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首页> 外文期刊>Geologica Carpathica >Correlation of Tethyan and Peri-Tethyan long-term and high-frequency eustatic signals (Anisian, Middle Triassic)
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Correlation of Tethyan and Peri-Tethyan long-term and high-frequency eustatic signals (Anisian, Middle Triassic)

机译：Tethyan和Peri-Tethyan长期和高频欣快信号的相关性（阿尼西亚，中三叠纪）

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摘要

During Anisian times, broad ramp systems developed on the northwestern Tethys shelf and in the adjacentPeri-Tethyan realm. In both paleogeographical settings carbonate series display characteristic cyclic patterns, reflectinglong-term and high-frequency eustatic sea-level changes. Facies successions recognized within the small-scale sedi-mentary cycles document a rapid transgressive phase followed by a prolonged highstand phase. The erosional base ofthese deposits is interpreted as a sequence boundary. Transgressive deposits are characterized by bioclastic limestoneswith reworked lithoclasts. Bioturbated mudstones represent the highstand deposits. Sedimentation of laminated mud-stones is documented during the late highstand phase. Maximum flooding is recognized by thin condensed marly layersat the top of bioclastic beds. Such meter-scale sedimentary cycles are the basic stratigraphic building blocks of theAnisian series of Hungary and Germany, representing ramp deposits of the proximal Tethys shelf and the northern Peri-Tethys Basin, respectively. Comparison of both depositional environments leads to a better understanding of cyclicsedimentation of shallow-water carbonates and controlling factors. Eustatic signals of different scales are analysed andused for correlation of sedimentary series between different paleogeographical settings.
机译：在Anisian时代，在特提斯西北部陆架和邻近的Peri-Tethyan领域发展了宽斜坡系统。在这两个古地理环境中，碳酸盐系列均显示出特征性的循环模式，反映了长期和高频的欢乐海平面变化。在小规模沉积周期内认识到的相演替证明了一个快速的海侵阶段，随后是一个延长的高压期。这些沉积物的侵蚀基础被解释为层序边界。海侵性沉积物的特征是生物碎屑灰岩与重塑的碎石碎屑。生物扰动泥岩代表高位沉积物。高压层后期记录了层状泥岩的沉积。在生物碎屑床顶部的薄层凝结的马里岩层可以识别出最大的洪水。这种米级的沉积循环是匈牙利和德国的阿尼西亚系列的基本地层构造块，分别代表了特提斯陆架近段和北部特提斯盆地的斜坡沉积。两种沉积环境的比较可以使人们更好地理解浅水碳酸盐的循环沉淀作用及其控制因素。分析并使用了不同尺度的欣快信号，以用于不同古地理环境之间的沉积系列的相关性。

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