西藏南部堆纳地区上白垩统及下第三系遗迹化石及其环境意义(英文)

UPPER CRETACEOUS AND LOWER TERTIARY TRACE FOSSILS FROM TNA AREA OF SOUTHERN TIBET AND THEIR ENVIRONMENTAL SIGNIFICANCE

描述我国西藏南部堆纳地区宗山组下部及基堵拉组中的遗迹化石。宗山组中的遗迹化石组合可归属于Zoophycos遗迹相 ,该遗迹相可进一步划分成产于富氧条件下的Thalassinoides Planolites遗迹亚相及产于贫氧条件下Zoophycos Chondrites遗迹亚相。基堵拉组中的遗迹化石组合可归属于在高能的潮下带的临滨和潮间带的前滨环境下产生的Skolithos遗迹相。

This paper describes trace fossils from the lower part of the Zongshan Formation and Jidula Formation, Tüna area of Southern Tibet, China. The trace fossil assemblage of the Zongshan Formation is referred to the Zoophycos ichnofacies which can further be divided into the Thalassinoides Planolites subichnofacies and the Zoophycos Chondrites subichnofacies. The former was produced under aerobic conditions and the latter under dysaerobic conditions. The trace fossil assemblage of the Jidula Formation is referred to the Skolithos ichnofacies formed in high energy subtidal shoreface and intertidal foreshore environments.