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The Sedimentation and Formation Mechanism of Lacustrine Endogenic Debris Flow
Author(s) -
Deping Wang
Publication year - 1992
Publication title -
acta geologica sinica ‐ english edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.444
H-Index - 61
eISSN - 1755-6724
pISSN - 1000-9515
DOI - 10.1111/j.1755-6724.1992.mp5002001.x
Subject(s) - debris flow , subaerial , debris , geology , sedimentation , mudflow , matrix (chemical analysis) , flow (mathematics) , sediment , geotechnical engineering , flume , geochemistry , geomorphology , chemistry , mechanics , oceanography , physics , chromatography
The debris flow formed by mass transportation of lacustrine deltaic sediments is quite unique compared with subaerial one, and is called “endogenic debris flow” in this paper. The major diagnostic features of endogenic debris flow sediments are muddy rip‐ups, sandy lumps, randomly distributed carbonaceous plant leaves and rhyotaxitic structure. However, such debris flow can not be completely generalized by the conclusion that larger granules are supported by cohesive strength of the matrix. The fact that sediments can be transported in plastic state is considered to be related with two different functions of combined clay‐water materials: serving as a matrix in texture and as an adhesive between grains. This paper also discusses the origin and sediment types of endogenic debris flow as well as the general concepts of matrix and debris flow. From the viewpoint of “true debris flow”, this paper attempts to generalize and illustrate the basic features and variation of endogenic debris flow sediments on the basis of the Bingham (Coulomb‐viscosity) model.