为研究崖南凹陷崖城组泥岩微量元素分布特征及其地质意义，采用ICP-MS对Y1井13个泥岩样品进行微量元素分析，研究表明：（1）泥岩微量元素中大多数亲陆性元素表现为富集，部分亲海性元素富集，指示了海陆过渡环境，沉积旋回的周期性发育在微量元素方面留下了证据，表现为U、Th、Ba、Sr等微量元素含量相关参数在垂向上存在的显著变化，界线较明显，识别出了海侵面及暴露不整合面；（2）利用Sr/Cu的比值推测研究区崖城组沉积时期气候温暖潮湿，V/(V+Ni)、Ni/Co比值指示研究区该时期为贫养环境，而高S含量的出现印证了研究区崖城期海侵事件的存在，渐新世琼东南盆地性质由断陷转化为坳陷，区域海平面处于上升阶段。%In order to investigate the distribution of trace elements of mudstone and its geological significance in the Yacheng Formation in Yanan sag, the trace elements of 13 mudstone samples that were collected from Y1 well were analyzed by ICP-MS. The results show that (1) A majority of continental elements and a minority of thalassophile elements are enriched, indicating a transitional environment. The periodic development of coal accumulation is recorded the trace elements such as U, Ba, Th, Sr showing cyclic changes with depth marked by distinct cycle boundaries. These boundaries indicate the transgression surface and the exposed surface of unconformity;(2) The climate was warm and humid during the deposition period in the Yacheng Formation in the study region as indicated by Sr/Cu, V/(V+Ni) and Ni/Co ratios indicating poor oxygen condition during this period. In addition, high S content suggests the existence of the Yacheng transgression events in the Oligocene when Qiongdongnan Basin was transformed from a faulted depression to a sag basin while the regional sea-level rose.
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