Inversion tectonics of the Variscan foreland of the British Isles
Inversion tectonics of the Variscan foreland of the British Isles
复制标题
不列颠群岛瓦里斯坎前陆的反转构造
DOI：
10.1144/gsjgs.153.1.0017
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发表时间：
1996
影响因子：
2.7
通讯作者：
B. Besly
中科院分区：
文献类型：
--
作者：
S. Corfield;R. Gawthorpe;M. Gage;A. J. Fraser;B. Besly
瓦里斯坎前陆的晚威斯特伐利亚反转结构显示出巨大的方向变化，这是底层基底颗粒的产物。主要基底构造相对于最大缩短方向的方向也决定了反转盆地变形的严重程度。 NE-SW 走向的断层大致垂直于 NW-SE 至 NNW-SSE 最大缩短方向，该方向是根据瓦里斯造山带南部的逆冲输送方向确定的。因此，瓦里西亚前陆的 NE-SW 走向盆地发生强烈反转，西里西亚裂谷后充填物通常被从盆地中排出，同裂谷沉积物因 V 形褶皱而变形（都柏林盆地和鲍兰盆地）。相比之下，N-S-和NW-SE向的断层更倾斜于最大缩短的方向，因此，显示出倾斜滑动的重要组成部分。这种斜滑成分表现为阶梯状的周壁和花状结构。总体而言，N-S-和NW-SE向盆地反转不太强烈，西里西亚裂谷后充填得以保留。
Late Westphalian inversion structures on the Variscan foreland display wide variations in orientation that are the product of the underlying basement grain. The orientation of the major basement lineaments in relation to the direction of maximum shortening also determined the severity of deformation of the inverted basins. NE–SW-trending faults were oriented roughly perpendicular to the NW–SE to NNW–SSE direction of maximum shortening determined from thrust transport directions in the Variscan orogen to the south. As a consequence, NE–SW-trending basins in the Variscan foreland have been strongly inverted, the Silesian post-rift fill has commonly been expelled from the basins and the syn-rift sediments have been deformed by chevron folds (Dublin and Bowland Basins). In contrast, the N–S- and NW–SE-trending faults were oriented more obliquely to the direction of maximum shortening and, as a consequence, display a significant component of oblique slip. This oblique slip component is manifested as en-echelon periclines and flower structures. In general, the N–S- and NW–SE-trending basins were less strongly inverted and the Silesian post-rift fill has been retained.