Cretaceous transformation from passive to active continental margin in the Western Carpathians as indicated by the sedimentary record in the Infratatric unit
Cretaceous transformation from passive to active continental margin in the Western Carpathians as indicated by the sedimentary record in the Infratatric unit
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DOI：
10.1007/s00531-007-0199-6
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发表时间：
2008-07
影响因子：
2.3
通讯作者：
M. Putiš;H. Gawlick;W. Frisch;Marián Sulák
中科院分区：
文献类型：
--
作者：
M. Putiš;H. Gawlick;W. Frisch;Marián Sulák
西喀尔巴阡山脉的白垩纪造山带由被破坏的中喀尔巴阡山脉北部区域的碎片组成，被定义为下层单元，并在侏罗纪和白垩纪时期形成了面向本宁洋的大陆边缘。本宁洋的破裂和张开发生在早侏罗世（普林斯巴赫阶），记录了下层沉积序列中从浅水沉积物到深水结核状灰岩的突然加深事件。桑顿纪时期，由于平宁洋地壳开始俯冲，被动大陆边缘转变为主动大陆边缘，这反映在贝利斯下域复理石沉积的开始，该域在汇聚边缘环境中占据了弧前盆地的位置。弧前盆地由来自下层单元更内部的碎屑物质供给，该单元在白垩纪晚期经历了推覆堆积、变质作用和随后的折返作用。在马斯特里赫特时代，弧前盆地的前部形成了一个增生楔，形成了弧外脊并将碎屑物质输送到弧前盆地中。欧洲板块和亚得里亚海板块之间的最终碰撞发生在始新世时期，是造成下层单元弱变质作用的原因。
The Cretaceous orogen of the Western Carpathians comprises fragments of the destructed northern Centrocarpathian domain, which is defined as Infratatric unit and formed a continental margin facing the Penninic Ocean in Jurassic and Cretaceous times. The breakup event and opening of the Penninic Ocean occurred in the Early Jurassic (Pliensbachian), which is recorded by an abrupt deepening event from shallow-water sediments to deep-water nodular limestone in the Infratatric sediment succession. The transformation of the passive into an active continental margin by the onset of subduction of the Penninic oceanic crust occurred in Santonian times and is reflected by the beginning of flysch deposition in the Infratatric Belice domain, which took the position of a forearc basin in the convergent margin setting. The forearc basin was supplied by clastic material from the more internal part of the Infratatric unit, which experienced nappe stacking, metamorphism, and subsequent exhumation in Late Cretaceous times. In the frontal part of the forearc basin an accretionary wedge was built up, which formed an outer-arc ridge and delivered detrital material into the forearc basin in Maastrichtian time. Final collision between the European and the Adriatic plate occurred in the Eocene period and is responsible for weak metamorphism in the Infratatric unit.