- 责任者：Yao Xu (School of Geosciences ; China University of Petroleum ; Qingdao 266580 ; China) ; Zhou Yaoqi
- 刊名：Advances in Earth Science
- 出版年：2013
- 卷期：28(11)
- 关键词：硅质岩 ; silicolite
- 页码：p.1189-1200
- 图表：4 illus., 2 tables, 90 refs.
- 分类号：0803
- issnNo：ISSN1001-8166
- isbnNo：CN62-1091/P
Cherts are concret research objects for petro-tectonic framework and are widespreadly distributed in special sedimentary environments along orogenic belts and depositional basins. Cherts hold abundant origin-related information, which plays important role in palogeographie and paleooceanograpic study. This paper reviewed the history and the advancement of research on chert, especially paying more attention to the research progress about both bedded chert and nodular chert in domestic and international research areas. Combined with Permian cherts distribution in China, we discuss research aehivements of silica sources, sedimentary environments and original mechanism from cherts deposited in different sedimentary environments such as oceanic rift, oceanic basin and con- tinent shelf. ＂Permian Chert Event＂ （PCE） has been used to discribe the widespread biogenic Permian cherts that occurred around the eastern margins of Panthalassa and Paleotethys Ocean. Research results on Permian cherts in eastern Paleotethys Ocean, particularly the Yangtze areas, are examined here, which suggest Permian cherts are not typically biogenic in origin but severely influenced by hydrothermal sedimentation. The seasonal melting of sea ice is assumed engine for PCE in northwest edge of Pangea Supercontinent, but that dose not work in China. There- fore, a hypothesis different form thermohaline circulation and upwelling is proposed here： there would be a periodi- cal hydrothermal fluid system in the eastern Paleotethys Ocean, providing the source of silica for the development of Permian Chert Event on both south and north continent shelves. What is more, some intensively studied Permian outcrops in the Yangtze areas have the potential to be the typical outcrops for PCE research in China.