DIAGENESIS OF SHAHEJIE FORMATION OF THE PALAEOGENE IN THE EASTERN CHEZHEN DEPRESSION OF SHANDONG PROVINCE
Li Xiaoli Tian Cheng
1Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing 100029
2Geoscience Department, China University of Geoscience(Beijing), Beijing 100083
The sedimentary system,tectonic features, lithological features and diagenesis of Palaeogene of Shahejie Formation in the eastern Chezhen Depression of Shandong Province are studied in detail. The characteristics of compaction and solution, cementation, secondary porosity during diagenesis processes and the distribution of secondary porosity zone in Chenzhen depression are described. The features of the cementation of carbonate cements and clay minerals indicates that the transition of the clay minerals montmorillonite—illite has evolutionary pattern of obvious gradation and mutation, and that the evolutionary processes experienced montmorillonite zone, gradation zone, rapid transition zone and illite zone. According to the relation of transition from montmorillonite to illite, the diagenesis of Shahejie Formation is divided into the early diagenetic stage (stage A, stage B), and the late diagenetic stage(stage A, stage B, stage C). The dividing indexes of the diagenetic stages are proposed.
About author: Li Xiaoli, born in 1969, is a candidate for Ph.D. degree at the Institute of Geology and Geophysics, Chinese Academy of Sciences.
Cite this article:
. DIAGENESIS OF SHAHEJIE FORMATION OF THE PALAEOGENE IN THE EASTERN CHEZHEN DEPRESSION OF SHANDONG PROVINCE[J]. JOURNAL OF PALAEOGEOGRAPHY, 2002, 4(4): 70-80.
. DIAGENESIS OF SHAHEJIE FORMATION OF THE PALAEOGENE IN THE EASTERN CHEZHEN DEPRESSION OF SHANDONG PROVINCE[J]. JOPC, 2002, 4(4): 70-80.