石油与天然气地质 ›› 1986, Vol. 7 ›› Issue (2): 171-174.doi: 10.11743/ogg19860211

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安徽巢县下二叠统硅质岩的成因

孔庆玉, 龚与觐   

  1. 华东石油地质研究大队
  • 收稿日期:1985-05-21 修回日期:1985-09-13 出版日期:1986-06-25 发布日期:2012-01-16

ORIGIN OF THE LOWER PERMIAN SILICEOUS ROCKS IN CHAOXIAN COUNTY,ANHUI

Kong Qingyu, Gong Yujin   

  1. Comprehensive Research Institute of Petroleum Geology, Huadong Petroleum Administration
  • Received:1985-05-21 Revised:1985-09-13 Online:1986-06-25 Published:2012-01-16

PDF (PC)

720

被引次数

9

摘要：

通过下扬子区皖北巢县平顶山、龟山下二叠统硅质岩的研究,表明栖霞阶中与碳酸盐岩共生的硅质岩,是碳酸盐岩在成岩演变过程中,由沉积水和地层水中的 SiO2沉淀交代和充填形成。不同时期形成的硅质岩其产状和结构特征各不相同。孤峰组中与泥岩、页岩共生的硅质岩是生物成因的。它们直接由海水中硅质生物——放射虫和硅质海绵的遗体堆积而成,形成的决定因素是海水中硅质生物的含量与海水性质。

Abstract:

The study of the Lower Permian rocks from Pingdingshan,Guishan in Chaoxian of the north Anhui Province within the Lower Yangze area shows that siliceous rocks associated with carbonate rocks in Qixia stage were formed by the precipition,replacement and filling of SiO2 from both deposition and formation water during the diagenetic evolution of carbonate rocks.The occurrence and fabric characteristics of siliceous rocks formed in different peroid are various.Siliceous rocks associated with mudstones and shales in the Cufeng Formation were originated from organisms,directly forming by the accumulation of the remains of siliceous organisms,radiolarians and siliceous sponges in sea water.The contents of siliceous organisms in sea water and the properties of sea water were decisive factors for the formation of these siliceous rocks.