Moho structure of Central America based on three-dimensional lithospheric density modelling of satellite derived gravity data

Lücke, Oscar H. (2014) Moho structure of Central America based on three-dimensional lithospheric density modelling of satellite derived gravity data International Journal of Earth Sciences, 103 (7). pp. 1733-1745. DOI 10.1007/s00531-012-0787-y.

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Abstract

The Central American isthmus hosts a highly
variable Moho structure due to the diverse origin and
composition of the crustal basement and the influence of
large-scale neotectonic processes. Gravity data from the
combined geopotential model EGM2008 were interpreted
via forward modelling to outline the three-dimensional
lithospheric density structure along the Middle American
Trench, as well as the segmentation of the oceanic Cocos
and Nazca plates and the overriding Caribbean plate. In
this work, results for the depth of the Moho obtained from
the density model are presented. The Quaternary volcanic
arc correlates with a maximum Moho depth of 44 km in
western Guatemala. To the south-east of the continental
shelf, the Caribbean plate shows Moho depths between 20
and 12 km whereas to the north, values as shallow as 8 km
are observed at the Cayman trough. For the oceanic Cocos
plate, depths between 16 and 21 km are obtained for the
Moho along the Cocos ridge, contrasting with values
between 15 and 12 km for the seamount segment and 8 and
11 km for the segments of the crust that are not affected by
the Galapagos hot-spot track.

Document Type: Article
Keywords: Moho; Satellite; Gravity; Density mode
Research affiliation: Kiel University
OceanRep > SFB 574
Refereed: Yes
DOI etc.: 10.1007/s00531-012-0787-y
ISSN: 1437-3254
Contribution Number:
ProjectNumber
SFB 574225
Date Deposited: 31 Jan 2012 09:30
Last Modified: 08 Oct 2014 13:02
URI: http://eprints.uni-kiel.de/id/eprint/13601

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