Ar and U-Th-Pb age determinations for minerals from ODP Holes of ODP Legs 173 and 210

We report U-Pb and 39Ar-40Ar measurements on plutonic rocks recovered from the Ocean Drilling Program (ODP) Legs 173 and 210. Drilling revealed continental crust (Sites 1067 and 1069) and exhumed mantle (Sites 1070 and 1068) along the Iberia margin and exhumed mantle (Site 1277) on the conjugate Newfoundland margin. Our data record a complex igneous and thermal history related to the transition from rifting to seafloor spreading. The results show that the rift-to-drift transition is marked by a stuttering start of MORB-type magmatic activity. Subsequent to initial alkaline magmatism, localized mid-oceanic ridge basalts (MORB) magmatism was again replaced by basin-wide alkaline events, caused by a low degree of decompression melting due to tectonic delocalization of deformation. Such "off-axis" magmatism might be a common process in (ultra-) slow oceanic spreading systems, where "magmatic" and "tectonic" spreading varies in both space and time.

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Jagoutz, Oliver, Müntener, Othmar, Manatschal, Gianreto, Rubatto, Daniela, Péron-Pinvidic, Gwenn, Turrin, Brent D, Villa, Igor M (2007). Dataset: Ar and U-Th-Pb age determinations for minerals from ODP Holes of ODP Legs 173 and 210. https://doi.org/10.1594/PANGAEA.722550

DOI retrieved: 2007

Additional Info

Field Value
Imported on November 30, 2024
Last update November 30, 2024
License CC-BY-3.0
Source https://doi.org/10.1594/PANGAEA.722550
Author Jagoutz, Oliver
Given Name Oliver
Family Name Jagoutz
More Authors
Müntener, Othmar
Manatschal, Gianreto
Rubatto, Daniela
Péron-Pinvidic, Gwenn
Turrin, Brent D
Villa, Igor M
Source Creation 2007
Publication Year 2007
Resource Type application/zip - filename: Jagoutz_2007
Subject Areas
Name: Lithosphere

Related Identifiers
Title: The rift-to-drift transition in the North Atlantic: A stuttering start of the MORB machine?
Identifier: https://doi.org/10.1130/G23613A.1
Type: DOI
Relation: IsSupplementTo
Year: 2007
Source: Geology
Authors: Jagoutz Oliver , Müntener Othmar , Manatschal Gianreto , Rubatto Daniela , Péron-Pinvidic Gwenn , Turrin Brent D , Villa Igor M .

Title: Analytical techniques - supplement material (Table 1, Table 2)
Identifier: ftp://rock.geosociety.org/pub/reposit/2007/2007270.pdf
Type: DOI
Relation: References