Received date: 1999-09-23
Revised date: 1999-11-26
Online published: 2000-08-01
Earthquake is a disaster event in Earth crust. Earthquake, tsunami and turbidity flow induced by earthquake can form seismites, tsunamites and seismoturbidites. During earthquake, some especial deformation structures (fracture-grading bed, fracture-uniform bed, syn-sedimentary microfracture,micro-corrugated lamination, gravity faultetc.) and sedimentary and diagenitic structure (sandstone vein,mudstone vein, micritic vein, i.e. molar tooth structure, pillow bed, sandy volcano, muddy volcano,penecontemporneous deformation structures and hummocky bedding) are formed. Seism-deposits consist of 3 types of sedimentary units. Unit-A is autochthonous seismites, which consists of seismic corrugated rock, shattering rock, and autoclastic breccia and intraclast parabreccia. Unit-B is tsunamite, which is
composed of pebble sandstone, sandstone and intraclastic limestone with hummocky bedding or swaley bedding and parallel bedding. Unit-C is seismoturbidites or megaturbidite, which is composed of coarse clastics and intraclastic limestone with massive bedding, graded bedding or Bouma sequence. Aforesaid units and background deposits (Unit 4) constitute 6 types of sedimentary sequences: A-B-C-D、A-B-D、A-C-D、A-D、B-D、C-D.
Key words： Sedimentology; Earthquake; Seaquake; Tsunami; Tsunamites; Seismoturbidites.
DU Yuan-sheng, HAN Xin . SEISMO-DEPOSITION AND SEISMITES[J]. Advances in Earth Science, 2000 , 15(4) : 389 -394 . DOI: 10.11867/j.issn.1001-8166.2000.04.0389
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