Sedimentacion sintectonica asociada a las estructuras neogenas en la Precordillera de la zona de Moquella, Tarapaca (19°15'S, norte de Chile).
Syntectonic sedimentation associated with Neogene structures in the Precordillera of Moquella Zone, Tarapacá (19°15'S, northern Chile).
| dc.contributor | en-US | |
| dc.contributor | es-ES | |
| dc.creator | Pinto, Luisa | |
| dc.creator | Herail, Gerard | |
| dc.creator | Charrier, Reynaldo | |
| dc.date | 2010-06-29 | |
| dc.identifier | http://www.andeangeology.cl/index.php/revista1/article/view/V31n1-a02 | |
| dc.identifier | 10.5027/andgeoV31n1-a02 | |
| dc.description | En el norte de Chile (18-20°S), el borde occidental del alto Plateau andino (Altiplano) fue alzado por un sistema de fallas inversas de alto angulo y pliegues asociados. Este se desarrollo a lo largo de la Precordillera, que corresponde a la unidad morfoestructural que conecta al Altiplano, al este, y la Depresion Central, al oeste. En la zona de Moquella (19,3°S), ese sistema estructural esta representado por una flexura (Flexura Moquella) y depositos sintectonicos asociados. Esta flexura fue causada por una falla inversa, ciega y con vergencia al oeste, que estuvo activa, al menos, entre los 21 Ma y 16 Ma. Acomodo un total aproximado de 700 m del alzamiento del borde occidental del Plateau andino, contribuyendo de esta manera a casi un 20% de su alzamiento. Los depositos sintectonicos, de 300-400 m de espesor, corresponden a una sucesion sedimentaria y volcanica neogena, denominada Formacion Latagualla, expuesta en la Depresion Central hasta el borde occidental de la Precordillera. Esta formacion registro parte de la deformacion y la erosion neogena del borde occidental del Plateau andino a esta latitud. Las evidencias de su caracter sintectonico corresponden a su geometria en estratos de crecimiento asociados a la flexura. Ademas, sobre el eje de la Flexura Moquella se produjeron deslizamientos de grandes dimensiones que tambien han sido reconocidos mas al norte, en Arica, indicando ser un fenomeno caracteristico de este borde de los Andes. | es-ES |
| dc.description | In northern Chile (18-20°S), the western border of the high Andean Plateau (Altiplano) was uplifted by high-angle thrust faults and associated folds. These developed along the Precordillera, which is the morphostructural unit that connects the Andean Plateau, to the east, with the Central Depression, to the west. In the area of Moquella (19,3°S), this structural system is represented by a flexure (Moquella Flexure) and associated syntectonic deposits. The flexure was caused by a blind west-vergent thrust-fault which remained active, at least, between 21 Ma and 16 Ma. It accommodated approximately 700 m of the uplift of the western edge of the Andean Plateau, thereby contributing to 20% of the total uplift. The syntectonic deposits are represented by a 300-400 m thick, Neogene sedimentary and volcanic succession, referred to as Latagualla Formation, exposed in the Central Depression and extending up to the western border of the Precordillera. Part of the Neogene deformation and erosion of the western border of the Andean Plateau was recorded by deposits of this formation. The syntectonic trait of Latagualla Formation is evidenced by growth strata geometries associated with the flexure. In addition, large-scale landslides occurred along the flexural axis, being widely recognized also northward at the latitude of Arica, suggesting a regional extent for these phenomena. | en-US |
| dc.format | application/pdf | |
| dc.format | text/html | |
| dc.language | eng | |
| dc.publisher | Servicio Nacional de Geología y Minería | en-US |
| dc.relation | http://www.andeangeology.cl/index.php/revista1/article/view/V31n1-a02/587 | |
| dc.relation | http://www.andeangeology.cl/index.php/revista1/article/view/V31n1-a02/html | |
| dc.source | Andean Geology; Vol 31, No 1 (2004); 19-44 | es-ES |
| dc.source | Andean Geology; Vol 31, No 1 (2004); 19-44 | en-US |
| dc.source | 0718-7106 | |
| dc.source | 0718-7092 | |
| dc.title | Sedimentacion sintectonica asociada a las estructuras neogenas en la Precordillera de la zona de Moquella, Tarapaca (19°15'S, norte de Chile). | es-ES |
| dc.title | Syntectonic sedimentation associated with Neogene structures in the Precordillera of Moquella Zone, Tarapacá (19°15'S, northern Chile). | en-US |
| dc.type | info:eu-repo/semantics/article | |
| dc.type | info:eu-repo/semantics/publishedVersion | |
| dc.type | es-ES | |
| dc.type | en-US |
This item appears in the following Collection(s)
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Andean Geology
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