The origin and depositional setting of dolomites remain a complex and debated topic. In the Indus Basin Pakistan, the dolomites in Jutana Formation form a thick sequence within the Cambrian stratigraphy. The current study investigates the detailed depositional setting as well as the mineralogical composition of dolomites in the Jutana Formation to provide insight into their origin. The study focuses on integrating the microfacies and Scanning Electron Microscopy (SEM) with X-ray diffraction (XRD) data along with Wireline logs of Jutana Formation in Khewra Gorge, Eastern Salt Range. Based on field and petrographic observations, four microfacies were identified including (a) siliciclastic algal laminated dolomitic breccia (MJD-1), (b) burrowed sandy ferroan dolomicrite (MJD-2), (c) in-situ medium-coarse grained dolomicrite-dolosparite (MJD-3), (d) fine grained micaceous dolosparite (MJD-4). The microfacies analysis reveals that the deposition of the Jutana Formation is primary on carbonate platform in peritidal environments, ranging from supratidal to subtidal. Digenesis has obliterated most of the primary depositional features, making the interpretation of the original depositional setting challenging. The XRD analysis suggests that these dolomites are nearly stoichiometric and less ordered, indicating an early diagenetic setting, further supported by the presence of anhydrite seen under the SEM. The original depositional setting on the carbonate platform is also supported by cross plot graph wireline logs.

白云岩的起源和沉积环境仍然是一个复杂且有争议的话题。在巴基斯坦印度河盆地，Jutana 组的白云岩在寒武系地层中形成厚层层序。目前的研究调查了 Jutana 地层中白云岩的详细沉积环境以及矿物学成分，以深入了解其起源。该研究的重点是将微相和扫描电子显微镜 (SEM) 与 X 射线衍射 (XRD) 数据以及东部盐岭 Khewra 峡谷 Jutana 地层的有线测井相结合。根据现场和岩相观察，确定了四种微相，包括（a）硅质碎屑藻层状白云岩角砾岩（MJD-1），（b）洞穴砂质铁铁白云岩（MJD-2），（c）原位中粗粒白云岩-白云石(MJD-3)，(d)细粒云母白云石(MJD-4)。微相分析表明，Jutana组的沉积主要发生在潮间带环境的碳酸盐岩台地，范围从潮上到潮下。成岩作用消除了大部分主要沉积特征，使得对原始沉积环境的解释具有挑战性。XRD 分析表明，这些白云石接近化学计量且有序性较低，表明存在早期成岩环境，SEM 下观察到的硬石膏的存在进一步支持了这一点。碳酸盐台地的原始沉积环境也得到交会图测井曲线的支持。