CLIP – Origin of the Caribbean Large Igneous Province (CLIP) in connection with the geodynamic evolution of the Central Caribbean : [METEOR] Cruise No. 81, Leg 2A/B, March 11 – April 21, 2010 Port of Spain (Trinidad and Tobago) – Willemstad (Netherlands Antilles) – Bridgetown (Barbados)
Werner, Reinhard, Hoernle, Kaj and Hauff, Folkmar, eds and IFM-GEOMAR, Senatskommission für Ozeanographie der Deutschen Forschungsgemeinschaft , MARUM - Zentrum für Marine Umweltwissenschaften der Universität Bremen. (2011) CLIP – Origin of the Caribbean Large Igneous Province (CLIP) in connection with the geodynamic evolution of the Central Caribbean : [METEOR] Cruise No. 81, Leg 2A/B, March 11 – April 21, 2010 Port of Spain (Trinidad and Tobago) – Willemstad (Netherlands Antilles) – Bridgetown (Barbados) Meteor-Berichte, 11-8 . Leitstelle Deutsche Forschungsschiffe, Institut für Meereskunde der Universität Hamburg, Hamburg, 48, 78 pp.
Fahrtbericht_M81-2A_B.pdf - Published Version
The main purpose of R/V METEOR cruise M81/2AB was to obtain new insights into the
controversially discussed origin and geodynamic evolution of the Caribbean Large Igneous
Province (CLIP) and the Caribbean Plate using an interdisciplinary approach combining
structural geology, geodynamics, magnetics, volcanology, sedimentology, petrology, magmatic
geochemistry and geochronology. The rock sampling on M81/2AB achieved its major objectives
through successful 1) stratigrafically-controlled sampling of a complete basement section of the
northern Beata Rise with Kiel 6000 ROV (remote operated vehicle), 2) extensive dredge
sampling of the southern Beata Rise, and 3) the first representative hard rock sampling of the
Hess-Escarpment region. The wide range of intrusive, volcanic and sedimentary rocks recovered
on M81/2AB represents the most detailed marine sampling of the CLIP and associated features
to date. SIMRAD EM120 and PARASOUND were used to select sampling stations and to assess
the structural geology of the region. Multi-beam seafloor mapping and preliminary analyses of
the recovered samples suggest large-scale tectonic movements of the Beata Rise and the area
north of the Hess-Escarpment and a volcanic rather than continental origin for the Nicaragua
Rise north of the Hess-Escarpment. The magnetic studies were also highly successful with more
than 7,300 km of magnetic profiles being acquired. Magnetic anomalies measured on four
parallel profiles in the Colombia Basin suggest that the crust is oceanic, but seafloor spreading
anomalies could not be correlated. Along the Hess Escarpment high amplitude magnetic
anomalies associated with morphological features indicate a volcanic origin and basaltic
composition of the crust, consistent with the seafloor morphology and recovered samples.
|Document Type:||Report (Cruise Report)|
|Keywords:||Geodynamics; Caribbean Large Igneous Province ; CLIP ; M81/2AB ; magnetics ; micropalaeontology ; carbonates ; magmatic geochemistry ; geochronology ; bathymetry|
|Research affiliation:||OceanRep > GEOMAR > FB4 Dynamics of the Ocean Floor > FB4-MUHS Magmatic and Hydrothermal Systems|
|Date Deposited:||13 Mar 2012 11:56|
|Last Modified:||06 Jul 2012 15:11|
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