摘要
皖西中、下三叠统为一套碳酸盐岩沉积。从下往上，其沉积环境经历了从盆地－开阔陆棚－开阔台地－局限台地－潮上蒸发台地这样一个海水逐渐变浅、盐度不断增高的环境演化序列．据露头剖面分析，这套碳酸盐岩地层可分成３个层序。层序均由低水位、海进和高水位体系域组成，特征明显。据其岩性特征及准层序的叠置方式，识别出了追赶碳酸盐体系（ｃａｔｃｈｕｐｃａｒｂｏｎａｔｅｓｙｓｔｅｍ）和并进碳酸盐体系（ｋｅｅｐｕｐｃａｒｂｏｎａｔｅｓｙｓｔｅｍ）。
ower-Middle Triassic in western Anhui Province is dominantly composed of carbonate rocks. From its base to top, the sedimentary environments change from basin-shelf -platform-surpratidal evaprite platform, which reflects such a evolution sequence of environments that the relative sea level gradually fall and salinity gradually rise. In terms of sequence stratigraphy,these carbonate deposits may be devided into three sequences.Thefirst sequence at the lower part of the strata is a typeⅠsequence. The second and the third are typeⅡones.And according to the lithologic character and the superimpositionstyles of the parasequences, the catch up and keep up carbonate systems are identified.
出处
《现代地质》
CAS
CSCD
1995年第3期293-299,共7页
Geoscience
