中下扬子北缘中二叠统孤峰组层状硅质岩沉积环境、成因及硅质来源探讨

赵振洋, 李双建, 王根厚

Discussion on Sedimentary Environments,Origin and Source of Middle Permian Gufeng Formation Bedded Cherts in theNorthern Margin of the Middle-Lower Yangtze Area

Zhenyang Zhao, Shuangjian Li, Genhou Wang

图3 硅质岩成因判别图解 (a) Al-Fe-Mn图解[59]（热液及非热液成因分区界线引自参考文献[43]）；（b）硅质岩稀土元素页岩标准化配分模式图[13,14,15]（页岩标准化值引自北美页岩组合样（NASC）引自参考文献[13,14,15]）

Fig. 3 Diagrams to Identify the Genesis of Cherts (a) Al-Fe-Mn diagram of cherts[59] (hydrothermal curve and non-hydrothermal curve are after reference [43]); (b)Shale-normalized REE distribution patterns of cherts[13,14,15] [normalization values are from North American Shale Composite(NASC),after references[13~15]]