Review of the Ediacaran-Lower Ordovician (pre-Sardic) stratigraphic framework of the Eastern Pyrenees, southwestern Europe

IF 1.3 4区 地球科学 Q2 GEOLOGY
M. Padel, S. Clausen, J. Álvaro, Josep María Casas Tuset
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引用次数: 17

Abstract

The Ediacaran-Lower Ordovician successions exposed in the Eastern Pyrenees are updated and revised based on recent U-Pb zircon radiometric ages, intertonguing relationships of carbonate-dominated strata, and onlapping patterns marking the top of volcano-sedimentary complexes. A stratigraphic comparison with neighbouring pre-Variscan outcrops from the Montagne Noire (southern French Massif Central) and Sardinia is related to i) the absence of Cadomian deformation close to the Ediacaran-Cambrian boundary interval; ii) the presence of an episodic, Cadomian-related, acidic-dominant volcanism related to carbonate production punctuating the Ediacaran-Cambrian transition, similar to that recorded in the northern Montagne Noire; and iii) the lack of Guzhangian (Late Cambrian Epoch 3) regressive shoal complexes present in the Montagne Noire and probably in Sardinia.
欧洲西南部比利牛斯山东部埃迪卡拉-下奥陶统(前萨丁纪)地层格架评述
根据最近的U-Pb锆石辐射年龄、碳酸盐岩为主的地层的相互关系以及标志火山-沉积杂岩顶部的重叠模式,对东比利牛斯山脉中暴露的埃迪卡拉-下奥陶统序列进行了更新和修正。与蒙塔涅-诺伊尔(法国中部南部地块)和撒丁岛邻近的华力西期前露头的地层比较与i)在埃迪卡拉-寒武纪边界层附近没有卡多米亚变形有关;ii)与埃迪卡拉纪-寒武纪过渡期碳酸盐岩生产有关的幕式、与卡多米亚纪有关的酸性主导火山活动的存在,类似于在北部的诺伊山记录的火山活动;以及iii)在诺伊尔山和撒丁岛可能缺乏古章阶(晚寒武纪3)退积浅滩杂岩。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
Geologica Acta
Geologica Acta 地学-地质学
CiteScore
2.50
自引率
6.70%
发文量
13
审稿时长
>12 weeks
期刊介绍: - Relevant conceptual developments in any area of the Earth Sciences. - Studies presenting regional synthesis. - Thematic issues or monographic volumes presenting the results from one or more research groups. - Short papers reflecting interesting results or works in progress. - Contributions and results from Research Projects, Workshops, Symposiums, Congresses and any relevant scientific activity related to Earth Sciences. - Geologica Acta aims to stimulate rapid diffusion of results and efficient exchange of ideas between the widespread communities of Earth Science researchers (with special emphasis on Latinamerica, the Caribbean, Europe, the Mediterranean
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