微生物碳酸盐岩同生⁃早成岩阶段有机质降解示踪：以四川盆地灯影组四段为例

游杰,胡广,张玺华,沈安江,彭瀚霖,田兴旺,赵东方

Geochemical tracing of organic matter degradation in microbial carbonates during syngenetic⁃early diagenesis: A case study from the Member IV of Dengying Formation,Sichuan Basin

Jie You,Guang Hu,Xihua Zhang,Anjiang Shen,Hanlin Peng,Xingwang Tian,Dongfang Zhao

图6 不同有机质降解阶段微生物碳酸盐岩孔隙发育特征 (a)(b) HJB-K16，有机质处在有氧降解?硝酸盐还原过程，导致岩石中溶蚀孔隙发育，有机质降解产生的孔隙多发育在凝块结构内部，被后期成岩过程中白云石胶结充填；(c) XJZ?K6，有机质的Fe?Mn氧化物还原降解过程导致岩石胶结紧密；(d) XJZ?K10，有机质降解处在硫酸盐还原阶段，孔隙介于有机质降解处在有氧降解?硝酸盐还原阶段和Fe?Mn氧化物还原阶段的样品之间

Fig.6 The Pores in microbial carbonates with different pathways of orgnic matter degradation