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Colon fold belt of Honduras; evidence for Late Cretaceous collision between the continental Chortis Block and intra-oceanic Caribbean Arc

Robert D. Rogers, Paul Mann, Peter A. Emmet and Margaret E. Venable
Colon fold belt of Honduras; evidence for Late Cretaceous collision between the continental Chortis Block and intra-oceanic Caribbean Arc (in Geologic and tectonic development of the Caribbean Plate boundary in northern Central America, Paul Mann (editor))
Special Paper - Geological Society of America (2007) 428: 129-149

Abstract

We document a previously unrecognized, thin-skinned arc-continental collisional zone, termed here the Colon fold-thrust belt, which trends northeastward for 350 km near the Honduras-Nicaragua border region. The Colon belt occurs in three collinear segments: (1) a 200-km-long belt of remote but well-exposed Jurassic-Late Cretaceous rock outcrops described from original geologic mapping presented in this study; (2) a 75-km-long subsurface belt of Jurassic-Late Cretaceous rocks known from onland seismic reflection studies and exploration drilling for oil; and (3) an offshore 75-km-long subsurface belt of Late Cretaceous to Eocene rocks known from exploration studies. These three segments share a continuity of the deformation front and associated folds, as well as a similar timing of fold-thrust deformation (segment one: post-Campanian; segment two: post-Late Cretaceous; segment three: post-Cretaceous and possible to Eocene); and all segments display southeastward-dipping thrusts and related northeastward-verging folds that structurally elevate Cretaceous rocks. The structural position of the Siuna belt of oceanic island arc affinity to the south of the Colon fold-thrust belt, its association with calc-alkaline volcanic rocks of the Caribbean arc, and its Campanian (75 Ma) emplacement age, suggest that the Siuna belt was overthrust to the north and northwest onto the hanging wall of the Colon fold-thrust belt. The northwestward-transported Colon fold-thrust belt and adjacent Siuna belt document a Late Cretaceous collisional event between a south-facing continental margin of the Chortis block of northern Central America and an eastward and northeastward-moving, Early to Late Cretaceous Caribbean arc system.


ISSN: 0072-1077
EISSN: 2331-219X
Coden: GSAPAZ
Serial Title: Special Paper - Geological Society of America
Serial Volume: 428
Title: Colon fold belt of Honduras; evidence for Late Cretaceous collision between the continental Chortis Block and intra-oceanic Caribbean Arc
Title: Geologic and tectonic development of the Caribbean Plate boundary in northern Central America
Affiliation: University of Texas at Austin, Institute for Geophysics, Austin, TX, United States
Affiliation: University of Texas at Austin, Institute of Geophysics, Austin, TX, United States
Pages: 129-149
Published: 2007
Text Language: English
Publisher: Geological Society of America (GSA), Boulder, CO, United States
ISBN: 978-0-8137-2428-7
References: 67
Accession Number: 2008-044999
Categories: Structural geology
Document Type: Serial
Bibliographic Level: Analytic
Illustration Description: illus. incl. sects., strat. col., 2 tables, geol. sketch maps
N13°00'00" - N16°00'00", W89°15'00" - W83°15'00"
Secondary Affiliation: Cy-Fair College, USA, United States
Country of Publication: United States
Secondary Affiliation: GeoRef, Copyright 2017, American Geosciences Institute.
Update Code: 200813
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