Abstract:There are five main seismic structural layers in Manite depression.The top structural layer,being shallow,only produces dense reflections at its bottom,there being an angular unconformity interface under it.Bayanhua layer is a cyelothem consisting of 2 zones with dense reflecdons and 2 reflection-free zones,In the east part of the depression,it lies on the underlying layer in an obvious angular unconformity, Badalahu structural layer,overlapping on the next one,produces,no reflection in the upper part and dense reflections in the low part.The pre一Badalahu layer on the bottom of the depression is characterized by chaotic reflections, The basement is reflection-free inside.These structural layers,demarcated by well data,reveal the sedimentary facies dining each depositional stage,and .the contacts between these layers record the following three stages of geological history of the depression, I,During the early ahd mid Jurassic,the depression underwent drastic volcanism so that volcanic sequence was formed, Then in late Jurassi,stable river and lake fades formations were formed,II, The upper Jurassic formation was eroded because of drastic fault-folding in early Cretaceous, and stable river facies and lake facies sediments were deposited on the eroded landform with new depositional center,III, Because of its late subsidence,the different landforms in the south and north parts were unified into a simple depression,thus the Late sedimentary formations were formed.
收稿日期: 1984-01-25
引用本文:
张德林. 马尼特拗陷的地震反射构造层与地质发展历史[J]. 石油地球物理勘探, 1985, 20(6): 605-614,652.
Zhang Delin. The seismic structural layers and the geological history of Manite depression. OGP, 1985, 20(6): 605-614,652.