No. Registros Solicitud 1 5614 colombia



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PB - PUBLISHER: Geological Society of America (GSA). Boulder, CO, United States. 1991.

CP - COUNTRY OF PUBLICATION: United-States

PY - PUBLICATION YEAR: 1991

CN - CONFERENCE INFORMATION: Geological Society of America, 1991 annual meeting. San Diego, CA, United States. Oct. 21-24, 1991.

LA - LANGUAGE: English

DE - DESCRIPTORS: Colombia-; creep-; data-processing; erosion-; geographic-information-systems; geologic-hazards; human-activity; human-ecology; information-systems; landslides-; mass-movements; Medellin-Colombia; models-; mudflows-; South-America; subsidence-

CC - CATEGORY CODES: 22-Environmental-geology

DT - DOCUMENT TYPE: Abstract; Serial; Conference-Document

BL - BIB LEVEL: Analytic

RF - REFERENCE SOURCE: GeoRef, Copyright 2000, American Geological Institute.

IS - ISSN: 0016-7592

CO - CODEN: GAAPBC

AN - ACCESSION NUMBER: 1994-008020

UD - UPDATE CODE: 199404

Registro 3653 de 5614 - GeoRef Disc 3: 1985-1992

TI - TITLE: Geology and geochemistry of the Guerrero Terrane, western Mexico and its possible correlation with rocks underlying the Greater Antilles and western Andes of Venezuela, Colombia and Ecuador.

AU - AUTHORS: Ruiz-Joaquin; Centeno-Garcia-Elena; Coney-Peter-J; Patchett-P-Jonathan; Ortega-Gutierrez-Fernando

AF - AUTHOR AFFILIATION: University of Arizona, Department of Geosciences, Tucson, AZ, United States

BK - BOOK TITLE: In: Geological Society of America, 1991 annual meeting.

BA - BOOK AUTHORS: Anonymous

SO - SOURCE: Abstracts with Programs - Geological Society of America. 23; 5, Pages 218. 1991.

PB - PUBLISHER: Geological Society of America (GSA). Boulder, CO, United States. 1991.

CP - COUNTRY OF PUBLICATION: United-States

PY - PUBLICATION YEAR: 1991

CN - CONFERENCE INFORMATION: Geological Society of America, 1991 annual meeting. San Diego, CA, United States. Oct. 21-24, 1991.

LA - LANGUAGE: English

DE - DESCRIPTORS: Andes-; Antilles-; basement-; carbonate-rocks; Caribbean-region; clastic-rocks; Colombia-; Cretaceous-; crust-; Ecuador-; geochemistry-; graywacke-; Greater-Antilles; Guerrero-Terrane; igneous-rocks; island-arcs; Jurassic-; lava-; limestone-; Mesozoic-; Mexico-; North-America; North-American-Cordillera; plate-tectonics; sedimentary-rocks; South-America; terranes-; Venezuela-; volcanic-rocks; West-Indies; western-Andes; western-Mexico

CC - CATEGORY CODES: 16-Structural-geology; 02C-Geochemistry-of-rocks,-soils,-and-sediments

DT - DOCUMENT TYPE: Abstract; Serial; Conference-Document

BL - BIB LEVEL: Analytic

RF - REFERENCE SOURCE: GeoRef, Copyright 2000, American Geological Institute.

IS - ISSN: 0016-7592

CO - CODEN: GAAPBC

AN - ACCESSION NUMBER: 1994-008088

UD - UPDATE CODE: 199404

Registro 3654 de 5614 - GeoRef Disc 3: 1985-1992

TI - TITLE: Intra-oceanic environment for the Late Jurassic-Early Cretaceous plutono-magmatic arc-sequences exposed on the western margins of the North and South American continents.

AU - AUTHORS: Tardy-M; Lapierre-H; Beck-C; Thiery-J-M; Ortiz-E; Talavera-O; Carfantan-J-C

AF - AUTHOR AFFILIATION: Universite de Savoie, Laboratoire de Geodynamique, Chambery, France

BK - BOOK TITLE: In: Sixth meeting of the European Union of Geosciences.

BA - BOOK AUTHORS: Anonymous

SO - SOURCE: Terra Abstracts. 3; 1, Pages 325. 1991.

PB - PUBLISHER: Blackwell Scientific Publications. Oxford, International. 1991.

CP - COUNTRY OF PUBLICATION: International

PY - PUBLICATION YEAR: 1991

CN - CONFERENCE INFORMATION: Sixth meeting of the European Union of Geosciences. Strasbourg, France. March 24-28, 1991.

LA - LANGUAGE: English

DE - DESCRIPTORS: Central-America; Colombia-; Cretaceous-; crust-; geochemistry-; igneous-rocks; intraplate-processes; island-arcs; Jurassic-; lithogeochemistry-; Lower-Cretaceous; Mesozoic-; Mexico-; oceanic-crust; plate-tectonics; plutonic-rocks; South-America; subduction-; Tethys-; Upper-Jurassic; volcanic-rocks

CC - CATEGORY CODES: 18-Solid-earth-geophysics; 05A-Igneous-and-metamorphic-petrology

DT - DOCUMENT TYPE: Abstract; Serial; Conference-Document

BL - BIB LEVEL: Analytic

RF - REFERENCE SOURCE: GeoRef, Copyright 2000, American Geological Institute.

IS - ISSN: 0954-4887

AN - ACCESSION NUMBER: 1994-024551

UD - UPDATE CODE: 199412

Registro 3655 de 5614 - GeoRef Disc 3: 1985-1992

TI - TITLE: GIS-assisted modelling of soil-induced mass movement hazards; a case study of the Upper Coellop River basin, Tolima, Colombia.

AU - AUTHORS: Jaime-Lopez-H; Zinck-J-A

AF - AUTHOR AFFILIATION: IGAC, Bogota, Colombia

SO - SOURCE: ITC Journal = Bulletin de l'ITC. 1991; 4, Pages 202-220. 1991.

PB - PUBLISHER: International Institute for Aerial Survey and Earth Sciences. Enschede, Netherlands. 1991.

CP - COUNTRY OF PUBLICATION: Netherlands

PY - PUBLICATION YEAR: 1991

LA - LANGUAGE: English

LS - LANGUAGE OF SUMMARY: French; Spanish

DE - DESCRIPTORS: basement-; Coellop-River-basin; Colombia-; computers-; data-processing; frost-action; geologic-hazards; landslides-; mass-movements; mechanical-properties; mountains-; prediction-; South-America; surficial-geology; Tolima-Colombia

CC - CATEGORY CODES: 22-Environmental-geology

DT - DOCUMENT TYPE: Serial

BL - BIB LEVEL: Analytic

IL - ILLUSTRATION: illus. incl. 8 tables, geol. sketch maps.

RF - REFERENCE SOURCE: GeoRef, Copyright 2000, American Geological Institute. Reference includes data from PASCAL, Institute de l'Information Scientifique et Technique, Vandoeuvre-les-Nancy, France

IS - ISSN: 0303-2434

AN - ACCESSION NUMBER: 1994-052701

UD - UPDATE CODE: 199424

Registro 3656 de 5614 - GeoRef Disc 3: 1985-1992

BK - BOOK TITLE: Petrotectonic characterization of the Central Andean Terrane, Colombia.

BA - BOOK AUTHORS: Restrepo-Pace-Pedro-A

CP - COUNTRY OF PUBLICATION: United-States

PY - PUBLICATION YEAR: 1991

DG - DEGREE GRANTED: Master's

DI - DEGREE GRANTING INSTITUTION: University of Arizona. Tucson, AZ, United States. Pages: 13. 1991.

LA - LANGUAGE: English

AB - ABSTRACT: The Central Andean Terrane is an Early Paleozoic metavolcanoclastic - metapelitic belt which extends from the Central Andes of Colombia to northern Peru. A section across the Central Cordillera of Colombia is presented. Here the Central Andean Terrane consists mainly of amphibolitic schists and graphitic schists which range from greenschist facies to epidote-amphibolite facies. The mineral assemblages depict one prograde metamorphic event. Schists are isoclinally folded and toward the western margin of the Central Andean Terrane foliation is transposed. This transposition is probably related to overthrusting of the Amaime Terrane, which lies west of the Central Andean Terrane. Major and trace element geochemistry reveal two distinct sources for the Central Andean Terrane's protolith: an intra-oceanic island arc and a continental margin. The accretion and metamorphism of the Central Andean Terrane took place in Late Silurian-Early Devonian time. Based on current Paleozoic paleogeographic reconstructions, two tectonic evolution models for the Central Andean Terrane are here presented.

DE - DESCRIPTORS: accreting-plate-boundary; Amaime-Terrane; Andes-; Central-Andes; Central-Andes-Terrane; Colombia-; continental-margin; Devonian-; facies-; faults-; foliation-; geochemical-methods; greenschist-facies; island-arcs; Lower-Devonian; metamorphic-rocks; models-; Northern-Andes; northern-Peru; overthrust-faults; paleogeography-; Paleozoic-; Peru-; protoliths-; schists-; Silurian-; South-America; terranes-; Upper-Silurian

CC - CATEGORY CODES: 16-Structural-geology; 05A-Igneous-and-metamorphic-petrology

DT - DOCUMENT TYPE: Thesis-or-Dissertation

BL - BIB LEVEL: Monograph

IL - ILLUSTRATION: Refs: 57; illus. incl. 3 tables.

RF - REFERENCE SOURCE: GeoRef, Copyright 2000, American Geological Institute.

AN - ACCESSION NUMBER: 1994-055464

UD - UPDATE CODE: 199424

Registro 3657 de 5614 - GeoRef Disc 3: 1985-1992

TI - TITLE: Propuesta de unificacion para la nomenclatura estratigrafica del Terciario del Valle del Cauca y del Cauca

Translated Title: Standardization proposal for stratigraphic nomenclature of the Tertiary in the Valle del Cauca and Cauca.

AU - AUTHORS: Padilla-V-Luis-Eduardo

AF - AUTHOR AFFILIATION: Luis E. Padilla & Cia, Cali, Colombia

SO - SOURCE: Boletin de Geologia (Bucaramanga). 20; 35, Pages 5-17. 1991.

PB - PUBLISHER: Universidad Industrial de Santander. Bucaramanga, Colombia. 1991.

CP - COUNTRY OF PUBLICATION: Colombia

PY - PUBLICATION YEAR: 1991

LA - LANGUAGE: Spanish

DE - DESCRIPTORS: Cauca-River; Cauca-River-valley; Cenozoic-; Colombia-; Esmita-Formation; Ferreira-Formation; geologic-maps; Guachinte-Formation; maps-; nomenclature-; South-America; stratigraphy-; Tertiary-; Vijes-Formation

CC - CATEGORY CODES: 12-Stratigraphy

DT - DOCUMENT TYPE: Serial; Map

BL - BIB LEVEL: Analytic

MS - MAP SCALE: 1:250,000

MP - MAP TYPE: geologic-maps

IL - ILLUSTRATION: Refs: 18; illus. incl. strat. cols.

RF - REFERENCE SOURCE: GeoRef, Copyright 2000, American Geological Institute.

IS - ISSN: 0120-0283

CO - CODEN: UISBAV

AN - ACCESSION NUMBER: 1995-002208

UD - UPDATE CODE: 199502

Registro 3658 de 5614 - GeoRef Disc 3: 1985-1992

TI - TITLE: Caracter ciclico del terciario hullero del Valle del Cauca y Cauca

Translated Title: Cyclic character of the Tertiary coal in Valle del Cauca and Cauca.

AU - AUTHORS: Padilla-V-Luis-Eduardo

AF - AUTHOR AFFILIATION: Luis Eduardo Padilla & Cia, Cali, Colombia

SO - SOURCE: Boletin de Geologia (Bucaramanga). 20; 35, Pages 19-26. 1991.

PB - PUBLISHER: Universidad Industrial de Santander. Bucaramanga, Colombia. 1991.

CP - COUNTRY OF PUBLICATION: Colombia

PY - PUBLICATION YEAR: 1991

LA - LANGUAGE: Spanish

DE - DESCRIPTORS: basins-; Cauca-River; Cauca-River-valley; Cenozoic-; coal-; Colombia-; cyclic-processes; organic-residues; sedimentary-basins; sedimentary-rocks; South-America; stratigraphy-; Tertiary-

CC - CATEGORY CODES: 29A-Economic-geology,-geology-of-energy-sources; 06B-Petrology-of-coal

DT - DOCUMENT TYPE: Serial

BL - BIB LEVEL: Analytic

IL - ILLUSTRATION: Refs: 20; illus. incl. strat. col., sketch map.

RF - REFERENCE SOURCE: GeoRef, Copyright 2000, American Geological Institute.

IS - ISSN: 0120-0283

CO - CODEN: UISBAV

AN - ACCESSION NUMBER: 1995-002209

UD - UPDATE CODE: 199502

Registro 3659 de 5614 - GeoRef Disc 3: 1985-1992

TI - TITLE: Lineamientos de direccion Noroeste-Sureste en los departamentos de Santander y Norte de Santander, Colombia

Translated Title: Northwest-southeast trending lineaments in the departments of Santander and Norte de Santander, Colombia.

AU - AUTHORS: Ujueta-L-Guillermo

AF - AUTHOR AFFILIATION: Universidad Nacional, Departamento de Geociencias, Bogota, Colombia

SO - SOURCE: Boletin de Geologia (Bucaramanga). 20; 35, Pages 27-51. 1991.

PB - PUBLISHER: Universidad Industrial de Santander. Bucaramanga, Colombia. 1991.

CP - COUNTRY OF PUBLICATION: Colombia

PY - PUBLICATION YEAR: 1991

LA - LANGUAGE: Spanish

LS - LANGUAGE OF SUMMARY: English

DE - DESCRIPTORS: Colombia-; fractures-; interpretation-; lineaments-; Norte-de-Santander-Colombia; Santander-Colombia; shear-zones; South-America; tectonics-

CC - CATEGORY CODES: 16-Structural-geology

DT - DOCUMENT TYPE: Serial

BL - BIB LEVEL: Analytic

IL - ILLUSTRATION: Refs: 35; illus. incl. geol. sketch maps.

RF - REFERENCE SOURCE: GeoRef, Copyright 2000, American Geological Institute.

IS - ISSN: 0120-0283

CO - CODEN: UISBAV

AN - ACCESSION NUMBER: 1995-002210

UD - UPDATE CODE: 199502

Registro 3660 de 5614 - GeoRef Disc 3: 1985-1992

TI - TITLE: Mapa geologico del departamento de Santander

Translated Title: Geologic map of Santander Department.

AU - AUTHORS: Silvestre-Luis-Albino-Leon

AF - AUTHOR AFFILIATION: Universidad Industrial de Santander, Departamento de Geologia, Bucaramanga, Colombia

SO - SOURCE: Boletin de Geologia (Bucaramanga). 20; 35, Pages 53-63. 1991.

PB - PUBLISHER: Universidad Industrial de Santander. Bucaramanga, Colombia. 1991.

CP - COUNTRY OF PUBLICATION: Colombia

PY - PUBLICATION YEAR: 1991

LA - LANGUAGE: Spanish

DE - DESCRIPTORS: areal-geology; Colombia-; geologic-maps; maps-; Santander-Colombia; South-America

CC - CATEGORY CODES: 14-Geologic-maps

DT - DOCUMENT TYPE: Serial; Map

BL - BIB LEVEL: Analytic

MS - MAP SCALE: 1:800,000

MP - MAP TYPE: geologic-maps

IL - ILLUSTRATION: Refs: 8; illus.

RF - REFERENCE SOURCE: GeoRef, Copyright 2000, American Geological Institute.

IS - ISSN: 0120-0283

CO - CODEN: UISBAV

AN - ACCESSION NUMBER: 1995-002211

UD - UPDATE CODE: 199502

Registro 3661 de 5614 - GeoRef Disc 3: 1985-1992

TI - TITLE: La Dunita de Medellin y sus relaciones estructurales con el basamento metamorfico e intrusivo de la Cordillera Central, Departamento de Antioquia

Translated Title: The Medellin Dunite and its structural relationships with the metamorphic and intrusive basement of the Cordillera Central, Antioquia Department.

AU - AUTHORS: Kammer-Andreas

AF - AUTHOR AFFILIATION: Universidad Industrial de Santander, Bucaramanga, Colombia

SO - SOURCE: Boletin de Geologia (Bucaramanga). 20; 35, Pages 65-106. 1991.

PB - PUBLISHER: Universidad Industrial de Santander. Bucaramanga, Colombia. 1991.

CP - COUNTRY OF PUBLICATION: Colombia

PY - PUBLICATION YEAR: 1991

LA - LANGUAGE: Spanish

LS - LANGUAGE OF SUMMARY: English

DE - DESCRIPTORS: Antioquia-Colombia; basement-; Central-Cordillera; Colombia-; deformation-; ductile-deformation; geologic-maps; igneous-rocks; maps-; Medellin-Dunite; plutonic-rocks; shear-; South-America; tectonic-maps; tectonics-

CC - CATEGORY CODES: 16-Structural-geology

DT - DOCUMENT TYPE: Serial; Map

BL - BIB LEVEL: Analytic

MP - MAP TYPE: geologic-maps

; tectonic-maps

IL - ILLUSTRATION: Refs: 36; illus.

RF - REFERENCE SOURCE: GeoRef, Copyright 2000, American Geological Institute.

IS - ISSN: 0120-0283

CO - CODEN: UISBAV

AN - ACCESSION NUMBER: 1995-002212

UD - UPDATE CODE: 199502

Registro 3662 de 5614 - GeoRef Disc 3: 1985-1992

TI - TITLE: A systematic revision of the Central-Atlantic Halichondrida (Demospongiae, Porifera).

AU - AUTHORS: Diaz-M-C; van-Soest-R-W-M; Pomponi-S-A

BK - BOOK TITLE: In: Fossil and Recent sponges.

BA - BOOK AUTHORS: Reitner-J (editor); Keupp-H (editor)

SO - SOURCE: Pages 134-149. 1991.

PB - PUBLISHER: Springer-Verlag. Berlin, Federal Republic of Germany. 1991.

CP - COUNTRY OF PUBLICATION: Federal-Republic-of-Germany

PY - PUBLICATION YEAR: 1991

CN - CONFERENCE INFORMATION: Fossil and Recent sponges. Berlin, Federal Republic of Germany. Sept. 26-28, 1988.

LA - LANGUAGE: English

DE - DESCRIPTORS: Atlantic-Ocean; Bahamas-; Caribbean-region; Colombia-; Demospongea-; evolution-; Florida-; Gulf-of-Mexico; Halichondrida-; Invertebrata-; morphology-; North-Atlantic; Porifera-; revision-; South-America; southeastern-Florida; taxonomy-; United-States; Venezuela-; West-Indies

CC - CATEGORY CODES: 10-Invertebrate-paleontology

DT - DOCUMENT TYPE: Book; Conference-Document

BL - BIB LEVEL: Analytic

IL - ILLUSTRATION: Refs: 33; illus.

RF - REFERENCE SOURCE: GeoRef, Copyright 2000, American Geological Institute.

AN - ACCESSION NUMBER: 1995-002338

UD - UPDATE CODE: 199502

Registro 3663 de 5614 - GeoRef Disc 3: 1985-1992

TI - TITLE: A systematic revision of the Central Atlantic Halichondrida (Demospongiae, Porifera); Part II, Patterns of distribution of secondary metabolites.

AU - AUTHORS: Pomponi-S-A; Wright-A-E; Diaz-M-C; van-Soest-R-W-M

BK - BOOK TITLE: In: Fossil and Recent sponges.

BA - BOOK AUTHORS: Reitner-J (editor); Keupp-H (editor)

SO - SOURCE: Pages 150-158. 1991.

PB - PUBLISHER: Springer-Verlag. Berlin, Federal Republic of Germany. 1991.

CP - COUNTRY OF PUBLICATION: Federal-Republic-of-Germany

PY - PUBLICATION YEAR: 1991

CN - CONFERENCE INFORMATION: Fossil and Recent sponges. Berlin, Federal Republic of Germany. Sept. 26-28, 1988.

LA - LANGUAGE: English

DE - DESCRIPTORS: Atlantic-Ocean; Bahamas-; Caribbean-region; Colombia-; Demospongea-; distribution-; Florida-; Gulf-of-Mexico; Halichondrida-; Invertebrata-; metabolism-; morphology-; North-Atlantic; patterns-; Porifera-; revision-; South-America; southeastern-Florida; taxonomy-; United-States; Venezuela-; West-Indies

CC - CATEGORY CODES: 10-Invertebrate-paleontology

DT - DOCUMENT TYPE: Book; Conference-Document

BL - BIB LEVEL: Analytic

IL - ILLUSTRATION: Refs: 17; 1 table.

RF - REFERENCE SOURCE: GeoRef, Copyright 2000, American Geological Institute.

AN - ACCESSION NUMBER: 1995-002339

UD - UPDATE CODE: 199502

Registro 3664 de 5614 - GeoRef Disc 3: 1985-1992

TI - TITLE: Structure and U-Pb mineral geochronometry of the southern Scrip Range, southern Omineca Belt, British Colombia; a progress report.

AU - AUTHORS: Scammell-R-J

AF - AUTHOR AFFILIATION: Queen's University, Department of Geological Sciences, Kingston, ON, Canada

BK - BOOK TITLE: In: Project Lithoprobe; Southern Canadian Cordillera transect workshop.

CA - CORPORATE AUTHOR: University of Calgary, Calgary, AB, Canada

SO - SOURCE: Lithoprobe Report. 16; Pages 85-96. 1991.

PB - PUBLISHER: University of British Columbia, Lithoprobe Secretariat [for the] Canadian Lithoprobe Program. British Columbia, Canada. 1991.

CP - COUNTRY OF PUBLICATION: Canada

PY - PUBLICATION YEAR: 1991

CN - CONFERENCE INFORMATION: Southern Canadian Cordillera Transect workshop. Calgary, AB, Canada. March 16-17, 1991.

LA - LANGUAGE: English

DE - DESCRIPTORS: absolute-age; actinides-; British-Columbia; Canada-; Canadian-Cordillera; Cretaceous-; dates-; deformation-; faults-; folds-; foliation-; hanging-wall; lead-; Lithoprobe-; Lower-Cretaceous; Mesozoic-; metals-; North-America; North-American-Cordillera; Omineca-Belt; Scrip-Range; U-Pb; uranium-; Western-Canada

CC - CATEGORY CODES: 16-Structural-geology; 03-Geochronology

DT - DOCUMENT TYPE: Serial; Conference-Document

BL - BIB LEVEL: Analytic

IL - ILLUSTRATION: Refs: 39; illus. incl. 1 table, geol. sketch maps.

RF - REFERENCE SOURCE: GeoRef, Copyright 2000, American Geological Institute.

CO - CODEN: #03834

AN - ACCESSION NUMBER: 1995-018764

UD - UPDATE CODE: 199507

Registro 3665 de 5614 - GeoRef Disc 3: 1985-1992

TI - TITLE: A Caribbean Plateau origin for Gorgona komatiites?.

AU - AUTHORS: Storey-M; Mahoney-J-J; Kroenke-L-W; Saunders-A-D

AF - AUTHOR AFFILIATION: University of Leicester, Department of Geology, Leicester, United Kingdom

BK - BOOK TITLE: In: Sixth meeting of the European Union of Geosciences.

BA - BOOK AUTHORS: Anonymous

SO - SOURCE: Terra Abstracts. 3; 1, Pages 457. 1991.

PB - PUBLISHER: Blackwell Scientific Publications. Oxford, International. 1991.

CP - COUNTRY OF PUBLICATION: International

PY - PUBLICATION YEAR: 1991

CN - CONFERENCE INFORMATION: Sixth meeting of the European Union of Geosciences. Strasbourg, France. March 24-28, 1991.

LA - LANGUAGE: English

DE - DESCRIPTORS: Caribbean-Plateau; Colombia-; Cretaceous-; crust-; East-Pacific; Galapagos-Rift; Gorgona-Island; greenstone-belts; hot-spots; igneous-rocks; isotope-ratios; isotopes-; komatiite-; lead-; magnesium-oxides; Mesozoic-; metals-; metamorphic-belts; Middle-Cretaceous; Nd-144-Nd-143; neodymium-; obduction-; oceanic-crust; oxides-; Pacific-Ocean; Pb-206-Pb-204; plate-tectonics; plateaus-; plutonic-rocks; radioactive-isotopes; rare-earths; South-America; stable-isotopes; ultramafics-

CC - CATEGORY CODES: 02C-Geochemistry-of-rocks,-soils,-and-sediments; 05A-Igneous-and-metamorphic-petrology; 18-Solid-earth-geophysics

DT - DOCUMENT TYPE: Abstract; Serial; Conference-Document

BL - BIB LEVEL: Analytic

MC - MAP COORDINATES: LAT: N024400; N030000; LONG: W0780000; W0782000.

IL - ILLUSTRATION: illus.

RF - REFERENCE SOURCE: GeoRef, Copyright 2000, American Geological Institute.

IS - ISSN: 0954-4887

AN - ACCESSION NUMBER: 1995-030593

UD - UPDATE CODE: 199512

Registro 3666 de 5614 - GeoRef Disc 3: 1985-1992

BK - BOOK TITLE: Hydrocarbon maturation and clay diagenesis in the Tolu area, northwestern Colombia.

BA - BOOK AUTHORS: Garcia-Gonzalez-Mario

CP - COUNTRY OF PUBLICATION: United-States

PY - PUBLICATION YEAR: 1991

DG - DEGREE GRANTED: Master's

DI - DEGREE GRANTING INSTITUTION: University of Wyoming. Laramie, WY, United States. Pages: 154. 1991.

LA - LANGUAGE: English

AB - ABSTRACT: The oblique convergence between the South American and Caribbean plates in NW Colombia has resulted in two accretionary terranes, the San Jacinto and Sinu foldbelts. Each foldbelt exhibits a characteristic, but different maturation history. The differences are the result of temporal variations in the tectonic framework of the two foldbelts. These temporal variations resulted in significant differences in their time-temperature histories. Thermal and geochemical models were developed for the Tolu area in order to illustrate the differences in hydrocarbon maturation between the San Jacinto and Sinu foldbelts. In the San Jacinto foldbelt, the generation of hydrocarbons started in the Paleocene (57 Ma) and continued until the present, generating hydrocarbons ranging from oil to overmature gas, depending on the depth of burial of the Late Cretaceous-Eocene marine shales. In the Sinu foldbelt, hydrocarbon generation started in the Pliocene (4 Ma.) and continued until present; the hydrocarbons generated range in composition from biogenic gas to overmature gas, depending on the depth of burial of the Oligocene-Early Pliocene marine and marginal marine shales. The diagenesis of the Miocene shales within the Sinu foldbelt is dominated by the transformation of smectite to chlorite via mixed-layer chlorite/smectite (C/S). Changes in the expandability and ordering of the C/S correspond to changes in temperature due to burial. The appearance of C/S corrensite at a vitrinite reflectance value of 0.5 is a thermal indicator that marks the onset of hydrocarbon generation in the Sinu foldbelt.

DE - DESCRIPTORS: accretion-; burial-; Caribbean-Plate; Cenozoic-; chlorite-; chlorite-group; chloritization-; clastic-rocks; clay-minerals; Colombia-; corrensite-; Cretaceous-; depth-; diagenesis-; fold-belts; genesis-; geophysical-methods; hydrocarbon-indicators; Lower-Cretaceous; macerals-; marine-sedimentation; Mesozoic-; metasomatism-; mixed-layer-minerals; models-; natural-gas; Paleocene-; Paleogene-; petroleum-; plate-collision; reflectance-; San-Jacinto-fold-belt; sedimentary-rocks; sedimentation-; seismic-methods; shale-; sheet-silicates; silicates-; Sinu-fold-belt; smectite-; South-America; South-American-Plate; terranes-; Tertiary-; thermal-history; Tolu-Colombia; vitrinite-


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