Data on natural disasters of this part of the Andean margin, is only known since the earliest records of the chronicles written by the Spaniards in the conquest stage, this data has served to cataloging the major earthquakes and ENSO relatioships. The study of paleoseismicity require the application of classical geology concepts to the last deformation phase, the morphotectonic features or deformation generated by strong earthquakes or gradual tectonic deformation occurred in this particular case during the Pliocene-Quaternary. For the Lima area there is the identification and characterization of sedimentary structures generated by the seismic effect known as seismites, which correspond to unconsolidated fluvio torrential deposits, lacustrine deposits, amongst others; these deposits have a relative abundance of sedimentary structures linked to seismic events, the most common&nb...

The sedimentary Basins of the Jurassic half-superior of the Andes Power stations (Peru), with a rate of high sedimentation, they happened during a period of distension. The Arequipa Basin that was developed during the Jurassic one inferior to half, it presents characteristic morphological, sedimentológicas and tectonic that is typical of a «basin in distension.» One of these characteristics is the turbidityc filler those that present flows of graveness of exceptional thickness Megaturbidites, those that correspond to products of catastrophic events during the resedimentación.

The system Cretaceous in the Andes of the central Peru lies unconformity on lands of different ages, from the Precambrian until the upper Jurassic on which is presented in three big sequences: an lower sequence (Valanginian- Aptian) that belongs to the siliciclastics platform of the Goyllarisquizga Group and its equivalent ones lateral according to the places, in which a clear eastern provenience is denoted, likewise for the units stratigrphics that conform this great delta a deposit it is noticed in lateral onlap on the borders of the basin; a second sequence of the Albian-Turonian to the Campanian that belongs to a great platform carbonated (Jumasha; Chonta formations and equivalents) and the third sequence to the end of the upper Cretaceous (Campanian-Maestrichtian) composed by the continental red beds that belong to processes of tectonic inversion and transition to foreland basins. D...

Las cuencas sedimentarias del Jurásico medio-superior de los Andes Centrales (Perú), con una tasa de sedimentación alta, ocurrieron durante un periodo de distensión. La Cuenca de Arequipa, que se desarrolló durante el Jurásico inferior a medio, presenta características morfológicas, sedimentológicas y tectónicas que son típicas de una «cuenca en distensión». Una de estas características es el relleno turbidítico, los que presentan flujos de gravedad de excepcional espesor Megaturbiditas, los que corresponden a productos de eventos catastróficos durante la resedimentación.

The system Cretaceous in the Andes of the central Peru lies unconformity on lands of different ages, from the Precambrian until the upper Jurassic on which is presented in three big sequences: an lower sequence (Valanginian- Aptian) that belongs to the siliciclastics platform of the Goyllarisquizga Group and its equivalent ones lateral according to the places, in which a clear eastern provenience is denoted, likewise for the units stratigrphics that conform this great delta a deposit it is noticed in lateral onlap on the borders of the basin; a second sequence of the Albian-Turonian to the Campanian that belongs to a great platform carbonated (Jumasha; Chonta formations and equivalents) and the third sequence to the end of the upper Cretaceous (Campanian-Maestrichtian) composed by the continental red beds that belong to processes of tectonic inversion and transition to foreland basins. D...

Data on natural disasters of this part of the Andean margin, is only known since the earliest records of the chronicles written by the Spaniards in the conquest stage, this data has served to cataloging the major earthquakes and ENSO relatioships. The study of paleoseismicity require the application of classical geology concepts to the last deformation phase, the morphotectonic features or deformation generated by strong earthquakes or gradual tectonic deformation occurred in this particular case during the Pliocene-Quaternary. For the Lima area there is the identification and characterization of sedimentary structures generated by the seismic effect known as seismites, which correspond to unconsolidated fluvio torrential deposits, lacustrine deposits, amongst others; these deposits have a relative abundance of sedimentary structures linked to seismic events, the most common&nb...

3 páginas

En la zona subandina de la región de La Convención (Dpto. de Cusco), aflora una sucesión completa del Paleozoico inferior que va desde el Ordovícico al Devónico, casi sin interrupción alguna, es en los afloramientos de Ordovícico medio correspondientes al Grupo San José compuesta por una monótona litología (areniscas y lutitas de coloración gris a gris oscura), donde se puede reconocer deformaciones de desestabilización submarina, los que sumado a su potente sucesión corresponderían a una época extensional.

173 p.

226 p.

71 páginas, 3 mapas.

La génesis de carbones peruanos dependió del clima y geomorfología que a su vez eran controladas por la geotectónica. Las transformaciones posteriores de carbones están vinculadas con el desarrollo de la tectónica local y global. Por esto el estudio de los carbones peruanos y de sus cuencas debe ocuparse con todas las etapas de su génesis y transformación. Con esto el estudio del carbón y de sus cuencas contribuirá a la compresión integral de la historia geológica del Perú y puede aportar al conocimiento de geotectónica global. Los tres períodos cortos durante los cuales se cumplían las condiciones requeridas necesarias para la formación de los depósitos de carbón son los siguientes: 1) Misisipano Inferior hace unos 330 Ma. (Viseano). 2) Cretáceo de 140 a 130 Ma (del Beriasiano a Valanginiano Inferior) 3) Neógeno (principalmente Mioceno) y Cuaternario durante los úl...

The East Pisco basin belongs to the group of basins of the Peruvian forearc. This basin has been studied based on the description and interpretation of excellent outcrops along the coast. the East Pisco basin in its offshore area is characterized by a complex tectonic history which has been interpreted in this study with subsurface information (2D-3D seismic) and integrated with the geological information of the coastal sector. This paper shows the interpretation of seismic horizons corresponding to stratigraphic units, the main fault, and folding systems. The main structural styles of the basin are determined, and a model of tectonic evolution is proposed.

80 páginas, 4 mapas.

44 páginas, 1 mapa.

6 páginas

[ESP] La Cuenca Camaná-Mollendo es una depresión elongada ~NO-SE formada en un margen activo, el cual se extiende desde la Cordillera de la Costa del sur de Perú hasta la fosa Perú-Chile. Esta cuenca contiene la Formación Camaná del Cenozoico. Una integración de datos recopilados de columnas estratigráficas, análisis de proveniencia sedimentaria, geocronología U-Pb en zircones y nuevas interpretaciones sísmicas 2D (offshore) permitió elaborar un esquema tectonoestratigráfico de toda la Cuenca Camaná-Mollendo hasta el offshore de Arequipa y Tacna. Los resultados permiten afirmar que la Fm. Camaná consiste en deltas de grano grueso (Unidad CamA, Oligoceno-Mioceno medio) sobreyacidas por conglomerados fluviales (Unidad CamB, Mioceno superior-Plioceno). Estas unidades han sido identificadas en las secciones sísmicas del offshore, donde los deltas de grano grueso se hacen más...

Páginas 53-77.

Páginas 842-844.

Damos a conocer edades inéditas obtenidas por los métodos 40Ar-39Ar y K-Ar sobre rocas volcánicas y plutónicas del sur del Perú, y las comentamos brevemente.