Astronomically-tuned cyclicity in the alluvial sediments of the Guadix Basin (Betic Cordillera, S Spain). / Pla Pueyo, Sila; Soria, Jesús M.; Viseras, César; Henares, Saturnina; Tent Manclús, José E.

2011. 101 Abstract from 28th IAS Meeting of Sedimentology, Zaragoza, Spain.

Research output: Contribution to conferenceAbstract

Published

Standard

Astronomically-tuned cyclicity in the alluvial sediments of the Guadix Basin (Betic Cordillera, S Spain). / Pla Pueyo, Sila; Soria, Jesús M.; Viseras, César; Henares, Saturnina; Tent Manclús, José E.

2011. 101 Abstract from 28th IAS Meeting of Sedimentology, Zaragoza, Spain.

Research output: Contribution to conferenceAbstract

Harvard

Pla Pueyo, S, Soria, JM, Viseras, C, Henares, S & Tent Manclús, JE 2011, 'Astronomically-tuned cyclicity in the alluvial sediments of the Guadix Basin (Betic Cordillera, S Spain)', 28th IAS Meeting of Sedimentology, Zaragoza, Spain, 5/07/11 - 8/07/11 pp. 101. <http://www.sedregroup.com/>

APA

Pla Pueyo, S., Soria, J. M., Viseras, C., Henares, S., & Tent Manclús, J. E. (2011). Astronomically-tuned cyclicity in the alluvial sediments of the Guadix Basin (Betic Cordillera, S Spain). 101. Abstract from 28th IAS Meeting of Sedimentology, Zaragoza, Spain. http://www.sedregroup.com/

Vancouver

Pla Pueyo S, Soria JM, Viseras C, Henares S, Tent Manclús JE. Astronomically-tuned cyclicity in the alluvial sediments of the Guadix Basin (Betic Cordillera, S Spain). 2011. Abstract from 28th IAS Meeting of Sedimentology, Zaragoza, Spain.

Author

Pla Pueyo, Sila ; Soria, Jesús M. ; Viseras, César ; Henares, Saturnina ; Tent Manclús, José E. / Astronomically-tuned cyclicity in the alluvial sediments of the Guadix Basin (Betic Cordillera, S Spain). Abstract from 28th IAS Meeting of Sedimentology, Zaragoza, Spain.1 p.

BibTeX

@conference{8d7a2530737d448599712961509d3dee,
title = "Astronomically-tuned cyclicity in the alluvial sediments of the Guadix Basin (Betic Cordillera, S Spain)",
abstract = "In the central sector of the Guadix Basin (southern Spain) a cyclic pattern can be inferred from theinterbedding of different continental sediments. Those sediments, Late Pliocene to Quaternary in age, consist ofalluvial fan and fluvial-lacustrine deposits. During this time span, the basin was endoreic and characterized by amarginal border of alluvial fans connecting transversally with an axial valley.The marginal alluvial fan system (so-called Internal Transverse System, ITS) giving the cyclic interbeddingsourced from the Sierra Nevada area (the main relief of the Betic Cordillera) and connected transversally withthe fluvial-lacustrine facies of the longitudinal system (the Axial System, AS).The ITS was made up of a series of large alluvial fans deposited by a network of low sinuosity channels,coalescing between them to form a bajada system. The alluvial fans had a large radius (10-11 km), over half thewidth of the basin (which was locally 15 km wide), since they lay against the tectonically active margin of thebasin (meaning a high sediment supply/subsidence ratio).At least sixteen progradation phases of the ITS fans into the AS facies have been identified in the centralsector of the Guadix Basin. Although the facies of both systems were connected laterally, the soft slope of theprogradations (almost subhorizontal) resulted in a vertical alternation of the reddish sediments of the transversealluvial fans and the greyish to white fluvio-lacustrine sediments of the axial drainage system.The estimated age for this alternation is based on the previous data provided by litho-, bio- andmagnetostratigraphic studies carried out in the area. This estimation gave an average value of 100 ka perprogradation phase. When correlating the alluvial fan progradation phases with the Laskar04 insolation curve,the estimated ages coincided in most of the cases with the eccentricity maxima peaks. This fact lead us toestablish a cyclicity of ca. 100 ka, falling into the band of Milankovitch high-frequency eccentricity. These phasesare interpreted to be the result of eccentricity maxima, during which winter periods would be longer and coolerand precipitation values would be higher. The increase in precipitation would enhance the erosion in the sourcearea of the alluvial fans, allowing them to prograde cyclically, invading the axial valley each 100 ka.",
keywords = "cyclicity, ALLUVIAL FANS, Guadix Basin, Pliocene, Pleistocene, Quaternary, continental, sediments",
author = "{Pla Pueyo}, Sila and Soria, {Jes{\'u}s M.} and C{\'e}sar Viseras and Saturnina Henares and {Tent Mancl{\'u}s}, {Jos{\'e} E.}",
year = "2011",
language = "English",
pages = "101",
note = "28th IAS Meeting of Sedimentology ; Conference date: 05-07-2011 Through 08-07-2011",

}

RIS

TY - CONF

T1 - Astronomically-tuned cyclicity in the alluvial sediments of the Guadix Basin (Betic Cordillera, S Spain)

AU - Pla Pueyo, Sila

AU - Soria, Jesús M.

AU - Viseras, César

AU - Henares, Saturnina

AU - Tent Manclús, José E.

PY - 2011

Y1 - 2011

N2 - In the central sector of the Guadix Basin (southern Spain) a cyclic pattern can be inferred from theinterbedding of different continental sediments. Those sediments, Late Pliocene to Quaternary in age, consist ofalluvial fan and fluvial-lacustrine deposits. During this time span, the basin was endoreic and characterized by amarginal border of alluvial fans connecting transversally with an axial valley.The marginal alluvial fan system (so-called Internal Transverse System, ITS) giving the cyclic interbeddingsourced from the Sierra Nevada area (the main relief of the Betic Cordillera) and connected transversally withthe fluvial-lacustrine facies of the longitudinal system (the Axial System, AS).The ITS was made up of a series of large alluvial fans deposited by a network of low sinuosity channels,coalescing between them to form a bajada system. The alluvial fans had a large radius (10-11 km), over half thewidth of the basin (which was locally 15 km wide), since they lay against the tectonically active margin of thebasin (meaning a high sediment supply/subsidence ratio).At least sixteen progradation phases of the ITS fans into the AS facies have been identified in the centralsector of the Guadix Basin. Although the facies of both systems were connected laterally, the soft slope of theprogradations (almost subhorizontal) resulted in a vertical alternation of the reddish sediments of the transversealluvial fans and the greyish to white fluvio-lacustrine sediments of the axial drainage system.The estimated age for this alternation is based on the previous data provided by litho-, bio- andmagnetostratigraphic studies carried out in the area. This estimation gave an average value of 100 ka perprogradation phase. When correlating the alluvial fan progradation phases with the Laskar04 insolation curve,the estimated ages coincided in most of the cases with the eccentricity maxima peaks. This fact lead us toestablish a cyclicity of ca. 100 ka, falling into the band of Milankovitch high-frequency eccentricity. These phasesare interpreted to be the result of eccentricity maxima, during which winter periods would be longer and coolerand precipitation values would be higher. The increase in precipitation would enhance the erosion in the sourcearea of the alluvial fans, allowing them to prograde cyclically, invading the axial valley each 100 ka.

AB - In the central sector of the Guadix Basin (southern Spain) a cyclic pattern can be inferred from theinterbedding of different continental sediments. Those sediments, Late Pliocene to Quaternary in age, consist ofalluvial fan and fluvial-lacustrine deposits. During this time span, the basin was endoreic and characterized by amarginal border of alluvial fans connecting transversally with an axial valley.The marginal alluvial fan system (so-called Internal Transverse System, ITS) giving the cyclic interbeddingsourced from the Sierra Nevada area (the main relief of the Betic Cordillera) and connected transversally withthe fluvial-lacustrine facies of the longitudinal system (the Axial System, AS).The ITS was made up of a series of large alluvial fans deposited by a network of low sinuosity channels,coalescing between them to form a bajada system. The alluvial fans had a large radius (10-11 km), over half thewidth of the basin (which was locally 15 km wide), since they lay against the tectonically active margin of thebasin (meaning a high sediment supply/subsidence ratio).At least sixteen progradation phases of the ITS fans into the AS facies have been identified in the centralsector of the Guadix Basin. Although the facies of both systems were connected laterally, the soft slope of theprogradations (almost subhorizontal) resulted in a vertical alternation of the reddish sediments of the transversealluvial fans and the greyish to white fluvio-lacustrine sediments of the axial drainage system.The estimated age for this alternation is based on the previous data provided by litho-, bio- andmagnetostratigraphic studies carried out in the area. This estimation gave an average value of 100 ka perprogradation phase. When correlating the alluvial fan progradation phases with the Laskar04 insolation curve,the estimated ages coincided in most of the cases with the eccentricity maxima peaks. This fact lead us toestablish a cyclicity of ca. 100 ka, falling into the band of Milankovitch high-frequency eccentricity. These phasesare interpreted to be the result of eccentricity maxima, during which winter periods would be longer and coolerand precipitation values would be higher. The increase in precipitation would enhance the erosion in the sourcearea of the alluvial fans, allowing them to prograde cyclically, invading the axial valley each 100 ka.

KW - cyclicity

KW - ALLUVIAL FANS

KW - Guadix Basin

KW - Pliocene

KW - Pleistocene

KW - Quaternary

KW - continental

KW - sediments

M3 - Abstract

SP - 101

T2 - 28th IAS Meeting of Sedimentology

Y2 - 5 July 2011 through 8 July 2011

ER -