Tectonic accretion of the Rheno-Hercynian foreland, documented by detrital zircons in the Carboniferous flysch of the Rheinisches Schiefergebirge (Variscides, Germany)

海西造山带南缘活动的泥盆纪碎屑陆架沉积了泥盆纪碎屑陆架沉积，其中的锆石来自加里多尼德和东欧地台。在吐尔奈期至海西期(Hörre，Kellerwald)四元系同造山浊积岩中，尚未发现这些锆石。缺失区段(维新晚期至纳穆尔期B)同造山浊积岩中的锆石激光-电感耦合等离子体质谱测年有望揭示泥盆纪北部碎屑沉积的增生和侵蚀。锆石数据将由潜在源岩的板岩K/Ar定年控制。以前对海西同造山碎屑沉积物矿物组成的研究允许估计再循环陆架沉积的比例。由于前陆盆地的等高线和等厚线是众所周知的，上述发现可以用来平衡再循环沉积物的体积和剖面。必须将该部分添加到劳鲁西亚+阿瓦洛尼亚的被动边缘，以实现更好的眼睑重建。

The active, southern margin of the Rheno-Hercynian Orogen has accreted, at least from the Namurian C onwards, Devonian clastic shelf sediments with zircons derived from the Caledonides and the East European Platform. In Tournaisian to mid-Viséan greywacke turbidites from the Rheno-hercynian allochthons (Hörre, Kellerwald), these zircons are not yet detectable.Laser-ICP-MS dating of zircons from synorogenic turbidites of the missing interval (late Viséan to Namurian B of the autochthon) is expected to reveal the onset of accretion and erosion of north-derived Devonian clastic sediments. Zircon data will be controlled by K/Ar dating of slates from potential source rocks.Previous studies on the mineral composition of Rheno-Hercynian synorogenic clastic sediments permits to estimate the proportion of recycled shelf deposits. Since contours and isopachs of the foreland basin are well-known, the above findings can be used to balance the volume and section of the recycled sediments. That section must be added to the passive margin of Laurussia + Avalonia in order to achieve an improved palispastic reconstruction.