Identification and Genesis of the Early Cretaceous Shoshonitic Volcanic Rock Series in Central Jiangxi Province
详细信息
- 责任者：Wu Junqi (State Key Laboratory of Mineral Deposits Research ; School of Earth Sciences and Engineering ; Nanjing University ; Nanjing 210093 ; China) ; Tan Guili
- 刊名：Geological Journal of China Universities
- 出版年：2011
- 卷期：17(4)
- 关键词：橄榄玄武岩 ; olivine basalt ; 江西 ; Jiangxi Province
- 页码：p.479-491
- 图表：15 illus., 5 tables, 39 refs.
- 分类号：0801
- 出版序号：20122320
- issnNo：ISSN1006-7493
- isbnNo：CN32-1440/P
摘要
///The forth unit of the Daguding Group in central Jiangxi Province consists of intermediate to basic volcanic rocks in the Shengyuan basin and adjacent areas. The systematic study of petrology and geochemistry of this unit identifies that these rocks belong to typical interplate shoshonitic volcanic rock series, which are characterized by high contents of total alkali and K2O, low contents of TiO2 and iron, and an enrichment of the LREE and LILE elements. According to the two-component (Sr-Nd) mixing equation, the source of the shoshonite series is composed of about 37% DM endmenber and 63% LEM endmember. The existence of the Early Cretaceous shoshonitic volcanic rock series in central Jiangxi Province suggests an important episode of extension in South China during the late Yanshanian period.