Key;
Laboratory;
of;
Marine;
Geology;
and;
Environment,;
Institute;
of;
Oceanology,;
Chinese;
Academy;
of;
Sciences,;
Qingdao;
266071;
China;
Graduate;
University;
of;
Chinese;
Academy;
of;
Sciences,;
Beijing;
100049,;
China;
China;
University;
of;
Petroleum,;
Qingdao;
266555,;
China;
CNOOC;
Research;
Center,;
Beijing;
100027,;
China;