摘要
对矿区硅质岩样品做了硅、氧同位素测定,其δ^(30)Si值为0.4‰～1.7‰;成岩流体水的δ^(18)O值为-2.7‰～+1.1‰.根据地球化学特征和硅、氧同位素分析,提出硅质岩为浅海和半深海热水沉积.
Oxygen and silicon isotope composition of the silicalites in Huangchang realgar ore district are analysed. The calculated δ18O values of the fluid associated with the silicalites are - 2.7‰ -+1. 1‰, indicating a dominate warm seawater. While δ30.Si values of the silicalites are 0. 4‰ - 1.7‰ reflecting an epicontinental or bathyal sea environment. Therefore, the silicalites of this ore district dominated by the warm seawater are the product of cogenetic and subcogenetic deposition in the epicontinental or bathyal sea environment.
出处
《华南地质与矿产》
CAS
1997年第2期51-53,共3页
Geology and Mineral Resources of South China
关键词
硅质岩
硅
氧
同位素地球化学
热水沉积
silicalites silicon and oxygen isotope deposition of warm water
