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首页> 外文期刊>Facies >Facies mosaic in the inner areas of a shallow carbonate ramp (Upper Jurassic, Higueruelas Fm, NE Spain)
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Facies mosaic in the inner areas of a shallow carbonate ramp (Upper Jurassic, Higueruelas Fm, NE Spain)

机译：面部马赛克在浅碳酸盐坡道的内部区域（上侏罗腊罗，Higureuelas FM，Ne西班牙）

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The internal facies and sedimentary architecture of an Upper Jurassic inner carbonate ramp were reconstructed after the analysis and correlation of 14 logs in a 1 x 2 km outcrop area around the Mezalocha locality (south of Zaragoza, NE Spain). The studied interval is 10-16 m thick and belongs to the upper part of the uppermost Kimmeridgian-lower Tithonian Higueruelas Fm. On the basis of texture and relative proportion of the main skeletal and non-skeletal components, 6 facies and 12 subfacies were differentiated, which record subtidal (backshoal/washover, sheltered lagoon and pond/restricted lagoon) to intertidal subenvironments. The backshoal/washover subenvironment is characterized by peloidal wackestone-packstone and grainstone. The lagoon subenvironment includes oncolitic, stromatoporoid, and oncolitic-stromatoporoid (wackestone and packstone) facies. The intertidal subenvironment is represented by peloidal mudstone and packstone-grainstone with fenestral porosity. Gastropod-oncolitic (wackestone-packstone and grainstone) facies with intercalated marl may reflect local ponds in the intertidal or restricted lagoon subenvironments. Detailed facies mapping allowed us to document 7 sedimentary units within a general shallowing-upward trend, which reflect a mosaic distribution, especially for stromatoporoid and fenestral facies, with facies patches locally more than 500 m in lateral extent. External and internal factors controlled this heterogeneity, including resedimentation, topographic relief and substrate stability, combined with variations in sea-level. This mosaic facies distribution provides useful tools for more precise reconstructions of depositional heterogeneities, and this variability must be taken into account in order to obtain a solid sedimentary framework at the kilometer scale.
机译：在梅扎洛克地区（Zaragoza南部）的1×2km露头区域（Zaragoza，Ne Spain南部）分析和相关后，重建了上侏罗纪内碳酸渣斜坡的内部相和沉积结构。学习的间隔厚10-16米，属于最上面的Kimmeridgian-Lower Tithonian Higueruelas FM的上部。在主要骨骼和非骨骼成分的质地和相对比例的基础上，将6个相和12个底饼区分化，将对杂交（反叉/盥洗，遮阳伞和池塘/受限制的泻湖）进行了分化为跨越细胞。反店/垫草细胞的特征在于Peloidal Wackestone-Packstone和磨石。泻湖细胞内环境包括炎症，群状卟啉和洋光瘤卟啉（Wackestone和Packstone）相。跨透视细胞面由Peloidal Mudstone和Packstone-Trailstone表示，具有增生孔隙率。与插入Marl的腹炎 - oncolitic（Wackestone-Packstone和Graillstone）相片可能反映界京或限制泻湖细胞的当地池塘。详细的相映射使我们允许我们在一般的浅发趋势中记录7个沉积单位，这反映了马赛克分布，特别是对于血孢囊型和飞行面，在横向范围内局部地贴在500米以上。外部和内部因素控制这种异质性，包括剖归，地形释放和基材稳定性，与海平面的变化相结合。该镶嵌面分布提供了有用的工具，用于更精确的沉积异质性重建，并且必须考虑这种可变性，以便在公正尺度下获得固体沉积框架。

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