areas, cannot be the representative deformation rate in this region. (3) Between the slips caused by regional compression and block rotation, there is a possibility that the sense of slip caused by rigid body rotation in two adjacent blocks is opposite to the slip caused by the tectonic compression. But the magnitude of slip resulting from the tectonic compression is much larger than that due to the block rotation. Thus, in general, the slip pattern on faults as a whole agrees with the sense of tectonic compression in this region. That is to say, the slip caused by regional compression dominates the entire slip budget. (4) Based on (3), some observed slips in contradiction to ENE tectonic stress field may be caused by more localized sources, and have no tectonic significance. Birkhäuser Verlag, 1996 Discontinuous Deformation Analysis (DDA) nationallicence North China nationallicence fault-block system nationallicence aseismic fault slip nationallicence block rotation nationallicence Liu Lanbo Department of Terrestrial Magnetism, Carnegie Institution of Washington, 20015-1305, Washington, D.C., USA aut Linde Alan Department of Terrestrial Magnetism, Carnegie Institution of Washington, 20015-1305, Washington, D.C., USA aut Sacks I. Department of Terrestrial Magnetism, Carnegie Institution of Washington, 20015-1305, Washington, D.C., USA aut He Shihai Center for Analysis and Prediction, State Seismological Bureau, 100036, Beijing, P. R. China aut pure and applied geophysics Birkhäuser-Verlag 146/3-4(1996-09-01), 717-740 0033-4553 146:3-4<717 1996 146 24 https://doi.org/10.1007/BF00874742 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF00874742 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Liu Lanbo Department of Terrestrial Magnetism, Carnegie Institution of Washington, 20015-1305, Washington, D.C., USA aut NATIONALLICENCE 700 1- Linde Alan Department of Terrestrial Magnetism, Carnegie Institution of Washington, 20015-1305, Washington, D.C., USA aut NATIONALLICENCE 700 1- Sacks I. Department of Terrestrial Magnetism, Carnegie Institution of Washington, 20015-1305, Washington, D.C., USA aut NATIONALLICENCE 700 1- He Shihai Center for Analysis and Prediction, State Seismological Bureau, 100036, Beijing, P. R. China aut NATIONALLICENCE 773 0- pure and applied geophysics Birkhäuser-Verlag 146/3-4(1996-09-01), 717-740 0033-4553 146:3-4<717 1996 146 24 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer