2017 36 (2):  452-459    ISSN: 1004-5589:  CN: 22-1111/P Geochemical characteristics and their geological significance of Permian bimodal volcanic rocks in Panzhihua, Sichuan ZHU Liang, XI Ai-hua, WANG Wan-qiong, ZHONG Xiang, WU Yao-ye College of Earth Sciences & Technology, Southwest Petroleum University, Chengdu 610500, China Received 2017-03-03  Revised 2017-04-25  Online 2017-06-25 Reference   Corresponding author: