首页> 外文期刊>Tectonophysics: International Journal of Geotectonics and the Geology and Physics of the Interior of the Earth >Evolution of late Neoproterozoic to early Paleozoic tectonic elements in Central and Southeast European Alpine mountain belts: review and synthesis
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Evolution of late Neoproterozoic to early Paleozoic tectonic elements in Central and Southeast European Alpine mountain belts: review and synthesis

机译:中欧和东南高山山区新元古代晚期到古生代早期构造元素的演化:综述与综合

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Late Neoproterozoic to early Paleozoic, Cadomian tectonic elements are widespread in the southeastern Alpine-Mediterranean mountain belts, with discontinuous exposure extending from the Alps to the Menderes Massif in Turkey. The sequences include voluminous plutonic island and continental are successions, some ophiolites of variable, late Neoproterozoic and Cambrian to early Ordovician ages, high- to medium-grade metamorphic sequences and subordinate metasediments. Geological and geochronological data suggest that these Cadomian elements partly experienced tectonothermal activity including metamorphism and magmatism between ca. 650 and 600 Ma, followed by further I- and S-type plutonism in an Andean-type continental margin setting ca. between 570 and 520 Ma. Subsequently, a major rift zone developed which resulted in continental stretching and subsequent formation of a back arc basin which is dated as late Cambrian. Rifting is followed by oceanic spreading which commenced ca. at the Cambrian/Ordovician boundary, possibly in a back-arc setting. This tectonic scenario suggests that Alpine-Mediterranean Cadomian tectonic elements were accreted to Gondwana during early Cadomian events (ca. 600-650 Ma). Subsequently, they were likely part of a long-lasting 'outer' subduction zone of Gondwana at the margin of a Panthalassa-type ocean during late Neoproterozoic III and Cambrian. Due to back-are spreading, continental pieces started to split off from Gondwana ca. at the Cambrian-Ordovician boundary. (C) 2002 Elsevier Science B.V. All rights reserved. [References: 110]
机译:在新元古代晚期到古生代初期,卡多巴构造元素广泛分布在东南部的高山-地中海山脉地带,从阿尔卑斯山一直延伸到土耳其的Menderes地块。层序包括大量的深部岛屿和陆相演替,一些蛇绿岩,新元古代晚期和寒武纪至奥陶纪早期,高中级变质层序和下级变质沉积。地质和年代学资料表明,这些Cadomian元素部分经历了构造热活动,包括ca之间的变质和岩浆作用。 650和600 Ma,然后在安第斯型大陆边缘环境中进一步进行I型和S型岩性作用。 570至520 Ma之间。随后,形成了一个主要的裂谷带,导致大陆伸展并随后形成了一个可追溯至寒武纪晚期的后弧盆地。裂谷之后,开始大洋扩张。在寒武纪/奥陶纪边界,可能在后弧环境中。这种构造情况表明,在早期的卡多马事件(大约600-650 Ma)期间,冈地中海地区沉积了高山-地中海的卡多马构造元素。随后,它们可能是新元古代三世和寒武纪晚期冈萨那长大的“外”俯冲带的一部分,位于潘塔拉萨型海洋边缘。由于偏远地区的蔓延,大陆块开始从冈瓦纳约分裂。在寒武纪-奥陶纪边界。 (C)2002 Elsevier Science B.V.保留所有权利。 [参考:110]

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