Key;
Laboratory;
for;
Mineral;
Deposits;
Research,;
School;
of;
Earth;
Sciences;
and;
Engineering,;
Nanjing;
University,;
Nanjing;
210093,;
China;
ARC;
National;
Key;
Centre,;
Department;
of;
Earth;
and;
Planetary;
Sciences,;
Macquarie;
University,;
Sydney,;
N.S.;
W.;
2109,;
Australia;