洞子沟地区大红峪组富钾火山岩岩石学、地球化学特征

Petrological and Geochemical Research on Dahongyu Ultra-potassic Volcanic rocks in Dongzigou Area,Hebei Province

从矿物学、岩石学、地球化学等角度对大红峪组火山岩特征进行了详细研究,认为大红峪组火山岩为一套特殊的超钾质火山岩,形成于夭折的大陆裂谷环境,成岩物质来源于上地幔,同时混染了部分下地壳物质,这也是岩石富钾的原因。

Based on the study of the mineralogy, petrology and geochemistry, the author suggested that Dahongyu volcanic rock is a special ultra-potassic association. It formed in the continental rift setting that aborted shortly after the beginning. The rock-forming materials came from upper-mantle and contaminated the under crust material, which is also the reason of its high potassium.