碳酸盐岩台地三级层序界面的讨论

英文篇名：QUANTITATIVE RESEARCH ON SEA LEVEL CHANGE
中文刊名：地球科学
作者：蔡忠贤 ; 贾振远
英文作者：Qin Yujuan (Hangzhou Institute of Petroleum Geology ; Hangzhou310023) Jia Zhenyuan Cai Zhongxian (Department of Petroleum Geology ; China University of Geosciences ; Wuhan430074)
中文关键词：碳酸盐岩台地 ; 层序界面 ; 控制因素 ; 类型 ; 识别标志
英文关键词：sea level change ; decompational correction ; tectonic subsidence ; accommodation space.
出版日期：1997-09-25
机构：中国地质大学研究生院
年：1997
期：05
出版单位：地球科学

摘要

由于碳酸盐岩沉积作用对海平面变化具特有的敏感性及台地类型存在多样性，碳酸盐岩沉积背景下的三级层序界面应在考虑海平面变化阶段、海平面下降幅度和台地暴露程度基础上扩展为四类．其中沉没性质的ＳＢ４常具台地终止性意义，小幅度海平面下降造成的ＳＢ３是台地演化过程中最常见的．这些层序界面可依沉积、地震及叠加的成岩标志加以识别．
The law of sea level change is one of sequence stratigraphical research. The global eustasy is of more significance of correlation than relative sea level change. By means of mathematic calculation and the correction of sediments load, compaction, water depth and water load, the method to obtain tectonic subsidence is applied to work out quantatively R 1 curve, which contains only heat effect, global eustasy and subsidence caused by potential local tectonic events after the correction of compaction, water depth and water load. The least square is used to take off tectonic subsidence caused by heat effect, yielding R 2 curve of eustasy. Then best fit polynomial is used to remove effect of long term sea level fluctuation resulting simply R 3 curve, which can identify change of accommodation space. The Fischer's point map (F.P.) and the corrected F.P. for correlation, have further proved that the subsidence analysis yields better effects when applied in Ordos region.

引文

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