HR: 1340h
AN: T53B-1313    [Abstracts]
TI: Hydrothermal plume anomalies recorded during a 2007 Chinese cruise to the Indian Ocean
AU: * Wang, T
EM: wdt1204@gmail.com
AF: Department of Geophysics,School of Earth and Space Sciences, Peking University, Beijing, 100871, China
AU: Chen, Y J
EM: johnyc@pku.edu.cn
AF: Department of Geophysics,School of Earth and Space Sciences, Peking University, Beijing, 100871, China
AU: Tao, C
EM: taochunhuimai@163.com
AF: Second Institute of Oceanography, State Oceanic Administration, No.36,Baoshu North Road, Hangzhou, 310012, China
AU: Han, X
EM: xiqiuhan@tom.com
AF: Second Institute of Oceanography, State Oceanic Administration, No.36,Baoshu North Road, Hangzhou, 310012, China
AU: Baker, E
EM: Edward.Baker@noaa.gov
AF: Pacific Marine Environmental Laboratory, National Oceanic and Atmospheric Administration,Seattle, Washington, 98115, United States
AB: During January-May 2007 three legs of the Chinese research cruise DY115-19 have been carried out in the Indian Ocean on board the Chinese R/V ¡°Dayang Yihao¡± to investigate hydrothermal vents at mid-ocean ridges and to explore their mineral deposits. The cruise aimed to find new hydrothermal plumes that will lead to the discovery of new hydrothermal vent fields. Here we report observations of the Miniature Autonomous Plume Recorders (MAPRs), which were attached to the tow cables at designed water depths and have been proven to be a very effective tool for finding new hydrothermal plumes. At the SEIR near the St. Paul/Amsterdam plume we detected a similar hydrothermal anomaly, which was reported at the same location about ten years ago. The most significant hydrothermal plume anomalies were observed at the ultra-slow spreading Southwest Indian Ridge, where the largest turbidity readings were about 100 times the reported readings of a regular MAPR anomaly along mid- ocean ridges and up to 0.12¡ãC temperature anomalies were also recorded by MAPRs. These observations play an important role in locating the new discovered hydrothermal vents at the site. A new hydrothermal plume anomaly was also detected near the vent site of Kairei at the Central Indian Ridge.
DE: 3017 Hydrothermal systems (0450, 1034, 3616, 4832, 8135, 8424)
DE: 3035 Midocean ridge processes
DE: 3045 Seafloor morphology, geology, and geophysics
SC: Tectonophysics [T]
MN: 2007 Fall Meeting