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Compilation of Results from Excavation of Tertiary Fossil Forests of the Canadian Arctic Archipelago

加拿大北极群岛第三纪化石森林发掘结果汇编

基本信息

批准号：
06041052
负责人：
SWEDA Tatsuo
金额：
$ 3.26万
依托单位：
Nagoya University
依托单位国家：
日本
项目类别：
Grant-in-Aid for international Scientific Research
财政年份：
1994
资助国家：
日本
起止时间：
1994 至无数据
项目状态：
已结题

项目摘要

Palaeobotanical, palaeoclimatic and palaeoenvironmental data and findings resulting from the 1991-1992 field research in Axl Heiberg Island and Ellesmere Island, Canadian Arctic Archipelago and supported by the Ministry of Education, Science and Culture Grant-in-Aid for International Scientific Research program were compiled in a report.The collection from the field work and compiled and analyzed in the present work include materials primarily consisting of fossil plants, geological and geographical data consisting of stratigraphy and topographic surveying and such biological data as measurements of stump size, location etc. First of all in this work, such micro fossils as leaves and corns as well as such mega fossils as tree trunks and stumps were identified to reconstruct species composition of the fossil forests. Secondly, the biological data were analyzed and compiled into such forest stand characteristics as stem density, tree size distribution, stand biomass etc., which make a comparison of the fossils forests with the present-day counterpart possible, which in turn lead to palaeoclimatic inferences. Lastly the results from the topographic surveying were compiled into several maps with geological interpretation. These results in three differentcategories were further integrated into the reconstruction of the warm and moist palaeoclimate of Tertiary and the sedimental environment of the time in which these fossil forests grew, buried and preserved. The most significant results from this work was that these fossil forests provide superb natural analogue to the impending global warming in which the globe would be as warm as Tertiary.

在加拿大教育、科学和文化部国际科学研究资助项目的支持下，1991-1992年在加拿大北极群岛的Axl Heiberg岛和Ellesmere岛进行的古植物学、古气候和古环境资料和研究结果汇编成一份报告。本工作收集整理和分析的野外工作资料包括主要由植物化石组成的材料、由地层学和地形测量组成的地质和地理资料以及诸如残桩大小和位置测量等生物学资料。本工作首先对树叶、玉米等微观化石和树干、树桩等大型化石进行了鉴定，重建了化石林的物种组成。其次，对生物数据进行分析和整理，形成林分特征，如树干密度、树木大小分布、林分生物量等，使化石林分与现代林分的对比成为可能，从而得出古气候推断。最后，将地形测量结果编制成若干图，并进行地质解释。这三种不同类型的结果被进一步整合到第三纪温暖湿润的古气候和化石森林生长、埋藏和保存时期的沉积环境的重建中。这项工作最重要的结果是，这些化石森林为即将到来的全球变暖提供了极好的自然模拟，届时全球将像第三纪那样温暖。