Caribbean Plate margin evolution: constraints and current problems
Fuente:
Redalyc
Saved in:
| Main Author: | |
|---|---|
| Format: | Artículo científico |
| Language: | en |
| Published: |
Universitat de Barcelona
2006
|
| Subjects: | |
| Online Access: | |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1876433599725568000 |
|---|---|
| author | G. Giunta |
| author_facet | G. Giunta |
| contents | Caribbean Plate margin evolution: constraints and current problems G. Giunta L. Beccaluva F. Siena Ciencias de la Tierra Plate Tectono Ophiolites Caribbean Plate tectonic models Oceanic crust was generated at multiple spreading centres during the Jurassic and Early Cretaceous, forming aproto-Caribbean oceanic domain. During the Cretaceous, part of that crustal domain thickened into an oceanicplateau, of petrologic Mid-Ocean Ridge (MOR) to Ocean Island Basalt (OIB) affinity. Simultaneously, theSouth and North American continental plates developed rifting and tholeiitic magmatism in the Middle Americaregion (Venezuela and Cuba). The rifting created space for the proto-Caribbean oceanic domain. Petrologicaland regional correlations suggest that, beginning in the Cretaceous, the proto-Caribbean domain was involvedinto two main stages of subduction, referred to as first and second eo-Caribbean phases. Each phase is characterizedby oblique convergence. The older (mid-Cretaceous) stage, involved in subduction (probably eastwarddipping) of thin proto-Caribbean lithosphere, with generation of Island Arc Tholeiitic (IAT) and Calc-Alkaline(CA) magmatism, accompanied by high pressure - low temperature (HP - LT) metamorphic effects, and formationof arc units and ophiolitic melanges (Guatemala, Cuba, Hispaniola and Puerto Rico, in the northern margin;Venezuela in the southern). The Late Cretaceous second stage consisted of westward dipping intra-oceanic subduction;it is recorded by tonalitic arc magmatism related to the onset of the Aves - Lesser Antilles arc system.Since the Late Cretaceous, the inner undeformed portions of the Caribbean oceanic plateau (i.e. the Colombianand Venezuelan Basins) were trapped east of the Pacific subduction of the Chortis, Chorotega and Chocoblocks, ultimately building the Central American Isthmus. From Tertiary to Present, continuous eastward movementof the Caribbean Plate with respect to the Americas, gave rise to transpression along both the northern andsouthern margins, marked by scattered and dismembered ophiolitic terranes. 2006 artículo científico 1695-6133 https://www.redalyc.org/articulo.oa?id=50540215 en http://www.redalyc.org/revista.oa?id=505 Geologica Acta: an international earth science journal application/pdf Universitat de Barcelona Geologica Acta: an international earth science journal (España) Num.1-2 Vol.4 |
| format | Artículo científico |
| id | redalyc_50540215 |
| institution | Redalyc |
| language | en |
| publishDate | 2006 |
| publisher | Universitat de Barcelona |
| spellingShingle | Caribbean Plate margin evolution: constraints and current problems G. Giunta Ciencias de la Tierra Plate Tectono Ophiolites Caribbean Plate tectonic models Caribbean Plate margin evolution: constraints and current problems G. Giunta L. Beccaluva F. Siena Ciencias de la Tierra Plate Tectono Ophiolites Caribbean Plate tectonic models Oceanic crust was generated at multiple spreading centres during the Jurassic and Early Cretaceous, forming aproto-Caribbean oceanic domain. During the Cretaceous, part of that crustal domain thickened into an oceanicplateau, of petrologic Mid-Ocean Ridge (MOR) to Ocean Island Basalt (OIB) affinity. Simultaneously, theSouth and North American continental plates developed rifting and tholeiitic magmatism in the Middle Americaregion (Venezuela and Cuba). The rifting created space for the proto-Caribbean oceanic domain. Petrologicaland regional correlations suggest that, beginning in the Cretaceous, the proto-Caribbean domain was involvedinto two main stages of subduction, referred to as first and second eo-Caribbean phases. Each phase is characterizedby oblique convergence. The older (mid-Cretaceous) stage, involved in subduction (probably eastwarddipping) of thin proto-Caribbean lithosphere, with generation of Island Arc Tholeiitic (IAT) and Calc-Alkaline(CA) magmatism, accompanied by high pressure - low temperature (HP - LT) metamorphic effects, and formationof arc units and ophiolitic melanges (Guatemala, Cuba, Hispaniola and Puerto Rico, in the northern margin;Venezuela in the southern). The Late Cretaceous second stage consisted of westward dipping intra-oceanic subduction;it is recorded by tonalitic arc magmatism related to the onset of the Aves - Lesser Antilles arc system.Since the Late Cretaceous, the inner undeformed portions of the Caribbean oceanic plateau (i.e. the Colombianand Venezuelan Basins) were trapped east of the Pacific subduction of the Chortis, Chorotega and Chocoblocks, ultimately building the Central American Isthmus. From Tertiary to Present, continuous eastward movementof the Caribbean Plate with respect to the Americas, gave rise to transpression along both the northern andsouthern margins, marked by scattered and dismembered ophiolitic terranes. 2006 artículo científico 1695-6133 https://www.redalyc.org/articulo.oa?id=50540215 en http://www.redalyc.org/revista.oa?id=505 Geologica Acta: an international earth science journal application/pdf Universitat de Barcelona Geologica Acta: an international earth science journal (España) Num.1-2 Vol.4 |
| title | Caribbean Plate margin evolution: constraints and current problems |
| topic | Ciencias de la Tierra Plate Tectono Ophiolites Caribbean Plate tectonic models |
| url | https://www.redalyc.org/articulo.oa?id=50540215 |