Ar and U-Th-Pb age determinations for minerals from ODP Holes of ODP Legs 173 and 210
| Cobertura |
MEDIAN LATITUDE: 42.011125 * MEDIAN LONGITUDE: -21.312290 * SOUTH-BOUND LATITUDE: 40.682500 * WEST-BOUND LONGITUDE: -44.376667 * NORTH-BOUND LATITUDE: 45.196667 * EAST-BOUND LONGITUDE: -11.595830 * DATE/TIME START: 1997-05-01T22:45:00 * DATE/TIME END: 2003-09-04T00:00:00 |
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| Data(s) |
25/06/2007
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| Resumo |
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. |
| Formato |
application/zip, 7 datasets |
| Identificador |
https://doi.pangaea.de/10.1594/PANGAEA.722550 doi:10.1594/PANGAEA.722550 |
| Idioma(s) |
en |
| Publicador |
PANGAEA |
| Relação |
Analytical techniques - supplement material (Table 1, Table 2) (URI: ftp://rock.geosociety.org/pub/reposit/2007/2007270.pdf) |
| Direitos |
CC-BY: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted |
| Fonte |
Supplement to: Jagoutz, Oliver; Müntener, Othmar; Manatschal, Gianreto; Rubatto, Daniela; Péron-Pinvidic, Gwenn; Turrin, Brent D; Villa, Igor M (2007): The rift-to-drift transition in the North Atlantic: A stuttering start of the MORB machine? Geology, 35(12), 1087-1090, doi:10.1130/G23613A.1 |
| Palavras-Chave | #173-1067A; 173-1068A; 173-1069A; 173-1070; 173-1070A; 1 sigma; 206Pb/238U; 206Pb/238U e; 207Pb/206Pb; 207Pb/206Pb e; 210-1277; 2 sigma; 36Ar; 36Ar/39Ar; 37Ar/39Ar; 38Ar/39Ar; 39Ar; 40Ar; 40Ar_rad/39Ar; 40Ar/36Ar; 40Ar/36Ar std dev; 40Ar/39Ar; Age, 40Ar/39Ar Argon-Argon; Age, comment; Age, dated; Age, dated material; Age, dated standard deviation; Age, error; Age dated; Age e; Age std dev; Argon 36; Argon 36/Argon 39; Argon 37/Argon 39; Argon 38/Argon 39; Argon 39; Argon 40; Argon 40/Argon 36; Argon 40/Argon 36, standard deviation; Argon 40/Argon 39; C34; Ca/K; Calcium/Potassium ratio; Calculated; Comm; COMPCORE; Composite Core; Dated material; Depth; DEPTH, sediment/rock; DRILL; Drilling/drill rig; Energy; Energy, work, quantity of heat; error; for total, 1 sigma; from 206Pb/238U; from 206Pb/238U, 1 sigma; from Ca; from K; initial; Ion microprobe; isochron age; Joides Resolution; Label 2; Lead; Lead 206/Uranium 238; Lead 206/Uranium 238, error; Lead 207/Lead 206, error; Lead 207/Lead 206 ratio; Leg173; Leg210; n-Alkane C34; North Atlantic Ocean; Ocean Drilling Program; ODP; ODP sample designation; of isochron age; of plateau age; of total fusion age; Pb; plateau age; Power; Power, radiant flux; radiogenic; Samp com; Sample code/label; Sample code/label 2; Sample comment; Th; Th/U; Thorium; Thorium/Uranium ratio; total; total fusion age; U; Uranium |
| Tipo |
Dataset |
