The Multiperiod Denudational Subdivision and Constructional Recovery of Late Ordovician in the Akekule Lobe
详细信息
- 责任者：He Jianjun (Chengdu University of Technology ; Chengdu 610059 ; China) ; Li Qiong
- 刊名：Computing Techniques for Geophysical and Geochemical Exploration
- 出版年：2011
- 卷期：33(5)
- 关键词：地壳运动 ; crustal movement
- 页码：p.536-543
- 图表：illus., 14 refs.
- 分类号：0300
- issnNo：ISSN1001-1749
- isbnNo：CN51-1242/P
摘要
The lower palaeozoic strata had suffered many tectonic denudation in the Akekule lobe,the middle Caledonian and early Hercynian tectonic movement play the important role for oil and gas among all the factors.Firstly,by calculating the denudation of the upper Ordovician in early Hercynian tectonic movement by thickness trend method,the results reflect that the denudation occurs in main part of Tahe in the middle Akekule lobe and become thinning to the north and south.It indicates the structural characteristics before early Hercynian was high in the south east and lower in northwest,and became denudation regions in northwest.Based on this results,we got denudation amount of middle Caledonian by the second denudation calculation.It reveals that the denudation occurred in the entire region and had denudation characteristics of strong in the north and weak in the south.So the recovery Paleostructure characteristics is high in the northwest and low in the southeast low before middle Caledonian,which confirmed Akekule lobe had been formed in this time period.The method has important guiding role to recover paleogeographic environment and to evaluate for oil and gas reservoirs.
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