Upper Palaeozoic basins of the British Isles—Caledonide inheritance versus Hercynian plate margin processes
Upper Palaeozoic basins of the British Isles—Caledonide inheritance versus Hercynian plate margin processes
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不列颠群岛上古生代盆地——喀里多尼德继承与海西板块边缘过程
DOI：
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发表时间：
1982
影响因子：
2.7
通讯作者：
M. Leeder
中科院分区：
文献类型：
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作者：
M. Leeder
提出了解释上古生界沉积盆地成因和位置的假说。A类盆地为古红砂岩盆地，其位置和沉降受加里多尼德特征控制，包括活动和残留的弧前盆地(米德兰河谷)和主要的横流盆地(奥卡迪亚盆地)。南高地俯冲杂岩中较新的花岗岩深成岩浆形成于俯冲作用之后，是碰撞后克拉通作用的结果，至今鲜为人知。B类盆地在空间上的初始位置受古板块因素控制，特别是花岗岩类深成岩体的位置，但其沉降受活动的海西(新板块)过程控制。一些A类盆地通过这一过程再生(米德兰河谷)。提出了一种新的假说，解释了石炭纪裂陷-凹陷趋势的起源，这一趋势类似于北海等现代大陆边缘盆地所证实的趋势。这一假说是对麦肯齐的岩石圈伸展模型的修正，该模型的一些主要特征在不列颠群岛北部和中部的石炭纪历史中得到了很好的展示。B组过程受S布列塔尼-中孚日地区利古里亚/布雷顿板块消耗的控制。海西带C组盆地的位置和成因也归因于弧后裂谷作用和里格罗-布雷顿俯冲引起的大陆地壳‘海洋化’过程。
Hypotheses to explain the origin and location of Upper Palaeozoic sedimentary basins are presented. Group A basins were those Old Red Sandstone basins whose location and subsidence were controlled by Caledonide features, including active and remnant fore-arc basins (Midland Valley) and major transcurrent movements (Orcadian basin). Newer Granite plutonic magmas in the Southern Uplands subduction complex post-dated subduction and resulted from post-collision cratonization processes as yet little understood. Group B basins were those whose initial positions in space were controlled by palaeo-plate factors, in particular the location of granitoid plutons, but whose subsidence was controlled by active Hercynian (neoplate) processes. Some Group A basins were regenerated by this process (Midland Valley). A new hypothesis is presented to account for the origin of a Carboniferous rift-to-sag trend similar to that proven in modern continental margin basins such as the North Sea. The hypothesis is an adaptation of McKenzie's lithospheric stretching model, some of whose major features are well shown in the Carboniferous history of the north and central British Isles. Group B processes were controlled by Ligurian/Bretonic plate consumption in the S Brittany–Massif Central–Vosges areas. Group C basins in the Rheno-Hercynian zone also owe their location and origin to back-arc rifting and continental crustal ‘oceanization’ processes caused by Liguro-Bretonic subduction.