摘要
对吐哈盆地生油层的地质特点和地层划分、古气候、古生物组合进行了全面研究；根据三间房组的昆虫性质与特点，建立了“吐哈昆虫组合”，其归属于燕辽昆虫群的区系范围。文中报道了叶肢介１个新种：Ｐｓｅｕｄｏｇｒａｐｔａ？ｔｕｈａｅｎｓｉｓｓ．ｎ．和昆虫３个新种和１个新属：Ｍｅｓｏｂａｅｔｉｓｓａｎｊｉａｎｆａｎｇｅｎｓｉｓｓ．ｎ，Ｍ．ｍａｃｕｌａｔａｓ．ｎ，Ｔｕｈａｎｅｃｔｅｓｘｉｎｊｉａｎｇｅｎｓｉｓｇ．ｓ．ｎ。上述研究结果对石油勘探开发区的地层划分、时代确定及与邻区对比提供了新的依据。
The Tuba Basin is situated in the eastern part of Xinjiang Ufgar Autonomous Region and includes many large and small intermontane basins, its area is about 0. 53 million square kilometres. In this basin there occur widely well-developed continental Jurassic sediments, especially middle Jurassic oil-bearing strata, and yield abundant fossil group. The oil-bearing basin has formed an important oil prospecting and exploring base in western China (Fig. 1). So the Jurassic stratigraphic divisions, sedimentary features, paleoclimate and paleontological assemblages including the conchostracans, insects and plants of the Tuba Basin are studied specially.The Jurassic strata may be subdivided into seven formations as following table (Fig.2 ):Cretaceous or Cenozolc Strata Carboniferous or Permian Strata The paleoclimate and sedimentary features were subdivided into six stages(from old to new): Badaowan, Sangonghe, Xishanyao, Sanjianfang, Qiketai and Qiqu-Kalaza stages.Three new species of fossil insects and one new species of conchostracan- Mesobaetis sanjianjhngensis s. n., M. maculata s. n., Tuhanectes xinjiangensis g. s. n. (Insecta );Pseudograpta? tuhaensis s. n. (Conchostraca) are described and Tuba insect assemblage is established in this paper. All specimens are preserved in Beijing Natural History Museum.
出处
《现代地质》
CAS
CSCD
1995年第4期426-440,T002,共16页
Geoscience
关键词
吐哈盆地
三间房组
油气地质
古生物
地层
uba Basin
Sanjianfang Formation
Tuba insect assemblage
Yanliao insect assemblage
