The onshore Lusitanian Basin is dominated by two large diapiric salt walls which extend for up to 100 km. Seismic sections indicate that stratal onlap onto an intervening salt pillow initiated in Early Jurassic times. Well-exposed diapir flanks reveal three types of halokinetic-related unconformities (hook, low-angle wedge and high-angle flap-onlap – a new term) of Kimmeridgian to Turonian age, indicating that diapirism was active throughout this period. Stratal dip-fanning and wedge-thinning is predominantly caused by original sedimentary depositional processes with multiple low-angle unconformities (1°–5° pinchout angles) in both carbonate- and clastic-dominated sequences. No significant sedimentary slumping was observed in the clastic-dominated strata but important slumping of flank material is present in the carbonate-dominated sequences. Two tar accumulations are derived from oil trapped in sandstones on the flanks of the Sao Pedro de Moel and Santa Cruz salt diapirs. These are interpreted to be exhumed, but now biodegraded, oilfields. To our knowledge, these are the only exposed examples of salt-flank hydrocarbon accumulations that have been documented in the literature.

中文翻译：

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葡萄牙卢西塔尼亚盆地上翻盐底辟侧翼的变形沉积过程和油气聚集

陆上卢西塔尼亚盆地由两个长达 100 公里的大型底辟盐墙控制。地震剖面表明，地层上叠到早侏罗世时期开始的介入盐枕上。暴露良好的底辟侧翼揭示了从 Kimmeridgian 到 Turonian 时代的三种与盐动力学相关的不整合面（钩状、低角度楔形和高角度襟翼上搭——一个新术语），表明底辟作用在整个时期都很活跃。地层倾斜扇形和楔形变薄主要是由原始沉积沉积过程引起的，在碳酸盐岩和碎屑岩为主的层序中具有多个低角度不整合面（1°-5°尖灭角）。在碎屑岩为主的地层中没有观察到明显的沉积塌陷，但在碳酸盐为主的层序中存在重要的侧翼物质塌​​陷。两个焦油堆积来自圣佩德罗德莫尔和圣克鲁斯盐底辟侧翼砂岩中的石油。这些被解释为挖掘出来的，但现在是生物降解的油田。据我们所知，这些是文献中记录的盐侧油气聚集的唯一暴露例子。