硅质岩的形成环境反映了该陆缘小洋盆在晚侏罗世所处的构造背景。
The sedimentary environment of the chert reflects the tectonic setting of the small oceanic basin in Late Jurassic.
下第三系在构造背景、沉积环境等方面存在很大的差异，相应地划分为上、下两个超压系统。
The tectonic background and sedimentary environment are quite different between Paleogene and Neogene, and overpressure systems can be classified into lower and upper ones correspodently.
本文阐述了该火山洼地形成的历史背景、大地构造环境、形成时地壳运动的特点及与成矿作用的关系。
This paper elucidates the historical setting, the geotecto- hie environment, the features of the crustal movement and their relation to mineralization during the formation of the volcano—tectonic.
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