1 Faculty of Geo-resources and Information, China University of Petroleum (East China), Dongying257061, Shandong
2 Institute of Resources & Environment, Henan Polytechnic University, Jiaozuo 454000, Henan
3 Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, Guangdong
Abstract Abundant trace fossils Chondrites were found in the Lower Carboniferous Shiguaizi Formation in Shiguaizi section at the toes of the Qimantage Mountains and the Upper Carboniferous Di’aosu Formation near Qinghua iron mine of Wutumeiren area in the south margin of Qaidam Basin. Three ichnospecies were identified: Chondrites fenxiangensis Yang，1984; Chondrites filifalx Volk，1964; Chondrites maqianensis Yang，1988. It is considered that the Early Carboniferous in Shiguaizi area was dominated by syneclise environment and the Upper Carboniferous of Qinghua iron mine was a restricted carbonate platform according to the trace fossils characters and the lithological characteristics as well as other body fossils information. Bioturbated reworking on reservoir, which is an essential influence in the reservoir quality, was also investigated. The investigation has a great reference significance in reconstructing the sedimentary environment and appraising the reservoir quality in the south margin area of Qaidam Basin.
. Discovery of trace fossils Chondrites from the Carboniferous in south margin of Qaidam Basin andits geological significance[J]. JOPC, 2008, 10(5): 529-535.
