Petrología estructural y mineralogía mantélica de la Peridotita de Loma Caribe, Cordillera Central, República Dominicana
- Javier Escuder-Viruete 1
- Mercedes Castillo Carrión 1
- Álvaro Rubio Ordóñez 2
- Francisco José Fernández 2
- Fernando Pérez Valera 3
- Javier Escuder-Magallón 1
- Pablo Valverde Vaquero 1
- 1 Instituto Geológico y Minero España - CSIC, Madrid
- 2 Departamento de Geología, Universidad de Oviedo. Oviedo
- 3 Departamento de Ciencias de la Tierra y del Medio Ambiente, Universidad de Alicante. Sant Vicent de Raspeig
ISSN: 0213-683X
Ano de publicación: 2023
Número: 74
Páxinas: 35-38
Tipo: Artigo
Outras publicacións en: Geogaceta
Resumo
The Loma Caribe Peridotite (LCP) consists of granular and porphyroclastic peridotites, (GP and PCP, respectively). GP developed high-T ductile foliations during the mantle upwelling beneath the spreading ridge and the subsequent crust-mantle shear as the lithosphere migrated away from the ridge. However, the porphyroclastic to mylonitic foliations present in the PCP, as well as those present in the overlying foliated serpentinites, are related to tectonic exhumation and denudation of the mantle. The LCP mantle is composed mainly of depleted harzburgites grading to Cpx-rich harzburgites and lherzolites, with mineral compositions similar to those of fore-arc peridotites. By comparation with experimental data, variations in modal proportions and mineral chemistry are consistent with 26-38% and 12-44% partial melting for PG and PPC, respectively.