I/(Ca+Mg)as an important redox proxy for carbonate sedimentary environments: Progress and problems
Shang Mo-Han, Tang Dong-Jie, Shi Xiao-Ying, Wei Hao-Ming, Liu An-Qi
JOPC . 2018, (4): 651 -664 .  DOI: 10.7605/gdlxb.2018.04.047