Huizhou Movement and its significance in Pearl River Mouth Basin, China

SHI Hesheng,DU Jiayuan,MEI Lianfu,ZHANG Xiangtao,HAO Shihao,LIU Pei,DENG Peng,ZHANG Qin

Table 1 Statistics of the ratio of pure mudstone thickness in tertiary sequences of Wenchang Formation in main sub-sags of Zhu-1 depression.

Interval Tertiary sequence Ratio of pure mudstone thickness Average ratio of pure mudstone thickness Average ratio of pure mudstone thickness/% Enping-17 sub-sag Enping-12 sub-sag Enping-18 sub-sag Xijiang-33E sub-sag Xijiang-23 sub-sag Upper member of Wenchang Fm. WC-SQ6 0.126 0.103 0.135 0.106 0.102 0.114 40.4 WC-SQ5 0.126 0.138 0.147 0.152 0.136 0.140 WC-SQ4 0.145 0.126 0.161 0.179 0.136 0.150 Lower member of Wenchang Fm. WC-SQ3 0.211 0.199 0.179 0.181 0.224 0.199 59.6 WC-SQ2 0.192 0.202 0.178 0.199 0.196 0.193 WC-SQ1 0.210 0.232 0.201 0.173 0.204 0.204