Fifty‐five‐million‐year history of oceanic subduction and exhumation at the northern edge of the Caribbean plate (Sierra del Convento mélange, Cuba)
Fifty‐five‐million‐year history of oceanic subduction and exhumation at the northern edge of the Caribbean plate (Sierra del Convento mélange, Cuba)
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加勒比板块北缘5500万年海洋俯冲和折返历史(古巴Sierra del Convento mélange)
DOI:
10.1111/j.1525-1314.2008.00800.x
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发表时间:
2009
影响因子:
3.4
通讯作者:
Turralde-Vinent
中科院分区:
文献类型:
--
作者:
Lázaro;García-Casco;Rojas-Agramonte;Kröner;Neubauer;Turralde-Vinent
Petrological and geochronological data of six representative samples of exotic blocks of amphibolite and associated tonalite‐trondhjemite from the serpentinitic mélange of the Sierra del Convento (eastern Cuba) indicate counterclockwiseP–Tpaths typical of material subducted in hot and young subduction zones. Peak conditions attained were ∼750 °C and 15 kbar, consistent with the generation of tonalitic partial melts observed in amphibolite. A tonalite boulder provides a U‐Pb zircon crystallization age of 112.8 ± 1.1 Ma, and Ar/Ar amphibole dating yielded two groups of cooling ages of 106–97 Ma (interpreted as cooling of metamorphic/magmatic pargasite) and 87–83 Ma (interpreted as growth/cooling of retrograde overprints). These geochronological data, in combination with other published data, allow the following history of subduction and exhumation to be established in the region: (i) a stage of hot subduction 120–115 Ma, developed upon onset of subduction; (ii) relatively fast near‐isobaric cooling (25 °C Myr−1) 115–107 Ma, after accretion of the blocks to the upper plate lithospheric mantle; (iii) slow syn‐subduction cooling (4 °C Myr−1) and exhumation (0.7 km Myr−1) in the subduction channel 107–70 Ma; and (iv) fast syn‐collision cooling (74 °C Myr−1) and exhumation (5 km Myr−1) 70–60 Ma.
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影响因子:
2.6
作者:
M. Somin;M. M. Arakelyants;E. Kolesnikov
通讯作者:
E. Kolesnikov
影响因子:
3.4
作者:
S. Wallis;Y. Moriyama;T. Tagami
通讯作者:
T. Tagami
影响因子:
3.9
作者:
J. Pindell
通讯作者:
J. Pindell
影响因子:
2.7
作者:
U. Ring;T. Reischmann
通讯作者:
T. Reischmann
影响因子:
3.9
作者:
A. Garcia‐Casco;C. Lázaro;Y. Rojas‐Agramonte;A. Kröner;R. Torres-Roldán;Kenya Núñez;F. Neubauer;G. Millán;I. Blanco-Quintero
通讯作者:
A. Garcia‐Casco;C. Lázaro;Y. Rojas‐Agramonte;A. Kröner;R. Torres-Roldán;Kenya Núñez;F. Neubauer;G. Millán;I. Blanco-Quintero