Abstract A sequence stratigraphic analysis of the Asmari and Pabdeh Formations (Oligocene) carbonate factory in the Kalhur sub-basin of the Zagros foredeep in SW Iran established the depositional attributes and facies patterns of the abnormally deep-T-platforms in response to global sea-level fluctuations. The paleoecology, paleogeography and hydrodynamic properties affected symbiotic large benthic foraminifers (SLBF) to determine the carbonate generation window and steepened ramp systems building from gravel-producing biota within the oligophotic zone. Four facies belts, containing five lithofacies and ten microfacies like those of C-platforms, were identified from grain associations and standard depositional criteria. Highstand systems tracts formed of uncemented and unconsolidated close-cluster reefs developed in the lower mid-ramp to upper part of the outer ramp and prograded below storm wave base (SWB). Portions of the reefs above SWB were eroded and transported downslope to the distal portion of the outer ramp and the proximal part of the basin as tempestites, created by periodic storms. In the subsequent sea-level fall, these platforms were eroded during periodic storms, shedding large volumes of calciturbidites, just as they do in C-platforms. The Rupelian succession consists of three third-order sequences, namely Ru. 1, Ru. 2 and Ru. 3. Further comparison of sea-level and onlap curves in the study area with global and Arabian platform sea-level and onlap curves, provides an exact chronostratigraphic framework, revealing a close correlation with eustatic events in the Zagros foredeep.

中文翻译：

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伊朗西南部 Zagros Foredeep Kalhur 子盆地的全球海平面波动、渐新世 Asmari 和 Pabdeh 地层的深 T 平台响应

摘要 伊朗西南部 Zagros 前渊 Kalhur 子盆地 Asmari 和 Pabdeh 组（渐新世）碳酸盐工厂的层序地层分析确定了异常深 T 台地的沉积属性和相模式，以响应全球海-水平波动。古生态学、古地理和流体动力学特性影响了共生的大型底栖有孔虫 (SLBF)，以确定碳酸盐生成窗口和由寡光区内产砾石生物群构建的陡峭斜坡系统。根据颗粒组合和标准沉积标准确定了 4 个相带，包含 5 个岩相和 10 个类似 C 平台的微相。由未胶结和未固结的紧密簇状珊瑚礁形成的高位系统域，发育在中斜坡下部到外斜坡上部，并在风暴波基 (SWB) 下进积。SWB 上方的部分珊瑚礁被侵蚀并沿斜坡向下移动到外部斜坡的远端部分和盆地的近端部分，作为周期性风暴产生的风暴。在随后的海平面下降中，这些平台在周期性风暴期间被侵蚀，脱落大量的钙质浊积岩，就像它们在 C 平台中所做的那样。Rupelian 序列由三个三阶序列组成，即 Ru。1、茹。2 和茹。3. 进一步对比研究区海平面和上超曲线与全球和阿拉伯平台海平面和上超曲线，提供准确的年代地层框架，