Petrogenesis of the chromitite body from the Cerro Colorado ophiolite, Paraguaná Peninsula,  Venezuela

Ultramafic-mafic rocks of ophiolitic affinity crop out along the Venezuelan Caribbean region. They have been interpreted as remnants of the oceanic lithosphere of the Caribbean volcanic arc (135-70 Ma) as well as relicts of proto-Caribbean oceanic lithosphere (Upper Jurassic-Lower Cretaceous) related to Pangea’s break-up. The Cerro Colorado ophiolite, located in the Paraguaná Peninsula, together with the case of the Cordillera de la Costa in north-central Venezuela, are a unique case of these Venezuelan ophiolites containing chromitite bodies. However, the petrogenesis of such a mafic-ultramafic complex and associated chromite ore remains are unknown to date. To advance our understanding of chromite ores in the Caribbean region, the genesis of the Cerro Colorado chromitite body is challenged. The Cerro Colorado chromitite body is characterized by a low-Cr content [Cr# =Cr/ Cr+Al= 0.44-0.60] and a distribution of trace elements in chromite as is typical of high-Al chromitites found in the shallower portions of the petrological Moho Transition Zone of Mesozoic ophiolites. The calculated melts in equilibrium with chromite forming this high-Al chromitite body are back-arc basin basalts. These melts were extracted after ~20 % partial melting of moderately depleted peridotites, which resulted in the precipitation of high-Al chromitite relatively impoverished in PGE (≤ 100 ppb total PGE). A comparison of the geochemical signatures of minor and trace elements in chromite and bulk-PGE contents of the Cerro Colorado chromitite with those of other known chromitites in the peri-Caribbean ophiolites show certain similitude with those high-Al described in the Moa-Baracoa ophiolite in eastern Cuba. The obtained results allow us to suggest that the ultramafic rocks of the Cerro Colorado and the chromitite body associated with it are closely related to the formation of a back-arc basin developed between ca. 125-120 Ma in the rear of the Great Antilles Arc.

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First record of the family Cithaeronidae Simon (Arachnida, Araneae) from Cuba, in the Caribbean Region

Novitates Caribaea ◽

10.33800/nc.v0i6.124 ◽

2013 ◽

pp. 89-91

Author(s):

Alexander Sánchez Ruiz ◽

Antonio D. Brescovit

Keyword(s):

First Record ◽

Caribbean Region ◽

The Family ◽

Eastern Cuba ◽

The Caribbean ◽

Accidental Introduction

The species Cithaeron praedonius O. P.-Cambridge is recorded from eastern Cuba. This is the first record of the family Cithaeronidae in the Caribbean Region. The presence in Cuba of this species is an accidental introduction, but its source is unknown.

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Asthenosphere viscosity in the Caribbean region constrained by gravity anomalies, seismic structure and regional magmatism

10.5194/egusphere-egu2020-12682 ◽

2020 ◽

Author(s):

Yi-Wei Chen ◽

Lorenzo Colli ◽

Dale E. Bird ◽

Jonny Wu ◽

Hejun Zhu

Keyword(s):

Seismic Refraction ◽

Gravity Anomalies ◽

Oceanic Lithosphere ◽

Caribbean Region ◽

Seismic Structure ◽

Dynamic Topography ◽

Borehole Data ◽

Pacific Side ◽

The Caribbean ◽

Free Air Gravity

The Caribbean region has been proposed as a candidate for outflow of asthenospheric mantle, from a shrinking Pacific region to an expanding Atlantic region. If this flow exists it should be associated to a dynamic topography gradient across the region. Estimating dynamic topography requires constraining the thicknesses and densities of sediment, crust and lithosphere to remove their isostatic response from the total topography. Dynamic topography has been studied globally in areas of &#8216;normal&#8217; oceanic lithosphere but the Caribbean region, characterized by overthickened oceanic lithosphere, has not been fully analyzed due to the challenges of estimating crustal thicknesses.Thanks to the wealth of seismic reflection, as well as borehole data, the basement relief and bulk sediment density in the Caribbean are well constrained. We performed a structural inversion of free air gravity anomalies, constrained by seismic refraction data, to established an improved Moho surface which provides more detail than existing global models such as Crust 1.0. With the improved basement and Moho relief, we computed residual basement depth. We obtained a ~300 m dynamic topography high on the Pacific-side of the Caribbean, gradually decaying to 0 m to the east near the Aves ridge.This result supports the hypothesis of Pacific outflow through the Caribbean. Assuming a ~200 km thick asthenosphere and a flow velocity a few to a few tens of cm/yr, as suggested by tomographic imaging and regional magmatism, our results suggest the viscosity is ~5*1018 Pa s.

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African Caribbean Residents of Edinburgh in the Eighteenth and Nineteenth Centuries

Kalfou A Journal of Comparative and Relational Ethnic Studies ◽

10.15367/kf.v7i1.300 ◽

2020 ◽

Vol 7 (1) ◽

Author(s):

Lisa Williams

Keyword(s):

Nineteenth Century ◽

British Empire ◽

Caribbean Region ◽

African Caribbean ◽

The Caribbean ◽

Eighteenth And Nineteenth Centuries

Scotland is gradually coming to terms with its involvement in slavery and colonialism as part of the British Empire. This article places the spotlight on the lives of African Caribbean people who were residents of Edinburgh during the eighteenth and nineteenth centuries. I discuss their varied experiences and contributions: from runaways and men fighting for their freedom in the Scottish courts to women working as servants in city households or marrying into Edinburgh high society. The nineteenth century saw activism among political radicals from abolitionists to anticolonialists; some of these figures studied and taught at Edinburgh University. Their stories reflect the Scottish capital’s many direct connections with the Caribbean region.

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Undiscovered phosphate resources in the Caribbean region and their potential value for agricultural development

Circular ◽

10.3133/cir962 ◽

1985 ◽

Cited By ~ 1

Author(s):

Richard Porter Sheldon ◽

D.F. Davidson ◽

S.R. Riggs ◽

W.C. Burnett

Keyword(s):

Agricultural Development ◽

Caribbean Region ◽

Potential Value ◽

The Caribbean

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Map showing total intensity geomagnetic field of the Caribbean region

10.3133/mf742 ◽

1976 ◽

Keyword(s):

Geomagnetic Field ◽

Caribbean Region ◽

The Caribbean

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Wind Power Assessment In The Caribbean Region Of Colombia, Using Ten-Minute Wind Observations And Era5 Data

Renewable Energy ◽

10.1016/j.renene.2021.03.033 ◽

2021 ◽

Author(s):

Samuel Andrés Gil Ruiz ◽

Julio Eduardo Cañón Barriga ◽

J. Alejandro Martínez

Keyword(s):

Wind Power ◽

Caribbean Region ◽

The Caribbean

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PCV56 COMPARISON OF THE FRAMINGHAM, PROCAM AND MODIFIED FRAMINGHAM RISK SCORES FOR PREDICTING CARDIOVASCULAR EVENTS IN A COHORT FROM A CARDIOVASCULAR PREVENTION PROGRAM IN THE CARIBBEAN REGION OF COLOMBIA

Value in Health ◽

10.1016/j.jval.2020.04.159 ◽

2020 ◽

Vol 23 ◽

pp. S100-S101

Author(s):

F. Salcedo Mejía ◽

P. Miranda Machado ◽

D. Parra Padilla ◽

F. Gómez De la Rosa ◽

M. Carrasquilla Sotomayor ◽

...

Keyword(s):

Prevention Program ◽

Cardiovascular Events ◽

Cardiovascular Prevention ◽

Risk Scores ◽

Caribbean Region ◽

Framingham Risk ◽

The Caribbean

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Wider Caribbean Region—A Pivotal Time to Strengthen Regional Instruments For Biodiversity Conservation

The International Journal of Marine and Coastal Law ◽

10.1163/092735208x331890 ◽

2008 ◽

Vol 23 (3) ◽

pp. 499-530 ◽

Cited By ~ 3

Author(s):

Barbara Lausche

Keyword(s):

Biodiversity Conservation ◽

Sustainable Management ◽

Marine Ecosystem ◽

Legal Framework ◽

Caribbean Region ◽

International Policy ◽

Global Environment Facility ◽

Large Marine Ecosystem ◽

The Caribbean ◽

Specially Protected Areas

AbstractThe countries of the Wider Caribbean Region (WCR) are linked economically by their transboundary living marine resources. The region is facing a continued decline of these resources. Science is improving our understanding of the human contributions to this decline, but national policies and programmes have not kept pace with this understanding. The Caribbean Regional Seas Programme and its Cartagena Convention and Protocols provide the regional legal framework for protection and sustainable management of the WCR's living marine and coastal resources. This article focuses on the Cartagena Convention's Protocol for biodiversity conservation, the Protocol Concerning Specially Protected Areas and Wildlife (SPAW), arguing that governments and organizations need to significantly increase participation in this regional treaty regime to effectively address transboundary environmental challenges. A new initiative, the Global Environment Facility-supported Caribbean Large Marine Ecosystem project, will help in this effort. International policy supports strengthened regional seas programmes. It is now imperative for all levels and sectors to assist governments in strengthening this important treaty regime for biodiversity conservation in the Wider Caribbean Region.

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