期刊
JOURNAL OF STRUCTURAL GEOLOGY
卷 25, 期 6, 页码 867-881出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/S0191-8141(02)00087-1
关键词
analogue modelling; thrust imbricate; decollement; vergence distribution; Aljibe unit
The Miocene Aljibe thrust imbricate (Flysch Trough), in the external zone of the Gibraltar Arc, shows large changes in structural style towards the foreland. Rheological variation of the decollement rocks-Triassic evaporitic rocks and Mesozoic limestones-appears to be the main factor controlling the contrasts in structural style that characterise adjacent wedge domains. In order to test this hypothesis, we carried out analogue experiments involving three-dimensional variations of decollement material. A plate of viscous material was placed in the central part of the models, at the base of the sand multilayers. Different geometries of the viscous plate were used. Experimental results show a strong link between the rheological properties of the decollement material and the structure of the overlying thrust wedge. These results compare well with the internal geometry and vergence distribution in the Aljibe thrust imbricate. Indeed, the tectonic style of the wedge can be explained as a consequence of variations of rock type along the basal decollement. (C) 2002 Elsevier Science Ltd. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据