胶东半岛中生代基性脉岩岩石成因:揭示华北克拉通东部岩石圈地幔演化过程

Key Points

• Basaltic dikes formed between 136 to 103 million years ago indicate high potassium and alkaline characteristics with significant MgO content.
• Geochemical analysis suggests these dikes originated from a depleted lithospheric mantle undergoing low-degree partial melting.
• Study employs regional geochronology and rock geochemical characterization to uncover characteristics of basaltic dikes in gold mineralization zones.
• Results indicate that subduction of the ancient Pacific Plate has led to significant thermal erosion of the eastern North China Craton's lithospheric mantle.

Abstract