The structure of the western part of the Southern Uplands of Scotland
The structure of the western part of the Southern Uplands of Scotland
复制标题
苏格兰南部高地西部的结构
DOI：
10.1144/gsjgs.150.2.0341
复制
发表时间：
1993
影响因子：
2.7
通讯作者：
D. Needham
中科院分区：
文献类型：
--
作者：
D. Needham
描述并比较了北方带和南方高地中央带两个地区的构造。主要的构造历史是相同的，都显示了一个主要的变形阶段与SE-定向逆冲推覆与相关的褶皱和劈理的形成。这两个地区都表现出较晚的，较小的NW向逆冲与相关的重折叠和crenulation卵裂发展的情况下，中央带。这两个地区也显示出左旋走滑或平移变形的证据，使陡峭的逆冲断层重新活跃。当这些变形的历史进行审查的背景下，地球物理，放射性和生物地层数据从该地区的弧前增生设置为整个南部高地出现的可能性最大。走滑变形内部破坏了增生棱柱，但没有并列原来无关的岩石。志留纪晚期土卫八关闭和随后事件的影响也在南部高地表现出来。
The structures of two areas, one in the Northern Belt and one in the Central Belt of the Southern Uplands are described and compared. The main structural histories are the same, both show a main deformation phase related to SE-directed thrusting with associated fold and cleavage formation. Both areas exhibit late, minor NW-directed thrusting with related refolding and crenulation cleavage development in the case of the Central Belt. Both areas also show evidence of sinistral strike-slip or transpressive deformation which reactivates steepened thrust faults. When these deformation histories are reviewed in the context of geophysical, radiometric and biostratigraphical data from the region a forearc accretionary setting for the whole of the Southern Uplands appears the most likely. The strike-slip deformation has internally disrupted an accretionary prism but has not juxtaposed originally unrelated terranes. The effects of the late Silurian closure of Iapetus and subsequent events are also represented in the Southern Uplands.