Both the picrite and komatiite are Mg-rich ultramafic volcanic rocks. In the past, most of the academic community paid attention to the similarities between picrite and komatiite, but the differences of them were little concerned. So these scholars considered that picrite and komatiite were similar in geochemical properties, origin, and forming conditions. In my study, the method of whole data has been adopted to analyze the differences between the Picrite and Komatite through the global database. However, the result of the research shows that there are almost no comparisons between picrite and komatite. Picrite and Komatiite are not only different from the geochemical characteristics, but also from their genesis, forming conditions, age, and composition of the source region as well. Since the Archaean was the fireball era and the earth’s extremely hot, the dominant structure might be stagnant lid tectonics. In Post-Archean era, the earth was relatively cold and dominated by plate tectonics. The komatiite is plentifully exposed in the age of Archean, so it is no need for the mantle plume model. On the contrary, the picrite is rarely seen in the Post-Archean and it needs this model.
Luo Ying Yuan Fanglin Jin Weijun Liu Xuelong Zhang Changzhen Liu Xinyu Zhang Qi Yu Haijun. The comparison of global picirte and Archean komatiite: implications from the whole data model[J]. Chinese Journal of Geology, 2018, 53(4): 1267-1284.