2017 36 (2):  333-345    ISSN: 1004-5589:  CN: 22-1111/P Petrological and geochemical characteristics of mudstone from the 2nd and 3rd Members of Qingshankou Formation near Hada Mountain in southern Songliao Basin SUN Xiao, LIU Li, LIU Na, MING Xiao-ran College of Earth Sciences, Jilin University, Changchun 130061, China Received 2016-12-22  Revised 2017-02-13  Online 2017-06-25 Reference   Corresponding author: