中国石油大学学报（自然科学版）Issue(3)：8-19,12.DOI:10.3969/j.issn.1673-5005.2015.03.002
四川盆地上震旦统灯影组风化壳古岩溶特征及模式分析
Characteristics and models of weathering paleo-karst in Upper Sinian, Sichuan Basin
摘要
Abstract
The development of ancient weathering crust karst in Sinian is the main factor of the breakthrough in Dengying Formation of Sichuan Basin. With a lot of outcrops, drilling coring, thin sections, seismic and well logging data, geochemis-try analysis, and on the basis of the comprehensive arguments about the two sets of weathering paleo-karst in Dengying For-mation, weathering paleo-karst characteristics and differences between the vertical and horizontal structures were studied to further establish corresponding weathering paleo-karst models. It is concluded that the weathering paleo-karsts in Dengying Formation can be described by the ramp model. However, affected by the different palaeogeomorphology gradient, the strata near the unconformity of the fourth Member of Dengying Formation has the strongest karstification and easy to develop cav-erns, breccia and mudstone filling. The horizone-phreatic zone and deep-slow-flowing zone are the main part of the karst ver-tical zonation. The strata near the unconformity of the second Member of Dengying Formation has a relatively slow karstifica-tion, with the small size of the dolomite breccia, dolomite as its cave fillings, and mainly develop vertical vadose zone, hori-zone-phreatic zone and deep-slow-flowing zone.关键词
风化壳古岩溶/古岩溶结构/古岩溶模式/上震旦统/灯影组/四川盆地Key words
weathering paleo-karst/paleo-karst structure/paleo-karst models/Upper Sinian/Dengying Formation/Sichuan Basin分类
能源科技引用本文复制引用
罗贝维,贾承造,魏国齐,杨威,谢武仁,许海龙..四川盆地上震旦统灯影组风化壳古岩溶特征及模式分析[J].中国石油大学学报（自然科学版）,2015,(3):8-19,12.基金项目
国家科技重大专项(2011ZX05007-002) （2011ZX05007-002）
