Guangzhou Institute of Geochemistry;
Chinese Academy of Sciences;
Guangzhou;
GD 510640;
China Guangzhou Institute of Geochemistry;
Chinese Academy of Sciences;
Guangzhou;
GD 510640;
China Guangzhou Institute of Geochemistry;
Chinese Academy of Sciences;
Guangzhou;
GD 510640;
China Guangzhou Institute of Geochemistry;
Chinese Academy of Sciences;
Guangzhou;
GD 510640;
China;
Tianmenshan; the; boundary; between; Sinian/Cambrian; microtektite; meteoritic; fragment; extraterrestrial; impact; event;