Syntectonic Cenozoic sedimentation in the northern middle Magdalena Valley Basin of Colombia and implications for exhumation of the Northern Andes

Gómez, Elías; Jordan, Teresa E.; Allmendinger, Richard W.; Hegarty, Kerry A.; Kelley, Simon P.

doi:10.1130/b25454.1

Cited by 115 publications

(159 citation statements)

References 19 publications

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Section: Evidence Of Pre-neogene Deformationmentioning

confidence: 99%

“…A highly variable angular unconformity between lowerto-middle Eocene strata resting upon Paleocene or older units has been well documented in the subsurface of the Magdalena Valley (Villamil et al, 1995;George et al, 1997;Pindell et al, 1998;Gómez et al, 2003Gómez et al, , 2005b and in outcrops (Restrepo-Pace et al, 2004). In the Magdalena Valley, structures beneath the unconformity have been interpreted as high-angle strike-slip faults (Pindell et al, 1998;Gómez et al, 2005b). Strata overlying this unconformity show a wedge of divergent growth strata of middle Eocene-lower Miocene age in the southern middle Magdalena Valley (Gómez et al, 2003) and upper Oligocene-middle Miocene age in the northern Magdalena Valley (Gómez et al, 2005b).…”

Section: Evidence Of Pre-neogene Deformationmentioning

confidence: 99%

“…In the Magdalena Valley, structures beneath the unconformity have been interpreted as high-angle strike-slip faults (Pindell et al, 1998;Gómez et al, 2005b). Strata overlying this unconformity show a wedge of divergent growth strata of middle Eocene-lower Miocene age in the southern middle Magdalena Valley (Gómez et al, 2003) and upper Oligocene-middle Miocene age in the northern Magdalena Valley (Gómez et al, 2005b). In the axial zone of the Eastern Cordillera, the structure of the eastern fl ank of the Usme syncline (south of Bogotá in Fig.…”

Section: Evidence Of Pre-neogene Deformationmentioning

confidence: 99%

“…The thickness of this unit is variable; there is a 1100 m depocenter near Bogotá, and it thins eastward to less than 450 m and northward to less than 300 m near the Santander massif (Fabre, 1981;Royero, 2001). Maastrichtian-lower Paleocene units in the Magdalena Valley include conglomeratic units derived from the Central Cordillera to the south (Gómez et al, 2003), whereas to the north, carbonate silt and mudstones dominate (Gómez et al, 2005b). Maastrichtian strata are absent in the southern Llanos Basin (Bayona et al, 2006), in the frontal thrust sheets of the central Llanos foothills and Llanos Basin (Cooper et al, 1995), as well as along the frontal thrust sheets of the western fl ank of the Eastern Cordillera (Bayona et al, 2003).…”

Section: Tectono-stratigraphic Sequence One (Upper Maastrichtian To Lmentioning

confidence: 99%

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An integrated analysis of an orogen-sedimentary basin pair: Latest Cretaceous-Cenozoic evolution of the linked Eastern Cordillera orogen and the Llanos foreland basin of Colombia

Bayona¹,

Cortés

Jaramillo

et al. 2008

Geological Society of America Bulletin

146

142

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The integration of restored basin geometry and internal features of syntectonic units (e.g., stratal architecture, thickness, sandstone composition) with fl exural modeling of the lithosphere constrains the evolution of a basin and its fl exural history related to orogenic growth (spatial/temporal loading confi guration). Using this approach, we determined the Maastrichtian-Cenozoic polyphase growth of the Eastern Cordillera of Colombia, an inverted Mesozoic extensional basin. The record of this growth occurs in an Andean (post-middle Miocene) thrust belt (the Eastern Cordillera) and in adjacent foreland basins, such as the Llanos Basin to the east. This approach permitted the identification of fi ve tectono-stratigraphic sequences in the foreland basin and fi ve phases of shortening for the Eastern Cordillera. Thermochronological and geochronological data support the spatial and temporal evolution of the orogen-foreland basin pair. The geometry of tectonic loads, constrained by fl exural models, reveals shortening events of greater magnitude for the uppermost two sequences than for pre-middle Eocene sequences. Tectonic loads for the late Maastrichtian-middle Eocene phases of shortening were less than 3 km high and 100 km wide. For the late Eocene-middle Miocene phase, tectonic loads changed southward from 6 km to less than 4 km, and loads were wider to the north. The strong Andean inversion formed today's Eastern Cordillera structural confi guration and had equivalent tectonic loads of 10-11 km.Integrated analysis is necessary in polyphase orogenic belts to defi ne the spatial and temporal variation of tectonic load and foreland basin confi gurations and to serve studies that seek to quantify exhumation and threedimensional analyses of thrust belts. For the Bayona et al. 1172Geological Society of America Bulletin, September/October 2008 Eastern Cordillera, thermochronological sampling must span the width of the Eastern Cordillera rather than be concentrated in a single range.

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Section: Evidence Of Pre-neogene Deformationmentioning

confidence: 99%

Section: Evidence Of Pre-neogene Deformationmentioning

confidence: 99%

Section: Evidence Of Pre-neogene Deformationmentioning

confidence: 99%

Section: Tectono-stratigraphic Sequence One (Upper Maastrichtian To Lmentioning

confidence: 99%

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An integrated analysis of an orogen-sedimentary basin pair: Latest Cretaceous-Cenozoic evolution of the linked Eastern Cordillera orogen and the Llanos foreland basin of Colombia

Bayona¹,

Cortés

Jaramillo

et al. 2008

Geological Society of America Bulletin

146

142

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“…Estratigráficamente en el Campo Escuela Colorado se encuentra sobre la Formación Colorado (Gómez et al, 2008y Zafra, 2013) compuesta por intercalaciones de paquetes de areniscas de grano fino a medio y lodolitas rojizas con meteorización esferoidal, las areniscas presentan estratificación cruzada, paralela y sub-paralela, con espesores que varían entre 30 a 70 cm y las lodolitas rojizas entre 10 a 20 cm. según Caballero et al (2010).…”

Section: Introductionunclassified

Aplicación del método de inversión usando mínimos cuadrados (DLS) para el procesamiento de sondeos eléctricos verticales en Campo Escuela Colorado (Santander) – Caso de estudio

Goyes-Peñafiel¹,

Diaz²,

Umaña³

2017

revuin

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Este artículo puede compartirse bajo la licencia CC BY-ND 4.0 (https://creativecommons.org/licenses/by-nd/4.0/)Y.P Goyes Peñafiel, G Jiménez Diaz, R Mier Umaña. "Aplicación del método de inversión usando mínimos cuadrados (dls) para el procesamiento de sondeos eléctricos verticales en campo escuela colorado (Santander) -caso de estudio", UIS Ingenierías, vol. RESUMENEn el método de resistividad eléctrica se inducen corrientes eléctricas en el subsuelo y se mide la diferencia de potencial en la superficie. En un subsuelo con capas de diferentes características físicas, las medidas de resistividad y sus respectivas anomalías contribuyen con la prospección y caracterización de las propiedades eléctricas de los diferentes estratos. La resistividad es una de las propiedades físicas más variables, ya que se puede ver afectada por pequeños cambios del clima o irregularidades del subsuelo, para ciertos tipos de materiales, el agua puede modificar sus propiedades eléctricas; en suelos saturados o con niveles freáticos, la resistividad de un material tiende a disminuir. La distribución de los rangos de resistividad más bajos se analiza para diferentes puntos con el fin de estimar una distribución superficial de estos niveles saturados. En Campo Escuela Colorado se realizó un levantamiento de 8 sondeos eléctricos verticales, el procesamiento e interpretación de los datos adquiridos se realizó por medio del desarrollo de una inversión usando mínimos cuadrados para estimar la resistividad real y profundidades que mejor se ajusten a un modelamiento de la curva teórica.Palabras Clave: Método eléctrico, Campo Escuela Colorado, sondeo eléctrico vertical, nivel freático, acuífero, inversión. ABSTRACTIn the resistivity method, artificially generated electric currents are introduced into the ground and the resulting potential differences are measured at the surface, in subsurface layers of different physical characteristics, resistivity measurements and their respective anomalies provide information on the form and electrical properties of subsurface inhomogeneities. Resistivity is one of the most variable physical properties because it can be affected by small changes in climate or subfloor, for certain types of materials, water can modify their electrical properties; in saturated soil or water tables, the resistivity of a material tends to decrease. The distribution of lower resistivity ranges for different points are analyzed in order to estimate a surface distribution of these saturated levels. At Colorado Field was survey eight vertical electrical sounding; processing and interpretation of acquired data is done through the development of an investment using least squares to estimate the actual resistivity and depths that are best suited to modeling the theoretical curve.

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GPS velocities and the construction of the Eastern Cordillera of the Colombian Andes

Mora‐Páez

Mencin

Molnár

et al. 2016

Geophysical Research Letters

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GPS velocities across the northeast trending Eastern Cordillera of Colombia show oblique convergence at 8.8 ± 1.7 mm/yr, consisting of 8.0 ± 1.7 mm/yr of right‐lateral strike‐slip shear along the mountain range and 3.7 ± 0.3 mm/yr of northwest southeast shortening. Faster convergence occurs only at the northeast end of the Cordillera, where its eastern edge trends northwest and the highest mountains lie. The strike‐slip shear corroborates geologic work suggesting such movement southwest and northeast of the range. Given the ~200 km width of the Eastern Cordillera, the ~100–150 km of crustal shortening inferred from balanced cross sections and implied by recent estimates of crustal thickness would require ~25–40 Myr of shortening at ~4 mm/yr. The present‐day GPS measurements, therefore, are inconsistent with the inference, based on paleobotanical observations that the entire Eastern Cordillera rose 1500–2500 m since 3–6 Ma and called for a different interpretation of those data.

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Syntectonic Cenozoic sedimentation in the northern middle Magdalena Valley Basin of Colombia and implications for exhumation of the Northern Andes

Cited by 115 publications

References 19 publications

An integrated analysis of an orogen-sedimentary basin pair: Latest Cretaceous-Cenozoic evolution of the linked Eastern Cordillera orogen and the Llanos foreland basin of Colombia

An integrated analysis of an orogen-sedimentary basin pair: Latest Cretaceous-Cenozoic evolution of the linked Eastern Cordillera orogen and the Llanos foreland basin of Colombia

Aplicación del método de inversión usando mínimos cuadrados (DLS) para el procesamiento de sondeos eléctricos verticales en Campo Escuela Colorado (Santander) – Caso de estudio

GPS velocities and the construction of the Eastern Cordillera of the Colombian Andes

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