中国科学院南京地质古生物研究所机构知识库

采自准噶尔盆地石场剖面小泉沟群和八道湾组的孢粉样品共9件,自上而下编号为:XMS-001,XMS-002,XMS-003,XMS-004,XMS-005,XMS-006,XMS-007,XMS-008和XMS-009。共获孢子花粉75属206种,其中蕨类植物孢子32属91种,裸子植物花粉43属115种,根据孢粉类型及其含量的变化,自下而上分为2套组合:组合1.Calamospora nathorstii-Aratrisporites-Vitreisporites-Disacciatrileti组合(产自编号为:XMS-005,XMS-006,XMS-007,XMS-008和XMS-009的5件样品中);组合2.Densoisporites-Kraeuselisporites-Callialasporites-Disa-cciatrileti组合(产自编号为:XMS-001,XMS-002,XMS-003和XMS-004的4件样品中)。依据组合中一些重要分子的地质时限讨论及其与相关孢粉组合的对比,将组合1的时代归为晚三叠世,组合2的时代归为早侏罗世。

The Shichang section located in the Dongdatang(Dizitemple) Scenic Area, about 70 km south of the Shihezi City. The starting point of the Shichang section is located at the gate of the scenic spot(N43°53′53.94″, E85°40′2.52″). The ended point of Shaichang section at the top of the mountain(N43°53′52.02″, E85°39′55.74″). The Stratigraphic occurrence is 45°∠69°. Nine sporopollen samples were collected from this section, numbered in descending order as XMS-001,XMS-002,XMS-003,XMS-004,XMS-005,XMS-006,XMS-007,XMS-008 and XMS-009.Abundant sporopollen of about 205 species referred 75 genera(including 90 species referred 32 genera of pteridophytic spores, 43 genera and 115 species of gymnosperm pollen) were discovered from the Xiaoquangou group and the Badaowan formations at the Shichang section of the Junggar Basin. Based on the sporopollen contents and characteristics, two assemblages have been proposed in ascending order, as Calamospora nathorstii-Aratrisporites-Vitreisporites-Disacciatrileti assemblage(Assemblage 1), Densoisporites-Kraeuselisporites-Callialasporites-Disacciatrileti assemblage(Assemblage 2). The assemblage 1 is assigned to the Late Triassic, and the assemblage 2 is assigned to the Early Jurassic.