Coarse‐grained turbidite systems have been broadly described mostly on tectonically active basins, but there is lack of a detailed depositional and facies model in relatively unconfined settings. A large outcrop of the Los Molles Formation in Neuquen Basin is used to build the architecture, hierarchy and facies distribution of a coarse‐grained turbidite system. A high‐resolution satellite image, drone imagery and 4000 m of deposits measured in 20 locations with detailed facies description are used to build isopach and net to gross maps that allowed reconstruction of the system. The turbidite system is composed of five lobe complexes (each averaging 40 m thick). Each lobe complex is composed of two to six lobes (each averaging 5 m thick) that are formed by bed‐sets interpreted as basin floor distributary channels and unconfined flows. The lobe complexes show an overall aggradational pattern with minor progradation and retrogradation of the system and they also tend to stack compensationally in an autocyclic manner. The main characteristics of the system are: along lobe depositional‐axis, beds are thick and coarse with a high proportion of channels and high density turbidites, and 70 to 100% net:gross. In contrast, off depositional‐axis, beds are thinner, and fine to medium‐grained sandstone beds dominate; there is higher proportion of low density turbidites, and 30 to 70% net:gross. Lobe complexes are elongated (8 km wide and up to 20 km long), have high thinning rates (9 m km⁻¹ on average) and at their distal end present finger‐like geometries. These deposits potentially represent good hydrocarbon reservoirs in the subsurface and therefore it is important to consider key aspects such as: (i) the proximity to the axis of the system; higher net:gross translates into fewer mud heterogeneities that could compartmentalize the reservoirs; (ii) geometry is elongated and serrated, and sand pinch‐outs might not occur homogenously; and (iii) topographic influence might decrease the risk of hydrocarbon leakage up‐dip.

中文翻译：

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粗粒盆地底部浊度系统–阿根廷内乌肯盆地侏罗纪Los Molles组

粗粒混浊系统主要在构造活跃的盆地上得到了广泛的描述，但是在相对受限的环境中缺乏详细的沉积和相模型。内乌肯盆地Los Molles地层的一个大露头被用来构造粗粒浊度系统的结构，层次和相分布。使用高分辨率卫星图像，无人机图像和在20个位置测量的4000 m沉积物（具有详细的相描述），用于构建等值线和网状到总图，从而可以重建系统。浊石系统由五个叶状复合体组成（每个复合体平均厚度为40 m）。每个瓣叶由两到六个瓣叶（每个瓣叶平均5 m厚）组成，这些瓣叶床由床盆形成，这些盆床被解释为盆底分配通道和无限制流动。叶片复合物显示出总体的凝集模式，系统的分解和逆行较小，它们还倾向于以自循环的方式进行补偿性堆积。该系统的主要特征是：沿波瓣沉积轴，床层厚而粗糙，具有高比例的通道和高密度浊石，净重：70％至100％。相反，在离沉积轴较远的地方，床层较薄，而细至中粒度的砂岩床层占主导地位。低密度浊石的比例更高，净比重为30％至70％。叶片复合体拉长（宽8公里，最长20公里），稀疏率高（900万公里）该系统的主要特征是：沿波瓣沉积轴，床层厚而粗糙，具有高比例的通道和高密度浊石，净重：70％至100％。相反，在离沉积轴较远的地方，床层较薄，而细至中粒度的砂岩床层占主导地位。低密度浊石的比例更高，净比重为30％至70％。叶片复杂（宽8公里，最长20公里），稀疏率高（900万公里）该系统的主要特征是：沿波瓣沉积轴，床层厚而粗糙，具有高比例的通道和高密度浊石，净重：70％至100％。相反，在离沉积轴较远的地方，床层较薄，以细粒至中粒砂岩床为主。低密度浊石的比例更高，净比重为30％至70％。叶片复杂（宽8公里，最长20公里），稀疏率高（900万公里）平均^-1），并且在其远端呈手指状的几何形状。这些沉积物潜在地代表了地下良好的油气储层，因此重要的考虑因素包括：（i）与系统轴线的距离；较高的净额：总收入意味着更少的泥浆非均质性可能使储层分隔。（ii）几何形状被拉长并呈锯齿状，并且可能不会均匀地出现沙粒挤压现象；（iii）地形影响可能会降低油气泄漏上倾的风险。