The Variscan orogeny in Chios (Greece): Carboniferous accretion along a Palaeotethyan active margin
The Variscan orogeny in Chios (Greece): Carboniferous accretion along a Palaeotethyan active margin
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希俄斯（希腊）的瓦里斯坎造山运动：沿古特提斯活动边缘的石炭纪增生
DOI：
10.1046/j.1365-3121.2003.00483.x
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发表时间：
2003
期刊：
影响因子：
2.4
通讯作者：
M. Gaetani
中科院分区：
文献类型：
--
作者：
A. Zanchi;E. Garzanti;C. Larghi;L. Angiolini;M. Gaetani
摘要关于Chios(Volissos Turidites)浊积序列的新的地层和构造资料表明，该碎屑楔形成于早石炭世。这些浊积岩是由瓦里斯坎造山带的侵蚀作用远距离提供的，很可能是在古特提斯残馀洋盆中沉积的。在古生代闭合前的安山变质条件下，它们发生了严重的变形和构造增厚。收缩和层间平行的伸展构造、高应变率和沿厚剪切带破碎的基质组构都可能表明在增生楔形体的脚趾处发生了变形。地层学、岩石学和构造数据表明，Chios代表了古特提斯的最西端，它避开了冈瓦那和劳拉西亚之间的石炭纪碰撞，但从瓦里斯坎带获得了大量陆源沉积物，有利于大型增量棱柱的生长。
ABSTRACT New stratigraphic and structural data on the turbiditic succession of Chios (Volissos turbidites) suggest that this clastic wedge formed during the Early Carboniferous. These turbidites, fed long‐distance by erosion of the Variscan orogen, were most likely deposited in a Palaeotethyan remnant‐ocean basin. They were severely deformed and structurally thickened at anchi‐metamorphic conditions before the close of the Palaeozoic. Both contractional and layer‐parallel extensional structures, high strain rates, and broken‐in‐matrix fabrics along thick shear zones may suggest deformation at the toe of an accretionary wedge. Stratigraphic, petrographic and structural data indicate that Chios represents the westernmost part of Palaeotethys which escaped the Carboniferous collision between Gondwana and Laurasia, but received great volumes of terrigenous sediments from the Variscan belt, favouring the growth of a large accretionary prism.