Plattform Platform	Reise-Nr. Cruise-No.	Zeitraum Period	Projekt Project	Arbeitsgebiet Working area
Sonne1	SO233	14.05.2014 - 21.06.2014	SO233-WALVIS	SE Atlantic (Limit 20?W)

Fahrtleiter Chief Scientist	Institut Institute	Auslaufhafen Port of departure	Einlaufhafen Port of return	Stationskarte Station map	Schiffsroute Trackchart
Hoernle K.A.	Helmholtz Centre for Ocean Research Kiel (GEOMAR)	Cape Town	Walvis Bay

Ziel der Reise / Objectives of Cruise:

Cruise SO-233 comprised petrological, volcanological, geochemical, geochronological, and biological studies in the area of the aseismic Walvis Ridge and the adjacent ocean floor. The Walvis Ridge is a textbook example of a hotspot track connected to a continental flood basalt province and represents the Atlantic "type locality" for the enriched mantle one (EM-I) geochemical endmember in intraplate volcanic rocks. The geological studies carried out during SO-233 included multi-beam mapping using a SIMRAD EM 120 echo sounding system, sediment echo sounding using a ATLAS PARASOUND sub-bottom profiling system, and hard rock sampling by dredging and TV-grab. The major targets of the cruise are (1) to test for age progressive volcanism along the ridge, (2) to differentiate between classical hotspot and plate fracturing models for its formation, and (3) to constrain the origin and temporal and spatial evolution of melting conditions and source compositions (in particular for the EM-I endmember and for zonation of mantle plumes). Scientists from the ?Museum fur Naturkunde Berlin", Germany, conducted the biological part of the research project using TV-multi corer, TV-grab, and sediment traps installed in the geological dredges. The biology program intended to describe the benthic diversity of deep-sea invertebrates of the Walvis Ridge and will help to identify proxies of species connectivity and dispersal between the Walvis Ridge and neighboring ridge like structures (e.g., Agulhas Ridge, cruise MSM19/3).

Messungen / Measurements