Changes in sedimentary profiles and stratigraphic architecture over time in lake basins are shown to be relevant markers of climate changes in terrestrial palaeoenvironments. The stratigraphic architecture of the Priabonian (late Eocene)–early Rupelian (early Oligocene) Alès–Saint-Chaptes–Issirac saline lake system has been reconstructed from the sedimentological, biostratigraphic and magnetostratigraphic analysis of outcrops and well cores. As a function of the inflow–evaporation balance, three distinct depositional models have been proposed for the Priabonian Alès–Saint-Chaptes–Issirac lake system which is characterized by both fault-controlled and low-angle ramp-like margins: (i) freshwater to oligohaline lake; (ii) oligohaline to mesohaline closed-lake; and (iii) hypersaline, evaporitic closed-lake. Two major stages of lake spreading (possibly middle Priabonian and late Priabonian–early Rupelian) separated by two stages of significant lake closure represented by evaporite succession in the Alès Basin depocentre (middle to late Priabonian) have been evidenced. Regional tectonics and climate induced changes in inflow–evaporation balance of the lake and controlled the development of transgressive–regressive cycles with calcium-sulphate sedimentation during regression in the lake depocentre (Alès Basin) and during early transgression in lake margins (Saint-Chaptes and Issirac basins). The correlation between the palaeohydrological cycles inferred for the Alès–Saint-Chaptes–Issirac lake system and the regional climate changes of Priabonian stage, prior to the Eocene–Oligocene transition, strongly suggests that climate significantly impacted the nature of lacustrine depositional models and the depositional architecture of Palaeogene, syn-rift, saline lake basins from Western Europe.

中文翻译：

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盐湖系统的地层结构：从湖沉积中心（Alès 盆地）到边缘（Saint-Chaptes 和 Issirac 盆地），始新世-渐新世过渡，法国东南部

湖盆沉积剖面和地层结构随时间的变化被证明是陆地古环境气候变化的相关标志。通过露头和井芯的沉积学、生物地层学和磁地层学分析，重建了普里雅博世（晚始新世）-早鲁佩世（早渐新世）Alès-Saint-Chaptes-Issirac盐湖系统的地层结构。作为流入 - 蒸发平衡的函数，已经提出了三种不同的沉积模型，用于 Priabonian Alès-Saint-Chaptes-Issirac 湖系统，其特征在于断层控制和低角度斜坡状边缘：（i）淡水去寡盐湖；(ii) 低盐至中盐闭湖；(iii) 高盐、蒸发闭湖。已经证明了湖泊扩张的两个主要阶段（可能是中普里雅博世和晚普里雅博世 - 早鲁佩世）被两个重要的湖泊闭合阶段隔开，以阿莱斯盆地沉积中心（普里雅博世中晚期）为代表的蒸发岩演替。区域构造和气候导致湖泊流入-蒸发平衡发生变化，并在湖泊沉积中心（Alès 盆地）回归期间和湖缘早期海侵期间（Saint-Chaptes 和伊西拉克盆地）。Alès-Saint-Chaptes-Issirac湖系统推断的古水文循环与始新世-渐新世过渡之前的普里雅本期区域气候变化之间的相关性，