中扬子区晚石炭世碳酸盐岩的成岩作用

中扬子区晚石炭世碳酸盐岩的成岩作用主要为白云石化作用、压实一压溶作用、溶解作用，次为重结晶作用、胶结作用，局部有去云化、硅化、去硅化、黄铁矿化、膏化和去膏化．岩溶作用不同程度叠加在各类成岩作用之上，它们可通过成岩组分和组构鉴别；根据成岩组构、氧碳同位素、微量元素含量和成岩组分的阴极发光特征将碳酸盐岩的成岩环境分为海水、大气淡水、混合水和埋藏等成岩环境．各种成岩环境及成岩作用在碳酸盐岩的成岩历史演化过程中相互叠加，构成复杂的成岩作用序列和成岩环境组合．

Diagenesis of Late Carboniferous Carbonate Rocks in the Middle Yarigtze Area

The diagenesis of late carboniferous carbonate rocks in the middle Yangtze area were mainly dolomitization, compaction pressure solution and dissolution, secondly recrystallization,cementation and locally dedolomitization, silification, desilification, pyritization, gypsification and degypsification. The various types of diagenesis were superposed, to different degrees, by karstification which could be identified by diagenetic composition, textures and structures. Based on the composition, textures and structures of diagenetics, oxygen and carbon isotopes, contents of minor elements and cathode luminescence of diagenetic components, the diagenetic environments could be distinguished into marin atmospheric fresh-water mix water and burial environment. During the formation and evolution of carbonate rocks, the superposition of different diagenetic environments and diagenetic types formed complicated diagenetic sequence and environmental association.