Reiterative Fault Systems and Superimposed Mineralization in the Jiurui Metallogenic Cluster District, Middle and Lower Yangtze River Mineralization
详细信息
- 责任者：Jiang Shaoyong (State Key Laboratory for Mineral Deposits Research ; School of Earth Sciences and Engineering ; Nanjing University ; Nanjing 210093 ; China) ; Sun Yan
- 刊名：Acta Petrologica Sinica
- 出版年：2010
- 卷期：26(9)
- 关键词：叠加成矿作用 ; superposed metallogenesis ; 断裂 ; fractures ; 江西 ; Jiangxi Province
- 页码：p.2751-2767
- 图表：13 illus., 2 tables, 110 refs.
- 分类号：1001
- issnNo：ISSN1000-0569
- isbnNo：CN11-1922/P
摘要
Based on detailed underground and field observation together with regional structure analysis,this paper discussed the feature and evolution of the reiterative fault system and superimposed mineralization and their relationship in the Jiurui ore concentrated district,Jiangxi Province,China.Three fault systems are described,namely,the Hercynian syn-sedimentary fault system developed along the continental margins,Indosinian folding and fault system,and Late Yanshanian negative inversion fault system.Taking the Wushan copper deposit as an example,we revealed the initiation and development of F1 fault during the three stages and their controls on mineralization.A three-stage conceptual model is proposed as following.During the first Hercynian stage,extension and rifting occurred along the continental margins and a two sub-stage of syn-sedimentary fault system developed.In the later sub-stage,the tensile fractures combined with the deep-seated fault developed which allow the submarine volcanic eruption and hydrothermal ore-forming fluids ascend to form bedded and massive copper-bearing pyrite orebodies.During the second Indosinian stage,the folding and fault development may have caused reverse movement of the previously deposited sedimentary bedded orebodies.During the thrid stage of Late Yanshanian,development of high angle fold-thrust and regional stress may have caused the fault system transformed from compressive into brittle tensile structures,and formed negative inversion structure.Together with the faulting,magmatic-hydrothermal fluids contributed to formation of new orebodies that were superimposed on previous syn-sedimentary mineralization system.