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首页> 外文期刊>Facies >Lower Jurassic Bahamian-type facies in the Choc Nappe (Tatra Mts, West Carpathians, Poland) influenced by paleocirculation in the Western Tethys
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Lower Jurassic Bahamian-type facies in the Choc Nappe (Tatra Mts, West Carpathians, Poland) influenced by paleocirculation in the Western Tethys

机译：在Choc Nappe（Tatra Mts，West Carpathians，Poland）中，低侏罗纪Bahamian型相距受到西方特质古委员会的影响

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摘要

The Lower Jurassic (upper Sinemurian) of the Hronicum domain (Tatra Mts., Western Carpathians, Poland) represents typical tropical shallow-water carbonates of the Bahamian-type. Eight microfacies recognized include oolitic-peloidal grainstone/packstone, peloidal-bioclastic grainstone, peloidal-lithoclastic-bioclastic-cortoidal grainstone/packstone, peloidal-bioclastic packstone/grainstone, peloidal-bioclastic wackestone, spiculitic wackestone, recrystallized peloidal-oolitic grainstone and subordinate dolosparites. The studied sediments were deposited on a shallow-water carbonate platform characterized by normal salinity, in high-energy oolite shoals, bars, back-margin, protected shallow lagoon and subordinately on restricted tidal flat. Some of them contain the microcoprolite Parafavreina, green alga Palaeodasycladus cf. mediterraneous (Pia) and Cayeuxia, typical of the Early Jurassic carbonate platforms of the Western Tethys. The spiculite wackestone from the upper part of the studied succession was deposited in a transitional to deeper-water setting. The studied upper Sinemurian carbonates of the Hronicum domain reveal microfacies similar to the other Bahamian-type platform carbonates of the Mediterranean region. Thereby, they record the northern range of the Lower Jurassic tropical shallow-water carbonates in the western part of the Tethys, albeit the thickness of the Bahamian-type carbonate successions generally decrease in a northerly direction. The sedimentation of the Bahamian-type deposits in the Hronicum domain, located during the Early Jurassic at about 28 degrees N, besides other specific factors (i.e., light, salinity, and nutrients) was strongly controlled by the paleocirculation of warm ocean currents in the Western Tethys.
机译：Hronicum结构域的下侏罗纪（上蓬蓬莲）（Tatra MTS，西喀尔巴阡山脉，波兰）代表了巴哈斗式的典型热带浅水碳酸盐。识别八微型微量胶质岩，包括鲕粒素晶石/包装石，Peloidal-Bioclastic造粒石，PeloIdal-Lithoclastic-Bioclastic-Cortoidal晶体/包装石，Peloctal-Bioclastic Packstone / Grainstone，Peloider-Bioclastic Wackestone，Spiculitic Wackestone，重结晶的Peloidal-Oolitic Grablestone和下属Dolosparites 。将研究的沉积物沉积在一个以正常盐度为特征的浅水碳酸盐平台上沉积在高能量的鲕粒浅滩，酒吧，后缘，保护的浅泻湖中，并在限制潮气平面上。其中一些含有微锁岩ParaPavreina，绿藻帕拉诺·苏斯盐酵母CF。地中的（PIA）和Cayuxia，典型的西部Thethys的早期侏罗纪碳酸盐平台。从研究的继任的上部的纺织石瓦氏饼干被沉积在过渡到更深的水环境中。研究了阶下的躯体碳酸亚颗粒碳酸盐域，揭示了类似地中海地区的其他巴哈马型平台碳酸酯的微腐植物。由此，它们记录了在特提什西部的侏罗纪热带浅水碳酸盐中的北方范围，尽管巴哈马型碳酸酯型的厚度通常在北方方向上降低。在侏罗纪中，在早期侏罗纪在约28℃下，除其他特定因素（即光，盐度和营养素）的沉淀，沉降在侏罗腊肠中，通过温暖的欧洲电流的古静脉强烈控制西部的特质。

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