• 责任者：Zhou Wei (State Key Laboratory for Mineral Deposits Research ; School of Earth Sciences and Engineering ; Nanjing University ; Nanjing 210093 ; China) ; Jiang Shaoyong
• 刊名：Acta Petrologica Sinica
• 出版年：2013
• 卷期：29(12)
• 关键词：早寒武世 ; Lower Cambrian ; 志留纪 ; Silurian ; 疑源类 ; acritarchs ; 铀—铅计时 ; U-Pb dating ; 长江中下游成矿带 ; Metallogenic Belt of Middle and Lower Reaches of Yangtze River
• 页码：p.4281-4290
• 图表：8 illus., 1 plate, 53 refs.
• 分类号：1200
• issnNo：ISSN1000-0569
• isbnNo：CN11-1922/P

     Jiurui metallogenic district is one of the most important ore concentration areas in the Middle-Lower Yangtze metallogenic belt of eastern China, where occurred Chengmenshan copper deposit, Wushan copper deposit, Yangjishan gold deposit and many other import Cu-Au polymetallic ore deposits. In this paper, we carried out a systematic study on the Acritarch fossils and detrital zircon U-Pb ages from two sections in this district （Chengmenshan and Wangfushan）. At Chengmenshan section, we found that the age of the fossils, which comes from the stratum that used to be considered as Early Silurian, is actually Neoproterozoic or Early Cambrian. Combining with the data of the detrital zircon geochronology, we suggest that this stratum should be Early Cambrian. Field observation also revealed that there exists an angular unconformity between Devonian Wutong Formation and this possible Early Cambrian stratum. However, at Wangfushan, the so-called Silurian Xiken Formation is confirmed, and the age for this stratum in the Jiurui district is suggested to be later than Telychian of Silurian epoch. The beginning time of ＂Yangtze Uplift＂ in Jiurui district is thought to be later than Telychian and the ending time should be later than early Middle Devonian.