|Other Titles||The experiment of broad band I-4C type OBS in the Southwest India ridge|
Southwest Indian Ridge
Five I-4C type broad band ocean bottom seismometer (OBS) made by the Institute of Geology and Geophysics, CAS together with other OBSs were used in the survey of Southwest India Ridge during the sixth section of DY115-21 cruise. This paper describes in detail the experiment process of the five I-4C type broad band OBS. These five OBS were deployed 6 times in various water depth sites(2370-3534 m) and all recovered successfully. The inner electrical and chemical releasing system and the extra added mechanical releasing system both operated successfully. Seismic data of mid ridge produced by air gun array was recored. But the experiment showed this type OBS still exists some faults as follows. (1) The GPS locating and receiving system used for seeking floated OBS on sea surface was invalid; (2) The light from OBS was too weak to seek floated OBS during night; (3) The outer structure of OBS was not convenient for cathing OBS from water due to its bad floating pose.
|Appears in Collections:||地球与空间科学学院|