Victor A. Valencia

Victor A. Valencia
Washington State University | WSU · School of the Environment

PhD

About

207
Publications
89,428
Reads
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8,486
Citations
Citations since 2016
38 Research Items
5462 Citations
20162017201820192020202120220200400600800
20162017201820192020202120220200400600800
20162017201820192020202120220200400600800
20162017201820192020202120220200400600800
Additional affiliations
January 2005 - January 2010
The University of Arizona
Position
  • Researcher

Publications

Publications (207)
Article
New detrital zircon petrochronological data (~380 analysed grains), including U-Pb dating, trace element, and isotopic analyses from modern sediments and Oligocene-Miocene strata, cropping out along the western slope of the Baudó Range in the northern Pacific coast of Colombia (Tribugá and Cupica Gulfs), are used to assess the nature of Cretaceous...
Article
The Río Damas Formation is an Upper Jurassic volcano-sedimentary succession, whose outcrops are largely distributed between 33°S and 35.30°S in Chile and Argentina, as part of the retroarc Neuquén Basin fill. This unit was deposited during an important marine regressive phase of the basin. We studied the Río Damas Formation exposures at the Los Gat...
Article
Full-text available
A key event in the paleogeographic evolution of the Austral-Magallanes foreland basin was the Santonian-Maastrichtian continentalization, marked by the appearence of deltaic, fluvial and wetland sequences stacked on top of deep marine deposits. The expanding ecological niche was exploited by theropods and influenced the evolutionary history of dino...
Article
The subsidence/uplift patterns of forearc basins are controlled by subduction dynamics and are strongly dependent on the nature of the margin (erosive vs. accretionary). Here, we explore the role that increased megathrust shear force plays in triggering and sustaining the short wavelength topography of coastal forearc regions at erosive margins, wh...
Conference Paper
Full-text available
The uplift and early exhumation of orogens can be investigated using the sedimentary provenance of adjacent foreland basins. Cenozoic exhumation and uplift of the northern Andes and the concurrent formation of the flexural Putumayo Basin to the east allow using its sedimentary record to investigate the modes of Andean exhumation. We carried out mul...
Article
Full-text available
The tectonic opening of the Tasmanian Gateway and Drake Passage represented crucial geographic requirements for the Cenozoic development of the Antarctic Circumpolar Current (ACC). Particularly the tectonic complexity of Drake Passage has hampered the exact dating of the opening and deepening phases, and the consequential onset of throughflow of th...
Presentation
La Formación Mesa es una sucesión volcaniclástica de edad Plio-Pleistocena que aflora en el extremo sur del Valle Medio del Magdalena (Piedemonte oriental de la Cordillera Central), entre las localidades de Honda-Mariquita, y suprayace concordantemente las rocas sedimentarias superiores de la Formación San Antonio (Grupo Honda). Esta unidad está co...
Article
Full-text available
The Maastrichtian clastic record of the Cimarrona Formation on the western flank of the Colombian Eastern Cordillera documents the erosion of a generated topography and is associated with the beginning of the Andean orogeny during the Late Cretaceous-Paleocene. Sedimentary provenance analyzes (conglomerate clast count, sandstone petrography, heavy...
Chapter
Full-text available
The Cretaceous tectonic evolution of the western margin of South America involves a shift from an extensional convergent margin toward a more compressional setting that marks the beginning of the Andean Orogeny. In the Colombian Andes, this changing scenario is recorded in the Cretaceous sedimentary and magmatic rocks of the Central Cordillera. A r...
Article
Full-text available
Geochemical and geochronological data reveal that late Oligocene-early Miocene time is a break point in the evolution of Andean magmatism. The Patagonian Andes registered the onset of arc volcanism since the late Eocene forming part of the El Maitén Belt, whose development was driven by the subduction of the Farallon/Nazca plates beneath the Andean...
Poster
La Formación Cimarrona de edad Maastrichtiano Tardío está compuesta principalmente por conglomerados y areniscas conglomeráticas, con pocos paquetes de lodolitas, la cuales han sido asociadas con facies sedimentarias afines a ambientes de abanico deltaico (Gómez y Pedraza, 1994). Análisis de procedencia previos (p.e. paleocorrientes y presencia de...
Article
The Malvinas basin, emplaced offshore southern Patagonia, is an asymmetric extensional basin formed by NNW-striking faults. In this contribution we present a review and updated structural framework for the Malvinas basin, together with two new U-Pb zircon ages for the synrift series. By extrapolation from the neighboring Austral basin, the Middle J...
Article
Full-text available
The Andes are thought to be formed through discrete contractional stages separated by periods of little to no orogenic construction. This paper analyzes the intervals between the main contractional phases that built the Southern Central Andes between 35° and 37°S in order to determine whether they were characterized by neutral, contractional or ext...
Conference Paper
Full-text available
Recent works documented that the giant heavy oil accumulations of Castilla and Chichimene may have been associated with a bigger stratigraphic accumulation at the level of the so called T2 reservoir. In this work we present further evidence that reinforces this view. Mapping the T2 reservoir to the south and its pinch-outs allowed us to detect the...
Article
Full-text available
The Aptian-Albian Caballos Formation is a proven reservoir in the oil producing basins of the Upper Magdalena Valley and Putumayo (Colombia), characterized by wide variation in its petrophysical properties. Integrated provenance, diagenetic and basic petrophysical analyses are presented from two stratigraphic sections of the Caballos Formation in t...
Article
Desertification of Central Patagonia began between ~14–12 Ma and therefore was not directly connected to the opening of the Drake Passage and initial conformation of the Antarctica ice cap in early Miocene times. Local processes, in particular the uplift of the Southern Andes, seem to have played a major role in climatic and biotic changes. We stud...
Data
This is the complete geochonological data from our article in 2017 in tectonophysics
Conference Paper
La desertificación de la Patagonia central ocurrió desde ~10 Ma de una manera no directamente conectada con la apertura del Paso Drake y la conformación inicial de la capa de hielo de la Antártida en tiempos del Mioceno temprano, tal como sucedió en otras masas continentales australes. Los procesos locales, en particular el levantamiento de los And...
Article
The spatio-temporal, compositional and deformational record of magmatic arcs are sensible markers of the long-term evolution of convergent margins including collisional events. In this contribution, field relations, U-Pb LA-ICP-MS zircon geochronology from magmatic and sedimentary rocks, and whole-rock geochemistry from volcanic and plutonic rocks...
Article
Between the Late Cretaceous and Paleogene, the Northern Andes experienced subduction and collision due to the convergence between the oceanic Caribbean Plate and the continental margin of Ecuador and Colombia. Subduction-related calc-alkaline plutonic rocks form stocks of limited areal expression or local batholiths that consist mostly of diorites...
Article
Full-text available
The onset of subduction in the Caribbean Plate under the South American Plate allowed the development of an Active Continental Margin; the age of onset, the mechanism and the plates involved are a discussion topic, especially at the Colombian South Caribbean Margin, due to the lack of geological information related to the basement. This article int...
Article
Global-scale Palaeozoic plate tectonic reconstructions have suggested that Laurentia was obliquely approaching against the northwestern margin of Gondwana until the final agglutination of Pangea. In this contribution integrated petrographic analysis, heavy mineral analysis, and tourmaline geochemistry were done, and U–Pb detrital zircon geochronolo...
Article
The North Patagonian fold-thrust belt (41°–44° S) is characterized by a low topography, reduced crustal thickness and a broad lateral development determined by a broken foreland system in the retroarc zone. This particular structural system has not been fully addressed in terms of the age and mechanisms that built this orogenic segment. Here, new f...
Article
Full-text available
New field data, geochemical analyses and zircon U-Pb LA-ICP MS data were obtained on plutonic and volcanic rocks of the Mocoa Batholith and Saldaña Formation in southern Colombia Putumayo region. Results suggest that the plutonic and volcanic activities are closely related to a common magmatic history. This volcano-plutonic association presents a w...
Article
Full-text available
The Chilean margin has been used as the model of an ocean-continent convergent system dominated by compression and active mountain building as a consequence of the strong mechanical coupling between the upper and the lower plates. The Andean Cor-dillera, however, shows evidence of alternating phases of compressional and extensional deformation. Vol...
Conference Paper
Full-text available
Resumen The Andean Cordillera shows evidence of alternating phases of compressional and extensional deformation. Volcano-sedimentary marine strata in the Aysén region of southern Chile were investigated to better understand the causes of extensional tectonics and crustal thinning that occurred in the Andean orogeny as these deposits constitute the...
Article
Full-text available
Plateau related rocks accreted to the Caribbean plate margins provide insights into the understanding of the intra-oceanic evolution of the Caribbean plate and its interaction with the continental margins of the Americas. Petrologic, geochemical and isotope (Sr and Nd) data were obtained in rocks from the Santa Fé Gabbro-Tonalite and Buriticá Tona...
Article
Full-text available
A B S T R A C T New biostratigraphic zonations, core descriptions, sandstone petrography, facies analysis, and seismic information are compared with published detrital and bedrock geo-and thermochro-nology to build a Cenozoic paleogeographic reconstruction of the Andean retroarc region of Colombia, encompassing the ancestral Central Cordillera, Mid...
Article
Full-text available
Keywords: Patagonia Early Cretaceous Patagonian Andes Austral basin Magallanes basin Opening of the Atlantic Ocean UPb geochronology Detrital zircons a b s t r a c t The end of the Early Cretaceous sag stage along the Southern Patagonian Andes is indicated by the sudden appearance of shallow marine to deltaic sandstones on top of deep marine facies...
Article
Full-text available
Andean orogenic processes controlled the spatial and temporal distribution of the magmatic and sedimentary record. This contribution integrates new U/Pb zircon ages, heavy mineral analyses and biostratigraphic constraints from the Neogene sedimentary record of the fore-arc and intra-arc basins and volcano-plutonic rocks of southwestern Colombia, in...
Conference Paper
Full-text available
Geological studies carried out on the Palaeogene San Cayetano, Maco and San Jacinto clastic sedimentary formations, which crop out in different sectors of the San Jacinto Fold Belt (Caribbean Colombian Region), show a variety of igneous clasts belonging to the basaltic andesites-andesites-dacites and basaltic trachiandesites-trachiandesites-trachid...
Article
Full-text available
The Zn-Pb-Cu(-Ag±Au) San Martín deposit in northwestern Zacatecas is one of the most economically important and biggest skarns in Mexico. Mineral associations in this deposit belong to the sulfide skarn type (with rather " classical " prograde and retrograde zones) and contain peripheral subepithermal to epithermal veins. Re-Os ages were obtained f...
Article
Full-text available
Uranium-lead geochronology in detrital zircons and provenance analyses in eight boreholes and two surface stratigraphic sections in the northern Andes provide insight into the time of closure of the Central American Seaway. The timing of this closure has been correlated with Plio-Pleistocene global oceanographic, atmospheric, and biotic events. We...
Article
Sediment-hosted copper-silver mineralization in the Raipas Supergroup of the Repparfjord tectonic window of Finnmark, northernmost Norway, is present in two main stratigraphic horizons at Nussir and Ulveryggen. The stratigraphically lower Ulveryggen deposit is hosted by irregular lenses of dominantly fluviatile sandstone and conglomerate, whereas t...
Article
The gondwanan magmatism in the San Rafael Massif, known as Choiyoi Magmatic Cycle, was emplaced during the inception of a magmatic arc setting during the early Permian. Two different sections can be differentiated in this volcanic sequence. The lower section (∼281 up to ∼265 Ma) consisting of andesites and dacitic to low-silica rhyolitic ignimbrite...
Article
Full-text available
Two porphyry Cu-Mo prospects in northern Sonora, Mexico (Fortuna del Cobre and Los Humos) located within the southwestern North American porphyry province have been dated in order to constrain the timing of crystallization and mineralization of these ore deposits. In Fortuna del Cobre, the pre-mineralization granodiorite porphyry yielded an U-Pb zi...
Conference Paper
Full-text available
Continental growth in convergent margins is related with different episodes and tectonic processes like long or short-lived subduction systems, extensional regimes and marginal basins development, volcanic front migration caused by obliquity or convergence geometry fluctuations, accretionary and collisional events, etc. Each of the aforementioned g...
Article
Full-text available
New U-Pb detrital zircon data of metasedimentary rocks of the Aguapeí Group, SW Amazonian Craton, are presented in this work. Three samples were analyzed by ICPMS laser ablation in order to estimate the age of the source areas of the sediments and the maximum depositional age of the basin. The samples show an Archean age of 2515 Ma not yet reported...
Article
Full-text available
Upper Cretaceous marine rocks crop out along the Pacific coast of central and south-central Chile between 33 degrees and 37 degrees S. These strata constitute an important reference for the Upper Cretaceous of South America due to their diverse fossil fauna and flora. The type unit of these deposits is the Quiriquina Formation, near Concepcion. Thi...
Article
Full-text available
During Valanginian-Hauterivian time, La Casita Formation (Monterrey trough) and the Patula Arkose (Sabinas basin) formed sedimentary units distributed in the southeast and northeast edge of the Coahuila block. The present article discriminates the character of the different geotectonic elements that form northeastern Mexico and integrates petrograp...
Article
Full-text available
During Valanginian-Hauterivian time, La Casita Formation (Monterrey trough) and the Patula Arkose (Sabinas basin) formed sedimentary units distributed in the southeast and northeast edge of the Coahuila block. The present article discriminates the character of the different geotectonic elements that form northeastern Mexico and integrates petrograp...
Conference Paper
Full-text available
Marine Cenozoic strata crop out in the western flank of the North Patagonian Andes at Lago Ranco (40°S) and Ayacara (42°S). These deposits, known as the Estratos de Lago Ranco and Ayacara formations, consist of rhythmic successions of sandstone and siltstone. In order to unravel the sedimentary environment, age, and tectonic history of this area du...
Conference Paper
Full-text available
Varias unidades de corteza continental afloran en la Mesa deCocodite, localizada en el centro de la Península de Paraguaná, al noroeste de Venezuela (Fig. 1). Estas incluyen una nueva unidad cartografiada de gneis cuarzofeldespático probablemente intruida (las relaciones de campo no están claras) por el Plutón de El Amparo (de edad Pérmico con meta...
Conference Paper
Full-text available
Durante diversos reconocimientos geológicos en la Cordillera de la Costa se han realizado hallazgos de rocas metaígneas exóticas dentro de unidades metasedimentarias. Las localidades estudiadas son: (1) Quebrada Canoas, al oeste de Hoyo de la Puerta, donde aflora el Esquisto de Las Mercedes, cuya sección ha sido estudiada por URBANI et al.(2012)....