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Tracers of uplift and subsidence in the Cape Verde archipelago

R. Ramalho, G. Helffrich, D. N. Schmidt and D. Vance
Tracers of uplift and subsidence in the Cape Verde archipelago
Journal of the Geological Society of London (May 2010) 167 (3): 519-538

Abstract

Ocean islands are subject to vertical movements through their lifetime and these movements' origins are poorly understood. Tracking island freeboard provides insight into the mechanisms that cause these movements. The Cape Verde archipelago is the result of hotspot volcanism ranging from 26 Ma to the present, and constitutes a structural pile that has preserved a record of the palaeo-positions of mean sea level. These palaeo-markers, both sedimentary and volcanic, are datable and can be used to track the island's history of vertical movements when used in conjunction with a eustatic curve. We have studied the volcanostratigraphy of Cape Verde and mapped the palaeo-marker positions and features, and we provide the sea-level height information that can be estimated through them. Evidence exists for differential uplift histories throughout the archipelago, with substantial uplift in some of the islands synchronous with volcanism. Other islands, in contrast, exhibit evidence for stability or complex uplift-subsidence histories.


ISSN: 0016-7649
EISSN: 2041-479X
Coden: JGSLAS
Serial Title: Journal of the Geological Society of London
Serial Volume: 167
Serial Issue: 3
Title: Tracers of uplift and subsidence in the Cape Verde archipelago
Affiliation: University of Bristol, Department of Earth Sciences, Bristol, United Kingdom
Pages: 519-538
Published: 201005
Text Language: English
Publisher: Geological Society of London, London, United Kingdom
References: 53
Accession Number: 2010-044035
Categories: Solid-earth geophysics
Document Type: Serial
Bibliographic Level: Analytic
Annotation: Supplementary material is available at http://www.geolsoc.org.uk/SUP18390
Illustration Description: illus. incl. sects., 6 tables, geol. sketch maps
N14°40'00" - N17°19'60", W25°30'00" - W22°30'00"
Country of Publication: United Kingdom
Secondary Affiliation: GeoRef, Copyright 2017, American Geosciences Institute. Reference includes data from GeoScienceWorld, Alexandria, VA, United States. Reference includes data from The Geological Society, London, London, United Kingdom
Update Code: 201024
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