盘星藻在湖泊沉积中的成矿作用   总被引：1，自引：0，他引：1  

曾昭琪  钱峰 《湖泊科学》2000,12(4):304-310

常被作为淡水湖泊沉积相的指标植物－盘星藻（Ｐｅｄｉａｓｔｒｕｍ ｓｐｐ．）亚化石,在许多国家均有发现,我国新生代油田的芯中亦有较多的盘星藻化石的记载（包括江苏、湖北、河北、西北和东北等地）。本文报告了盘星藻在湖泊中沉积成矿的探索性研究,证明盘星藻等浮游藻类在成矿或成油的过程中有一定的贡献。  相似文献   

海南岛近2500a来盘星藻记录的周期性气候变化   总被引：9，自引：2，他引：9  

张华  郑卓  王建华  王斌  邓韫  邹和平 《热带地理》2004,24(2):109-112,122,F003

湖泊沉积物中盘星藻含量变化可以反映湖泊水环境特征，对海南岛双池玛珥湖沉积物中盘星藻的研究发现，热带湖泊盘星藻种类以浮游类单角盘星藻为主，其含量在最近2500a以来相当丰富，而且其数量浓度的变化与湖水深度关系密切。频谱分析结果表明，近两千多年来盘星藻含量存在一个主要周期和一个次要周期，分别为421a和218a，前者与湛江湖光岩的结果可以对比，而后者则与206a的宇宙核素周期(^14C和^10Pe)十分接近。  相似文献   

A Miocene algal assemblage dominated by Pediastrum leonensis n. sp. (Chlorophyceae) from Patagonia, Argentina: paleoenvironmental implications     

Guillermo Tell  María del C. Zamaloa 《Journal of Paleolimnology》2004,32(3):247-254

Taxonomic identification of Pediastrum species in an Early Miocene assemblage from southeast Patagonia, Argentina, is used to assess paleoecological conditions. Pediastrum leonensis n. sp. is described based on unique features of the coenobia morphology. It belongs to the P. kawraiskyi–mustersii–patagonicum complex and has no known living counterpart. This group seems to have a long evolutionary history in the region. P. kawraiskyi and P. mustersii are recorded for the first time in pre-Quaternary deposits and their presence suggests a depositional environment represented by a cold stenothermal lake conditions, indicating a temperate to a cold-temperate climate.  相似文献