期刊
JOURNAL OF STRUCTURAL GEOLOGY
卷 149, 期 -, 页码 -出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.jsg.2021.104381
关键词
Thrust tectonics; Structural styles; Fold-and-thrust belt; Jura mountains
资金
- Borsa di Perfezionamento Estero
- Andy Whitham CASP Fieldwork Award
The study explored the subsurface structural styles of the Jura fold-and-thrust belt in eastern France by combining geological mapping, cross-section balancing, and 2D-kinematic forward modeling. The results revealed mixed structural styles in the region, with similarities to other fold-and-thrust belts characterized by thick salt-bearing basal detachments and multiple detachment horizons within the sedimentary sequence. The findings can serve as a benchmark for comparing structural styles in similar fold-and-thrust belts.
Fold-and-thrust belts developed above an evaporite de ' collement host structural traps where geofluids, including hydrocarbons, can accumulate. A valid and accurate structural style intepretation is therefore crucial to understand the three-dimensional geometries in the subsurface, in order to better model geofluid reservoirs and to increase success during exploration. Here, we present a multidisciplinary approach to unravel the subsurface structural styles of the Jura fold-and-thrust belt (eastern France), combining geological mapping, from regional to outcrop scale, with cross-section balancing and 2D-kinematic forward modelling. Results show that the Jura fold-and-thrust belt is characterized by mixed structural styles. Evaporite-cored folds are similar to those commonly observed in fold-and-thrust belt characterized by a thick salt-bearing basal detachment (e.g. Zagros fold-and-thrust belt), while fault-bend fold geometries and the emplacement of thrust sheets are similar to those occurring in fold-and-thrust belts characterized by multiple and thin detachment horizons within the sedimentary sequence (i.e. Canadian Rocky Mountains). In the Jura, the flow of evaporites in most cases is inhibited, as anhydrites and salt form thin layers and are mixed with mechanically stronger rocks, such as marls and dolostones. Results from this study can be used as a benchmark to compare structural styles within other fold-andthrust belts characterized by lithological variation within the evaporite-bearing basal detachment at the regional scale and by multiple detachment layers within the sedimentary sequence.
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