Ma et.al major oxides of hornblende and plagioclase method v.1

EMPA methods for mineral compositions of plagioclase and hornblende grains. The major elements of plagioclase and hornblende grains were measured using Electron Microprobe at Key Laboratory of Continental Tectonics and Dynamics of the Ministry of Natural Resources, Institute of Geology, Chinese Academy of Geological Sciences, Beijing 100037, China.