A new conceptual diagenetic model is proposed to better understand the relationship between multi-scale tectonic and the ensuing diagenetic processes, whereby the physio-chemical fluid-rock interaction processes are linked to tectonic controls, in terms of creation or destruction of accommodation space, the evolution of overburden and compaction, exhumation, as well as fracturing and creation of fluid flow pathways. In our research, key processes involved in diagenetic fluid-rock interactions have been applied to a recent multi-scale tectonically induced sedimentation model in order to define a linked diagenetic-tectonic cyclicity concept. We demonstrate the applicability of this concept in various tectonic and depositional systems with worldwide examples. Four distinct diagenetic fluid types modify the properties of sedimentary systems, which are basinal fluids, compactional fluids, meteoric fluids, and fault-associated fluids. The related, time-independent, diagenetic facies and their extent in the subsurface defined as diagenetic facies tracts include the modified rock affected by a singular diagenetic fluid or process. The proposed diagenetic facies tracts are the basinal diagenetic facies tract, compactional diagenetic facies tract, meteoric diagenetic facies tract and fracture-associated diagenetic facies tract. Their subsurface extent is controlled by the tectonic evolution, and we demonstrate that quantification and prediction is possible using a previously defined tectonic successions model. Each diagenetic facies tract is associated with a set of diagenetic processes and resulting products, that ultimately impact the pore space of the host rock and its flow properties. The combinations of several diagenetic tracts (into diagenetic facies tracts complexes) have been assessed, showing that the optimal situation for enhanced flow is the one that combines meteoric diagenetic facies tracts with fracture-associated diagenetic facies tracts, where karst dissolution together with fracturing are common. Contrastingly, quiescent tectonic settings with a typical burial history result in excessive cementation and therefore reduced flow. These attributes are critical for the large-scale screening and quantification of subsurface geo-resources, conventional and particularly important for the sustainable ones (e.g., geothermal energy) and geological storage (e.g., CO2 or energy) that are associated with enhanced fluid-rock interaction processes.

中文翻译：

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概念化流体-岩石相互作用成岩模型，重点关注构造环境


提出了一种新的概念成岩模型，以更好地理解多尺度构造和随后的成岩过程之间的关系，其中物理-化学流体-岩石相互作用过程与构造控制有关，包括住宿空间的创造或破坏、覆盖层和压实的演变、挖掘以及压裂和流体流动路径的创建。在我们的研究中，成岩流体-岩石相互作用所涉及的关键过程已被应用于最近的多尺度构造诱导沉积模型，以定义一个相互关联的成岩-构造旋回概念。我们通过世界范围内的例子证明了这一概念在各种构造和沉积系统中的适用性。四种不同的成岩流体类型改变了沉积系统的特性，它们是盆地流体、压实流体、大气流体和断层相关流体。相关的、与时间无关的成岩相及其在定义为成岩相区的地下范围包括受单一成岩流体或过程影响的改性岩石。拟议的成岩相区是盆地成岩相区、压实成岩相区、大气成岩相区和裂缝相关成岩相区。它们的地下范围受构造演化控制，我们证明了使用先前定义的构造演替模型可以进行量化和预测。每个成岩相区都与一组成岩过程和产生的产物有关，这些过程和产生的产物最终影响主岩的孔隙空间及其流动特性。 已经评估了几个成岩带（成岩成岩相带复合体）的组合，表明增强流动的最佳情况是将流星成岩相区与裂缝相关的成岩相区相结合，其中喀斯特溶蚀和压裂很常见。相比之下，具有典型埋藏历史的静止构造环境导致过度胶结，因此流量减少。这些属性对于地下地质资源的大规模筛选和量化至关重要，对于与增强的流体-岩石相互作用过程相关的可持续地质资源（例如地热能）和地质储存（例如 CO2 或能源）尤其重要。