Abstract The present is the key to the past. Based on the dissection of modern beach-bars in the Qinghai Lake, Qinghai-Tibet Plateau, China, including two profiles parallelly to the shoreline, two profiles vertically to the shoreline and one plane-view profile, the sedimentary succession and recognition marks of lacustrine gravel beach-bars have been summarized. Vertically, the lacustrine gravel beach-bars develop with the “ABC” succession. The A interval, the B interval, and the C interval respectively correspond with the gravelly sand facies, the well-sorted gravel facies, and the graded sand facies. The lacustrine gravel beach-bars is composed of several combinations of the “ABC” succession, such as “ABAB”, “ABCABC”, “BCBC”. The main recognition marks of lacustrine gravel beach-bars is the following: the bottom contact is distinct and with the “ABC” succession; and the lacustrine beach-bars develop the swash bedding and sheet-like parallelly to the lakeshore. These viewpoints have significant contributions to the reconstruction of paleoenvironments and paleoshorelines and to the reservoir interpretation within lacustrine beach-bar clastic bodies.

中文翻译：

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湖相砾石滩坝沉积演替与识别标志——以青海湖为例

摘要 现在是通向过去的钥匙。基于对青藏高原青海湖现代滩坝的解剖，包括两条与岸线平行的剖面、两条与岸线垂直的剖面和一条平面剖面，以及湖泊的沉积层序和识别标志已经总结了砾石海滩酒吧。纵向上，湖相砾石滩坝沿“ABC”层序发育。A层、B层、C层分别对应砾石砂相、分选良好的砾石相、级配砂相。湖相砾石滩坝由“ABC”系列的“ABAB”、“ABCABC”、“BCBC”等几种组合组成。湖相砂砾滩坝的主要识别标志如下：底部接触明显且具有“ABC”序列；湖岸滩坝与湖岸平行发展成斜层状和片状。这些观点对古环境和古海岸线的重建以及湖相滩坝碎屑体内的储层解释具有重要贡献。