PI Country:
China
PIs:
J. Li
Institution:
Second Institute of Oceanography, SOA, Hangzhou, China
Funding:
COMRA
Ocean:
Indian
Region:
SWIR
Year:
2010
Start Date:
31 January 2010
End Date:
7 March 2010
Website URL:
http://www.interridge.org/en/node/6021 The most important scientific questions this 3-D active source seismic experiment will address are the crustal structure at this ridge segment with a strong focus on imaging a potential magma chamber in the crust, and looking for any slow velocity anomalies beneath the Moho, an indication of melt body in the uppermost mantle.
Ship:
R/V Dayang Yihao
Equipment:
An active source, 3-D seismic (refraction/wide angle reflection) experiment was completed at the ultra-slow spreading Southwest Indian Ridge. An array of four air guns (1500 cubic inch each) was shot along total of 40 near east-west and north-south lines at an interval of 100-120 seconds with a ship speed of 4.5-4.9 knots. The total of 10,832 shots within the 13 days of air gun shooting should provide enough seismic source and path coverage for a 3-D tomographic inversion of these two study areas to a depth of 20 km. 
