The Jurassic ophiolitic mélanges in Serbia - a review and new insights

IF 2.6 3区 地球科学 Q2 GEOSCIENCES, MULTIDISCIPLINARY Journal of the Geological Society Pub Date : 2024-01-03 DOI:10.1144/jgs2023-165
N. Djerić, H. Gawlick, M. Sudar
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Abstract

In Serbia ophiolitic mélanges occur widespread below ophiolites. These ophiolites are interpreted to derive from different oceanic domains and are therefore attributed to different tectonic units. We revisited all existing data from matrix ages and blocks in the mélanges, studied the relictic sedimentological features and dated new sections and blocks from various ophiolitic mélanges. On base of these results we can distinguish three different ophiolitic mélanges: 1. Intra-oceanic ophiolitic mélanges (OM1); 2. Ophiolitic mélanges formed during ophiolite obduction with continental blocks (OM2), and 3. Ophiolitic mélanges with fluviatile transported sedimentary rocks or tectonically incorporated much younger blocks at the base (OM3). These three types of ophiolitic mélanges resemble the polyphase history of shortening and ophiolite emplacement on the wider Adria plate of Serbia. All ophiolitic mélanges contain the same Triassic component spectrum of oceanic sedimentary cover rocks and have similar matrix ages. It can be concluded that all different ophiolites/ophiolitic mélanges derive from the same Triassic-Jurassic oceanic domain, the Neotethys Ocean which western part obducted during Middle-Late Jurassic times on wider Adria. Thematic collection: This article is part of the Ophiolites, melanges and blueschists collection available at: https://www.lyellcollection.org/topic/collections/ophiolites-melanges-and-blueschists
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塞尔维亚侏罗纪蛇绿混杂岩--回顾与新见解
在塞尔维亚,蛇绿混杂岩广泛出现在蛇绿岩之下。这些蛇绿岩被解释为来自不同的海洋区域,因此归属于不同的构造单元。我们重新研究了来自混合岩层基质年龄和岩块的所有现有数据,研究了遗迹沉积特征,并对来自不同蛇绿岩混合岩层的新断面和岩块进行了年代测定。根据这些结果,我们可以区分出三种不同的蛇绿混杂岩:1.大洋内部的蛇绿混杂岩(OM1);2. 蛇绿混杂岩与大陆块体在蛇绿混杂岩俯冲过程中形成的混杂岩(OM2);3.在底部有流体搬运沉积岩或构造结合年轻地块的蛇绿混杂岩(OM3)。这三种类型的蛇绿混杂岩与塞尔维亚阿德里亚大板块的缩短和蛇绿岩成岩的多相历史相似。所有蛇绿混杂岩都含有相同的三叠纪海洋沉积覆盖岩成分谱,基质年龄也相似。由此可以得出结论,所有不同的蛇绿混杂岩/蛇绿混杂岩都来自同一个三叠纪-侏罗纪洋域,即新特提斯洋,该洋的西部在中-晚侏罗纪时期被大阿德里亚板块挤压。 专题集:本文是蛇绿岩、熔岩和蓝晶岩资料集的一部分,可在以下网址查阅:https://www.lyellcollection.org/topic/collections/ophiolites-melanges-and-blueschists。
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
Journal of the Geological Society
Journal of the Geological Society 地学-地球科学综合
CiteScore
6.00
自引率
3.70%
发文量
68
审稿时长
6-12 weeks
期刊介绍: Journal of the Geological Society (JGS) is owned and published by the Geological Society of London. JGS publishes topical, high-quality recent research across the full range of Earth Sciences. Papers are interdisciplinary in nature and emphasize the development of an understanding of fundamental geological processes. Broad interest articles that refer to regional studies, but which extend beyond their geographical context are also welcomed. Each year JGS presents the ‘JGS Early Career Award'' for papers published in the journal, which rewards the writing of well-written, exciting papers from early career geologists. The journal publishes research and invited review articles, discussion papers and thematic sets.
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