Excavation of Mummified Tertiary Wood in Canadian Arctic

加拿大北极地区木乃伊第三代木材的挖掘

基本信息

批准号：
03041039
负责人：
SWEDA Tatsuo
金额：
$ 11.52万
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：
1991
资助国家：
日本
起止时间：
1991 至 1992
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-03041039/
关键词：
Canadian Arctic Arehipelago Tertiary Fossil Forest Axel Heiberg Island Ellesmere Island K-T boundary Global Warming エルズミュア島 K-Tバウンダリー地球環境地球温暖化の行く末 KーTバウンダリ-

项目摘要

Allowing only minimal plant growth, the Arctic today is looked under snow-and-ice climate. However, the fossil forests of Axel Heiberg Island found in 1986 by J.F. Basinger, the Canadian representative of present project, and of Ellesmere Island by ourselves in the 1991 preliminary survey tell us that the Arctic was warm and moist as to support lush forest growth in Mesozoic and Tertiary. The fossil forests are literally forests in which live forests were burried and preserved in situ and allow us to reconstruct not only such original stand structure as species composition, special distribution of trees and competition among them etc., but also the general climate and environment of the time.In the 1992 fieldwork, the excavation and reconstruction were carried out at the "Fossil Forest Hill Site" east of Geodetic Hills, Axel Heiberg island, and the "Museum Site" and "New Site" both on Strathcona fiord, Ellesmere Island. In each of the three sites, a score of forest-bearing beddings are exposed in a geological sequence of burial and deposition.The Fossil Forest Hill Site was characterized by undipped layers of bedding and fossil stumps, logs and leaf litters only mummified but not yet silicified, whereas bedding was dipped and tree remains were silicified at the both sites on Ellesmere Island.

如今的北极处于冰雪气候下，只允许最低限度的植物生长。然而，本项目加拿大代表J.F.贝辛格于1986年发现的阿克塞尔·海伯格岛的化石森林和我们在1991年初步调查中发现的埃尔斯米尔岛的化石森林告诉我们，北极温暖湿润，有利于茂密的森林生长。中生代和第三纪。化石森林是字面上的意思，是在原地埋藏并保存了活的森林的森林，它不仅使我们能够重建原始的林分结构，如物种组成、树木的特殊分布和它们之间的竞争等，而且还可以重建原始森林的总体气候和环境。 1992年的实地考察中，对阿克塞尔·海伯格岛大地测量山以东的“化石森林山遗址”以及“博物馆遗址”和“新遗址”进行了发掘和重建。地点”均位于埃尔斯米尔岛斯特拉斯科纳峡湾。在这三个地点中，每一个地点都暴露了数十个森林层理，按照埋藏和沉积的地质顺序。化石森林山遗址的特点是未浸没的层理和化石树桩、原木和落叶仅木乃伊化但尚未形成埃尔斯米尔岛的两个地点的层理均已硅化，而层理被浸入，树木遗骸也被硅化。