Research Progress on Major Basic Geological Problems in Shandong Province
详细信息
- 责任者：Li Hongkui (Key Laboratory of Gold Mineralization Processes and Resources Utilization ; Ministry of Land and Resources ; Shandong Institute and Laboratory of Geological Sciences ; Ji’nan 250013 ; China) ; Yang Yongbo
- 刊名：Acta Petrologica Sinica
- 出版年：2013
- 卷期：29(2)
- 关键词：大地构造 ; tectonics ; 山东 ; Shandong Province
- 页码：p.594-606
- 图表：illus., 2 tables, 53 refs.
- 分类号：1400
- issnNo：ISSN1000-0569
- isbnNo：CN11-1922/P
摘要
Based on drawing up of the 1500000 tectonic facies map of the Shandong Province and the comprehensive research, a new proposal about the tectonic evolution of the Shandong Province has been put forward. The Shandong block was formed through multi-episodes of accretion, collision, mosaic and superposition, which can be divided into three major tectonic evolution stages: Pre-Nanhua Period, Nanhua to Middle Triassic Period, Late Triassic to Quaternary Period. Geotectonic units include cratonic systems, orogenic systems and superimposed orogenic-rift systems, and three grade I tectonic units, five grade II tectonic units, eighteen grade III tectonic units and fifty-five grade IV tectonic units have been recognized. Based on the pronounced differences of stratigraphy, igneous activities, structural framework and mineralization between the western and eastern Shandong, the newly recognized Bohai block is thought as a grade II tectonic unit under the North China Block. North boundary of the Dabie-Sulu orogenic belt and boundary between the western Shandong block and the Bohai block have been determined. The Paleoproterozoic Jinshan and Fenzishan groups were thought to be formed in a back-arc basin located on the continental margin and then both of them were involved in the orogenic process in the Paleoproterozoic. The Jingshan Group has also experienced deep-subduction and high-pressure granulite-facies metamorphism. Tectonic-thermal events and gold-mineralization in the eastern Shandong were controlled by the Tethys, Paleo-Asian Ocean and Pacific Ocean. Gold ore was formed in the Mesozoic transformation of tectonic regime and lithosphere thinning, strongly related with the collision between the North China and South China blocks and subduction of the Pacific plate.
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