Towards deciphering the Cenozoic evolution of the East Pisco Basin (southern Peru)

Celma, Claudio Di; Pierantoni, Pietro Paolo; Volatili, Tiziano; Molli, Giancarlo; Mazzoli, Stefano; Sarti, Giovanni; Ciattoni, Sara; Bosio, Giovanni; Malinverno, Elisa; Collareta, Alberto; Gariboldi, Karen; Gioncada, Anna; Jablonskà, Danica; Landini, Walter; Urbina, Mario; Bianucci, Giovanni

doi:10.1080/17445647.2022.2072780

Cited by 13 publications

(5 citation statements)

References 81 publications

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“…So, the computed thermal structure seems to be in contrast with the geological setting. Taking into consideration the constraints under which the structural model has been set up [3,8,[27][28][29][30][31][32]34,35] and the relationship between the surface heat flow (Q s ) values observed [16][17][18] and the ones computed using the analytical procedure, we believe that the presence of the thermal dome may be linked to some density anomaly in the area. Indeed, in the analytical procedure, we consider the density of the basement as constant.…”

Section: Discussionmentioning

confidence: 99%

“…For the shallowest part of the section, we used geological data and maps freely available on the INGEMMET website. Since there are no freely available geophysical data for this area, the geological section was constructed considering previously published geological sections of adjacent areas [34,35]. For simplification, we considered the whole lithosphere as composed of three main geological units: crystalline basement (B), Cenozoic-Mesozoic sedimentary cover (SC_1), and Paleozoic sedimentary cover (SC_2).…”

Section: Lithospheric Modelmentioning

confidence: 99%

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Two-Dimensional Geothermal Model of the Peruvian Andes above the Nazca Ridge Subduction

Ciattoni,

Mazzoli,

Megna

et al. 2023

Energies

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The aseismic Nazca Ridge produces localized flat-slab subduction beneath the South American margin at latitudes 10° to 15° S. The geological evolution and the spatio-temporal pattern of deformation of the upper plate have been strongly influenced by the presence of the flat slab. In this study, we investigated the lithospheric thermal structure of this region by elaborating a 2D geothermal model along a section across the top of the Nazca Ridge, the Peru–Chile trench, the Andean Cordillera, and the Amazonian Basin, for a total length of 1000 km. For the sake of modelling, the crust of the overriding plate was subdivided into two parts, i.e., a sedimentary cover (including the entire lithostratigraphic sequence) and a crystalline basement. Applying an analytical methodology, we calculated geotherms and isotherms by setting (i) thickness, (ii) density, (iii) heat production, and (iv) thermal conductivity for each geological unit and considering (v) heat flux at the Moho, (vi) frictional heating produced by faults, and (vii) plate convergence rate. The resulting model could make a significant advance in our understanding of how flat slab geometry associated with the Nazca Ridge subduction affects the thermal structure and hence the tectonic evolution of the region.

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Section: Discussionmentioning

confidence: 99%

Section: Lithospheric Modelmentioning

confidence: 99%

Two-Dimensional Geothermal Model of the Peruvian Andes above the Nazca Ridge Subduction

Ciattoni,

Mazzoli,

Megna

et al. 2023

Energies

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“…Mientras León et al (2008) identifica en la parte continental de la cuenca Pisco Este, periodos de levantamiento y posterior extensión en el Mioceno medio. Di Celma et al (2022) propone una erosión parcial o disección de la "mega-secuencia P" por un proceso de levantamiento en el Oligoceno tardío, Mioceno medio en la parte continental de la cuenca Pisco Este.…”

Section: Interpretación Y Discusiónunclassified

Estilo estructural y modelo de evolución tectónica, cuenca Pisco Este, costa afuera - Perú

Peña Sierra,

Del Valle Jurado,

Jacay Huarache

2023

Rev. Inst. investig. Fac. minas metal cienc. geogr

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La cuenca Pisco Este pertenece al conjunto de cuencas del antearco peruano. Lo que se conoce de esta cuenca proviene de la descripción e interpretación de excelentes afloramientos a lo largo de la costa. El sector costa afuera de la cuenca Pisco Este se caracteriza por tener una historia tectónica compleja la cual ha sido interpretada en este estudio basado en la información de subsuelo (sísmica 2D-3D) e integrada con la información geológica del sector costero. Se interpretaron horizontes sísmicos correspondientes a unidades estratigráficas, los principales sistemas de fallas y plegamiento. Se interpretan principalmente 3 intervalos de deformación de la cuenca, se determinan los principales estilos estructurales y se propone un modelo de evolución tectónica.

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“…The East Pisco Basin is a 180 km-long, northeastward trending Andean forearc basin that extends along the narrow coastal plain of Peru between Pisco and Nazca [30][31][32][33] (Figure 1a). The sedimentary infill of this basin includes, in ascending stratigraphic order, the lower Palaeogene Caballas Formation, the Eocene Paracas Formation, the Eo-Oligocene Otuma Formation, the Lower Miocene Chilcatay Formation and the Mio-Pliocene Pisco Formation [34][35][36][37]. These stratal packages are bounded by regionally extensive angular unconformities demarcated by pavements of igneous, pebble-to boulder-sized clasts that testify to periods of subaerial exposure and indicate major breaks in sedimentation [35,38].…”

Section: Geological and Palaeontological Frameworkmentioning

confidence: 99%

“…Years of geological campaigning throughout the Ica Desert have led to recognizing that the Pisco Formation consists of three sequences/allomembers, designated P0 to P2 in ascending stratigraphic order, which progressively onlap northeastward onto a composite basal unconformity; each Pisco sequence/allomember is made of a coarse-grained lower portion, reflecting inshore deposition, fining upwards into offshore sediments [37,38,43,92] (Figure 1b).…”

Section: X For Peer Review 3 Of 17mentioning

confidence: 99%

Ghosts of the Holobiont: Borings on a Miocene Turtle Carapace from the Pisco Formation (Peru) as Witnesses of Ancient Symbiosis

Collareta

Varas-Malca

Bosio

et al. 2022

JMSE

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In spite of the widespread occurrence of epibiotic turtle barnacles (Coronuloidea: Chelonibiidae and Platylepadidae) on extant marine turtles (Chelonioidea: Cheloniidae and Dermochelyidae), and although the association between these cirripedes and their chelonian hosts has existed for more than 30 million years, only a few studies have investigated the deep past of this iconic symbiotic relationship on palaeontological grounds. We describe probable platylepadid attachment scars in the form of hemispherical/hemiellipsoidal borings on an Upper Miocene (Tortonian) fragmentary turtle carapace, identified herein as belonging to Cheloniidae, from the Pisco Lagerstätte (East Pisco Basin, southern Peru). When coupled with the available molecular data, this and other similar ichnofossils allow for hypothesising that platylepadid symbionts were hosted by sea turtles as early as in early Oligocene times and became relatively widespread during the subsequent Miocene epoch. Chelonian fossils that preserve evidence of colonisation by platylepadid epibionts in the form of pits on the turtle shell should be regarded as fossil holobionts, i.e., palaeontological witnesses of discrete communal ecological units formed by a basibiont and the associated symbionts (including the epibiota). A greater attention to the bone modifications that may be detected on fossil turtle bones is expected to contribute significantly to the emerging field of palaeosymbiology.

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Towards deciphering the Cenozoic evolution of the East Pisco Basin (southern Peru)

Cited by 13 publications

References 81 publications

Two-Dimensional Geothermal Model of the Peruvian Andes above the Nazca Ridge Subduction

Two-Dimensional Geothermal Model of the Peruvian Andes above the Nazca Ridge Subduction

Estilo estructural y modelo de evolución tectónica, cuenca Pisco Este, costa afuera - Perú

Ghosts of the Holobiont: Borings on a Miocene Turtle Carapace from the Pisco Formation (Peru) as Witnesses of Ancient Symbiosis

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