Geological Evolution of Longhushan World Geopark in Relation to Global Tectonics

作     者：Timothy M Kusky 叶明和 王军鹏 王璐 

作者机构：Three Gorges Research Center for Geo-hazardsMinistry of Education and State Key Laboratory of Geologic Processes and Mineral ResourcesChina University of Geosciences Longhushan Administrative CommitteePlanning Bureau of Yingtan City Faculty of Earth SciencesChina University of Geosciences Three Gorges Research Center for Geo-hazardsMinistry of EducationChina University of Geosciences College of Marine GeosciencesOcean University of China 

出 版 物：《Journal of Earth Science》 (地球科学学刊（英文版）)

年 卷 期：2010年第21卷第1期

页      面：1-18页

核心收录：

学科分类：070904[理学-构造地质学] 0709[理学-地质学] 07[理学] 0708[理学-地球物理学] 0704[理学-天文学] 

基　　金：supported by the National Natural Science Foundation of China (No. 40821061) Ministry of Education of China (No. B07039) Longhushan Administrative Committee,Starting Fund of Three Gorges Research Center for Geo-hazards, Ministry of Education, China 

主　　题：Longhushan Cathyasia South China fold belt Danxia red bed ridge subduction. 

摘      要：The South China fold belt has experienced a complex series of tectonic events that span 1.0 billion years of earth history. Longhushan （龙虎山） World Geopark is located on the Proterozoic suture between the Yangtze craton and Cathyasia block and highlights the long history of this belt. Collision of the Cathyasia and Yangtze cratons 1.0 billion years ago was associated with the formation of the Rodinian supercontinent where most of the planet＇s landmasses were amalgamated into one block. Jurassic through Early Cretaceous magmatism was associated with the inland migration of the continental margin arc associated with the penetration of a flat slab after subduction of the Kula-Farallon ridge. Slab roll-back in the Early to Middle Cretaceous opened many extensional basins across the South China fold belt, including the Xinjiang （信江） basin in which Longhushan is located, and these were filled largely with continental red beds deposited by fluvial systems in the hot torrid climate. The beds are richly fossiliferous, including remains of many dinosaurs and dinosaur eggs. Subduction of the Kula-Pacific plate in the Middle Cretaceous caused a short magmatic pulse, and then, the basins subsided slowly through the remainder of the Cretaceous. Cenozoic uplift of the red bed basins was initiated by the India- Asia collision. The uplift was associated with the formation of many faults, joints, and brittle structures that dissected the red bed deposits. Fluvial erosion of the red beds was enhanced along the brittle structures, and different locations have developed very distinctive and structuraliy controlled geomorphological features including mesas, kopjies, and isolated stone peaks that are known in China as Danxia （丹霞） land-forms. Together, these features form Danxia landscapes, and Longhushan World Geopark exhibits a complete range of the Danxia landscapes from juvenile, to mature and to old stages of development. The United Nations Educational, Scientific, and Cultural Organiz