• 责任者：Zhong Xiaoyong (Key Laboratory of Salt Lake Resources and Chemistry ; Qinghai Institute of Salt Lake ; Chinese Academy of Sciences ; Xining 810008 ; China) ; Yuan Qin
• 刊名：Acta Geoscientica Sinica
• 出版年：2012
• 卷期：33(3)
• 页码：p.323-330
• issnNo：ISSN1006-3021
• isbnNo：CN11-3474/P

In this paper , the authors analyzed sporopollen over the potassium salt layer of ZK012 in the Wentai mining area of Khammouane, Laos. According to the characteristics of sporopollen, the authors define it as Classopollis-Ephedripites-Exesipollenites assemblage. A comparative analysis of the sedimentary characteristics of ZK309 drill hole was also made, which has the same depositional sequence as ZK012. In addition, the unconformity between the evaporate and the underlying sandstone was found at the bottom of ZK309. On such a basis, the authors consider that the Yanshanian movement in early Late Cretaceous caused the rising of the earth crust and the tectonic deformation of this area. Ancient seawater was retained in the big trap structure of Khorat basin alongwith the regression, and evaporites were deposited under the condition of subsequent arid climate.