周缘盆地(peripheral basin)又称前渊盆地(foredeep basin)。它是由于两个板块的碰撞而在聚合带消减板块上发育起来的沉积盆地。其沉积特征是:早期发育深水相滑塌沉积物和重力流沉积物,晚期发育非海相冲积物。盆地轴向往往与主构造方向一致。
欠补偿周缘前陆盆地发育于陆间造山带的早期阶段。
Underfilled peripheral foreland basins develop in the initial stage of intercontinental orogenic belts.
而且,这种情况在塔里木盆地及周缘地区十分发育的镁铁质岩浆岩中具有广泛的代表性。
And this case is representative among the well-developed mafic magmatic rocks in the Tarim Basin and its peripheral areas.
云南楚雄盆地位于扬子陆块的西南边缘,为一典型的中生代周缘前陆盆地。
The Chuxiong basin in Yunnan on the southwestern margin of the Yangtze landmass is a Mesozoic peripheral foreland basin.
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