Broadband Onshore-offshore Lithospheric Investigation of Venezuela and the Antilles arc Region (BOLIVAR)


deployment map

Alan Levander
John Collins
Fenglin Niu
Colin Zelt
Hans Ave Lallemant
Adrian Lenardic


EOS Article

Experiment Website

Cruise Report

JGR Paper

Active source OBS are in white circles and broadband are white hexagons.

Experiment Summary

(Taken from NSF Abstract #0003572): This is a project to study the Caribbean-South American oblique arc-continent collision zone using various geologic (mapping, structure), geochemical (Ar-Ar and U-Pb Geochronology), and seismic (active MCS with onshore/offshore recording using OBS instruments, passive array) techniques. There will also be a geodynamic modeling study that, very innovatively, includes the dynamics of crust-mantle interaction. The overall goal of the project is to understand further the geometry and chronology of a world class, arc-continent accretion event. Seosmic/geological cross-sections are to be derived for several transects across the orogen at different ages of collision. The group of investigators include highly capable seismologists in both active and passive seismology, as well as geologists familiar with the orogenic developments on land. The cooperation with Venezuelan scientists and students is excellent. 


4/18/2004 - 6/3/2004

15 SIO broadband OBS and 114 WHOI short-period OBS were deployed and recovered with the R/V Ewing [EW0404]. Four SIO broadband OBS (DAQI, MTAI, RRNR, ZOMB) had no usable data.


Data from all instruments deployed are archived under network code XT at the IRIS DMC.