Laser ablation in situ U-Pb dating and its application to diagenesis-porosity evolution of carbonate reservoirs

SHEN Anjiang,HU Anping,CHENG Ting,LIANG Feng,PAN Wenqing,FENG Yuexing,ZHAO Jianxin

Fig. 3. Laser in-situ U-Pb isotopic ages of the dolomite cement filling vugs and surrounding rocks. (a) Surrounding rock age is 592±24 Ma; the sample number is GC-Z2dn2-B3; (b) The age of the concentric ring-edge dolomite cement is 546±7.6 Ma; the sample number is XF-Z2dn2-S5; (c) The age of the radial dolomite cement is 516±10 Ma; the sample number is XF-Z2dn2-S4; (d) The age of the layered light grey-dark dolomite cement is 482±14 Ma; the sample number is XF-Z2dn2-S4; (e) The age of the late medium-coarse crystalline dolomite cement filling vugs is 248±27 Ma; the sample number is GC-Z2dn2-B5;(f) The age of the latest coarse crystalline dolomite cement filling vugs is 115±69 Ma; the sample number is GC-Z2dn2-B3.