新特提斯西北部中生代岩石圈演化:岩石成因和地球动力学的视角

IF 2.6 3区 地球科学 Q2 GEOSCIENCES, MULTIDISCIPLINARY
Damir Slovenec, Branimir Šegvić
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引用次数: 0

摘要

克罗地亚北部因塞尔堡的一个复杂而混乱的组合,被认为是一个真正的地质难题,以无处不在的蛇绿岩为标志。这是新特提斯西北段中生代完整岩石圈形成的遗迹,时间跨度从晚安尼西世到晚梯东世。在这篇文章中,我们详细介绍了1991年至2023年收集的msamuange的矿物学、岩石学、地球化学和同位素数据。这些资料包括整个正常蛇绿岩序列,从地幔构造岩和堆积超基性岩,到堆积各向同性辉长岩和片状脉杂岩,再到块状和枕状熔岩,其中有互层放射虫质燧石。我们发现,中生代海洋岩石圈的持续发育表现在7组蛇绿岩地球化学上,每组蛇绿岩代表一个独特的玄武岩-辉长岩套。根据它们的地球化学和同位素特征,重建了一系列的成岩过程和构造岩浆事件。揭示新特提斯西北段中生代演化的地球动力学模型与目前对更广泛的地中海地区的地球动力学认识是一致的。NW新特提斯蛇绿岩与Dinaridic-Albanide-Hellenide带蛇绿岩在构造-岩浆和地球动力学历史上的相似性表明,它们在三叠纪至侏罗纪时期可能是在新特提斯洋的一个分支内共同演化的。专题收藏:这篇文章是蛇绿岩、杂色岩和蓝片岩收藏的一部分,可在https://www.lyellcollection.org/topic/collections/ophiolites-melanges-and-blueschists上找到
本文章由计算机程序翻译,如有差异,请以英文原文为准。
The evolution of the Mesozoic lithosphere of northwestern Neotethys: A petrogenetic and geodynamic perspective
A complex and chaotic assemblage of the north Croatian inselbergs, considered as a real geologic conundrum, is marked by omnipresent ophiolite mélange. This is a vestige of the unbroken formation of the lithosphere in the northwestern segment of Neotethys during the Mesozoic, spanning from the late Anisian to the late Tithonian. In this contribution, we present detailed mineralogical, petrological, geochemical, and isotopic data on the mélange collected from 1991 to 2023. These data include the entire normal ophiolite sequence, from mantle tectonites and cumulate ultramafic rocks through cumulate and isotropic gabbro and sheeted dyke complex to massive and pillow lavas with interbedded radiolarian cherts. We found that the continuous development of oceanic lithosphere during the Mesozoic has been evidenced by seven geochemical groups of ophiolitic rocks, each representing a distinct basalt-gabbro suite. Based on their geochemical and isotopic characteristics, a sequence of petrogenetic processes and tectono-magmatic events has been reconstructed. Proposed geodynamic models which shed light on the Mesozoic evolution of the northwestern segment of Neotethys are consistent with the current geodynamic understanding of the broader Mediterranean region. The similarities in the tectono-magmatic and geodynamic history of NW Neotethyan ophiolites and ophiolites from the Dinaridic-Albanide-Hellenide belts suggest that they evolved together, likely within a single branch of the Neotethys Ocean during Triassic to Jurassic time. 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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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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