Water depth of palaeo-lacustrine basin recovered by dominance diversity of ostracoda: An example from sedimentary period of the Member 3 of Shahejie Formation of Paleogene in Dongying Sag, Shandong Province
Li Shoujun Zheng Deshun Jiang Zaixing Hu Bin Wang Jinxiang Jiao Yehong
1. Geoinformation Science and Engineering College, Shandong University of Science and Technology; Qingdao, 266510 Shandong
2. Shandong Research Center of Engineering & Technology of Petroleum Exploration and Development, Qingdao, 266510 Shandong
3. Institute of Earth Resource and Information, University of Petroleum (East China),
Dongying, 257061 Shandong
4. Department of Energy Geology, China University of Geosciences, Beijing,, 100083
5. Department of Resource and Environment, Jiaozuo Institute of Technology, Jiaozuo, 454100 Henan
From viewpoint of quantitative palaeoecology, the relationship between dominance diversity of ostracoda (Hs) and water depth of palaeo-lacustrine basin (D) is simulated and established using ecology and palaeoecology data. The relationship is proved creditable based on seismic and sedimentary data of the paleogene of Dongying Delta, thus the water depth can be accurately calculated using quantitatively calculated dominance diversity. Taking the sedimentary period of the Member 3 of Shahejie Formation of Paleogene in Dongying Sag as an example, paleo-water depths of the 3 submember sedimentary periods were recovered and the planar isoline map was made. Results show that palaeo-water depth of Dongying Sag are respectively middle submember sedimentary period, lower submember sedimenrary period and upper submember sedimentary period in ascending order. Quantitative recovery of water depth of palaeo-lacustrine basin has an important significance in study of souce-reservoir-caprock of oil and gas in pertroliferous basin.
. Water depth of palaeo-lacustrine basin recovered by dominance diversity of ostracoda: An example from sedimentary period of the Member 3 of Shahejie Formation of Paleogene in Dongying Sag, Shandong Province[J]. JOPC, 2005, 7(3): 399-404.
