Superposition of burial and hydrothermal events: post‐Variscan thermal evolution of the Erzgebirge, Germany
Superposition of burial and hydrothermal events: post‐Variscan thermal evolution of the Erzgebirge, Germany
复制标题
埋藏和热液事件的叠加：德国厄尔士山脉的后瓦里斯坎热演化
DOI：
10.1111/ter.12159
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发表时间：
2015
期刊：
影响因子：
2.4
通讯作者：
T. von Eynatten
中科院分区：
文献类型：
--
作者：
T. von Eynatten
Erzgebirge（德国）的后Variscan热史是沉积埋藏、挖掘和叠合热液活动的结果。利用锆石、磷灰石(U-Th)/He和磷灰石裂变径迹热年代学分析了热套印的时间和程度。现今的额尔齐布尔格地表是在瓦里斯坎造山运动后被挖掘到近地表位置的。热模拟显示，二叠纪-中生代的埋藏温度高达80-100℃，尽管沉积覆盖层向北变薄，导致最高埋藏温度低于40℃。白垩纪热液活动使锆石(U-Th)/He温标沿矿脉重设，局部改变了这种热模式。热模式显示新生代没有明显的区域性发掘，表明基底的准平原样形态是晚白垩世的特征。
The post‐Variscan thermal history of the Erzgebirge (Germany) is the result of periods of sedimentary burial, exhumation and superimposed hydrothermal activity. The timing and degree of thermal overprint have been analysed by zircon and apatite (U–Th)/He and apatite fission track thermochronology. The present‐day surface of the Erzgebirge was exhumed to a near‐surface position after the Variscan orogeny. Thermal modelling reveals Permo‐Mesozoic burial to temperatures of up to 80–100 °C, although the sedimentary cover thins out towards the north resulting in maximum burial temperatures of less than 40 °C. This thermal pattern was locally modified by Cretaceous hydrothermal activity that reset the zircon (U–Th)/He thermochronometer along ore veins. The thermal models show no significant regional exhumation during Cenozoic times, indicating that the peneplain‐like morphology of the basement is a Late Cretaceous feature.