Study of the Slump Structure on the Yellow River Delta During Its in Zero

ZHONG Jian hua; LI Li

On the delta during Yellow River in zero,there developed a great number of slump structures,which might be formed near the edge of point bar and channel bar or in the channel developed whithin the point bar or channel bar,as well as in the river course.Slump may result in three products:one is slump wall and/or slump crack;the second is slump body,and the third is slump deformation basement.The slump wall and/or slump crack could be divided into two types according to the dynamic mechanics：one is of extension and the other of shearing.They has different sizes:the largest has more than ten meters in length and the smaller is not beyond three to five centimeters in length.The slump body is also defferent in sizes,and the largest may have one meter high and two or three meters long.and the smaller is a few centimeters in height and length.The observation indicates that the slump has been caused by wave and/or runing water washing and not by earthquake and/or sliding on slope. Interrupting of the Yellow River flow results in forming small ‘lake'in some lower courses and the water in the ‘lake'is blown by wind to forming wave.The wave-washing causes the wall of point bar and channel bar collapse,forming a series of slump structures.Interrupting of the Yellow River flow,meanwhile,makes almost all the point bar and channel bar exposed wholly and the rainfall in Yellow River delta is concentrated to form small runoff in the bar surface,which scours walls of the bar,resulting in forming a series of slump structures.Some of slump structures are buried by wind-induced sand and easily preserved,and the wind-induced sand filling in the slump fissures will become sand walls by diagenesis.

Resource Science Department,Resource Institute,Petroleum University of China,Dongying,Shangdong 257062

Received Date: 1998-11-04

Rev Recd Date: 1999-03-09

Publish Date: 2000-03-10

Key words:

slump structure /
delta /
Yellow River

Abstract: On the delta during Yellow River in zero,there developed a great number of slump structures,which might be formed near the edge of point bar and channel bar or in the channel developed whithin the point bar or channel bar,as well as in the river course.Slump may result in three products:one is slump wall and/or slump crack;the second is slump body,and the third is slump deformation basement.The slump wall and/or slump crack could be divided into two types according to the dynamic mechanics：one is of extension and the other of shearing.They has different sizes:the largest has more than ten meters in length and the smaller is not beyond three to five centimeters in length.The slump body is also defferent in sizes,and the largest may have one meter high and two or three meters long.and the smaller is a few centimeters in height and length.The observation indicates that the slump has been caused by wave and/or runing water washing and not by earthquake and/or sliding on slope. Interrupting of the Yellow River flow results in forming small ‘lake'in some lower courses and the water in the ‘lake'is blown by wind to forming wave.The wave-washing causes the wall of point bar and channel bar collapse,forming a series of slump structures.Interrupting of the Yellow River flow,meanwhile,makes almost all the point bar and channel bar exposed wholly and the rainfall in Yellow River delta is concentrated to form small runoff in the bar surface,which scours walls of the bar,resulting in forming a series of slump structures.Some of slump structures are buried by wind-induced sand and easily preserved,and the wind-induced sand filling in the slump fissures will become sand walls by diagenesis.

HTML

Reference (18)

[1]	钟建华.黄河三角洲上3种典型的沉积物构造构造[J].西北大学学报，1996(增刊)，506～510
[2]	钟建华，马在平.一种特殊的沉积构造—泥砂钟乳[J].科学通报，1997，42(17)：1 853～1 856
[3]	Plint A G.Slump blocks,intraformationa conglomerates and associated erosional structures in Pennsylvanian fluvial strata of eastern Canada[J].Sedimentology,1986,33：387～399
[4]	Van de Poll H W，Patel I M.Slump blocks,intraformational conglomerates and associated erosional structures in Pennsylvanian fluvial strata of eastern Canada[J].Sedimentology,1989,36：137～145
[5]	Plint A G.Slump blocks,intraformational conglomerates and associated erosional structures in Pennsylvanian fluvial strata of eastern Canada[J].Sedimentology,1989,36：145～150
[6]	钟建华，马在平.黄河三角洲上的变形层理的研究[J].沉积学报.1989，16(1)：13～19
[7]	Lopea-Gamundi O R.Pebbly mudstones in the Gretaceous Pigeon Point Formation,western California：a study in the transitional stages from submarine slumps to cohesive debris flows.Geology,1993,84：37～50
[8]	Hansen E.Strain Faciesl[M].New York：Springer-Verlag,1977
[9]	Sims J D.Earthquake-induced structures in sediments of Van Norman Lake,San Fennando,California[J].Science,1990,182：161～163
[10]	Owen G.Soft-sediment deformation in upper proterozoic Torridonian sandstones (Applecross Formations) at Torridon,northwest Scotland[J].Jour.Sedim.Res.1995,A65(3)：495～504
[11]	Williams G E.Soft-sediment deformation structures from the Marinoan glacial succession,Adelaide foldbelt：implications for the palaeolatituto of late Neoproterozoic glaciation[J].Sedimentary Geology,1996,106：165～175
[12]	Stone B D.Analysis of slump slip lines and deformation fabric in slumped Pleistocene Lake Beds[J].Jour.Sed.Petrology,1976,46：313～325
[13]	Tama's H. Lantos M.An evaluation of slump fold formation using palaeomagnetic techniques[J].Sedimentary Geology,1994,90：233～240
[14]	Gibling M R.and Rust B R.Channel margins in a Pennsylvanian braided fluvial deposit;the Morien Group near Sydney,Nova Scotia Canada[J].Jour.Sedim.Petrol.1984,54：773～782
[15]	Harvey L D.Shearing and Kolking phenomena in fluval sediments.Old Crow,Yukon Territory,Canada[J].Jour.Sedim.Petrol.1980,50：787～792
[16]	Blatt H Middleton G,Murray R.Origin of sedimentary rocks[M].Prentice-Hall,Inc.Englewood Cliffs,New Jersey.1980
[17]	刘宝王　君主编.沉积岩石学[M].北京：地质出版社.1980
[18]	陈景山，冯增昭等.沉积构造.中国沉积学[M].北京：石油工业出版社.1994

Study of the Slump Structure on the Yellow River Delta During Its in Zero

Abstract

References

Proportional views

通讯作者: 陈斌, bchen63@163.com

Article Metrics

Proportional views

Related