The influence of low-density granite bodies on extensional basins
The influence of low-density granite bodies on extensional basins
复制标题
低密度花岗岩体对伸展盆地的影响
DOI：
10.1111/gto.12297
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发表时间：
2020
期刊：
影响因子：
--
通讯作者：
Howell L
中科院分区：
文献类型：
--
作者：
Howell L
本宁盆地北方石炭纪仍是“块盆”构造格局的典型地区。人们普遍认为，在构造伸展期间，基底内的大型低密度体允许浮块抵抗均衡沉降。然而，岩石圈尺度的结构和地球动力学模拟实验对此提出了异议;相反，这表明盆内高压的形成发生在岩石圈伸展之前。在英国北方，这种构造框架受构造应力、等密度线和低密度花岗岩浮力、岩石圈挠曲以及重要的继承性构造框架的组合控制。希望通过进一步的研究，能够更好地理解控制“块-盆”格局的构造和地球动力学过程的相互作用。
The Carboniferous northern Pennine Basin remains the type locality for the ‘block and basin’ tectonic framework model. It has been widely believed that during periods of tectonic extension, large low‐density bodies within the basement permit buoyant blocks to resist isostatic subsidence. However, lithosphere‐scale structural and geodynamic modelling experiments dispute this; suggesting instead that the formation of intra‐basinal highs occurs prior to lithospheric extension. In northern UK, this tectonic framework is controlled by a combination of tectonic stress, isostasy and the buoyancy forces of low‐density granite, lithospheric flexure and, importantly, the inherited structural framework. It is hoped that further study can lead to a greater appreciation of the interplay of structural and geodynamic process that control the ‘block and basin’ framework.