The Accommodation Transition in Faulted Lake Basin

Key words: 
• accommodation transition /
• tectonic subsiding /
• sediment supply /
• water body /
• faulted lake basin /
• Dongying Depression /

Abstract: The faulted basin has the characteristics of the extensive influence of tectonic subsiding, the abundant and unbalanced sediment supply, limited water area and multimaterial sources. Those lead to the difference between the marine basin and the faulted lake basin. The style of the parasequence sets differs with the position in the faulted lake. In some period, the change of the relative lake level has difference in the different place. At the lake marginal area, the accommodation becomes less and, in the mid part, the accommodation becomes larger, between those areas, there is an accommodation transition zone. The accommodation transition is predominated by the tectonic subsiding, sediment supply and water body. Tectonic subsiding and sediment supplying make the redistribution of the water body and the change of the relative lake level with the same water volume. Only under the situation of the water volume changing, the relative lake level has the accordant changing.