全新世长江三角洲地区砂体的特征和分布
THE CHARACTERISTICS AND DISTRIBUTION OF HOLOCENE SAND BODIES IN CHANCIIANG RIVER DELTA AREA
-
摘要: 砂体是三角洲的重要沉积单元,它构成三角洲的骨架,决定三角洲的形态,反映三角洲的演变过程,是认识三角洲的关键.砂体的矿物组分能为推断三角洲的物质来源提供重要线索,而其内部特征则是判断沉积环境最灵敏、最可靠的因素.三角洲砂体的上覆和下伏层及其与砂体的接触关系,有助于辩认海进海退和沉积盆地发育历史.此外,三角洲砂体紧靠富含有机质的泥质沉积,是石油和天然气储集的良好场所,是勘探的主要目标.因此,研究三角洲砂体不仅具有理论意义,而且能为沉积矿产资源的勘探提供有价值的资料.Abstract: The Holocene sand bodies in Changjiang River delta area may be classified genetically as river mouth sand, marine sand and river channel-fill sand, which are different in external geometry, internal characteristics, spatial distribution and contact with overlying and underlying beds. Their areal distribution forms a complicated complex that may be considered as a typical sand distribution model of tide-dominated deltas. In Holocene, Changjiang River delta area were subjected to transgression caused by the postglacial rise of sea level, and regression resulting from delta progradation. As a consequence of the alternative transgression and regression sand bodies have the characteristics of two-storeyed beds in vertical sequence. The transgressive sands are overlain by regressive ones, and there is a wedge of marine clay between them.
-
同济大学海洋地质系三角洲科研组,1978.全新世长江三角洲的形成和发育,科学通报,23(5). 李汉瑜译,佩蒂庄等,1977.砂和砂岩,科学出版社. Ball M.M.,1967.Carbonate Sand Bodies of Florida and the Bahamas Jour.Sed.Petrol,37:556-591. Bunch D.A.,1974.Stratigraphis Traps in Sandstones:Exploration Techniques,Oklehoma. Coleman J.M.….,1973.Sedimentation in a Malaysian High Tide Tropical Delta,1972.National Conference on Earth Science. Coleman J.M.and L.D.VVright,1975.Modern River Deltas:Variability of Processes and Sand Bodies,Deltas:Models for Exploration,99-149. Eppo Oomkens,1970.Depasitional Sequences and Sand Destribution in the Postglacial Rhone Delta Complex,Daltaic Sedimentation:Modern and Ancient,ed.Morgan J.M.,198-212. Eppo Oomkens,1974.Lithofacies Relations in the Late Quaternary Niger Dalta Complex,Sedimentation,21(2). Fisher W.L.,…,1969.Delta Systems in the Exploration for Oil and Gas, Austin,Texas.Gould H.R.,1970.The Mississippi Delta Complex,Daltaic Sedimentation:Modern and Anceient,3-30. Off T.,1963.Rhythmic Linear Sand Bodies Cased by Tide Currents,AAPG,47:324-341. Pettijohn F.J.,1975.Sedimentary Rocks,3-d ed. Reineck H.E.and Singh I.B.,1973.Depositional Sedimentary Environments,Springer-Verlag Berlin Heidelberg New York. Wilkinson B.H.and Byrne J.R.,1977.Lavaca Bay Transgressive Deltaic Sedimentation in Central Texas Estuary,AAPG,61(4):527-545. -
点击查看大图
计量
- 文章访问数: 1066
- HTML全文浏览量: 13
- PDF下载量: 673
- 被引次数: 0
下载:
