| 张掖国家地质公园白垩系下沟组叶肢介化石的发现及古生态与古环境 |
| 点此下载全文 |
| 引用本文：仲新,孙新春,辜平阳,李小强,刘莎,刘晔.2020.张掖国家地质公园白垩系下沟组叶肢介化石的发现及古生态与古环境[J].地球学报,41(4):543-553. |
| DOI：10.3975/cagsb.2020.051001 |
| 摘要点击次数: 1756 |
| 全文下载次数: 1265 |
|
| 基金项目:甘肃省地质勘查基金项目“甘肃省特殊景观区典型地质剖面综合调查研究”(编号: 2018-143) |
|
| 中文摘要:张掖国家地质公园红山湾白垩纪单型盆地是张掖—民乐盆地的重要组成部分, 长期缺乏可靠的生物地层和古生态与古环境研究。本文首次报道了该区下白垩统下沟组叶肢介化石, 包括1个种和3个未定种: Eosestheria ovate、E.sp.。结合首次发现的大古植物化石Claophlebis、Podozamites、微古植物化石和前人同位素测年结果, 认为地质公园红山湾一带成景地层属于Aptian阶, 应为Aptian中晚期。通过对叶肢介个体8个特征参数进行测量, 运用PAST软件进行常规统计分析与多元统计分析, 按照生态系统, 结合发现的大古、微古植物化石, 将早白垩世红山湾盆地划分为陆地水生和陆生生态系统, 对沉积盆地古生态与古环境进行了恢复与重建。 |
| 中文关键词:张掖国家地质公园 红山湾层 叶肢介化石 古生态分析 |
| |
| Discovery and Paleoecological and Paleoenvironmental Environment of the Conchostracans from the Cretaceous Xiagou Formation in Zhangye National Geopark |
|
|
| Abstract:The Cretaceous monotype basin in Hongshanwan area of Zhangye National Geopark is an important part of Zhangye–Mingle basin. In this paper, the Early Cretaceous Xiagou conchostracans fossils were reported for the first time, which included 1 species and 3 undetermined species: Eosestheria ovate, E.sp. Combined with the fossils of Cladophlebis, Podozamites and previous isotopic dating results, it is believed that the deposits in Hongshanwan area of the geopark belong to Aptian Stage and should be in the middle and late Aptian period. Through the measurement of individual 8 characteristic parameters of the leaf segments, by using the PAST software for general statistical analysis and multivariate statistical analysis, according to the ecological system, and in combination with micro-plant fossils found in the field, the authors divided the early Cretaceous red valley basin into aquatic system and land ecosystem, thus making restoration and reconstruction of the paleoenvironment and paleoecology of the sedimentary basin. |
| keywords:Zhangye National Geopark Hongshan Bed Conchostracans fossils analysis of paleoecological environment |
| 查看全文 查看/发表评论 下载PDF阅读器 |
|
|
|
|
|
