Study of secondary dolomitization and documentation of the evolution of basinal fluids and host rock, especially that of fine-grained deepwater carbonate mudstone are of interest toward of reservoir characterization. From this perspective, field characteristics in relation to mineralogy, petrography and geochemistry of the Paleaozoic carbonates of the Kinta Valley, Peninsular Malaysia, were investigated and documented. A total of 33 samples were collected across the various degree of dolomitization and analyzed for their petrographic properties (n = 55), while mineralogical and geochemical compositions (n = 33) were analyzed using XRD, ICP and ICPMS analysis, respectively. These analyses were performed to elucidate the diagenetic events, episodic dolomitization and development of fluid evolution as a function of regional tectono-thermal events during the Permian to Cenozoic. It is interpreted that the host calcareous mudstones (HCMs) were deposited in oxygenated, open marine seawaters. The studied samples retain the original seawater characteristics despite negligible, minor alterations of REE characteristics due to diagenesis and detrital input. Though the concentrations and trends of REEs of the dolomitic facies are modified to a certain extent, their affinities with HCMs are preserved. Enrichments of Mg, Mn, Na and depletion of Sr are linked to the effect of dolomitization under the open system of diagenesis. The redox conditions fluctuated to show distinct, recognizable variations between different dolomite phases. The MREE enrichments with other trace elements such as Mn, Fe and low Sr content indicate the association of diagenetic fluids with deep-circulating crustal hydrothermal fluids. Hydrothermal influence has been recorded along the fractures, which might have originated from the sub-surface litho units and facilitated episodic dolomitization, especially during significant tectono-thermal events. This study affirms that the occurrence, geochemical and mineralogical evolution of the dolomites of the Kinta Valley were controlled by magmatic events, whereas the intensity of replacement dolomitization was controlled by host rock texture, varied bulk chemistry of host rock, circulating fluid and temperature.

二次白云石化的研究和盆地流体和围岩演化的记录，特别是细粒深水碳酸盐泥岩的演化，对储层表征具有重要意义。从这个角度，对马来西亚半岛近打谷古生界碳酸盐岩的矿物学、岩石学和地球化学相关的现场特征进行了调查和记录。共采集了 33 个不同程度白云石化的样品，并分析了它们的岩相特性（n  = 55），而矿物学和地球化学成分（n = 33) 分别使用 XRD、ICP 和 ICPMS 分析进行分析。进行这些分析是为了阐明成岩事件、幕式白云石化和流体演化的发展作为二叠纪至新生代区域构造热事件的函数。据解释，宿主钙质泥岩 (HCM) 沉积在含氧的开阔海洋海水中。尽管由于成岩作用和碎屑输入对 REE 特性的微小变化可以忽略不计，但研究的样品仍保留了原始海水特性。白云质相稀土元素的浓度和变化趋势在一定程度上有所改变，但与HCMs的亲和性得以保留。Mg、Mn、Na的富集和Sr的贫化与开放成岩系统下的白云石化作用有关。氧化还原条件波动以显示不同白云石相之间的明显、可识别的变化。MREE 与其他微量元素如 Mn、Fe 和低 Sr 含量的富集表明成岩流体与深循环地壳热液流体的关联。沿裂缝记录了热液影响，这可能起源于地下岩石单元并促进了幕式白云石化，特别是在重要的构造热事件期间。本研究证实近打谷白云岩的赋存、地球化学和矿物学演化受岩浆事件控制，而置换白云岩化的强度则受主岩质地、不同主岩整体化学、循环流体和温度的控制。不同白云岩相之间可识别的变化。MREE 与其他微量元素如 Mn、Fe 和低 Sr 含量的富集表明成岩流体与深循环地壳热液流体的关联。沿裂缝记录了热液影响，这可能起源于地下岩石单元并促进了幕式白云石化，特别是在重要的构造热事件期间。本研究证实近打谷白云岩的赋存、地球化学和矿物学演化受岩浆事件控制，而置换白云岩化的强度则受主岩质地、不同主岩整体化学、循环流体和温度的控制。不同白云岩相之间可识别的变化。MREE 与其他微量元素如 Mn、Fe 和低 Sr 含量的富集表明成岩流体与深循环地壳热液流体的关联。沿裂缝记录了热液影响，这可能起源于地下岩石单元并促进了幕式白云石化，特别是在重要的构造热事件期间。本研究证实近打谷白云岩的赋存、地球化学和矿物学演化受岩浆事件控制，而置换白云岩化的强度则受主岩质地、不同主岩整体化学、循环流体和温度的控制。Fe 和低 Sr 含量表明成岩流体与深循环地壳热液的关联。沿裂缝记录了热液影响，这可能起源于地下岩石单元并促进了幕式白云石化，特别是在重要的构造热事件期间。本研究证实近打谷白云岩的赋存、地球化学和矿物学演化受岩浆事件控制，而置换白云岩化的强度则受主岩质地、不同主岩整体化学、循环流体和温度的控制。Fe 和低 Sr 含量表明成岩流体与深循环地壳热液的关联。沿裂缝记录了热液影响，这可能起源于地下岩石单元并促进了幕式白云石化，特别是在重要的构造热事件期间。本研究证实近打谷白云岩的赋存、地球化学和矿物学演化受岩浆事件控制，而置换白云岩化的强度则受主岩质地、不同主岩整体化学、循环流体和温度的控制。这可能起源于地下岩石单元并促进了幕式白云石化，特别是在重要的构造热事件期间。本研究证实近打谷白云岩的赋存、地球化学和矿物学演化受岩浆事件控制，而置换白云岩化的强度则受主岩质地、不同主岩整体化学、循环流体和温度的控制。这可能起源于地下岩石单元并促进了幕式白云石化，特别是在重要的构造热事件期间。本研究证实近打谷白云岩的赋存、地球化学和矿物学演化受岩浆事件控制，而置换白云岩化的强度则受主岩质地、不同主岩整体化学、循环流体和温度的控制。