Mixed siliciclastic‐carbonate deep‐marine systems (mixed systems) are less documented in the geological record than pure siliciclastic systems. The similarities and differences between these systems are, therefore, poorly understood. A well‐exposed Late Cretaceous mixed system on the northern side of the Eastern Greater Caucasus, Azerbaijan, provides an opportunity to study the interaction between contemporaneous siliciclastic and carbonate deep‐marine deposition. Facies analysis reveals a Cenomanian–early Turonian siliciclastic submarine channel complex that abruptly transitions into a Mid Turonian–Maastrichtian mixed lobe‐dominated succession. The channels are entrenched in lows on the palaeo‐seafloor but are absent 10 km towards the west where an Early Cretaceous submarine landslide complex acted as a topographic barrier to deposition. By the Campanian, this topography was largely healed allowing extensive deposition of the mixed lobe‐dominated succession. Evidence for irregular bathymetry is recorded by opposing palaeoflow indicators and frequent submarine landslides. The overall sequence is interpreted to represent the abrupt transition from Cenomanian–early Turonian siliciclastic progradation to c. Mid Turonian retrogradation, followed by a gradual return to progradation in the Santonian–Maastrichtian. The siliciclastic systems periodically punctuate a more widely extensive calcareous system from the Mid Turonian onwards, resulting in a mixed deep‐marine system. Mixed lobes differ from their siliciclastic counterparts in that they contain both siliciclastic and calcareous depositional elements making determining distal and proximal environments challenging using conventional terminology and complicate palaeogeographic interpretations. Modulation and remobilisation also occur between the two contemporaneous systems making stacking patterns difficult to decipher. The results provide insight into the behaviour of multiple contemporaneous deep‐marine fans, an aspect that is challenging to decipher in non‐mixed systems. The study area is comparable in terms of facies, architectures and the presence of widespread instability to offshore The Gambia, NW Africa, and could form a suitable analogue for mixed deep‐marine systems observed elsewhere.

中文翻译：

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硅碳-碳酸盐混合深海系统在不稳定边缘的演化：东部大高加索地区的白垩纪，阿塞拜疆

混合的硅碳-碳酸盐深海系统（混合系统）在地质记录中的记录要少于纯硅弹-系统。因此，人们对这些系统之间的相似性和差异知之甚少。东部大高加索北部的一个暴露良好的晚白垩纪混合系统，阿塞拜疆，为研究当代硅质碎屑与碳酸盐深海沉积之间的相互作用提供了机会。岩相分析揭示了一个塞诺曼期—早期的Turonian硅质碎屑海底河道复合体，突然转变为中Turonian-Maastrichtian混合叶为主的演替。河道在古海底处固守在低点，但在向西10公里处不存在，早白垩纪海底滑坡复合体成为沉积的地形障碍。到了Campanian，这种地形得到了很大程度的修复，从而使得混合叶为主的演替过程得以大量沉积。相反的古流指示符和频繁的海底滑坡记录了不规则测深的证据。整个序列被解释为代表了从塞诺曼期–早期土伦期的硅质碎屑向c的突然过渡。土伦中期退化，随后在桑顿－马斯特里赫特逐渐恢复退化。硅质碎屑系统从中土伦开始周期性地穿刺范围更广的钙质系统，形成了深海混合系统。混合裂片与硅质碎屑对应物的不同之处在于，它们同时包含硅质碎屑和钙质沉积元素，这使得使用常规术语和复杂的古地理解释来确定远端和近端环境具有挑战性。调节和移动也发生在两个同时期的系统之间，使得堆叠模式难以破译。结果提供了对多个同时期深海风扇行为的洞察力，这对于在非混合系统中破译具有挑战性。该研究区域在相，构造以及近海冈比亚，非洲西北部普遍存在的不稳定性方面具有可比性，并且可以为其他地方观测到的混合深海系统提供合适的类似物。调节和移动也发生在两个同时期的系统之间，使得堆叠模式难以破译。结果提供了对多个同时期深海风扇行为的洞察力，这对于在非混合系统中破译具有挑战性。该研究区域在相，构造以及近海冈比亚，非洲西北部普遍存在的不稳定性方面具有可比性，并且可以为其他地方观测到的混合深海系统提供合适的类似物。调节和移动也发生在两个同时期的系统之间，使得堆叠模式难以破译。结果提供了对多个同时期深海风扇行为的洞察力，这对于在非混合系统中破译具有挑战性。该研究区域在相，构造以及近海冈比亚，非洲西北部普遍存在的不稳定性方面具有可比性，并且可以为其他地方观测到的混合深海系统提供合适的类似物。