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首页> 外文期刊>Arabian journal of geosciences >Petrology of lower-middle Miocene Zoumi Flysch Fm. (Mesorif sub-domain, Rif belt, Morocco): first evidence of mixed mode provenance and geodynamic setting
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Petrology of lower-middle Miocene Zoumi Flysch Fm. (Mesorif sub-domain, Rif belt, Morocco): first evidence of mixed mode provenance and geodynamic setting

机译：中下部内科祖米山山山山山山。 （Mesorif子域，RIF皮带，摩洛哥）：混合模式出处和地球动力学设置的第一个证据

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The Zoumi Basin was generated in a collisional tectonic setting during the Lower-Middle Miocene. The syn-orogenic flysch deposits of the basin have been well investigated by petrographic and geochemical studies to characterize the composition, source to sink routing system, and tectonic setting of the Zoumi flysch. Forty-three sandstone samples and 45 mudstone samples have been gathered from six measured stratigraphic sections. These samples have been analyzed using XRD, XRF, inductively coupled plasma-mass spectrometry (ICP-MS) for mudrocks and petrographic investigation for sandstones. The Lower-Middle Miocene Zoumi flysch is defined as sublitharenites and quartzarenites according to mineralogical content. Detrital grains are commonly subangular to subrounded, poorly sorted, and rich in quartz grains. Point counting modal analysis leads to craton interior and recycled orogen provenance with significant first-cycle sediment supply and low sedimentary recycling. Several chemical ratios (Al2O3/TiO2, La/Th, Cr/Th, Th/Sc, Zr/Sc) as well as chondrite-normalized REE patterns with flat HREE, LREE enrichment, and negative Eu anomaly suggest a dominant felsic rock sources. However, V-Ni-La*4, V-Ni-Th*10, and Th/Sc vs. Cr/Th plots do not exclude a mafic supply source nature which is evidenced by numerous ophiolitic outcrops scattered throughout the Mesorifan Subdomain (Mesorifan Ophiolitic Suture Zone).
机译：Zoumi盆地在下部中部内联的碰撞构造环境中产生。通过岩体和地球化学研究良好地研究了盆地的同步杂液沉积物，以表征组合物，源头到水槽路由系统，以及Zoumi Flysch的构造设置。从六个测量的地层部分收集了四十三个砂岩样品和45个泥岩样品。已经使用XRD，XRF，电感耦合等离子体质谱（ICP-MS）进行了分析了这些样品，用于砂岩的泥虫和岩体调查。下部内部内科祖米氟氏蝇根据矿物质含量定义为含宿霉菌和石英苷。滴乳颗粒通常是亚克地，分类差，富含石英谷物的中间。点计数模态分析导致CRATON内部和再循环造山虫，具有重要的第一循环沉积物供应和低沉积回收。几种化学比例（Al2O3 / TiO2，La / th，Cr / th，Th / Sc，Zr / sc）以及具有平坦HREE，LREE富集和负欧盟异常的Chondrite-归一化的REE模式，提出了一个主要的肠岩体。然而，V-Ni-La * 4，V-Ni-Th * 10和Th / SC与Cr / SC曲线不排除MAFIC供给源性性质，其散落在整个Mesorifan子域（Mesorifan眼极缝合区）。

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