Trace element compositions of volcanic rocks from Yangba Formation, Bikou Group, Qinling, China: Implications for tectonics
Institution:
DING Zhenju~(1,2) and LlU Congqiang~1 1. Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550002, China; 2. China University of Ceosciences, Wuhan 430074, China