燕山中段（主要是指北京市平谷县内）大红峪组火山岩，在火山活动的间歇期，存在古风化现象，古风化使火山岩的成分、结构遭受改变，以致影响对......

This study presents a geochemical investigation of Tikak Parbat and Tipam Sandstone Formations occurring in and around D......

The Paleoproterozoic Aravalli Supregroup of rocks, hosted in Aravalli Craton of NW shield, is deposited in shallow and d......