Because of the importance of the Asmari Formation in Lurestan zone (north of the Zagros basin), Jahangirabad section with a total thickness of 179 meters consist of mixed limestone-evaporites have been studied in order to interpretfacies, paleoenvironment, sequence stratigraphy and diagenetic processes. Based on lithostratigraphic classification in Lurestan zone by Adams studies, the Asmari Formation (Late Oligocene – early Miocene deposits) in study area has been divided into 3 units (including 5 sub-units). According to the field studies and laboratory works, 13 microfacies in 5 facies association were recognized, which belong to open marine, shoal, lagoon, intertidal environments. By considering the Lower Kalhur evaporites (with observed micro-texture), which are located in the lower part of this formation, it seems that the precipitation of these evaporates has occurred in the restricted basin during fall of sea level in saline environments. The precipitation of limestone with pelagic fauna has occurred over basal anhydrite during the rise of sea level. The main recognized diagenetic processes are dissolution and dolomitization which has influence on Asmari formation in this region. Three depositional sequences were identified based on facies distribution and sequence boundary.

中文翻译：

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伊朗扎尔戈斯盆地北部KabirKuh背斜的Asmari组古环境重建，层序地层学和成岩作用

由于卢勒斯坦地区（扎格罗斯盆地北部）的阿斯马里组很重要，为了解释相，古环境，层序地层和成岩作用，研究了总厚度为179米的贾汉吉拉巴德断面，该断面由混合的石灰石-蒸发岩组成。根据亚当斯研究在卢勒斯坦地区的岩相地层学分类，研究区的阿斯马里组（晚渐新世－中新世早期沉积）被分为3个单元（包括5个子单元）。根据现场研究和实验室工作，在5个相中识别出13个微相，分别属于开放海洋，浅滩，泻湖，潮间带环境。通过考虑位于该地层下部的下卡尔胡斯蒸发岩（具有观察到的微观结构），这些蒸发的沉淀似乎发生在盐碱环境下海平面下降期间的限制盆地中。在海平面上升期间，具有浮游动物的石灰石沉淀发生在基底硬石膏上。公认的主要成岩过程是溶解和白云石化，这对该地区的阿斯马里形成有影响。根据相分布和层序边界确定了三个沉积层序。