In the northwest maginal area of Zhunga’er Basin, the Carboniferous strata are mainly composed of clastic rocks. These rocks were previously thought as shallow sea sediments. The authors studied stresslly on the lower and middle Carboniferous and considered that these rocks belong to turbidite. In addition, the gravity flow and contourite sediments also existed It is the first time to discovere plenty trace fossils in these turbidites. the trace fossils existed in sand-mudstone of upper Lower-Carboniferous are: Zoophycos sp., Chondrites sp., Planolites sp, and Scalarituba sp.. The trace fossils existed in mudstone of Middle Carboniferous are: Scalarituba sp., Cosmorhaphe sp., Helminthopsis sp., Helminthoida sp., Scalarituba sp., Para-scalaritubus sp., Zoophycos sp., and Neonerenes sp. All these fossils can be classified into Eodinichnia traces. By comparison of the khnofacies with Scilachers studies (1967), all ichnofacies mentioned above existed in semi-pelagic to deep-sea environments. According to above analysis, we think that the sedimentary environment of the Northwest margin of the basin in Carboniferous period belong to deep-sea area other than shallow sea area.
Li Juying,Jin Huijuan. THE TRACE FOSSILS DISCOVERY AND IT’S ENVIRONMENT SIGNIFICANCE IN CARBONIFEROUS TURBIDITE SERIES, THE NORTHWEST BORDER OF ZHUNGA’ER BASIN, XINJIANG[J]. Chinese Journal of Geology, 1989, (1): 9-15.