Tracking the late Paleozoic to early Mesozoic margin of northern Gondwana in the Hellenides: paleotectonic constraints from U–Pb detrital zircon ages
Tracking the late Paleozoic to early Mesozoic margin of northern Gondwana in the Hellenides: paleotectonic constraints from U–Pb detrital zircon ages
复制标题
追踪古生代晚期到早期中生代冈瓦纳大陆北部希腊边缘：来自 U-Pb 碎屑锆石年龄的古构造约束
DOI：
10.1007/s00531-016-1298-z
复制
发表时间：
2016
影响因子：
2.3
通讯作者：
G. Zulauf
中科院分区：
文献类型：
--
作者：
V. Chatzaras;Wolfgang Doerr;A. Gerdes;J. Krahl;P. Xypolias;G. Zulauf
摘要
我们报告了沿希腊南部高压带千枚岩-石英岩单元 sensu stricto（PQ 单元 s.s.）采样的 9 块石英岩的新碎屑锆石 U-Pb 年龄。碎屑锆石年龄谱主要由两个重要的年龄峰主导，位于约。 600 左右1000 Ma，这是冈瓦纳东部起源的典型值。石炭纪-三叠纪时期锆石的缺失表明沉积环境与瓦里斯坎和早期中生代来源是隔离的。我们的数据支持将 PQ 单元的原岩放置在 s.s. 的古地理配置。古特提斯洋以南和冈瓦纳大陆北部边缘。锆石年龄谱没有显示出相对于 PQ 单位 s.s 内的构造地层位置的显着变化。以及沿高压带的位置。结合新的（本研究）与已发表的碎屑锆石年龄，我们认为 PQ 单元的硅质碎屑变沉积岩 s.s.克里特岛、基西拉岛和伯罗奔尼撒半岛有共同的古地理起源。
Abstract
We report new detrital zircon U–Pb ages of nine quartzites sampled along the Phyllite–Quartzite unit sensu stricto (PQ unit s.s.), in the high-pressure belt of the southern Hellenides. The detrital zircon age spectra are dominated by two significant age peaks at ca. 600 and ca. 1000 Ma, which are typical for an east Gondwana provenance. The absence of zircons of Carboniferous–Triassic ages suggests that the depositional environment was isolated from Variscan and early Mesozoic sources. Our data are in support of paleogeographic configurations placing the protolith of the PQ unit s.s. south of the Paleotethys ocean and along the northern Gondwana margin. The zircon age spectra do not show significant variations with respect to the tectonostratigraphic position within the PQ unit s.s. and the position along the high-pressure belt. Combining the new (this study) with published detrital zircon ages, we suggest that the siliciclastic metasediments of the PQ unit s.s. on Crete, Kythera, and the Peloponnesus have a common paleogeographic origin.
影响因子：
6.1
作者：
O. Zlatkin;D. Avigad;A. Gerdes
通讯作者：
O. Zlatkin;D. Avigad;A. Gerdes