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Dawn and dusk of Late Cretaceous basin inversion in central Europe
Solid Earth ( IF 3.2 ) Pub Date : 2021-06-29 , DOI: 10.5194/se-12-1443-2021
Thomas Voigt , Jonas Kley , Silke Voigt

Central and western Europe were affected by a compressional tectonic event in the Late Cretaceous, caused by the convergence of Iberia and Europe. Basement uplifts, inverted graben structures, and newly formed marginal troughs are the main expressions of crustal shortening. Although the maximum activity occurred during a short period of time between 90 and 75 Ma, the exact timing of this event is still unclear. Dating of the start and end of Late Cretaceous basin inversion gives very different results depending on the method applied. On the basis of borehole data, facies, and thickness maps, the timing of basin reorganization was reconstructed for several basins in central Europe. The obtained data point to a synchronous start of basin inversion at 95 Ma (Cenomanian), 5 Myr earlier than commonly assumed. The end of the Late Cretaceous compressional event is difficult to pinpoint in central Europe, because regional uplift and salt migration disturb the signal of shifting marginal troughs. Late Campanian to Paleogene strata deposited unconformably on inverted structures indicate slowly declining uplift rates during the latest Cretaceous. The differentiation of separate Paleogene inversion phases in central Europe does not appear possible at present.

中文翻译:

中欧晚白垩世盆地反转的黎明和黄昏

中欧和西欧在白垩纪晚期受到由伊比利亚和欧洲的会聚引起的挤压构造事件的影响。基底隆起、倒地堑构造和新形成的边缘海槽是地壳缩短的主要表现形式。尽管最大活动发生在 90 到 75 Ma 之间的短时间内,但该事件的确切时间仍不清楚。根据所采用的方法,对晚白垩世盆地反演开始和结束的测年给出了非常不同的结果。根据钻孔数据、相和厚度图,重建了中欧几个盆地的盆地重组时间。获得的数据表明盆地反转在 95 Ma(森诺曼阶)同步开始,比通常假设的时间早 5 Myr。中欧地区晚白垩世挤压事件的结束很难确定,因为区域隆起和盐分迁移干扰了边缘海槽移动的信号。晚坎帕阶至古近纪地层在倒置构造上的不整合沉积表明晚白垩世期间隆升速率缓慢下降。目前似乎不可能区分中欧的古近纪反转阶段。
更新日期:2021-06-29
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