论文部分内容阅读
海平面变化规律是层序地层学研究的核心内容之一，全球海平面变化比相对海平面变化更具对比意义．用求构造沉降的方法，结合沉积物负载、压实、水深、水载等校正，通过数学计算定量地求出Ｒ１曲线（经压实、水深和水载荷校正，只含热影响，全球海平面变化及潜在的局部构造事件等因素引起的沉降）．用最小二乘法去除热引起的构造沉降，获Ｒ２海平面变化曲线，近似地反映了全球海平面变化．再经最佳多项式拟合，去掉长期波动的海平面变化效应，获Ｒ３曲线，可识别三级层序可容空间的变化．为了比较，绘制Ｆｉｓｃｈｅｒ点图（略称Ｆ．Ｐ．）及校正的Ｆ．Ｐ．（Ｆ．Ｐ．′）等曲线．进一步证明，沉降分析法在鄂尔多斯盆地南缘寒武纪应用效果良好．
The variation of sea level is one of the core contents of the study of sequence stratigraphy. The change of global sea level is more significant than the change of relative sea level. With the method of structural settlement, combined with sediment load, compaction, water depth, water load and other corrections, the R1 curve was quantitatively calculated by mathematical calculation (compaction, water depth and water load correction, only thermal effects, global sea level Changes and potential subsidence caused by structural events such as subsidence). Least square method to remove heat-induced structural subsidence, by R2 sea level curve, approximately reflects the global sea level changes. After the best polynomial fitting, the long-term fluctuation sea level change effect is removed and the R3 curve is obtained, which can identify the change of the three-level sequence allowable space. For comparison, draw the Fischer dot plot (abbreviated F.P.) and the corrected F. P. (F.P. ’) and other curves. Further proof, settlement analysis method in the southern edge of the Ordos Basin Cambrian application effect is good.