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Titre du document / Document title

Structure of the North Park and South Park basins, Colorado : An integrated geophysical study

Auteur(s) / Author(s)

TREVINO Leandro (1) ; KELLER G. Randy (1) ;

Affiliation(s) du ou des auteurs / Author(s) Affiliation(s)

(1) Department of Geological Sciences, University of Texas at El Paso, ETATS-UNIS

Résumé / Abstract

The CD-ROM geophysical transect passes through the intermontane valleys of central Colorado called parks. However, relatively little is known about their structure. Geophysical exploration of the North and South Park basins is mostly of a proprietary nature and few of these investigations are ever published. In this study, we integrate gravity, geologic, seismic, and digital elevation data to determine the subsurface structure of the North Park and South Park basins of central Colorado and their structural setting. Digital elevation and gravity images and computer modeling of the gravity data show that the subsurface structure of these basins is not as simple as suggested by their surface expression. Modeling of gravity profiles constrained by drilling and geologic data shows that North Park and South Park are underlain by complex, fault-bounded, asymmetric basins. The gravity low over North Park is the result of basin fill of both Cenozoic and Mesozoic age that reaches a thickness of ∼6 km. Very low gravity values found in the northern portion of the South Park are associated with the Colorado mineral belt. Modeling of two profiles south of this area indicates that a series of faults divide the basin. Particularly in the south, the basin is divided into sub-basins by a structural high. This study also provided constraints for the seismic refraction modeling that was part of the CD-ROM project.

Revue / Journal Title

Geophysical monograph    ISSN  0065-8448   CODEN GPMGAD 

Source / Source

2005, vol. 154 (450 p.)  [Document : 7 p.] (26 ref.), pp. 91-97 [7 page(s) (article)]

Langue / Language

Anglais

Editeur / Publisher

American Geophysical Union, Washington, DC, ETATS-UNIS  (1956) (Revue)

Mots-clés anglais / English Keywords

Phanerozoic

;

North America

;

United States

;

projects

;

seismic refraction

;

thickness

;

age

;

Mesozoic

;

Cenozoic

;

faults

;

drilling

;

Modeling

;

computers

;

Gravity

;

exploration

;

valleys

;

Colorado mineral belt

;

Colorado

;

Mots-clés français / French Keywords

Phanérozoïque

;

Amérique du Nord

;

Etats Unis

;

Projet

;

Sismique réfraction

;

Epaisseur

;

Age

;

Mésozoïque

;

Cénozoïque

;

Faille

;

Forage

;

Modélisation

;

Ordinateur

;

Gravité

;

Prospection

;

Vallée

;

Ceinture minéralisée Colorado

;

Colorado

;

Mots-clés espagnols / Spanish Keywords

Fanerozoico

;

America del norte

;

Estados Unidos

;

Proyecto

;

Método refracción sísmica

;

Espesor

;

Edad

;

Cenozoico

;

Quebrado

;

Sondeo

;

Modelización

;

Computadora

;

Gravedad

;

Prospección

;

Valle

;

Colorado

;

Localisation / Location

INIST-CNRS, Cote INIST : 8310, 35400012543741.0060

Nº notice refdoc (ud4) : 16834100



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