Bed-parallel, mineralized fractures are common in source rocks and generally consist in mm to cm thick veins developed parallel to bedding known as beef or bedding-parallel veins. Considering they can form a dense network of mechanical discontinuities, the prediction of beef distribution is a major issue impacting shale reservoir production. Beef distribution is predominantly controlled by the lithological characteristics of source rocks and we here decipher the relation between mineralogical and chemical proxies controlled by orbital parameters and distribution of the beef along a Late Jurassic section of the well-known Vaca Muerta Formation source rock in the Neuquen Basin. Using multiple proxies collected along the beef-rich Huncal section, we show that Milankovitch cycles rule the mineralogical evolution and beef distribution in these organic-rich mudrocks. Cycles inferred from the statistical treatment of sedimentary (magnetic susceptibility, elemental and mineralogical ratios), biogenic (total organic carbon) and diagenetic (beef distribution and thickness) signals revealed indeed the influence of an astroclimatic fingerprint in sediments and on processes controlling mineralized fracture generation and distribution. The astroclimatic memory recorded in many source rocks worldwide is therefore envisaged as a suitable proxy for the prediction of mineralized fracture distribution

中文翻译：

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烃源岩顺层脉（牛）分布及厚度的米兰科维奇指纹图

平行床层的矿化裂缝在烃源岩中很常见，通常由毫米到厘米厚的脉组成，平行于被称为牛脉或平行层理的层理发育。考虑到它们可以形成一个密集的机械不连续网络，牛肉分布的预测是影响页岩储层生产的主要问题。牛肉分布主要受烃源岩的岩性特征控制，我们在这里破译了受轨道参数控制的矿物学和化学代理与内乌肯著名的 Vaca Muerta 组烃源岩晚侏罗世剖面的牛肉分布之间的关系盆地。使用沿富含牛肉的 Huncal 部分收集的多个代理，我们表明米兰科维奇循环支配着这些富含有机质泥岩中的矿物演化和牛肉分布。从沉积（磁化率、元素和矿物学比率）、生物（总有机碳）和成岩（牛肉分布和厚度）信号的统计处理推断出的周期确实揭示了沉积物中星形气候指纹和控制矿化裂缝生成过程的影响和分布。因此，世界范围内许多烃源岩中记录的天体气候记忆被认为是预测矿化裂缝分布的合适代表 生物（总有机碳）和成岩（牛肉分布和厚度）信号确实揭示了沉积物中的天体气候指纹对控制矿化裂缝生成和分布的过程的影响。因此，世界范围内许多烃源岩中记录的天体气候记忆被认为是预测矿化裂缝分布的合适代表 生物（总有机碳）和成岩（牛肉分布和厚度）信号确实揭示了沉积物中的天体气候指纹对控制矿化裂缝生成和分布的过程的影响。因此，世界范围内许多烃源岩中记录的天体气候记忆被认为是预测矿化裂缝分布的合适代表