北京西山地区下苇甸剖面寒武系张夏组鲕粒硅化成因探讨*
郭芪恒, 金振奎, 朱雷, 朱小二, 王金艺, 吴进, 李思澎

Mechanism for silicification of ooid:Example from the Cambrian Zhangxia Formation at Xiaweidian section in Western Hills of Beijing
Guo Qi-Heng, Jin Zhen-Kui, Zhu Lei, Zhu Xiao-Er, Wang Jin-Yi, Wu Jin, Li Si-Peng
北京西山地区下苇甸剖面寒武系张夏组显微照片特征
a—灰绿色泥岩,单偏光,含有较多石英颗粒;b—富硅质层,正交偏光,与鲕粒灰岩互层;c—灰泥石灰岩,正交偏光,可见平行分布的3条富硅质条带(红色箭头所指);d—缝合线,单偏光,缝合线内富集有机质,有机质附近硅化现象明显(红色箭头所指)