Key Laboratory of Deep-Earth Dynamics of the Ministry of Natural Resources;
Institute of Geology;
Chinese Academy of Geological Sciences;
Beijing 100037;
China;
School of Earth and Space Sciences;
Peking University;
Beijing 100871;
China;
Comprehensive Exploration Technology Center;
Shandong Coal Field Geological Survey and Research Institute;
Jinan 250104;
China;
Tianjin Center;
China Geological Survey;
Tianjin 300170;
China;
uvarovite; serpentinite; rodingite; chromium migration; oceanic subduction zone;