Microfacies and Zircon U-Pb Dating of the Lower Cretaceous Shipu Limestone in Xiangshan, Eastern Zhejiang Province

详细信息   

• 责任者：Wang Xueyin (State Key Laboratory of Mineral Deposits Research ; School of Earth Sciences and Engineering ; Nanjing University ; Nanjing 210093) ; Hu Wenxuan
• 刊名：Geological Review
• 出版年：2012
• 卷期：58(4)
• 关键词：沉积微相 ; sedimentary microfacies ; 白垩纪 ; Cretaceous ; 铀—铅计时 ; U-Pb dating ; 浙江 ; Zhejiang Province
• 页码：p.614-626
• 图表：6 illus., 1 table, 31 refs.
• 分类号：0803
• issnNo：ISSN0371-5736
• isbnNo：CN11-1952/P

摘要

Through the synthetic lithofacies studies for the Shipu limestone section located in Xiangshan, Zhejiang Province, four types microfacies can be recognized. Based on the researches of the cyclostratigrapy, the Shipu limestone can be divided into four sedimentary cycles which record three major transgressions. Furthermore, zircon LA-ICP-MS U-Pb dating was conduced for the tuff beds from the base and top of the section for the first time. The new radiometric age data indicated that the Shipu limestones deposited in the Early Cretaceous age from 114.2 Ma to 96.3 Ma. The authors believe that these results should stir up a new thought on the depositional environment and tectonic background of Early Cretaceous in Southeast China.